Curtiss-Wright R-3350 32-WA, 18 Cylinder Radial Engine (Sternmotor), second start

Here you see the second start in 32 years. Most of oil (and white smoke) is blown out now, fire brigade returns back to the station.
Problem is, that we don´t ask power with the result, that there isn`t any manifold pressure. So engine could unload with the result of backfiring..
Also we have to take care, that temperature of cylinder heads doesn`t rise up too hot to prevent ignition without sparking.

[@scubastevedan]

These engines have a special place in my heart after having spent 5 fire seasons working on the P2V-5 and P2V- 7 Neptune Air Tankers. I'll never forget those 3350's and how difficult yet rewarding it was to work on them. 3,350 cubic inches of power and romance!

[@electech_5495]

Were you in the service?

[@scubastevedan]

@@electech_5495 No, but I work for an aerial fire fighting company and we used to use Neptune's, now we use BAe 146 jets.

[@scheusselmensch5713]

For everyone worried about the lack of a propeller, the run time here was not sufficient to raise temperatures of any component to any damaging level. Remember too that these engines are partially oil cooled (and in this video, fuel cooled as well). Even the installation of a test club propeller wouldn't make a huge difference as the air cooling system relied primarily on the engine cowling system and inflight ram air. By the way, even properly cowled, the entire exhaust system on these, before the power recovery turbines, ran bright red in cruise. So don't worry too much.

[@electech_5495]

I feel like it's taken a beating from sitting so long? I really want to know more about these motors the fact that it was used in WW2 and other places where amazing people served, and how badass this thing sounds, but in the other video it was alot louder and pumped out more exhaust that's why I came to the conclusion that it's not on all cylinders? And even the first video seemed to have trouble with some of the top cylinders, seemed like the top exhaust was intermittent with the volume coming out only when they cranked on it seemed like some things are worn or plugged with carbon? Idk ...either way it's amazing and reminds me on a large scale of my 8.1l GMC that big ass motor makes all types of noises that come and go but it's reliable as hell! lol

[@electech_5495]

You should watch the other video of this thing it's a 28 min video, or skim through it atleast I feel it's a better representation of this thing!

[@bigbelconut]

It's not all about cooling. The engine needs a load or it will self destruct. It was never designed to run without a prop.

[@abhisheknakhwa]

This is the best sounding engine in the world!

[@josdiepenbeek469]

Yep, runs like an American watch. Sounds good!

[@InTheDogHouse3DPrinting]

This is the sweetest sounding engine on here so far. Full exhaust with the collectors sounds pretty sweet, and not too loud.

[@turbocompound]

Hi, thanks for your comment. Yes, you are right, engine is running smoothly, but don´t forget, it´s running without any load and only idling. If a full diameter prop is mounted and engine is running full power with water-methanol injection during take-off, you should keep away to a save distance, because engine is growing up to a wild animal. This idling engine is burning 700ml fuel per minute. During take-off, it will burn 12-15 liter per minute, a little bit more and you could imagine, how loud it will be during that prcedure!

[@jeremystuckey8153]

Isn't it marvelous, The engineering that goes into these engines as well as the pressure carbs, the turbo chargers. It blows my mind and wonder who the heck thought this up in the first place. Some guy laying in bed, a HOT blonde next to him and he's thinking about a bellows in the carb. I have to admit, I have solved a lot of running problems while laying in bed at night. Once one understands how and why they work, overhaul, diagnostics comes easy.

[@MarkSmith-js2pu]

And to think how engine technologies progressed in just 30 to 40 years

[@Genius_at_Work]

There are no Turbochargers. The Engine has various Superchargers for different Altitudes, and has Exhaust Turbines too. These don't drive Compressors though, but are coupled onto the Crankshaft via Hydraulic Clutches. That's what "Turbo-Compound" means; that Energy is reclaimed from the Exhaust Gas to drive the Main Output Shaft. Some Truck Engines have similar Systems, IIRC some Locomotive Engines too. Large Ships may have a Turbine Generator in the Waste Gate, which powers the entire Grid and can feed back into the Propeller Shaft via Shaft Motor-Generators.

[@mizzyroro]

That is an awesomely smooth and sweet sound.

[@Skipperj]

Awesome guys ! Thanks for uploading.

[@foxbat212]

What a glorious sound.

[@bkaye2942]

I've been trained and have successfully managed a complex mechanical system for over ten years. I often get advice from idiots. I highly commend the designers of this fantastic engine and I respect the individuals who successfully got this thing running again statically. Any other comment is unnecessary!

[@FlightEngineering1]

I love the sound of that engine. Keep up the good work!

[@turbocompound]

Hi, thanks for comment. Believe me, I keep up work. A masterpiece of engineering, developed on drawing boards, without any computers. Hats off about this master stroke. Regards Andre

[@bigbelconut]

@@turbocompound and your fixing to destroy it. Put a test prop on it, something, it needs a load.

[@colsanjaybajpai5747]

Waooo very smooth performance and i can even smell the exhaust

[@specforged5651]

Love how without the propeller you can hear the supercharger!! Awesome!!

[@mizzyroro]

Is it a supercharger or turbocharger. I thought the winding down at the end meant a turbocharger. I'm a novice.

[@specforged5651]

Mizzy Roro...It’s a supercharger on this one. There are several different systems on these engines of different models and depending on the aircraft they are on, but this one is supercharged. Also, the quick and easy way to tell is the exhaust comes out in several different places after the few collectors, rather than all being all collected into one and going through a turbo. No worries, if you’re a novice that’s how you learn.....questions.

[@mizzyroro]

@@specforged5651 thanks for the info. Do you know what the winding down sound after shutdown was?

[@specforged5651]

Mizzy Roro. I guess I should be a little more clear. It is “turbocharged” in the way you are thinking a turbo works. At this time in the development Pratt & Whitney called them superchargers or turbo-compound in some terms. So yes, that is the “turbine” you hear spinning down. Take a look at some more information on these and the R2800 wasp (just because they are the most popular) to understand how these systems work.

[@mizzyroro]

@@specforged5651 from my basic knowledge, a supercharger reintroduces exhaust air from the cylinders which is already at a higher pressure back into the intake. This increases performances but there will be a steady performance decrease with climb. A turbocharger on the other hand uses exhaust gas to spin a compressor which compresses the intake air keeping a steady high pressure throughout climb until the limit of the pump is reached. I know there are inaccuracies in what I think I know. Lol. Maybe you can point them out.

[@juanasanelli6831]

Que maravilla! Gracias por subir este video ....parece el sonido de un Ford V8 de tapa plana

[@ericrawson2909]

Beautiful engine. Love it.

[@xflyingtiger]

It sounds very, very nice!

[@douro20]

One of the most sophisticated radial engines ever built.

[@rrknl5187]

+douro20 Yes it was, and even more amazing, it was designed in the late 1930s. They didn't have computers or even calculators back then. It was slide rules and hand-written math. Everything was done with pencil and paper.....and lots of erasers......lol. Pretty impressive, I'd say!

[@turbocompound]

Hi GGigabiteM, dont`worry, we are preparing engine very carefully, watching most important parameter like cylinder head temperature of top front and rear cylinder ( never exceeding 230 degrees), oil temperature, oil pressure and speed. Yes, we are looking for a four blade prop from Lockheed Neptune ensuring better cooling. Whereas we don`t ask power, it isn`t any problem, running the engine for short time. The smoke you see around the engine, is vaporizing oil, for one thing preservation oil, for another thing oil from leaking valve covers. Temperature from PRT`s is too low causing problems. Care has to be taken, that RPM doesn`t rise up too fast, overspeeding the engine. If you open throttle for only 3mm, speed is rising up fastly to 3000 rpm, that is maximum speed running our engine. There is much more output reserve, but we limited throttle lever. Regards Andre

[@smaze1782]

Wonderful sound.

[@vinniecross1092]

sounds nice and smooth

[@pmemontage]

fun! the older man is my uncle. the engine doctor. pistons or turbine's.... this man is a genious.

[@turbocompound]

Hi Paul, that's really funny. Our world is very small. Where are you from (which town)? Piet alias "Mr. Curtiss" is a real maestro.

[@pmemontage]

good day sir, Piet is the oldest son of 4 children. my father (meindert) is the youngest. I"m the 3 child of meindert but the first son. I live nearby schagen in a 17th century fishersvillage called kolhorn. Sir Piet has show'n me the magic of radial energy. with the CW, P&W, Bristol and so more piston radial engines but evenalso exposed me with lots of interrest a lot of radial power in turbine technology.

[@turbocompound]

+Paul de haan Hi Paul, thanks a lot for your reply. That's very interesting. Can I find you on facebook?

[@pmemontage]

+turbocompound with big shame and unbelieve.... i'm 30 years Old, and no social media account at all....

[@ChargerMiles007]

Another nice run of this engine! Yes, we will all feel much better once you have the stub cooling propeller installed, we wouldn't want to witness a meltdown of such a sweet engine! Wright Turbocompounds are Awesome, and so are Napier Nomads and Deltics :)

[@wills.5762]

Fancy seeing you here

[@htz26129]

Thats true...:-)

[@rogertycholiz2218]

I also was very concerned about no cooling. My favorites were/are R3350, Napier Sabers, Nomads & Deltics.

[@stwhite5135]

Just incredible!

[@marcelojaviertwt]

*WHAT A BEAUTY BEAST!!!*

[@AshtonCoolman]

It sounds incredible.

[@turbocompound]

JohnnyNismo Believe me, this engine is incredible......-

[@teravolt6113]

All Turbocompound engines are incredible, they're hybrids between piston engines and gas turbines, as such they can be really unreliable because turbines are meant to act only as turbochargers in piston engines and even then turbo engines are more fragile than naturally aspirated ones. (Even the SACM/Wartsila V8X-1500 diesel engine from the Leclerc tank is pretty incredible, just like the R-3350: a whole gas turbine, complete with a combustor, is used as a turbocharger; this is not called Turbocompound, but Hyperbar).

[@boostjunkie2320]

TeraVolt Turbo engines are not more fragile. Just more temperamental because the air to fuel ratio risks that come with running boost. Turbo engines are stronger then naturally aspirated engines because they are built with forged internals. If anything naturally aspirated engines are more fragile.

[@teravolt6113]

With turbo engines you have to be careful that the turbo doesn't overheat or spin too fast, and it needs the proper oil and oil pressure, and if the design features water cooling, water pressure. Things such as proper wastegate functioning and correct AFR (not too rich, not too lean since EGTs can rise up fast). And if there's a converter or a DPF upstream or downstream the turbo you have to be careful it doesn't clog or melt since if upstream the material can destroy the turbo wheel, or if downstream the turbo gets too hot. And the turbocompound system seems pretty delicate, since only a few old truck engines feature it. The Hyperbar is just too fuel hungry and the engine would need to be very strong to not blow up.

[@boostjunkie2320]

TeraVolt That's why turbo engines have bigger fuel injectors, better fuel pumps, forged pistons, rods, and crank. Lower compression. Retarded timing. Built better, stronger from the factory then naturally aspirated engine's

[@fft2020]

heavenly sound

[@bigbelconut]

I love these guys that don't have a clue. That engine was not designed to run without a prop, it loads the engine and provides cooling air. Put a shorty prop on it.

[@ArkaelDren]

Man that sounds beautifull

[@milandrca9954]

awesome sound!

[@turbocompound]

Yes, the best "fuel to noise converter" ever.......

[@Rainhill1829]

That is beautiful.

[@johnedwards1685]

One of the last great glories of aircraft piston engines.

[@MegaGuitarpicker]

Someone said, "There is no replacement for displacement"! So true!

[@tylerbonser7686]

I said that.

[@Tibb91]

For everyone complaining about cooling: the engine won't overheat in such a short running time; also, air-cooled engines can bear a lot higher temperatures than water-cooled ones.

[@rickautry2759]

Ya gotta love that turbo whine!

[@thehouseofcha1nsaw_]

Turbos were used in a few airplanes like the P-38 and B-24 but, like most engines of this time, it uses a super-charger.

[@turbocompound]

Hi David, engine displacement is 3350 cu.inch, that means nearly 54,9 liters. Fuel consumption of idling engine is 0,8 liter per minute. Fuel consumption with propeller at cruising speed 450 liter Avgas 115/145 per hour. Regards Andre

[@jayphilipwilliams]

Awesome!

[@coreyandnathanielchartier3749]

Put a prop on it, and you won't need the van to move it around. Great sounding engine....

[@turbocompound]

Danke für den Kommentar. Ja, der Motor ist aufgeladen. Er verfügt über einen mechanisch angetriebenen Zweiganglader in der hinteren, vorletzten Sektion, der mittels eines Schaltgetriebes vom ersten Gang niedrigerer Drehzahl in den zweiten Gang mit höherer Drehzahl geschaltet werden kann. Zudem sind in die Abgasanlage drei Power Recovery Turbinen (PRT) eingebaut. Je sechs Abgasrohre füttern eine Turbine mit Abgasen und entziehen dem Abgasstrom je Turbine bis zu 150PS Leistung, welche dann über je eine Welle und Flüssigkeitskupplung zurück auf die Kurbelwelle übertragen werden. Die Leistungsrückgewinnung beträgt dann insgesamt bis zu 450PS. Das senkt den Kraftstoffverbrauch zusätzlich um bis zu ca. 20%.

[@corvette724]

This Engine is sooooo fascinating. But is it ok, to operate it without Prop?

[@corvette724]

I hear the Turbos whistling, great..

[@CrazyForCooCooPuffs]

+corvette724 It doesn't have turbos, it has Power Recovery Turbines.

[@turbocompound]

+corvette724 ....Keine Angst, der Motor überhitzt in keiner unserer Läufe. Wir haben alle wichtigen Temperaturen immer im Auge, entgegen vieler anderer Meinungen hier.

[@turbocompound]

+CrazyForCooCooPuffs Sorry, but PRT's are turbines, too. They are called " blow down turbines"

[@bad71hd]

i have one of these engines..how much is a running CW 18c worth? its in our barn and was sealed in cosmolene until last year when i began restoring it. they are very beautiful!

[@ebeaulieu813]

EXCELLENT

[@Robert-ff9wf]

Sweet!!

[@carmelpule6954]

Very nice indeed, but it is so unkind not to cool that engine! This is what I call harmonious workings and healthy relations between components which human society should imitate to improve relations between nations. Congratulations on your dedications and for loving such logic which the human mind could only generate after a million years and after art and politics and other philosophies were shelved and science given the importance that it deserves. Well done.

[@mikrogoon]

good lathe for woodworking, nice rpms

[@JesusTorres-qr1gz]

That is an outstanding work of art, too bad you do not have the propellers which at the same time is the engine cooling fan, that lead the engine to premature overheating shortening the life of the engine, that engine is a priceless trasure please take good care of it, from Puerto Rico....Jesus Torres.

[@sidnorris256]

The round green "buckets" were for PRTs [Power recovery turbines. Supposedly worth about 150 horsepower each] In addition it was internally supercharged {had a low and high blower setting] We always operated it in low blower. If we went to full power [3700 hp] on takeoff [rarely necessary] MAP was 61 inches and 2900 RPM using water injection and 115/145 fuel [purple stuff]. In cruise [If I remember correctly] leaned out 10 percent [using torque pressure indicators] each engine burned about 180 gall per hr at slightly under 2000 hp.

[@Unsichtbarer90]

1:57 "daddy ich muss pissen" :-D

[@zaphodbeeblebrox4386]

ach ! that child who kept sneezing every 45 seconds

[@wohnwagenfutzi8533]

Unsichtbarer90 LOOOOL xD thug life kid :)

[@SkeligMichael]

Na dann. Ans Werk.

[@rogertycholiz2218]

Music to my ears - 18 cylinder turbo compound. The greatest piston engine ever made.(3500HP).

[@randywhite6468]

I can't believe they ran it that long without a prop to cool it. But the CHT was thru the roof.....

[@turbocompound]

randy white Don't worry, CHT never exceeded more than 120 degrees centigrade......

[@jlo13800]

it runs total loss oil injection

[@slimchancetoo]

Sounds just like my Old man's 1956 Ford Customline on a cold morning. It too hard problems getting started and with a smokey exhaust.

[@Visionery1]

Ja, der schöne Deutsche Akzent ... genau so sprach mein Vater, den Akzent hat er nie verloren. :) Der Motor hört sich super an!

[@mike104740]

0:38 bless you

[@turbocompound]

....lol....thank you, that was my son......Happy New Year. 😀

[@mike104740]

***** thanks

[@aaron__halili2084]

turbocompound 1:57 DADDY ICH MUSS PISSEN 😂😂😂😂😂😂😂😂

[@joaovitorleal8716]

I once heard a bulldog breathing like this... But still lovely sound!

[@loligagger85]

Skip ahead to 3:18 to get to the good stuff.

[@NeoAndersonn]

doesnt feels right no propeller on an engine. without load it could overspin, right?

[@LockheedStarliner]

Nice job! What aircraft was this engine originally installed on?

[@turbocompound]

Hi, engine was installed on Lockheed Neptune P2 V-7, a twin engine submarine hunter.

[@michaelcoker3197]

PROP!!!!

[@9INTEXAS]

what kind of fuel does this run on?

[@mickcarson8504]

Great engine but it still should have some fan to allow air flow and keep it cool, or else it will overheat and cook itself.

[@turbocompound]

Mick Carson Now, engine has a prop for better cooling and flywheel effect. But don't worry, engine never overheated during its short runs.

[@mickcarson8504]

*****​ Don't want to say I agree with you but in my 43 years of mechanic/engineering and vehicle body designer, believe me that when an engine is suddenly heated by its own internally fired fuel it expands faster than when it is cooled by either water or air from the beginning. A slow, controlled heating action is better for the engine casing and components bolted to it. Excessive heat not only cause the overal engine to expand and cool when stopped but the stress the heat causes every time it is started this way can definitely crack it, burn gaskets and sealants and weakens bolts that hold the engine heads down. If what you say is right, then how come all cars have engines that are cooled by water via a radiator? The idea is to keep the engine temperature at a constant 80-90C or else they will fry when waiting at a set of traffic lights on a hot day. As for cars like the early Wolkswagen, the air cooled engine is kept cool by a turbofan attached to it. Aircraft engines that have no cooling medium but are depending of free air blown on it are different. They must have a propeller to pull cold air over them, it doesn't have to be an original propeller as long as it can draw enough cool air over the engine. Even model gas engine are started with a propeller in aircrafts and or use a head cooling device over the piston head in model boats where water flows in via a tube connected at the prop end so that either the prop forces the water into the tube, or the water gravity itself from speed of the boat. This engine needs the original propeller, but the blades are cut half the length, machined and balanced to help keeping it cool.

[@Flies2FLL]

Really should use a test club when running that thing. See all the smoke coming off? That is because it is getting hot and burning off small oil deposits. Love the sound of the blow-down turbines spooling!

[@turbocompound]

Don't worry, we never overheat and overheated this engine. And don't forget, it is very old with many hours flown, has a lot of oil-leaks; cylinders and bearings are worn, but all important parameters like CHT; oil-temperature, oil-pressure, etc., we are watching carefully. Now, a prop with shortened blades is mounted for better cooling and flywheel-effect. Hope to run it next weekend again.

[@Lowrider2905]

Der positive Effekt ohne Propeller ist der Sound! Einfach nur geil. Der ist aufgeladen o der?

[@turbocompound]

Ja, der Motor ist aufgeladen. Er verfügt über einen mechanisch angetriebenen Zweiganglader sowie über insgesamt drei PRT's (Power Recovery Turbines), welche die Abgasenergie über Steckwellen und Fluidkupplungen auf die Kurbelwelle zurück übertragen.

[@Lowrider2905]

***** Sehr interessant, vor allem wenn man bedenkt welche Materialien damals zur Verfügung standen. Für mich sind solche Motoren Kunstwerke! Vielen Dank!

[@turbocompound]

So ist es. Im Betriebshandbuch stehen Anleitungen zum Nachbronzieren, Nachverzinnen, etc. von Gleitlagern. Heute undenkbar. Ingenieurskunst auf höchstem Niveau, Respekt.....

[@JesusTorres-qr1gz]

By running the engine without the propeller progressively is causing premature engine damage, that engine is a commodity not easy to find, please take good care of it.

[@nalamobil]

Gibt es eine Angabe wie viel Ampere der Starter bei welcher Voltzahl zieht? Wahnsinn, dass man sieht, dass sich die Kabel bei Betätigung des Anlassers bewegen. Absolut tolles Projekt! Wamm gibt es eine Möglichkeit den Motor mal Live zu erleben?

[@turbocompound]

nalamobil Der Startermotor zieht ca. 38,5A aus drei LKW-Batterien. Zwei Stück funktionieren auch, aber bei 24 Volt dreht er etwas zu langsam. Die Regelvoltzahl (Bordspannung) im Flugzeug ist 28 Volt. Der Anlasser ist recht klein. Länge ca. 32cm, Durchmesser ca. 16cm, Gewicht ca. 13 kg. Der eigentliche Elektromotor macht ca. 6000 rpm. Die hohe Drehzahl wird aber über ein Planetengetriebe extrem heruntergesetzt (25 rpm) bei gleichzeitiger extremer Steigerung des Drehmomentes. Im Anlasser befindet sich eine Rutschkupplung, die über Federspannung auf ein bestimmtes Ansprechmoment eingestellt werden kann. Hiermit verhindert man ein Weiterdrehen, falls es mal zu einem Flüssigkeitsschlag durch Öl in den unteren Zylinden kommen sollte. Der nächste Start wird wohl im April sein, wenn es mal wieder wärmer ist.

[@nalamobil]

Vielen Dank für die schnelle und interessante Antwort! Die Technik ist einfach unglaublich!

[@CrazyForCooCooPuffs]

by the way, where did you get this?

[@turbocompound]

CrazyForCooCooPuffs Hi, I found engine 13 years ago in Northern Italy. Engine was stored in a nitrogen filled container preventing corrosion and it didn`t have any attachment parts like generators, carburetor, exhaust pipes, propeller etc. These parts I found at several companies in the United States, Netherland, Luxembourg and last but not least on Ebay. Supported by nice people with helpful hands it took a long time completing it, but we had and have a lot of fun.

[@snidepete5700]

What would be the taxi speed of that trailer if you put a prop on it? 8-)

[@jeremystuckey8153]

I am curios as to running the engine without a heavy flywheel, Propeller, test propeller or a harmonic balancer, surely vibrations through the crankshaft would cause undetected cracks without using such a balanced weight. Even for short runs I would think a test prop would be necessary.

[@turbocompound]

Hi Jeremy, don't worry, we only made a few runs without propeller. We mounted a prop with short blades for flywheel effect and better cooling last month.

[@jeremystuckey8153]

I sure hope so, the vibrations could permanently damage an engine in a matter of minutes. These young kids take the harmonic balancer off their hot rod cars and install a light weight balancer that 1) is not in balance with that engine and 2) While running the 1/4 mile have no clue that the damage is done. The following month he is out with the hot blond wooing her with the hot rod car, then it makes a strange metal narling noise and stops out in the middle of nowhere, He just scratches his head with a wierd "I dunno look" on his face, he Has no clue, however at this time he is already thinking about that 426 Hemi he saw on sale. The one with the lightweight balancer on it.

[@electech_5495]

I feel like it's taken a beating from sitting so long? I really want to know more about these motors the fact that it was used in WW2 and other places where amazing people served, and how badass this thing sounds, but in the other video it was alot louder and pumped out more exhaust that's why I came to the conclusion that it's not on all cylinders? And even the first video seemed to have trouble with some of the top cylinders, seemed like the top exhaust was intermittent with the volume coming out only when they cranked on it seemed like some things are worn or plugged with carbon? Idk ...either way it's amazing and reminds me on a large scale of my 8.1l GMC that big ass motor makes all types of noises that come and go but it's reliable as hell! lol

[@GGigabiteM]

You should at least install a club propeller on that engine, running it even the length of time in the video without proper cooling can cause severe engine damage. It looks like the engine has power recovery turbines on it which is even more reason to not run it at all without a propeller on it.

[@TheCrankshaftRotator]

Genialer,, vor Kraft strotzender Klang. Welche Leistung entwickelt der, hat er einen Vergaser oder eine Einspritzanlage und welcher Sprit wurde genutzt?

[@turbocompound]

Hi, mit einem vollständigen 4-Blatt-Propeller (Durchmesser ca. 4,20 Meter) und kurzzeitiger Wasser-Methanol-Einspritzung entwickelt er bis zu 3.900 PS Leistung. Dann laufen bis zu 17 Liter AvGas 115/145 pro Minute durch den Vergaser. Der 32-WA-Motor ist ein reiner Vergasermotor. Er hat also keine Einspritzpumpen/Einspritzdüsen. Die Vorrichtungen dafür gibt es aber. Für unsere Schauläufe nehmen wir normales Tankstellenbenzin (z.B. Shell V-Power 100), da dem Motor keine Leistung abverlang wird. Vom Anlassvorgang (Primen) bis zum ersten Rundlauf sind ca. 4 Liter Sprit weg. Danach verbraucht er ca. 1-1,5 Liter pro Minute. Heute noch flugfähige Exemplare laufen mit dem geringer verbleiten AvGas 100, da AvGas 115/145 nur noch für Rennzwecke angemischt wird.

[@TheCrankshaftRotator]

Danke für die ausführlichen Informationen!

[@turbocompound]

+Crankshaft Rotator ....gern geschehen...😎😎

[@n4120p]

any cooling ideas , prop helps with flywheel dynamics too !!

[@turbocompound]

Yes Sir, prop will be installed at the end of this year. We are preparing the blades now ( cutting down to safe diameter, equilibrating the blades etc.) and than we will have cooling and flywheel mass.

[@InTheDogHouse3DPrinting]

Did she have a miss in her? She sounded like she dropped a cylinder or two, I could hear a miss. Or was it the exhaust making it sound like it was missing.

[@turbocompound]

RakinBill No, engine is working absolutely perfect. O.k. Cylinders are worn, but there isn't any miss.

[@charliebaker3143]

Will this fit in my 97 f-treefiddy?

[@notsure3709]

monkaGIGA foorfiddy. Only

[@GreenFillwood]

Surely it needs a prop fitting to act as a lywheel, provide some drag on the engine and to provide cooling?

[@turbocompound]

Now, it has one.......

[@TonVerkleijT3]

Why didn't you put a prop on? Keeps the engine from overheating and gives it sufficient load to prevent it to rev over.

[@turbocompound]

Hi Ton, we are preparing an original prop with short blades. It will take some weeks, but don' t worry, engine does not overheat during our short runs, and it isn't any problem, running it without mass.

[@sdvmax95]

+Ton Verkleij I was in va 165 and this is the engine that we had in the sky raiders There was an instance that with the four bladed prop 13.6 ft long running up and tied down that a pick up truck behind the plane was blown over.

[@TonVerkleijT3]

Very powerfull engine indeed. Love the noise it makes. Just curious to know how it flew, heavy or just light at the controls.

[@ericspooner9199]

Is there a turbo on this? I hear a high pitched wine as the RPM's go up fast.

[@SootyMangabey.]

it has exhaust recovery turbines, like a turbocharger but instead of pressurizing the intake air its coupled to the crankshaft.

[@thebluegreengoose]

You need a mass on the shaft or dummy prop?

[@turbocompound]

Jeffrey Perkins Now we mounted one.

[@Schmaier]

how much litre has the engine??? such a nice sound! wow

[@andrewporter4636]

It looks to massive for the sky raider. Right time though, Korean War. Flew across the Atlantic in a Super Conny,man oh man, 12 hours refueled in Iceland,NY,N.Y. to London. Thank God for JETs

[@mikmacarthur]

why no flywheelfan and cowling to keep her cool?

[@cj599]

Some of the r3350 I read got direct injection is this one of them ?

[@turbocompound]

Cj Pfeiffer No, this is a military version and it is a carburetor engine without injection pumps. Civilian engines have two Bendix injection pumps on the rear section right and left the carburetor core and every cylinder has one injection nozzle.

[@cj599]

@@turbocompound yes it's hard to see from the video

[@scootergeorge9576]

What was the engine originally installed on? When I was assigned to VP-65 their SP-2H used the turbo compound R-3350 like this one. The green "turbo chargers" were actually power recovery turbines. Exhaust driven turbines that directed power directly to the crankshaft.

[@turbocompound]

+Scooter George Hi George, this engine is from Lockheed Neptune P2-V7. All parts of this engine (including four blade hub and blades) are original parts. We will mount the blades this year.

[@scootergeorge9576]

***** It's been since 1974 that I last worked on a 3350. P2V-7 is the pre 1962 designation for the SP-2H. The aircraft were pretty old even back then. One, in fact went directly to the Naval Aviation Museum in Pensacola Florida. One or more others went to Argentina and saw service against the Royal Navy in the Falklands.

[@turbocompound]

+Scooter George Hi George, I have a complete throttle quadrant from a P2-V7. The throttle levers have a position called "military power." What does this mean?

[@scootergeorge9576]

***** As I recall there was Military power and maximum power. Military was the highest setting that could be safely maintained for more than a brief period of time. Maximum was takeoff under high load or emergencies. High rpm and manifold pressures. That's how I recall it. Wasn't a pilot. Just a lowly mechanic. And it's been well over 40 years. Getting old...

[@turbocompound]

+Scooter George Hi George, thanks a lot for explanation. Your age doesn't matter and don't be modest. Without work of mechanics, aircraft is only moving at "ground level".....lol....

[@panduwidagdo7051]

Sounds like that Leopard II diesel engine.

[@lebommjohnson8101]

What acft would have used the R-3350 ?

[@tomnolan9651]

I worked on a Fairchild C-119 that had this engine installed on it. Amazing engine but difficult to service on wing

[@MrOtis909]

How long can it run without cooling?

[@turbocompound]

Ron Kowch Depends on outer temperature. After cold start normally 8 to 10 minutes on idle.

[@turbocompound]

Im Laufe des Jahres werden wir die Nabe mit gekappten Propellerblättern versehen, zum einen wegen besserer Kühlung, zum anderen, um dem Motor etwas "Last" zukommen zu lassen. Die Sorge einiger Kommentatoren, der Motor würde überhitzen, ist nicht gerechtfertigt. Wir beobachten die Zylinderkopftemperatur der oberen Zylinder, damit diese nicht über 200 Grad ansteigt. Der Rauch rührt von Lecköl aus den Ventildeckeldichtungen her, welches auf die heißen Krümmer tropft und verdampft. Diese Dichtungen werden noch ausgetauscht. Die Öltemperatur lag nach vier kurzen Läufen bei ca. 80 Grad. Die Hauptölpumpe fördert je nach Drehzahl ca. 2 bis 3 Liter Öl pro Dekunde. 110 Liter Öl sind hierfür in Umlauf.

[@SunnySalasar]

***** In the coming year we're going to fit the pits with cut off propellors, to offer a better cooling as well as having a little payload for the motor. The worry that the motor might overheat isn't justified. We're observing the cylinder head temperature of the topmost cylinder so that it won't reach over 200 degrees Celsius (392 Fahrenheit). The smoke is coming from leaking oil from the valve cover gasket which hits the hot manifold and evaporates. These gaskets will be exchanged. The oil temperature was after four runs at approx. 80 degrees Celsius(176f). The main oil pump draws, depending on revolution speed up to 2 to 3 litres of oil per second (dekunda?) 110 litres are in circulation for this.

[@turbocompound]

SSakv Thanks for translation.......

[@SunnySalasar]

***** You're welcome, I liked the video a lot and thought I'd translate that bit because it was interesting and i imagined it interesting to other people as well, tho I just guessed seconds were meant and not decunda (which was ten times in my head) Where is that engine situated? Germany, Netherlands? Woould love to see that in reality sometime, tho next thing I'm going to visit will be Bagger 288, the biggest in the world afair. (or at least one of the largest)

[@aeroangrymoose]

SSakv Very nice translation SSakv I was happy to read this. I'm in america and have been with one or two warplane museums in the past. I am an aircraft mechanic myself but on jets. I was very excited to see how well this example performs, it really is a good running engine!

[@Greenfighter67]

wo kann man euch das nächste mal sehen ???

[@turbocompound]

Wahrscheinlich beim 7. Helitreffen in Kleinenbroich am Samstag und/oder Sonntag den 12. und 13.9.15, vorausgesetzt, das Wetter spielt mit......

[@Greenfighter67]

danke für deine antwort und hättes du mal eine PLZ für mich Gruß vom Greenfighter67

[@Greenfighter67]

danke

[@Niteuk]

Start at 3:54

[@xflyingtiger]

Are the green units the PRT's? I would guess.

[@turbocompound]

Hi, yes, the green hoods are the covers with exhaust pipes.

[@gizmo98632]

this is the only radial engine video where I've found the sound of a turbocharger. can someone either tell me where they are located or mounted and how many cylinders feed it or feed how many turbos? I always thought these were at most supercharged

[@turbocompound]

+gizmo98632 Hi, thanks for your comment. The engine incorporates three blow-down-turbines. These turbines are mounted under the light green hoods, (which are simultaneously the exhaust pipes), 120 degrees apart, as you can see in this video. The velocity energy of exhaust gas is used directly against the turbine wheels of these power recovery turbies (PRT). Exhaust gas from six exhaust pipes enter each turbine nozzle from one PRT, causing the turbine wheel to rotate. Therefore 18 cylinders (18 exhaust pipes) are feeding three PRT`s. The kinetic energy, which is taken from the exhaust gas, is transferred across a fluid coupling system back to the crankshaft. Engine uses these fluid couplings - comparing like an automatic transmission in a car- preventing vibrations. Cylinders 4,5,6,7,8,9 are feeding turbine No.1, cylinders 10,11,12,13,14,15 are feeding turbine No.2 and cylinders 16,17,18 1,2,3 are feeding turbine No.3. This system is NOT a turbo charger. In a turbo charger, exhaust gas is spinning a turbine wheel, which is directly spinning a compressor wheel. This compressor wheel will blow compressed air into the cylinders. Thats the difference to a power-recovery-system. By the way, the PRT`s are cooled by ram-air through ducts between the cylinders preventing overheating. This engine doesn´t have a turbo-charger, it has a mechanic driven two stage supercharger, mouted in the supercharger front housing, where the PRT`s also are fitted. The impeller speed of this charger can be shifted with a clutch from a low-blower to a high-blower position, depending from flight level and power settings. In the first gear, the (low-blower) ratio is 6.46:1, in the second gear, the (high-blower) ratio is 8.67:1. Hope, that these are not too much infromations.

[@gizmo98632]

+turbocompound so similar to the axial power turbine of the dd15 Detroit diesel engine. that uses spent exhaust from the turbo to power a turbine connected through a gear set to the rear of the crank.

[@turbocompound]

+gizmo98632 ......watch the other videos of my engine runs.....

[@danhly1109]

Khoi tum lum 🛫🛬✈

[@OHBISX]

How much torque and power have this engine? And their RPM?

[@rrknl5187]

+CORISCO OHBISX I flew DC7s as forest fire tankers back in the 70s. They had 4 - R3350s. Each engine would produce 3400HP at 2800 RPM for takeoff, then 2900 HP continuously.

[@OHBISX]

Rob Kennel Wow fuck!! Beautiful little horse powers!! And torque do you know? I`m brazilian.. but a love these monsters!! Tank you for answer!

[@turbocompound]

+CORISCO OHBISX Hi, thanks for comment. This 32-WA- engine has a maximum of 3900 hp take-off power for a limited period with water-methanol injection. Cruising power was between 2400 and 2800 hp. How much torque engine has, I don't know. Perhaps somebody is able calculating it.

[@turbocompound]

+Rob Kennel. Hi Rob, thanks for comment. Your job sounds interresting but dangerous. What did you do? Firefighter or pilot? I think, DC-7 had direct injected R-3350 engines. The Bendix fuel pumps were fitted right and left beside the carburetor core. My engine is a carburetor engine without any fuel injection.

[@rrknl5187]

+turbocompound Pilot. Firefighting is interesting, always turbulent, sometimes really rough! Like any type of flying, it can be dangerous, but if you dont push things too far, its safe. Yes, they were fuel injected and had water injection for takeoff power. They also had the Power Recovery Turbines. Since it was always hot weather, we had to watch the cylinder head temperatures closely since they would overheat during climb out.

[@jaarryifleshblood315]

Do they pollute the air more than a jet?

[@turbocompound]

Yes, they do. In early 30 to late 60 years, engine fuel contains a lot of lead. But air traffic was less. Today, more and more piston engines are running on normal MoGas without lead. Only a few old piston engines today need leaded fuel. Today huge amounts of Jet A-1 fuel is consumed by millions of aircraft, producing fine dust, CO2 and NOx. Our engine is running on Shell V-Power 100.

[@jaarryifleshblood315]

turbocompound what is there runtime between shut offs?

[@turbocompound]

JaArRyi FleshBlood Cold engine 8-10 minutes depending on outer temperature, warm engine after one hour break max. 5-7 minutes. Maximum oil temperature was 115 degrees centigrade, cylinderhead temp. never exceeded 150 degrees. Now engine has a prop for load and little bit cooling.

[@nikolaospeterson2495]

Screw the stub cooling prop, get a REAL full size propeller (correct momentum and flywheel effect) as the engine was intended for! I would like to find TWO of these and run together (as in a twin aircraft) for the synchronocity and 'beat' between the two engines, with actual full props and even a plane to put them in and fly! Also i would modify the fuel as to avoid all fossil fuels and use hydrogen, as that is the only non pollutong fuel on the planet, the exhaust condensed, one can almost practically drink as water, as it would indeed only be H2O!

[@gregburris6174]

Anybody recall what planes this engine was used on?

[@Oldbmwr100rs]

Early postwar airliners like the DC7 and Constellations I believe, at least with the turbo compound units fitted to this one. They were run for many years, well into the 60's before jets became more economically viable for smaller airlines.

[@crobulari2328]

Needs some air cooling !!.

[@Spawn-td8bf]

Never saw an air cooled engine from an aircraft run with no blades or reduced blades for cooling.

[@turbocompound]

+Spawn 1960 You are right but don`t worry, a prop with reduced blades is mounted now for flywheel effect and better cooling. With running the engine, we don`t ask power and we never overheat it. Most important parameters will be observed carefully.

[@Spawn-td8bf]

+turbocompound Good to read and see that this mechanical gem is in good hands and God Bless the little sneezer. Someone sounds allergic. You sound like great caretakers of the heritage . Thanks and God Bless.

[@turbocompound]

+Spawn 1960 ...lol..my son is allergic a little bit and he is a bigmouth as you can hear..... On facebook put "Round Engines Forever" to the blank line. There you will find some picture from my engine......

[@Spawn-td8bf]

+turbocompound Well , God Bless him . I have a bumper sticker that states "Real airplanes have round engines" on my truck , though there is definitely something to be said about a lovely Rolls- Royce Merlin .

[@FrancoisLabelle-yf8tj]

I did not think it was good for these engines to run without air being circulated into the cylinders....and not to have weight for momentum resistance on the driveshaft, like a small, reduced propeller?

[@superduperbard]

OMG

[@mikmacarthur]

is 3 turbo?

[@Flies2FLL]

"Blow-down" turbines. They sent power to the crankshaft, instead of turning a compressor that pressurizes the intake. VERY touchy, had a tendency to overspeed and fly apart if the throttle was moved too quickly. These added about 200 hp each, there are three of them.

[@MrFrontenginedragste]

The Power Recovery Turbines (PRT) are a bitch to change as well....especially the lower ones....a really great way to get a couple of qts of AeroShell on your head.

[@leneanderthalien]

no 50hp each, 150hp in totality, and they not overspeed because are damped from a hydraulic converter (same as on a automatic gearbox)

[@turbocompound]

+leneanderthalien Sorry, both are wrong. Each PRT is able, feeding back 150hp to the crankshaft at cruising speed (~2.600 rpm).

[@tubedude54]

Only 18 zylanders?? (Just watched video of a P&W 4360... 28cylinders)

[@turbocompound]

tubedude54 Definitely 18 cylinders !

[@hannesjakob228]

Hallo Andre Ich würde gerne mit Dir in Kontakt kommen, denn ich besitze auch eine TC18. Es ist ein R3350-89A. Viele Grüsse

[@kilroythegreat7575]

now put a screw bit on the end and you got your self the worlds most manly'est screw driver

[@wills.5762]

1:17 *GESUNDHEIT!!!*

[@turbocompound]

....danke......