JustPlaneChris wrote:
That's too weird about the XNova running that hot, Alex. What timing and PWM are you running on them?
Well I tend to keep it loaded 100% of the time if I'm in a mode of going all out. Which doesn't help.
I have a couple of diff setups running. One is with a Kosmik 160. Default was with dynamic timing. Which had constant current and thermal shutdowns. In Kontronik land I guess 160 = 120? Anyway I switched to 16 fixed which dropped the kosmik FET temps by 20C and stopped the constant warnings in the log. Motor is as hot as my other setups. It reports peaks of 300A which I find hard to believe.
I also run the same motor on castle 160's, medium, 8khz. Similar high temps.
Now don't get me wrong. I think the cooling fan is better in Xnova vs say Scorp. But there is no magic imo. They are capable of draining the packs just as fast as any motor.
On the 700l I run a 13T pinion, and 110 main. The heat generated in back to back flights is enough to strip the gear easily. So I need to cool it with forced air. It's a 4530-500. On the g700 setups it heats the mother plate sufficiently to generate similar issues where the pinion main gear can strip if not cooled. Adding the heatsink mount helps a bit, but cooling between flights is still needed.
If you guys are interested I can post the castle and Kosmik logs to review the real data. Might be an interesting topic.
Oh and on one g700c I run the metal main gear. It's nice, but very noisy. In a good angry way. It's down to razor blade teeth after about 70 flights so time to replace it. It's not a cheap main gear and pinion set. I think $60? But at least there are fewer surprises in flight. It's a nice option to have.