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othello
HV basher
 
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Posts: 392
Join Date: Jun 2007
Location: Austria (Europe)
10.23.2007, 04:38 AM

From my perspective i don't think you will need this complex heatsink design, because you won't push the Jazz to the same powerlevels (up to 4KW) as he does with his big heli.

I found this graph of a heli guy using a jazz 55 with a Neu 1910/1Y using 8s lipos. Power levels up to 2.3KW and an average amp draw of 42A. On your car i would expect your highest bursts between 1.2-2.5KW but your average amp draw will not be even close to 42A. I think it would be more in the range of 8-15A.

The only thing i did is mount the ESC upside down and removed the heatshrink where the cooling plate is (this improves heat dissipation). After a hard continouus run the cooling plate feels only warm to the touch (This is with power levels up to 1.7KW and 10s1p A123 in a 9lb 1:8 buggy geared to 67km/h (42mph)).

Very clean layout ... looking forward to read about your maiden run.


Brushless 1:5 custom 4wd Baja based on 1:8 truggy chassie
Jazz 55-10-32, Neu 1515/2Y (1100kv), 9s2p A123 (27v), up to 3.1KW
Latest video with eagletree Data inserts: Run on asphalt

Last edited by othello; 10.23.2007 at 05:19 AM.
   
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