Heat problems!

[tobbe]

Aaah the sun i shining and it is about 10 degrees Celsius outside. A time for me to take out my B4 for a ride after a loong nasty cold winter! Put in a charged battery and off it go! Damn it was fun driving it. But after about 10 mins. it suddenly shut down. The ESC (Novak GTB) was extremely hot (I burned myself on the heatsink) the temp-shut down probably got on because after while it worked fine again. I don't have any fan because the original one broke and it's a very tight fit under the body! What should I do to prevent heat building up? A fan may work but it's as I said really a tight fit! I have a 6.5R motor geared 17/81 so it should be fine. Should I cut some holes in the body to make a better air-flow? Any ideas? I must do something because it would probably don't even work in the summer when it's around 20-25 degrees Celsius