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HelicopterScale Model RC Helicopters › Major Heat Problem
06-02-2010 06:28 PM  7 years agoPost 21
GrantL

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Springfield, MA

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Thanks Stan.. We'll get there..

Well.. I went out early this morning and did some more testing with the elect guys at the field..

One of the guys put his watt meter which records the largest draw during the flight and we came up with what we would guess to be good numbers..

Batt pack 1
1020 watts for a one min flight with 33.96 amp draw
Batt pack 2
821 watts for a one min flight with 27.32 amp draw

Both flights were very much within the motor capabilities..

I then flew a 5 min flight and the motor and batteries were both about the same temp.. Elect guys at the field said the motor felt warm but OK.. The batteries ??? who knows.. We also tested the batteries before any flying and the pack 1 only showed 19.x volts.. not the 21.0 that should have been after a full charge.. Mmmm tired batteries.. The pack 2 was OK..

So.. the general feeling is possibly more HD speed needed..Flew 1800 for testing. I'm going to try 1900 and see what I get.
Ran out of batteries at this point..
Again.. an added 1.5lb wt and NO air movement.. All felt the fan I put in doesn't do any good.

Comments?????
Thanks

Grant

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06-03-2010 02:18 AM  7 years agoPost 22
GrantL

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Springfield, MA

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Dr Tim, What head speed are you running?

Grant

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06-03-2010 02:48 AM  7 years agoPost 23
Dr.Tim

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Mojave Desert

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Running 1700 Grant, Running 85% on the power with 650mm blades but I do have the 1200kv motor Align sells. The Motor that came with the Trex 600 would only get around 5 minutes flight times and get hot. I get 8 to 10 minutes now with One 6S 5000mah pack.

Not sure how to set up the rapter though .. each one is a little different.

From Simple minds come simple ideas! Approach Engineering

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HelicopterScale Model RC Helicopters › Major Heat Problem
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