Having unearthed the notebook and deciphered the LSD doped spiders death convulsions that seems to be my natural handwriting style…
Engine: ASP 0.46m
Fuel: Methanol 70% Nitro Methane 5% Oil 25% SG=1.1
LHC Methanol: 726kJ Mole
Air/ Fuel Ratio: 7 to 1 Air to Methanol = 4.9 to 1 (call it 5:1) Air to Fuel
Idle 2,000RPWM Peak 4,500RPM Use 4,000RPM
Energy = (4,000 x 7.5 / 5) x (0.7 x 726) / 60 = 6,000 x 508.2 / 60 = 50,820
Assume 9% Thermal = 0.09 x 50,820 = 4,573.8
Usable power 25% = 1143.45 Watts (manu specs say 1.2kW!!!)
spent through exhaust 50% = 571.7W
spent as cooling 25% = 285.8W
tractive power 25% = 285.8W
Torque convertor ratio 4.2 : 1 therefore tractive power to gearbox = 68Watts
Tim, most of my electric locos use 12 Volts at 5 Amperes, (the NER EE-1 uses 20A -but then it has 6 Motors). If you like I can do the calculations for you based on the dynamo design that I used for the Heiilmann Steam Electric loco.
regards
ralph