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Thunder Tiger 60/70/90 Raptor 60/70/90 Helicopters |
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05-27-2009, 11:03 PM | #1 (permalink) |
Join Date: May 2009
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Starting an OS 91sz in a Raptor 90SE
Hello,
After flying 60 size heli's for a number of years, I built a 90SE Raptor and installed an OS Max 91SZ-PS Hyper motor. My problem is finding enough juice to turn this beast over! I dumped my "regular" Sullivan starter for a Hi-tork Sullivan starter but even with a car 12v car battery, It has trouble turning over the motor. Do I need a 24v set up? I was able to modify an 18v DeWalt cordless drill to turn over the engine but why wouldn't a Hi-tork starter work? Starting this engine is getting to be more of a pain than it's worth! Tim |
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05-28-2009, 05:27 AM | #2 (permalink) |
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Join Date: Oct 2008
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12 v isn't enough. I use a dynatron 12/24 v heavy duty starter with a 4s 2500 mah lipo and it starts like a dream.
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TREX 550 X , Microbeast Plus, Futaba 10J |
05-28-2009, 09:09 PM | #3 (permalink) |
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Dynatron 12/24 with two 3S 11.1v lipos in series. Generates about 25v when fully charged, and would turn over a Model-T Ford . But you had better make sure your fan is really secured on the crankshaft, or you will spin it right off
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Mike: Rap-90 3D x 2, Rap-50 x 2, Fury 55, Rex-450, Hirobo Squark. "Depression is nothing more than anger, without enthusiasm" |
07-08-2009, 03:04 PM | #4 (permalink) |
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Join Date: Jun 2008
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I have Dynatron Starter with ZIPPY Flightmax 5000mAh 5S1P 30C. I'll get 18,5V and
it' s plenty enough for my R90SE with OS91HZ, but it's compact and easy to carry and also easy to start. AD |
07-09-2009, 07:58 AM | #5 (permalink) |
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Join Date: Mar 2006
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4 cell or 5 cell will also start a 90. For years I used two 7 cell r/c car batteries wired in series. 14 cells would do it every time! YOu can find Nimh packs for pretty cheap now.
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07-09-2009, 08:27 AM | #6 (permalink) |
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Join Date: Jan 2007
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You think they would take the picture of the 12v set up out of the manual since 12v isnt enough to start it.
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Raptor 30V2,90SE EXI 450 Pro illicittrendz.com Its better to die on your feet than to live on your knees. |
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