Hi guys,

Yesterday I tested ethanol with 25% castor, no nitro and got:
2800 rpm idle
10800 rpm full throttle

Engine is a 40LA with a 10x6 MA. The plug is an A3, almost new (1 flight).

Here ethanol is sold as car fuel, it has 4% water and some gas. The gas just to become undrinkable.

I think the idle is some high, but the full is satisfactory, only 200 rpm below than with a sports Byron (10% nitro). The engine needs some "warm up", otherwise if you give full throttle right after start, it dies. The needle become more sensitive, I think because no nitro was used. The transition is OK, but rougher than Byron.

I was conservative putting 25% castor, I know that the mixture must be leaner for ethanol, so less fuel, less oil... Surprinsingly, no need to turn much the needle, just the normal range for methanol. I was expecting 50% difference in mixture, but the engine started at first flip and no need to keep the glow driver. Does somebody have a guess ?

By the way, does somebody know the temperature readings for the engine at the head ?

Regards