Webra Series III Piccolo 0.8cc

It is a really neat engine. How does it run?

anm2 wrote:It is a really neat engine. How does it run?

It is a very easy starter but, as a diesel, needs a little bit more ether than the standard mix that I use to run at peak. It also needs a good clean after a run as it is prone to the castor oil gumming it up COMPLETELY! Not just piston and liner but crankshaft as well!

It is better than the DC Merlin but no where near the PAW equivalent but much lighter!

ian1954 wrote:

anm2 wrote:It is a really neat engine. How does it run?

It is a very easy starter but, as a diesel, needs a little bit more ether than the standard mix that I use to run at peak. It also needs a good clean after a run as it is prone to the castor oil gumming it up COMPLETELY! Not just piston and liner but crankshaft as well!

It is better than the DC Merlin but no where near the PAW equivalent but much lighter!

Do you mix your own fuel or do you purchase it? If so, which brand do you use or recommend? Have you ever run a cox engine with a diesel head? Don't mean to bombard you, but I am considering running one on diesel. The only fuel I have seen for it, is from Davis Diesel. Quite expensive from my standpoint. Thanks for any info. Andy

The standard mix I use for 1cc and bigger is:-

30% ether
30% castor oil
38 % paraffin (Kerosene)
2% nitrate

under 1cc I increase gradually to 40% ether reducing castor oil at the same time. The Webra and the Cox 049 conversions I use 35% ether. The higher ether content runs cooler and I have found that the Cox conversion heads run better with this mix.

The Valentine TD 049 conversions run more than happily on the standard mix but they have been built using a new cylinder with a proper contra-piston. They are self contained diesel conversions and not just a modified head.

The modified heads work well but need quite a bit of patience sometimes to eliminate leaks. Diesel fuel in the UK is more expensive than glo but a tankful lasts longer and I am addicted to the smell!

In the UK, I use SMC fuel but modify the mix as required.

https://www.coxengineforum.com/t4757-mccoy-duro-glo-049-diesel#62225

This forum is a good site to get your questions answered so never be reluctant to ask. There are experts in every field.

Thanks. I have several valentine engines, but non are Diesel. I did not know they were not conversions. That is good information. I have never run a diesel, so making it simple is best. Right now, I have a conversion head, I just need the fuel. Davis Diesel sells 1/2a diesel fuel, I will probably go there. Thanks again. Andy

See this

https://www.coxengineforum.com/t4347-valentine-049-engines#58145

Thanks. I need to spend more time searching the topics already covered. I am not sure I would have been looking for this one. Glad you pointed it out.