RC-Monster Forums - View Single Post - Lehner 1950 or 2230 with 5\6s and an MGM Compro 16024?

Finnster · 11.09.2006, 11:11 AM

Sounds like the upgrades should be really fun and will smoke your nitro buddies :)

One thing tho I wouldn't do is put a heatsink and fan if you get the 1950. If you've ever played with mounting heatsinks on a CPU, you will find that the HSFs need a ton of spring force onto the CPU to work properly. Its about 25 lbs for a 0.5" sq cpu.

Even then, if you don't do a good job with the thermal compound that goes between the HSF and CPU, you will still get poor heat conductance, and potentially create an insulator trapping heat. I can't see any reasonable way you could make an easy motor HS that would be better than just leaving it be. Also, a 25mm fan will not move much air and would be lost in such a big motor.

The HS for the Q125 is a bit diff as you are adding onto the existing undersized HS (vs say direct mount onto the FETs) and the heat output per area of the case isn't as great as a CPU, so the tolerances are more forgiving.

any reason you didn't want to put 6s on the 9920?

	(#15)
Finnster KillaHurtz Offline Posts: 2,958 Join Date: Apr 2006 Location: Bucks Co, PA	11.09.2006, 11:11 AM Sounds like the upgrades should be really fun and will smoke your nitro buddies :) One thing tho I wouldn't do is put a heatsink and fan if you get the 1950. If you've ever played with mounting heatsinks on a CPU, you will find that the HSFs need a ton of spring force onto the CPU to work properly. Its about 25 lbs for a 0.5" sq cpu. Even then, if you don't do a good job with the thermal compound that goes between the HSF and CPU, you will still get poor heat conductance, and potentially create an insulator trapping heat. I can't see any reasonable way you could make an easy motor HS that would be better than just leaving it be. Also, a 25mm fan will not move much air and would be lost in such a big motor. The HS for the Q125 is a bit diff as you are adding onto the existing undersized HS (vs say direct mount onto the FETs) and the heat output per area of the case isn't as great as a CPU, so the tolerances are more forgiving. any reason you didn't want to put 6s on the 9920?