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HomeAircraftHelicopterThunder TigerRAPTOR 30 › os 37 - what is up with shims?
04-05-2009 04:53 AM  9 years agoPost 1
Gas and Go

rrApprentice

Western Wisconsin- USA

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I have been running os37 for some time now on 30% nitro. it came with one gold colored shim allready assembeled in motor. I hear some saying to add shims for higher nitro content. Motor seems to be running fine to me, but I fly alone; and dont have a comparision.
Any one else running an os37 what shims are you using for 30% nitro?

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04-05-2009 03:07 PM  9 years agoPost 2
T-Rex-Flyer

rrElite Veteran

Panama City, Fl

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I have an Raptor 30 with an OS-37, It doesn't get much flying time since I got my 50 Titan last year but it run fine on 30% CP with just the one shim.

If the wings are traveling faster than the fuselage, it's probably a helicopter.

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04-05-2009 03:58 PM  9 years agoPost 3
wjvail

rrKey Veteran

Meridian, Mississippi

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30% Nitro is usually added for slightly more power. If it's more power you're interested in, I'd look at a .50...

I have a .37 and a .50 and if I just want to enjoy watching the parts go 'round, I fly the .30 on 20%... If I need more power, it's the .50

All of this is to say, punching up a .37 with more nitro is a little bit of an oxymoron... Like "jumbo shrimp" or "Microsoft Works"

To answer your question, I'd run the one shim and reduce the nitro until you have good plug life and no knocking. Since you've found that already I'd press ahead.

Cheers,

Bill

"Well, Nothing bad can happen now."

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04-06-2009 01:45 AM  9 years agoPost 4
Gas and Go

rrApprentice

Western Wisconsin- USA

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yea, I want to buy a 90 size nitro next, but the money to do the super sweet setup is just not here yet. I did notice a increase in power when I switched to the 30% from the 15% I was running.

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