Working view of 2 Stroke Opposed piston Engine

Saw this at the Mount Gambier show and had to share.
Some good views of rockers and scavenge blower and a sticky in the inlet showing the piston working plus the injector shooting into a glass jar.
As a kid I remember the sharp bark these engines made at full noise. Apologies to anoraks who want to know all the details but it was hard to hear the chap at the engine because of surrounding noise.

Category:

Autos & Vehicles

Tags:

• knocker
• 2 Stroke
• Rootes

[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.

[DanFrederiksen]

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

[justlooking2468]

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

[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

[whitehd01]

very cool



[ricardojp07]

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

[peppersdog1]

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

[workensmart]

@marklandynut Oh okay.

[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.

[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!

[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.

[dl500b]

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

[workensmart]

That's a big Supercharger at 1:06

[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)?