RE: Article about Castor Oil in R/C Report
I have run lots of straight castor fuel, a fair amount of straight synthetic fuel, and have settled on blended. I think striaght castor does run gummier than straight synthetic. but synthetic seems less forgiving of hot runs. A few % of cstor seems to be the ticket. I did get some synthetic fuel for some ABC engines I am running, just to see if there is any difference.
You also noticed Brian's comment about good grade of castor available here.
As for Castor and WW1 pilots running for the bathroom. Well I doubt that breathing a snoot full of synthetic oil would have been a lot healthier!
Note he recommended 25% sytnthetic oil & 30% nitro. RUN PROPERLY (ie NOT lean) this will actually yield a lot of power on a richer (and cooler) needle setting. Run lean and it will get VERY hot and nasty on engine parts!