Working view of 2 Stroke Opposed piston Engine

[Renwysocki]

This engine is very interesting.

I heard there projects in 2012. for such an engine is manufactured.

Congratulations for the video.

[whitehd01]

very cool

[ricardojp07]

have your see the diesel motor 2 strokes by ricardojp07, pls check it.

[workensmart]

That's a big Supercharger at 1:06

[marklandynut]

@workensmart Its not actually a supercharger. 2 stroke diesels like this can't draw air into the cylinder so they have blowers to push it in and at the same time push the exhaust gas out. Port timing means there's only about 1.5degrees of crank rotation where the inlet port is open with the exhaust closed, so no chance of getting any real boost. In fact, if the manifold pressure goes over 6psi the exhaust ports are getting clogged and the engine needs a decoke!

[workensmart]

@marklandynut Oh okay.

[ppsuperswede]

here in the U.S., the closest things we have to these wonderful engines is the Detroit (GM) Diesel. The similarity being the two-stroke design and that's it. From what I can tell, they sound similar. That is about the thing I want to do most is HEAR one of these things going along. I understand they make quite a singular report. But boy I sure wish I could hear one of these in action. Where and why would there be a TS3 in the States? Were any imported (exported, from "your" point of view)?

[marklandynut]

@ppsuperswede Have a search for TS3 or Commer Knocker, there are plenty of vidoes of the engine and trucks. It does sound a bit like a 3-53, only more frantic. The nicest sounding one is the TS4 prototype which is also somewhere on Youtube. Such a pity it never made it to production. As far as I know the engine never went Stateside, only UK/Europe and Austrialia/NZ. The other one to search out is the Foden 2 stroke. The 6 cyl version (FD6) makes the straight 6 Detroit sound bad.

[CaptainBig8IIIIIID]

so whats gonna happen when this technology becomes standard in medium and heavy duty trucks? god id hate to be working for Chrysler then lol

[justlooking2468]

I expect the firing order would be 120' apart for even running but each pair of opposing piston is only one actual cylinder with one piston uncovering the exhaust while the other one uncovers the scavenge /inlet port. Would give it some interesting rocking couples with opposite ends of the engine firing pretty much diametrically. A lot of engines have balance shafts in them for that reason. I am glad that you are all enjoying this vid.

[dl500b]

@justlooking2468 If this is a Rootes Group TS3, then it has only the one piston per cylinder.

[marklandynut]

@dl500b This is a TS3 and it has TWO pistons per cylinder, one inlet piston and one exhaust. The pistons are operated on those rockers from a common crankshaft. It is based on a Sulzer design and works on the same pricniple as the Junkers Jumo and Napier Deltic engines amongst others. do a search for "Opposed Piston Engine with one crank" to see a pretty good animation of the engine.

[peppersdog1]

@dl500b it has two ive worked on many of these engines

[NearAbbeyRoad]

do a youtube search on Rootes TS4. Awesome.

[NearAbbeyRoad]

I believe quite few of these engines are still running and fitted to boats. They are to be seen a truck shows in immaculate Commer trucks. You know by the wonderful whining sound. It sounds like a turbine.

[mbopm]

Rocker arms

[ChargerMiles007]

Man that is one unusual engine!

I thought the contraptions I build are different, but this thing takes the cake!!! :)

[tpvalley]

its a commer engine, the crank is at the bottom in the middle.

[NearAbbeyRoad]

@tpvalley

Crank is seen turning slowly at 0:57 at the bottom. The rocker boxes are off to show it working. Neat.

[yevadyllis]

Superb!

[DanFrederiksen]

I assume it wasn't on but was spun by other engine? that might be worth mentioning in the description..

[cpmcintosh1]

@DanFrederiksen

hhhmm think that was obvious given the exposed innards might not you think

Anyway fascinating vid many thanks

[justlooking2468]

@DanFrederiksen I think the old Ronaldson Tippett chugging away at the start would be enough.

[spentacle]

Lovely. Usually known as Commer TS3 or Knocker. First time I've seen the ports exposed. Used to be a passenger in one, noisy bastard but good power to weight ratio.

[io9487]

Great Engine! Thanks for posting! Is it fully balanced? Does it still run?

[Xx69roadrunnerxX]

Amazing vid!! Mechanical art. 

[justlooking2468]

In reference to the asymmetrical timing, I think a lot of empirical engineering was used ( keep trying till it works or doesn't break!) unlike modern CAD designing Thanks for comments

[betamale3]

@justlooking2468 - arent the 3 pairs of pistons firing 120 degrees apart, which would make it symmetrical?

[realvanman1]

@betamale3 Yes.

[joedrummer2010]

THIS IS SOOOOOOOOOO COOL!!!!! THANKS FOR POSTING! FAVORITE!

[goinghomesomeday1]

Poetry in motion - just beautiful.

[MrSoulwound75]

Neat! I am a machinist, and am always amazed at how the mechanical technology of the early 20th century is still in use today. It truly shapes our world. I think folks were much better at math back then! I believe those engines are assymetrically timed. Had to be interesting to design!

[NearAbbeyRoad]

@MrSoulwound75

The TS3 2-stroke diesel dates from 1954 - 72, fitted into a truck. A high power/weight ratio and fuel consumption twice a less as other comparable engines. US Chrysler bought Rootes who stupidly ditched the engine so it would not compete with their existing 4-strokes. Rootes developed a 4 cyl TS4 - Chrysler ordered all to be destroyed - like they wanted to air-brush this gem.The engineers hid some. One in NZ has been brought into use and maybe in a truck. The TS-3 sounded superb

[NearAbbeyRoad]

@MrSoulwound75

It was based on the German Junkers engine. It is superior to modern engines, yet Chrysler got rid to promoted inferior products.

The designer was still alive a few years back and amazed he was contacted by a NZ group to bring into life one of the TS-4 prototypes than never made it to production. he was flattered people were interested in his designs after all these years.

If Chrysler had kept the engine and improved on it as time went on, it would dominate the market.

[marklandynut]

@NearAbbeyRoad I don't think it was based on the Junkers. I think it was actually based on a Sulzer design which had the same single crank and rocker arrangement.

The TS3 is just 3.3 litres and produces 120bhp and 240lbft which put it head on with 8-10 litre 4 strokes in the 50's & 60's.

[douro20]

A Rootes-Lister TS3. Perhaps the only largely successful opposed-piston automotive engine. Makes about 105hp at full throttle when fitted to a Commer truck.