Hi Dennis,

I think you misunderstood the post re: Hacker motors. The post was talking about a smaller Hacker that did not have the adequate ball bearings we need for our ECL. The Hacker motors in our normal ECL size range (40 and 50 series Hackers) have large ball bearings and are excellent for our ECL use. This is also why we find the larger Hackers, and some others, are a little heavier. I feel the extra bearings are worth the small weight penalty. .... Your milage may vary. ;-)

RE: "rated to 392F" ..... This is what happens when you have the "Marketing" dept. writing the specs rather than the Engineering dept. LOL

Here is some info on Temps for our ECL motors, this is from a prior post I made:

6. Yikes! "400F" .... This may be the temp when the magnets stop being attractive to each other and file for divorce, but it is about 260F higher than the MAX recommended temp for our motors. Most Mfg. recommend a MAX operating temp of around 135F to 140F. If you operate above this level your motors life span will be shortend, the magnets will weaken, and the motor will lose power over time. As we approach 170F to 200F the motors life span will be as low as <50 flights. As we go over 250F we start to run the risk that the glue holding the magnets may begin to weaken and fail.
   I know that the E speed pylon racers cook a lot of E motors(and batteries) by running at very high temps, but they are going all out to win and look at motors like we IC pylon racers look at glow plugs, one or two flights is SOP.

FWIW When I give you my motor temp readings, they are actual in flight readings from my on board Eagle Tree data logger with a temp probe attached directly to the motor, and one probe to the battery. This unit also gives me real time RPMs showing the changes every 1/10 sec during the entire flight and for each maneuver. it also gives me Watts, mAh, av. and mins/maxs for each flight. It's a cool tool. :-)
  
BTW: A good rule of thumb recommended by the motor mfg. is that you should be able to touch your motor right after a flight without any pain. If you can't hold on to your motor, it is too hot. This is also the same rule of thumb for our batteries. ..... Our batteries actually like to be a little warm for MAX efficiency. Somewhere between 95F and 110F is where they are happiest and at max power. but they too are sensitive and should not be run at over 130F, or their life will be shortened. 

Alan,

I am interested in the E nobler information - what battery pack are you using with the 3020, ESC, Timer, RPM & prop, line length and flight time?

Best,       Dennis