Dieselised Cox Engines

I am still plugging away at this and I am getting closer to satisfactory results. Not there yet though!

I know a lot of people have sent me fine examples of dieselised cox engines ( What is the plural of Cox? Is it Coxes like Foxes?) like the Davis Diesel conversions but I have tried them and they don't meet my requirements. Performance and fuel economy.

Through quite a bit of testing, it has become obvious to me that a straight head conversion eats diesel fuel and it has to be balanced with alterations to the venturi size. This is trial and error.

I have it sussed for the TD 049s and Medallion 049s but the Bee (reed valve) is still work in progress. It is easy to flood a Bee with disastrous consequences.

It isn't only the crankshaft to be worried about!



The missing broken con rod in the photograph also took the crankcase with it! I can't remember what I did with it or I would post a picture, it poked a hole through the side!

Anyway, I have progressed with the TD and installed an RC carburettor. Still needs a but of fine tuning but diesels tend not to like RC carburettors but this one is promising.



Now for the Bee. This runs and starts well but is still drawing too much fuel. I need to restrict the venturi but, one step at a time, too many changes in one go makes it hard to troubleshoot. It will be easier now that I know the engine is a runner as is!



The wooden mount I used is not very secure. I now refer to the engine as the "Wiggly Bee" (see video!)