I am using this motor in a beat up old Pike Perfection I bought after it had been rebuilt. I bought it as a glider but cut the nose off and put a Mega 16/25/4 F5J motor in and initially used a 3 s battery pack . As it weighs 2200g it was fairly leisurely in the climb (as you might expect). I decided to see if a 4s battery would fit and found a Tatu pack that would fit in nicely and not alter the cg too much. The prop is a Vitaprop 10" x 6" . I have not got a height limiter in it because it (Jeti Mvario2) is being used to get the temperature of the case into the telemetry system then the Transmitter talks to me every 5 s to tell me what the case temperature is. The 10"x 6" fairly wizzes and the model pulled hard and gave a reasonable height on a 30s motor run. I think it was over 200m. The temperature started at 29.5 ° C (warmish autumn day) and rose to 73° C about 15 s after shut down. I would think that being an in-runner the inner temperature would be considerably higher. After about 8 mins flight the temperature was down to ambient again.
Can anyone tell me if this is safe? Because I am thinking about moving the set up to a new fuselage I bought and I would like to use this set up and save myself a bit of dough.
Cheer, Paul

I use the Mega 16/35 3CE F5J motor in my Aspire's for F5J and ALES- but I run on 3S 1300 70C and 13x8. 3 years of hard contest flying and never had an issue. I've also never set my Jeti to monitor temps, so I don't know what my exact numbers are, but at the end of a 10 minute flight, motor and battery are at ambient temps. You should be fine, in my opinion.

Jean

Thanks Jean, another friend said about the same thing, so I'll stop worrying

Just did some tests this weekend with my ultima 1 heavy (1.5kg) running mega 16/25/4 on 4S and spinning 10x8 aeronaut. It gives me over 33m/s ground speed in level flight and about 20m/s ground speed at 7m/s climb. Good enough for any wind.

I'm using mega motors exclusively for more than a decade now and never had any issues. And we did abuse them in the past - think 16/25/2 on 6S pulling over 100A. Very reliable motors.