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Home✈️Aircraft🚁HelicopterMiniature Aircraft Whiplash & Fury 55 › Xcell Pro Gear Ratio For YS91?
02-27-2012 11:53 AM  9 years ago
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lajwab

rrApprentice

Chicago, ILL

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Xcell Pro Gear Ratio For YS91?
Hi,
I'v got an old model but in good shape. It's got the YS61 which has not much power left and my plan is to put a YS91ST1 on it because I have it already.
I like to know if someone can tell me what do I need to change to get this particular motor in. I think I have 9.1 gear ratio currently and I need get 8.45 as I have searched.
Do I have to change the main gear or pinion gear?

Also, is there any other parts I will need to change. I will be flying this bird just for normal and some light manuers so no 3d.

I will appreciate any help.

Thanks,

Arshad
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02-27-2012 06:47 PM  9 years ago
junkpilot

rrVeteran

Alamogordo N.M.

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Gear ratio
You wany 8.45 to 1 for yolur YS engine.You'll need tyo change the upper plate ,Pimnion and main gear.
Junkpilot
When you fly JUNK it's hard to tell when you've crashed!
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02-29-2012 01:55 PM  9 years ago
Daves

rrApprentice

Tallahassee, Florida

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The 91ST is a great match for your Pro. However, don't forget you'll need the h/d clutch if you don't already have one. The old clutch for the 60s just won't hold up to the 90 engines.

-- dave --
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03-01-2012 04:06 AM  9 years ago
lajwab

rrApprentice

Chicago, ILL

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Pro parts numbers
Many thanks to all of you for your help.
I would appreciate if you have the part numbers which i need to replace to make it a90 size. I just couldn't find the manual.

Thanks,

Arshad
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03-01-2012 04:54 AM  9 years ago
carcrasher

rrElite Veteran

east coast

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Check out Ron's. He has all the parts u need with pics.
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03-01-2012 11:41 AM  9 years ago
kcordell

rrElite Veteran

O Fallon, MO

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Manuals are online at Ron Lunds website.Team Synergy/Rail, Team Scorpion, YS Engines, VelTye
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Home✈️Aircraft🚁HelicopterMiniature Aircraft Whiplash & Fury 55 › Xcell Pro Gear Ratio For YS91?
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