leyland l60 6 cylinder 12 piston engine (monster)

more great machines ... www.bebo.com/allistairc123
an engine from a chieftan tank 12piston opposing 2 stroke multi fuel engine being given a good rev!!, sounds great!!
read the comments to see how it works...

[@johntdso]

Yes, it is a 2 cycle opposed piston engine. You can hear the scavenger (blower) when the engine is revved up. Fairbanks-Morse has a series of 38D5-1/4 and 38D8-1/8 engines. Many power plants use the 12 cylinder version of the engine for power generation. Engine is rated 1600Hp @ 720 RPM and the turbo boosted engine is rated 2880 HP@ 720RPM.

[@niguk1]

My grandfather scrapped loads of WWII stuff and I can remember a brand new complete one of these sitting on a pallet. My father tried to give it to a local musuem, but they already had loads of stuff so sadly about 15 years ago it went for scrap. I always wondered what it would have sounded like.

[@loganzister9344]

I would have wanted to make a pulling tractor with it lol

[@InflatablePlane]

Ooooh! That exhaust note at full speed just gave me goosebumps! I wish cars could sound that good 8-) And these engines were pure genius! Along with the Deltic Diesels used in the BR Class 55 Locos 8-)

[@DrFruikenstein]

I love the old engines, and I do know how most work. There are usually two crankshafts, and no head. I have seen one that had a single crankshaft that had two pistons per cylinder, but it was a sterling engine. I would imagine that there's an internal combustion version of that type as well... After all, they figured out how to make an entire engine spin while the crankshaft is stationary over a century ago.

[@aussiepaul44]

The Germans used an engine similar to this during the 30's in their Junkers Ju86 aircraft. It was a Jumo 205. 6 cylinder ,12 piston ,2 stroke with a centrifugal super charger and direct injection. It performed well but apparently was unreliable under high load conditions.

[@zopEnglandzip]

Developed well before the war for transatlantic mailplane operations, Napier in England built them under license for airship use this experience lead to the mighty deltic for admiralty use and Napier then provided technical assistance to Leyland through Rolls Royce for the design of this engine so it's a junkers descendant.

[@waterworkss]

SWEEEEEET. We used to have a similar Roles Royce motor form a, I think Swedish Tank. 2 stroke 12 opposing pistons, 2 cranks, mulit fuel, remote/dry sump, tho it had a huge scavenge blower on the side... It used to rev @ 3750rpm all day and use around 60lt of fule!!! We had it in a boat :) I loved that engine! Thanks for posting your vid :)

[@motorhead6763]

Deltec is a interesting engine.Triangle three crankshafts two stroke. I love Perkins have a few of em. Brits make nice motors.שלום

Saw your upload years ago and happy to see it's still here! There used to be an AEC Matador in McGuinness's scrap yard in stoke on trent, it was kept in a separate compound where there seemed to be loads of interesting stuff along side it. I always thought a Leyland L60 would have been the perfect power plant for such a cool old truck!

[@sandrahorsfield3495]

A good engine but slightly under powered for the Chieftain MBT. A lack of vibration damping caused to many ancillary oil & fuel leaks!! Had many happy hours working on this piece of kit

[@theworldaccordingto4555]

I helped design and used to make these monsters! Along with designing and producing other MOD kit. A great engine in it's day and for me the later 750bhp engines were really the only adequate engines for the weight of the Main Battle Tank of the era (IMHO). You live and learn, eh! But still that tank was one of the best in it's day. I think the multifuel design was a great idea, because in battle or advancing through a country you may not always have the fuel at hand if the engine is single fuel only. (obviously). I think it was a NATO requirement at the time to be multifuel. A good idea imo. It's funny you mentioning vibration and fuel (or oil) leaks because my old Triumph Bonneville[s] and old BSA were the bloody same. Lots of vibration through the frame to the foot pedals, causing you feet to go numb on a long(ish) ride. Worked on so many old Truimphs trying to solve problems with them. With the Triumph it was a an initial case of the head & engine (overall) not being good enough for the amount of compression that engine piston produced, they were literally trying to blow the inadequate head off! They'd leak from everywhere if you was unlucky. But a great looking bike with lots of kudos if you had one back in the day, late 1960's - 70's. (Those were the days, eh! Hahahaha! When you had to stop for oil as much as fuel). The Norton Commando was a better bike at the time, in the 1970's. Much more a cafe racer of the day and an 850 engine to boot, and handled better (but for me the Triumph had the looks) I had both (a sucker for punishment!). People always said to me, "I know it's you before I can even see ya!" But to be honest, Give me a modern bike any day, (but it is hard not to let nostalgia stick it's nose in ;-) A good friend has just got a Triumph Rocket 3 (now that is a f'kin' machine!). 2.5 litre! 0-60 0n 2.7 seconds! And it looks and sound like the effin bizniz! (unfortunately I ain't fit enough for that game now, but given half a chance... ;-) If you ever want to know what it was like riding those old bikes, then listen to the song that conjures up what it's was like (and about) being on a bike back then (Ton Up!), then listen to, 'Vincent Black Lightening 1952' by Richard Thompson. (It tells the story...acoustic version is my fave, you'll find it on KZbin). I even had the long red haired girl in black leather sat on the back! Much to the despair of her parents! (but that's as far as it went for me, as far as the song goes).

[@charlesangell_bulmtl]

@@theworldaccordingto4555 My limited experience w/Norton was one of learning. But just looking at the Lucas upgrade compared to most but maybe a few of the BSAs, told me a story of superior build... The issues of poor quality control were easily corrected, if vested. The sweet part of the Brit bikes was parts availability...if you weren't too impatient to search and await. 'Fair spares' is the key phrase, as many of the pieces just needed that internet availability we take for granted... Oh, a USNOA/INOA membership was very valuable as well.....👍

[@oilyboyMatt]

Also used laid horizontally,(as it was designed to!) in some passenger trains... But not a lot of people know that!

[@vtecpreludevtec]

Man down the road had a ts3Commer truck when I was a kid,noisy!knocker.love Detroit sounds too,comeback 2stroke diesels 😎

[@madeljacky]

Thats a class soundin engine. Ive seen Ian Greer at many of the shows last year with it. It really tingles your ears when he lets her rip!

[@glenrea]

it's a 2-stroker; uses 2 pistons going toward each other to provide the compression instead of a cylinder head. a Deltic engine works on the same principle - and they really are monsters!

[@urielitocd]

yeah! It's a very brilliant old engine!!! 2 pistons into 1 cilinder!!! "wow" from Argentine, Córdoba my friend.

[@strobx1]

@Tremolux59 Two stroke diesels are not "super Charged". These are "scavenging blowers" . They will not run without them. EMD uses one Rootsblower on each bank of cylinders. Any "boost" at all is very little. In the 1960's EMD started turbocharging their engines. The turbo provided scavenging air + boost. They were at low speeds gear driven until the boost caught up with the fuel input. Then the Turbo "Free Wheeled".

[@allistairc123]

there is actually a few great animations if you google image search. there is a great animation of the even more complicated deltic engine

[@douro20]

@mlnhead1 It is an opposed-piston engine. There are two pistons in each cylinder, and combustion occurs right in the middle.

[@winterstellar]

@urielitocd 2 pistons share one cylinder, yes. They're opposed to eachother in long cylinders. Two crankshafts are connected to six pistons each, one crankshaft in either end of the cylinders. It's a brilliant old engine.: )

[@MuscatelTom]

after the jumpy idle it sounds clean and smooth

[@salemcripple]

because it's an obscure design, and the chieftain tank is the only example (that i currently know of) that uses it. I've been around internal (and external) combustion engines my whole life (even have a college degree in it), and have never even heard of this type of engine until i came across your vid. That's how come people keep asking about it. That and people generally don't want to sift through the hundreds (on average) of comments to find an answer, when they can just ask.

[@geizzie]

I love the sound and the principle of this kind of engines, like the little Commer vans

[@ranexion]

Powerful,beautiful sound!

[@mavericmorph5358]

Apparently, this engine has around 750hp not 850hp.... Apparently! Does sound really nice though! The opposing pistons are in a vertical arrangement, which seems odd to me as led down on its side would make much more sense saving on space in the tank? Usually, you would have a roots supercharger on a two stroke diesel. However, I couldn't see or hear it? Now a days though, everything has been sorted and we the Brits have the best tank in the world. The Challenger 2!....NICE!

[@stewartbrown8115]

Depends which mark it is

[@Tremolux59]

@hoplite46 Yes, 2 pistons per cylinder. It's called an opposed piston engine. Google them and you will see how they work. 2 crankshafts. It's a 2 stroke with ports in the cylinder walls for intake and exhaust. One piston covers the intake ports, the other piston covers the exhaust ports. It's probably supercharged as well.

[@tpvalley]

I used to help out with deltics as a kid, they work in same way but have 18 cylinders and 3 crank shafts!

[@flexyco]

I wish my car would sound like that.

[@1100HondaCB]

Put this engine in an Enviro 300 bus and it would sound great.

[@g8ymw]

The Leyland engine was so good, the Saudis demanded a Rolls Royce engine thus the first version of the Challenger (Rolls Royce Diesels was bought by Perkins who were then bought by Caterpillar)

[@Lacanzonedelpadre]

@mlnhead1 this engine has 2 opposed pistons per cylinder, so we have 2 crankshafts in the engine block that have the same rotation.

[@milksheihk]

@micheals1992 2 stroke diesels don't crankcase scavenge like a petrol 2 stroke, the rely on supercharging or turbocharging for scavenging, the crankcase remains completely isolated from the cylinders, these engines have sump lubrication for the bottom end.

[@Flies2FLL]

This is the twin crankshaft engine. This design was copied of of a WWII German aircraft engine called a Junkers 205. There is a crankshaft at the top and a crankshaft at the bottom, linked with gears. The engine is a two-stroke, and intake and exhaust work via ports in the cylinder. The idea is for full expansion of the gases before they leave the cylinder for maximum efficiency. This was done before turbochargers were practical.

[@51362879]

@theseeker15 Fairbanks-Morse did exactly the same thing. Many were used as Marine gen sets engines on Submarines as well as stationary. Ixcellent engineering!

[@vermillion.__-_.]

can hear that huge supercharger too, very nice

[@Bevoin1970]

Wow!! Thats a very nice sounding engine...!!! I would enjoy starting this baby up every day and setting off to work. :-)

[@crisp2882]

it is like having 2 commer ts3's into 1.awesome sound and engine.

[@Led757]

that thing sounds really nice

[@paveldaddy]

I want that sound in my car!

[@richardgrant7055]

Only if you live on a bus route...........

[@allistairc123]

@kita534 your question has been answered numerous times in the comments below, keep reading

[@nemodapimpfish]

it sure sounds good

[@PusterPL]

Sweet sound of that engine :) Thanks alot for this video :)

[@douro20]

@strobx1 No, EMD still makes the 710. They made the H-class 4-stroke engine for a while but discontinued it because they couldn't meet Tier 2. Emissions are not really a problem for 2-stroke diesels. The problem is noise.

[@allistairc123]

good point, although sidevalves may be possable?

[@milksheihk]

@benhanson3 two pistons in each cylinder moving towards each other to form a combustion chamber in the space between them, engines like this often have two crankshafts but some, like the Commer TS3 have rockers that deliver power from a the conrods back to a single crankshaft.

[@vanapplebomb]

Thermal efficiently of opposed piston engines tends to be quite good due to the shape of the combustion chamber. They also have fewer moving parts, so there is less to go wrong. This particular engine did have its quirks though. Fairbanks Morse opposed piston engines really showcase the advantages of opposed pistons. They are super reliable, very fuel efficient, and quick to accept full load. This is why they are frequently used as standby generators in nuclear power plants...and by the NAVY.

[@ipanzerschrecku4732]

less to go wrong?... from a notoriously unreliable engine prone to constant breakages.

[@MarcABrown-tt1fp]

@@ipanzerschrecku4732 The L60 had problems with oil flow in the upper crankshaft bank due to the fact the oil pump was located much closer to the lower bank for space reasons and resulted in less than optimal oil circulation, causing detrimental wear and tear on anything in the upper crankshaft. That was just a limitation of the time, if not engineer incompetence. It would have been a great engine for 40 ton vehicles.

[@roadwolf2]

@benhanson3 most likely the engine has two crankshafts and the pistons actually share a cylinder in an opposed fashion like in a commer knocker

[@mrspivvy]

@mlnhead1 Opposed piston 2 stroke diesel engines were quite common once. you have 2 pistons per cylinder, with a crank at either side. the combustion chamber is formed by the pistons coming together in the same cylinder, an idea that goes back to the german junkers company in the 1920s. you'll get a better understanding if you google "commer ts3" or "napier deltic"

[@vanapplebomb]

It does, but it is tucked away on the side out of site. It is quite a large blower too. Much larger than your typical Detroit blowers.

[@superbigkev23]

this is one cool piece of mechanics.. didnt even know hey made those .. lol

[@kleetus92]

Fairbanks Morse used this type of engine in submarines and also early railroad locomotives. The top set of pistons drove accessories for the engine (blower, oil and water pumps etc) such that there was no load to the main crank. Maintenance nightmare though...

[@weldermaniacbob]

wicked!!! love the sound.. I want one!!!!!

[@gaudeamus66]

@Skullmonkey456 Reply from 1966 Leyland graduates: We had a reunion in June and I bought a small book on the Chieftain tank by Simon Dunstan dated 2003. One of my colleagues was put on L.60 assembly at Leyland Spurrier Works in 1967. The rating in the original brochure was 700 bhp but it went out at 585 bhp due to piston overheating. Gradually through development the rating was increased and finished at 850 bhp. The L.60 was based on the German Junkers JUMO205 diesel aero-engine flown in 1932.

[@allistairc123]

although the high revs suggest it wouldnt be torquey. ill have to google that

[@bentboybbz]

ooooo its a two stroke with two crankshafts and opposing pistons...nice vid

[@madeljacky]

I must do that the next time i see him at one of the vintage shows.

[@charlesangell_bulmtl]

👍These, Krupp's & Nissan inlines are crack sharp sounds, Detroit 53 series are another that pretty the air with their presence...

[@Squarerig]

Dr.Junker would be so pleased!

[@NZMantaGSi]

@mlnhead1 - two opposed pistons per cylinder, ie; each cylinder has a piston at each end, engine has twin crankshafts. Junkers jumo aircraft used opposed cylinder diesels in WWII, Napier made triangle opposed piston engines with three crankshafts, used in trains - engine was called a Napier Deltic. Theres heaps of examples, old technology but bloody neat. Old Commer vans had them too (3 cyl)

[@wmralder]

It's the same configuration as the Fairbanks-Morse diesels and is based, I believe, on a design for an aircraft diesel by Junkers from before WW2 and used in the Ju86 bomber. Like the above mentioned design, they use a supercharger for moving air into and then out of the cylinder and piston ports to control the timing.

[@allistairc123]

what damage does blipping it cause?

[@crisp2882]

i think this design was based on the Commer TS3 Two Stroke that had 2 pistons per cylinder and was a two stroke diesel.

[@alejandromartinez-rf4qp]

Sonido inconfundible. Leyland, el mejor motor de la historia.

[@SteamboatWilley]

Fascinating engine. I've seen models of Doxford engines before, but they only have one crankshaft (with really long connecting rods going down the outside of the cylinders to connect the top pistons to it), whereas this has two crankshafts. It makes me wonder how the top crankshaft is lubricated?

[@christopherhampson265]

Slightly late response !!!!! The engine is a dry sump . Remote "tank" and oil pumped to where it's needed , then recirculated back to the "tank" and then into the cooling system and then out through the exhausts 😁😁👍👍👍👍👍👍

[@GingerPhilG]

@glazerguy58 - of which you're a classic example, my friend. If you also look up the Napier Deltic and the Commer TS3/TS4 "Knocker" 2 stroke diesel, you will find they also, as well as other engines use the same 2 pistons to one cylinder configuration

[@allistairc123]

the deltics must be vertical oposite instead of opposing?

[@Mk1Male]

Doesn't scream like the Chieftain engine. That was an awesome sound 😲

[@allistairc123]

@Alembic25 i know that, thats why i posted it, because its out of the ordinairy. i also saw a great animation of the deltic. google image it to se emoving animation. its all these other muppets that dont know what it is

[@allistairc123]

@rotax7804 you need to click the reply button so the person gets notified

[@gaudeamus66]

@benhanson3 Leyland graduate explains: six cylinders with two crankhafts, one at the top, the other at the bottom. Two sets of six pistons and con-rods opposed to create, in effect, two six-cylinder two-stroke diesel engines geared together without cylinder heads. The combustion space between the cavities of closing pistons leads to high-temperature combustion for multi-fuel applications. N.B. also the Coventry Climax H series and Rolls-Royce K series engines. Visit the Tank Museum in Dorset.

[@allistairc123]

@hoplite46 yep

[@RiceReaper]

Its an opposed engine. It using two pistons colliding together inside of a cylinder head for compression. Look it up on wikipedia. I think theres a nice diagram

[@matgonjinn]

That is one angry sounding engine. I can honestly say the best sounding engine I've ever heard as of now.

[@skylined5534]

Yes sir!

[@allistairc123]

yep, sure is

[@BIGTAZ351]

@benhanson3 Fairbanks-morse had a simular concept...ports top and bottom, 2 crankshafts...the 2 pistons meet in the middle for the comprssion. works pretty well. look up opposed-piston engine on wikipedia..they have pics.

[@abanyai123]

WOW that's a beast!

[@tpvalley]

2 crank shafts, 2 pistons per cylinder, inlet ports are covered/uncovered by one piston exhaust by the other- opposed piston- pistons move toward and away from each other- a 2 stroke, see fairbanks and morse.

[@allistairc123]

no, they have crankcase oil and the fuel does not enter this area

[@mosipd]

Seems like is has excellent throttle response..

[@allistairc123]

@glazerguy58 i am struggiling to understand what you are saying or meaning, can you string a sentance togeather?

[@jools182]

I understand the concept but always wondered if it was possible to have high bhp and low torque? Or do they go hand in hand?

[@allistairc123]

yeah, it did, but any information i found for it on the internet said it was 750 :)

[@KingOfTheClutch]

@joffeloff Holy Shit, I always though Wärtsilä was a German make. you learn something new everyday.

[@allistairc123]

wow!!, i just googled the deltic... what a mad engine!!!! 3 cranks!!

[@EngineManic]

@benhanson3 2 pistons per cylinder they come into compression with each other

[@tpvalley]

Fairbanks and morse engines were also used in locomotives. Other opposed piston engines r made by - Doxford, napier deltic, harland and wolffe, Burmeister and wain...

[@rbagel55]

I think you Brits have the best tank because they chose to stick with a Diesel engine with the Challenger. I was in US Army for 4 years, when we got the M1 Abrams, they had to get Air force guys to work on them. The turbine engine they have guzzles fuel like mad, and wer'nt very reliable in desert storm, a lot of sand ingestion problems-they should have stuck with the Diesel, leave the turbines for aircraft

[@destroyerarmor2846]

Nope, Turbine is fine

[@Real_Claudy_Focan]

@@destroyerarmor2846 LOL ! Everyone stopped using them ! Russians only use them for their arctic battalions since they start easier in the extreme cold, that's it ! Best powerpack in the world right now is the MTU883

[@destroyerarmor2846]

@@Real_Claudy_Focan big diesels are too loud

[@skylined5534]

@@destroyerarmor2846 They're not though. Turbines are quiet? Lol.

[@allistairc123]

@mlnhead1 dont understand your question?

[@allistairc123]

yeah, i was thinkin that imagine the look on other drivers face when ya revd it at the traffic lights! lololol

[@helisteam]

I used to repair these when I was in the Army Cheiftan MBT

[@edgybrah9519]

Look up Achates Power, they have developed a modern opposed piston two stroke which seems a World beater.

[@DrFruikenstein]

@theseeker15 The engine I call "3 in 1". I've never seen one. Here in the U.S., G.M, and G.E. pretty much power almost everything on the rails, but one day I'll get to the U.K. and find a R/R museum, and get up close, and personal with a Napier Deltic.

[@tpvalley]

does it have spark plugs and injectors, or does it allways use diesel as pilot ignition, if it uses the otto cycle (spark) does it not detonate on petrol? comp ration being very high, or does it burn 140 octane?

[@ashley118118]

lovely engine

[@allistairc123]

its the big plate flywheel ringing from the starter motor kicking it

[@tomgauntlestrange]

all this engine needed was more development and funding to increase its output and reliabity

[@johntrevena4280]

true... I typed the same!!!!

[@fiat850super]

Put that engine with in a puller! Great sound.

[@allistairc123]

google it!! i deliberately titled it this way cause that what it has!!

[@allistairc123]

i wonder does he know how popular this vid is? u should mention it to him next time u see him!

[@BeamerTheFox]

damn sounds like a 12v71 has the same decellarate wine they have

[@Diesel8290]

Baylan Maverick Legacy that’s probably the supercharger whine your familiar with, as both engines need them to run

[@johntrevena4280]

yes 12-71 balls n snarll !!!

[@DrFruikenstein]

@theseeker15 Thanks for the tip. When I do get out that way, I'll try to make it around Halloween, so I can also see Whitby at its finest as well.

[@allistairc123]

eh? why, the ring it makes starting?