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HelicopterThunder TigerOther › OS50 hyper & R30 gearing?
01-25-2007 12:11 PM  10 years agoPost 1
SkateFreak

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Cambs UK

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R30 gears in an R50 Hyper?

Well, what'jas all think?
I know most the people down at my club are running 90's with 60 gear ratios?

-Jvr

Non-3D heli pilots are planker spys trying to bring down the heli community from the inside - Topher

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01-25-2007 12:33 PM  10 years agoPost 2
Sanlley40

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Miami, Fl

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Have tried, didnt work for me, i did it with a TT50 engine with the OS 40E carb mod on 30 gears and the engine rpm's went well up, and then the engine was at 18,000 rpm and the blades at 1,600 or 1,700. do the math, if youre planing to get 2000 on the head youre gonna need an engine that runs at 19,000 or 20,000

Check on the hyper rpm range

Sanlley40

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01-25-2007 12:38 PM  10 years agoPost 3
SkateFreak

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Cambs UK

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Ahhh,
I see the logic...
So hows about running R60 gears?

Or will that jst load the engine to heck?

-Jvc

Non-3D heli pilots are planker spys trying to bring down the heli community from the inside - Topher

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01-25-2007 12:47 PM  10 years agoPost 4
Big Edge

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Oldsmar, FL USA

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IMO try running 620mm blades on the Hyper 50 if you want to run the 30 gearing...
With 9.56 gear - Head speed at 1800 - engine rpm = 17208
With 9.56 gear - Head speed at 1850 - engine rpm = 17686

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01-25-2007 12:50 PM  10 years agoPost 5
Sanlley40

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Miami, Fl

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maybe the differences on the 60 and 90 ratios are not that big, so the 90 engine could handle the other gearing, but there is another gear for raptors i think, like 8.75?? or around

Sanlley40

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01-25-2007 04:01 PM  10 years agoPost 6
BarracudaHockey

rrMaster

Jacksonville FL

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The Titan gear set is 8.7, the stock gears are 8.5 Northernlights did a lot of messing around with gearing, including running the 30 gears in a 50, might want to check with him.

Andy
AMA 77227
http://www.jaxrc.com

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01-26-2007 02:16 AM  10 years agoPost 7
NORTHERNLIGHTS

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Riverview FL

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Thanks for the input Andy
I`m back running the 8.7 gear in one XeroG, and 8.5 in the other. Found it was better to swing the piss out of the blades. I`m currently running 2100 rpm on each. Performance is great with the bigger carbs and MP. I have both under 8lbs. If someone wants to wake a V2/50 up put in the 8.7 gears, metal head, and grips. Run the MP, and 60K cline. Just keep an extra engine Handy. I have 30 flights on this motor so far.

PS 610 Rotortechs

B.O.A.T. Break Out Another Thousand!

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HelicopterThunder TigerOther › OS50 hyper & R30 gearing?
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