Quote Originally Posted by njhussey View Post
Most model ESCs are mounted where there us some airflow (the ones I have in my planes all have air ducts directing air onto them and the one on my Trex 500 heli is on the side so in the downdraught) so I'll be putting a 24V fan by mine for cooling.
A fan does make a big difference to the ESC (not ESP! ) temperature - I put fans on the ESC(s) in my model car for the same reason. A lot of model car ESCs include fans now since the airflow tends to be poor in that application.
Bit off topic, but is that a genuine T-rex or did you get a cheap copy? I got the latter, but can't say I've used it much yet as I always seem to have other things to do...

How much did all those springs cost?