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Ita all worthy of pics mate, dont be shy in taking several, no matter how trivial the part. Im still here watching ;)

The "propane" aspect cant be the case here as the stuff i use is liquid form and used in a "pump up" type spray can. Very eager to evapourate, i suspect as mentioned some sort of ethlyketone or similar, as for being "non flamable" Deanofid, The stuff im using is probably amongst the most...

I dont think price comes into it when you are burning it in a model, its not going to use much. My thoughts were that you could make a model with 18:1 compression ratio and use compression ignition instead of spark, obviously there are other fuels out there but i have brake cleaner in plentiful...

In full size practice you can start and run a diesel engine by spaying brake cleaner into the inlet manifold. The speed of the engine very much depends on the amount sprayed in. I wonder if such a fuel could be used in model practice through a carburator or similar, using compression ignition...

did you ever get this running? i have one of these at home on a two wheeled garden tractor

absolutly outstanding!

Coming along nicley! watching with great intrest

All good feedback im sure, it will all be put to good use in prehaps modifying or adding drawings to help future builders

Ive got a bit of 5 series titanium at home, we used to use quite a lot at my last place, not dissimilar to duplex to machine, very abrasive in my experience, but easy to get a good finish and size with. As for pistons, im not sure any benefits could be had. But for connecting rods and other...

def not! we all have faith here with you! get machining, and dont forget the camera! :big:

yet another intersting project i shall have to keep an eye on!

Amazing attention to detail here, i just wish i had the time and pateinece for a model like this

Absolutly amazing, watching every step of this. cant wait to see it run!

Of course, the twin pistin is in fact merely a "non return valve" that also allows for some ammount of resistance before opening so a car running a metered air system does not leak metered air when on part throtle (causing running/fueling issues)

Here is a rough sketch i drew up, i hope it conveys the idea of what needs to be achieved, thanks

lol, ill be back at work tommorow, then i can get use of the scanner and all will be clear!

its all down to hole size, shape and position, trial and error will prevail with the perfect sound ;)

very nice, loving the crank!

ok, i will do a sketch and post it for you, i will ommit the "one way, or twin piston" as this will not be required with the map sensing management, thanks chaffe

Very nice little engine that, from what i can see the spark plug is in the cylinder wall, pointing upwards on the opposite side of the engine from the manifolds. Of course it could be a diesel?!