earlwb

I have just been running my Drone engines using Davis Diesel development diesel fuel. I add a little extra castor oil to the mix though. They run Ok like that. I don't think that there is all that much difference between the suggested Drone fuel and the normal commercial diesel fuels we have today.

Way back then some of the control line flyers would fly their models enough to actually have the engine wear a oval shape into the main bearing (bushing) on the engines. All that ether would of course strain the engine during combustion and force the crankshaft down harder. That prompted the designer when he came out with the second model to add a large ball bearing to the engine to help minimize the wear. Now of course this was the competition flyers who could easily put in 20 hours or more flying during a week. So they were really racking up some serious time on their Drone engines. Thus the Drone engines were pretty tough when you think about it.