MPI MAXX

MARCEE Minnesota Area R/C Electric Flight Enthusiasts

MPI MAXX #MCC345 Cermack 1.6 / 2.1) Gearbox

Setup Speed 400 / Dymond MAX 48 Recommendations and test results;

By Irv Cooper: Revised 5/3/99

If you do not buy them with the ball bearings, put the ball bearings in yourself (The bushing version is very ineffiencent unless you lubricate them for every use)
If you decide to run them without ball bearings - re lubricate every run. It makes about a 15% difference in efficiency. Plus those little bushings do not hold up more than a couple of runs without fresh lube each time. Particularly make sure you get some in the bushings and on the thrust faces of the bushings. I have found the spray lithium grease works pretty good and is easy to use.

5/3/99 Revision - The little phillips head screws on each side that hold the gear box together have a tendency to work loose. This puts undue stress on the bushings and the gears. I recommend that you remove the screws and add a dab of locktite or slow set ca and reassemble (One screw at a time)
Reverse the gears so that there was not so much cantilevered load on the motor shaft and so that the
load was shared better on the output shaft bushings.I did not tach it, but thrust went up and amps went
down for this change also.


Out of the Package Configuration	As Modified

If possible use a collet prop mount directly on the output shaft and avoid using the prop adapter as it cuts way down on the cantilevered loads on the output shaft and propeller side bushing or bearing. This also allows you to use the ground flat on the shaft to hold the output gear instead of the propeller adapter.