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Mosquitok8 · 05-27-2009, 11:03 PM

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

shultzee · 05-28-2009, 05:27 AM

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.

Badger50 · 05-28-2009, 09:09 PM

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

arthurdent · 07-08-2009, 03:04 PM

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

Brian James · 07-09-2009, 07:58 AM

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.

rvjunior · 07-09-2009, 08:27 AM

You think they would take the picture of the 12v set up out of the manual since 12v isnt enough to start it.

05-27-2009, 11:03 PM	#1 (permalink)
Mosquitok8 Join Date: May 2009	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

05-28-2009, 05:27 AM	#2 (permalink)
shultzee Registered Users Join Date: Oct 2008	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. __________________ TREX 550 X , Microbeast Plus, Futaba 10J

05-28-2009, 09:09 PM	#3 (permalink)
Badger50 Registered Users My HF Map location Join Date: Oct 2007	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 __________________ Mike: Rap-90 3D x 2, Rap-50 x 2, Fury 55, Rex-450, Hirobo Squark. *"Depression is nothing more than anger, without enthusiasm"*

07-09-2009, 08:27 AM	#6 (permalink)
rvjunior Registered Users Join Date: Jan 2007	You think they would take the picture of the 12v set up out of the manual since 12v isnt enough to start it. __________________ 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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07-08-2009, 03:04 PM	#4 (permalink)
arthurdent Registered Users Join Date: Jun 2008	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)
Brian James Registered Users Join Date: Mar 2006	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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