Pilots,

I think the main problem with these starter motors is that the brush assembly can not stand up to the 25 to 35 amps that it draws when starting our turbines. Lets say you have just peaked your 6 cell ECU pack-and you push the start button-that starter draws around 25 amps on a Ram 500-a R1000 even more-and it has to run for at least 10 seconds-depending on your fuel ramp setting-if you look at the brushes when its starting-there's some SERIOUS arcing going on-the brushes are being burned away.....the speed 300 electric motor (this is the motor used on most turbines) needs a brush assembly like the ones used on the R/C car motors-carbon/copper matrix brushes (spring loaded replaceable) with the wire lead embedded in them-and ball bearings. This would solve 95% of the starter motor problems. Remember that 8 volts at 30 amps =240 watts of power-that is almost 1/3 of a horsepower and a LOT of heat. Look at your starter sometime-looks like a arc welder in there.

Jackjet