Hello Fellow Tankers!

Finally got around to doing some testing on the motors. I tested the white endbell Suntechs, the black endbell and Graupner Speed 400s. Ran them each outside of and then hooked up to a newly broken in gearbox with a Tiger sprocket. For measuring volts, amps and watts I used my [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXLMV0&P=ML]Watts Up Meter[/link] and for revolutions one of these .


OK, battery is hooked direct to motors in all tests, it was a freshly charged Venom 3600. Did not have the ability to supply exact voltage via a rheostat and didn't feel like opening up a running tank for these tests, later.

Suntech white endbell motor by itself:
.25A 8.33V 1.9W @ 11079RPMs

Black endbell motor by itself:
.49A 8.25V 3.9W @ 16200RPMs

Graupner Speed400 motor by itself:
.50A 8.16V 3.9W @ 18500RPMs

Now each motor was hooked to the same just broken in with toothpaste gearbox - dry. RPMs were now measured against a Tiger sprocket, not the pinion.

Suntech white endbell motor:
.45A 8.16V 3.9W @ 268RPMs

Black endbell motor:
.64A 8.09V 5.0W @ 380RPMs

Graupner Speed400 motor:
.73A 8.05V 6.5W @ 439RPMs

Final test was to add some Penn Reel Lube to the gearbox to lubricate the gears.

Graupner Speed 400 motor:

.58A 8.02V 4.7W @ 443RPMs


So what motors are the white Suntechs and black 385s? I think we need to regulate the voltage to replicate the specs right?