A STUART MODELS TRIPLE EXPANSION ENGINE - PART #3

[@johnnyholland8765]

As an aerospace machinist of 30 years that is simply amazing...

[@camillosteuss]

Love how she sounds like an idling diesel at 5.45... Has that same industrial rumble of harmony that a good 4 tact diesel has, especially the larger diesels, like large truck engines...

[@mattstevens4667]

I have just purchased a casting set for this model and got together all the materials.....expensive but very impressive engine also. I purchased it with money left to me in a will from a close family friend who passed away just over a year ago - hence once i get it complete, it will be called "Stan". Beautiful engine and the one shown is to a very high standard!

[@fuzzcopter467]

How’d it go?

[@kaibroeking9968]

Thanks for showing a thing of beauty. We can all use a bit of distraction!

[@aflatminor]

This reminds me of the large 3 cylinder engine that was at our works until 1978, I started work at British Steel, River Don the following year so never saw it, Had to pack in last year due to the after effects of the virus! 🙁 It's at Kelham island industrial heritage centre now and is (Or was before covid!) Steamed up every so oft, I'll have to get there and watch it sometime! Love your vids by the way 👍🙏

[@garyruxton5226]

Oh what a beautiful sound. Glad you ran it for a while so we could hear it. Sounds almost like a full size launch.

[@davescreations7793]

Wow that engine could run a generator very nicely thanks for all your work and videos I do enjoy them a lot

[@mikethestonemanbarber6917]

I have rewatched all of your videos and you truly are gifted at ur hobby and I thank you 4 taken your time out of been a big musician and sharing your knowledge

[@elburropeligroso4689]

When the video is slowed down, the sound is reminiscent of the giant triple expansion engine at Kempton Park that I've seen in videos.

[@chriswilson2431]

Oh I love it. What a superb little engine indeed! You lucky lucky so and so!😉. Thanks for sharing. It’s really something special that is.

[@JamesPetts]

It is lovely to see this running on steam.

[@dancaptain2055]

Very very cool. I too enjoyed the video very much. Thank you

[@keithappleton]

Glad you enjoyed it {:-)))

[@johnfox4691]

A beautiful piece of engineering.

[@dampfronny2734]

Sehr gute Maschine und ein sehr guter Film.Ist für mich hilfreich,ich habe eine Zeichnung der Tpiple erworben und werde die Maschine ohne Materialsatz bauen.

[@cadser0engco]

After a day in my workshop pulling my hair out. This is a great relief .

[@The7humpwump]

No need for viagara after watching that. Amazing piece of craftsmanship

[@Herby-1620]

I find these very interesting. The big question I have is how much power can/do they produce. Can you hook up a dynamometer or some such that might indicate what such an engine would do under "load". I understand these little engines can be quite powerful for their size. Great video and video series.

[@douglasmcdermott2830]

Herby1620 The Stuart triple from memory isn’t terribly powerful, but the Stuart 5a produces 1 1/4 horsepower at either 300 or 3000 rpm, I can’t recall which. They also make a very large compound launch engine which has been known to generate 2 1/2 hp.

[@DAKOTA56777]

@@douglasmcdermott2830 The Stuart 5a is 1.5hp with 100psi at 800rpm, listed on Stuart's site. 3,000rpm is... quite high, for a steam engine.

[@douglasmcdermott2830]

DAKOTA56777 yes I realized that after I typed it but didn’t bother to edit

[@MilanDupal]

Great machine. Thanks for posting.

[@The123pcr]

the prefential running direction (quitest performens) fits to the pitch of prop (ahead)... perfect :-)

[@Da5idc]

Love this engine 🙂 Is the valve chest for the intermediate pressure piston part of the high pressure piston casting? It looks quite crowded in that area

[@keithappleton]

Yes, it is

[@Da5idc]

@@keithappleton thanks for the info I'm holding thumbs that you get one to work on one day - I'd love to see the innards of one of them

[@guywren4801]

Such ingenuity and skill - thanks for showing. I notice that the flywheel needs a little turn to get it going - how is this managed with the full size?

[@keithappleton]

The large full size engines often used a "Barring Engine" to turn the crankshaft into the correct position to start. Sometimes something called a "Simpling Valve" was used to admit steam to more than just the high pressure cylinder to start the engine.

[@guywren4801]

@@keithappleton Thanks for the reply - very interesting.

[@jeffanderson1653]

This engine is fascinating. Thank you for sharing your good fortune. What is the value of a triple of this caliber? There must be over a thousand man hours in this build

[@keithappleton]

Yes it is a lot of work to build one of these, as to the value . . . I will just say "reassuringly expensive" }:-)))

[@royseifert3078]

Keith, when you changed from forward to reverse, then from reverse back to forward you had to start the engine by hand, why is that? Another great video and fun to watch, thanks.

[@keithappleton]

Compounds are generally not self starting unless the cranks end up in the right position . . .

[@johnutting9615]

Can be considered to be a single cylinder enngine

[@Genius_at_Work]

@@keithappleton That's why real Compound Engines have a Bypass Valve to pass Steam around the High Pressure Cylinder directly to the Medium/Low Pressure Cylinders, incase the High Pressure Cylinder came to stop in TDC/BDC. At least Marine Engines have that, as they must be started many Times when Manouvering. Stationary Engines like Generator or Pumping Engines may have to be slow turned to Starting Position instead, as they aren't started very often.

[@azlandpilotcar4450]

Wonderful engine.

[@TimsBitsnPieces]

Keith, what are the 2 pumps on the side of then engine for? This is a magnificent machine, it looks and sounds fantastic.

[@keithappleton]

One is the boiler water feed pump and the other larger one is the condenser vacuum pump.

[@nitro105]

Great little engine keith, I noticed that you had to turn it off dead center to start it, would a full size engine have a starting valve that let high pressure into the low and intermediate steam chests for starting? something like an intercepting valve?

[@keithappleton]

they used a "Simpling Valve"

[@jacobditmars8414]

Very nice engine, but I have a question. I also know that the propeller is for show, but if used in a marine application, why would you want a non-self starting engine?

[@keithappleton]

It's really not for a model boat ......

[@jacobditmars8414]

Ok, thank you for the answer then.

[@michaelvitetta7231]

I have a question, after running on steam what do you do to the engine? That is before you put it away what do you do to clear out the water and do you relube the engine? How do you clean it? Just wipe it down, spray anything?

[@keithappleton]

Why not watch the video to the end?

[@jxgreer]

If you were to go though a selection Stuart Engines from difficult to hard, which ones would you pick and in what order?

[@keithappleton]

Sorry, I only give free advice to my Patreon Supporters www.patreon.com/keithappleton

[@paulrayner4514]

just out of curiosity should this engine be self starting? or is it because its still a bit tight? I would imagine on the full size one's they will be, or do they have to stop them in a certain position like they do with beam engines. It's a beautiful engine and nice to see it running rather than stuck behind a glass case.

[@keithappleton]

Compound steam engines generally do not self start unless they have a "Simpling Valve"

[@paulrayner4514]

@@keithappleton ok. I didn't know that, I will google Simpling Valve now. thank you. regards

[@krzysztofjaxaswist1434]

I know that this may be a little crazy idea.... But do You think that a small engine like that with some reduction in revs, would be able to power a 2 person lightweight "car" like wehicle build of bicycle parts? I mean ...human power on bike isnt very much and it runs... now taking the torque of steam ... Could you comment on that idea?

[@keithappleton]

Not powerful enough and it would prematurely wear out. It is after all just a working model Steam Engine.

[@krzysztofjaxaswist1434]

That's what i thought... But hopes were high 😁 A nice triple expansion steam engine on my imaginary car looks just perfect. Single cylinder launch boat engine just doesnt give that wow effect. I don't want to take too much of your time on my idea, but what would you recommend? Building it from scratch or is there somebody that makes bigger steam engines than that beauty you showed here. Btw. Im learning plenty from your videos and hope youre not going to stop anytime soon 😊

[@keithappleton]

There is a commercially manufactured steam car available, and they are not too expensive to buy. It is called a "Likamobile". maybe by Googling the word you may be able to find more details about them. I found a picture of one here: www.stationroadsteam.com/likamobile-steam-car-stock-code-3767/

[@trichter7233]

I build a Stuart D10 with Reverse. It runs very fine. Nothing is knocking. Should i try a Stuart Triple? Is it hard to build this engine compared to a D10 with reverse?

[@keithappleton]

If you can build a D10 with reverse that works, then maybe you should try a Triple }:-)))

[@railbro4963]

Awesome video!

[@philhealey449]

Why would you not initially run it with the cylinder cocks open to avoid risk of hydraulic lock, or was it already hot from previous running ?

[@keithappleton]

it was already hot and drain cocks like these always make a mess . . .

[@philhealey449]

@@keithappleton All good, I was just surprised. Shockingly 35 years since I built my Stuart Number One taking 4 years commencing when I was 18 and pleasingly it's much better than many of your patients. Maybe time I exhumed my round bed Drummond lathe , seeing your videos with loads of tips thank you!

[@jaxonevax6135]

That is just too cool

[@jerryuhte1284]

Keith , finally subscribed ! Been watching for a long time , really enjoy all the info and great videos ! Should have been a Machinist !

[@JamesPetts]

Incidentally, given that there is a displacement lubricator, what is the purpose of the cylinder oiler?

[@keithappleton]

What cylinder oiler, I see a water pump and a condenser vacuum pump built onto the engine but no mechanical lubricator . . . hence the Displacement type.

[@43manning]

A lovely thing ( from a Batley Lad). Ayup!

[@chrisyu98]

have you ever measured the HP output of your engines?

[@keithappleton]

No .....

[@johndii2194]

7:30 I hear its heart beating.

[@railwayreviews763]

the next you are going to work on are you going to make it public on youtube?

[@keithappleton]

In a couple of Months time maybe . . . . www.patreon.com/keithappleton - why not have a look }:-)))

[@ilfarmboy]

wonder if it could power a small boat(1 man)

[@keithappleton]

not really - after all it is a model engine.

[@johnutting9615]

Somewhat surprising that a 3 cylinder needed hand starting. Would have thought it would have been a self starter. Comment

[@keithappleton]

It is a 3 cylinder 120 degree crankshaft compound engine and would need a special "Simpling Valve" which allows steam into the other cylinders other than than just the first high pressure one, to allow self starting.

[@johnutting9615]

@@keithappleton got it,I'm used to 90 deg crankshafts on twins. Thanks

[@Harrlond]

would this actually work to power a boat?

[@keithappleton]

Yes a large model boat.

[@Harrlond]

@@keithappleton Do you know of any brands that could power a small 1 person watercraft? Thanks.

[@keithappleton]

A Stuart number 4 would just about do it I think - with a suitable boiler.

[@Harrlond]

@@keithappleton Thankyou very much. I'm a fan of all the videos you produce. I can't own all the models I want, this channel is the next best thing!

[@jamesbrock1883]

4:25 Cyborg Keith

[@franknapolitano9144]

Whatis the Stuart Model Number # for this Engine ?

[@keithappleton]

Stuart Triple Expansion Engine

[@franknapolitano9144]

@@keithappleton They should also offer a Machined Kit Version !

[@Jack-hg1hq]

people often ask me why don't you put the condensed water back into the boiler feed tank, 5:04 thats why.

[@enedenedubedene4811]

Wieso ist diese Maschine nicht selbstanlaufend?🙄🙄🙄🙄 Viele Grüsse aus Germany

[@keithappleton]

Triple Expansion Engines will only self start if fitted with a "Simpling Valve" to admit high pressure steam into more than one cylinder.

[@Blue.4t2]

🔧😊👍

[@LTD347]

The comments are showing as posted 1 and 2 months ago, but the video was uploaded 20 minutes ago. How strange

[@keithappleton]

Not strange at all - I make these videos for my Patreon supporters, and not all of them become public anyway. Patreon is currently 2 Months ahead. (over 60 videos in front of the free view KZbin stuff) www.patreon.com/keithappleton

[@LTD347]

Keith Appleton ahh that does make sense. Thanks for the explanation. I thought KZbin was having a blonde moment 🤣

[@TheSacqueboute]

Needs a very tiny donkey engine for maximum modeliness. :)

[@jdmccorful]

WD-40 has many uses! Beautiful combination of machinery. BTW, you consistently use adjustable wrench the wrong way according to the Engineer that mentor my training early on. Called them "knuckle busters".

[@dampfronny2734]

Wonderful engine.