thanks dave, that's exactly what i was looking for. 100hrs does seem high, but my motor went through a chicken dance, idle-up style. lol. i'm a file farmer by nature, so entering detailed post-flight data is strangely enjoyable for me. however i don't know whether i'm ocd enough to log repair hours too.

i prepared for the scorching weather by hacking cooling holes in my 4n1 and canopy and adding heatsinks, but the motor did have badly worn brushes (9T, symm blades, stock lipo). i figure 100hrs is not happening with the weather we've been having lately. regardless, i think i must've underestimated the 5hrs and it's more like 12hrs now that i'm thinking about it (flown ~1.5mo, average 1 flight/day). since it varies so much, i'm going to try and use the drop in headspeed to indicate the need for replacement.

lol ct420, 101F after 10p! ***it!!! and i thought i was getting cooked, jeez.

dave, i lived in Ann Arbor, MI for 4 years. i know exactly what you mean about the humidity. the 98F/100% humidity i experienced in MI when the AC went out felt more miserable than any 110+F i've dealt with in CA. i needed a cold shower every hour. my sleep was limited to 2hrs between showers. no exaggeration here, that humidity is pure misery.

i've had my worries about heat related failures, but i have successfully flown in 113F under the afternoon sun. my canopy has been slightly warped ever since, but it was well worth it. maybe i can make up for the $$$ in fried motors by charging my buddies to hover over their heads for a minute. no more freebies guys, pay up.

edit: since we're on the subject of flying in extreme heat, has anyone measured the temperature of their lipos after flying in 110+F weather? i might add this in my flight log when it's hot out. i hope i don't find my packs near critical after landing in such heat. btw, what is the max safe temp for lipo cells?