Does anyone know just how efficient Pyro Comps are?

[DCflyer]

Particularly the Pyro 850 competitions?

I'm on the fence about pinion choice for a 14S 770C build. I'll def tach the heli and have both pinions available, but i'd rather go with a smaller pinion if I can to keep the heli "torquey".

Being as the competitions are hand wound, i'd imagine they'd be between 92-95% efficient. Ideas? Thanks.

[Wh1teAfr1can]

Originally Posted by DCflyer

Particularly the Pyro 850 competitions?

I'm on the fence about pinion choice for a 14S 770C build. I'll def tach the heli and have both pinions available, but i'd rather go with a smaller pinion if I can to keep the heli "torquey".

Being as the competitions are hand wound, i'd imagine they'd be between 92-95% efficient. Ideas? Thanks.

The main difference between the regular pyro and the competition is the efficiency at different amp ranges. The normal one has smaller wire so it is more efficient at lower current, but not at higher amps due to current capacity of the smaller wires. The Comp has larger wire and is therefore more efficient at higher amps this comes with a price as the heat generated at higher amps is greater, but the efficiency is still manageable.

for example(not real values):

pyro 850 operating at 50 amps and say 92% efficient. this means that 46 amps is being turned into power the other 4 amps is being turned into heat. while its ok in the lower ranges typically all 3D as the general amp requirements are low there are few sustained large amps loads. If you were to take that motor and attempt to run it at say 200 amps continuously in a speed run its efficiency would drop drastically to say 70% which is 60 amps being turned into heat which the motors fan would not be able to handle.

pyro 850 comp operating at say 200 amps continuously (~5-10 sec) while it is say 90% efficient that is still 20 amps of power being dumped as heat, which is manageable by the fan for a short duration.


The normal pyro motors are wound on a machine that winds them as good as hand winding could for that size wire. The trick is that it can only wind the wire so big. The hand wind is required when the larger wire is used in the same space.

[DCflyer]

Thank you for the excellent explanation Richard. So its basically a tradeoff - not necessarily one motor is more efficient than the other in every aspect.

So would the Comp's be less efficient than the standard Pyros at things like low headspeed flying? Nothing crazy, but say 1600rpm on a 770-800 sized machine.