RE: MVVS 15 diesel DFSR-RC
When testing the DFSR engine (iron cylinder) I had following results:
8x4 MA prop on 4.5mm venturi and 16740rpm; on 3.7mm venturi 16100, on 3mm venturi 15300
9x4 MA on 3mm venturi 12400 rpm
9x5 MA on 3mm venturi 11500 rpm
fuel is 20% oil, 40% ether, 20% Wynn's diesel+, 20% kerosine .
Kerosene is Farmlight lampoil (paraffin C5-20, flame point <61°C). Good kero is critical.
muffler used in test is MVVS #3241. This muffler is to be removed after running to prevent cylinder/piston corrosion. (unhook spring, detach muffler)
The Wynns diesel+ stuff is mostly kerosene with 15% cetane enhancer. (Amsoil has the same stuff at 100%). It was mixed in at 20% to get 2% enhancer in the mixed fuel. Without it, the engine would hardly get over 12000 rpm using an 8x4
Using two drops of fuel in the venturi, I had first flip starts.