Ralphw
Key Veteran
Location: Spring, TX
| Those flight times do seem a bit low. Are the packs new...if so they may take a few cycles to reach their max potential. As for the heat, I fly a C40-8L with a 17t pinion on Li-PO (3s4p) for 15-20 minutes at a time with no serious heat issues.
A couple of things come to mind that might have an effect...make sure that you have everything running at it's proper tension. If you over-tighten the T/R drive belt you can create a lot of drag (a little loose is better than a little tight), which in turn will reduce the flight time and add heat at the motor. I also use a lube (TriFlo) on the mainshaft and T/R shaft to keep them nice and free. Another area to check would be the throttle curves. If you are using a low value (less than about 80%) at hover you're not keeping the motor in it's optimal power range. End result....low flight times and higher temps. I use the 8L with the 40-3p (BEC version) and fly in the GOV mode at 90% on all points in Idle-Up 1 and 2. For normal I use 0/15/90/90/100, and I use that mode only to spool up or shut down.
Hope that helps!!
Ralph W.
"Life's Short, Fly Fast"
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