RunRyder RC
 1  Topic Subscribe
WATCH
 1 page 719 views POST REPLY
Scorpion Power Scorpion Power
HelicopterSynergy R/COther › Synergy with Standard YS 91 ST4
11-26-2007 12:18 PM  9 years agoPost 1
APOPHIS

rrApprentice

New York - USA & Manchester UK

My Posts: All  Forum  Topic

Wanting to fit a Standard YS91ST4 into a synergy, how many of you guys are running this engine with the standard gear ratio? Is it worth changing the ratio or going for an SR???? I have an ST without a home so was thinging about throwing it in the synergy.

Any thoughts?

Thanks!
Christian

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2007 12:36 PM  9 years agoPost 2
BPFlyer

rrApprentice

Wichita, KS

My Posts: All  Forum  Topic

I tried that combo with my first kit (stock gearing). I used a Hatori SB-16 on the YS 91ST first, it was short on power. Tried a Hatori SB-18 pipe on the YS 91ST next, better power-and real tough to tune.

I decided to pull the engine and go with OS 91 Hyper pumped. Big difference on the power, the OS had quite an advantage.

I haven't tried the YS 91SR yet. Most seem to say it pulls very well. If I were looking to start from scratch, I'd be real tempted to go with the YS 91SR. I really like the way YS motors hold a tune.

Fly it like you stole it!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 01:19 PM  9 years agoPost 3
Saleh

rrVeteran

Kuwait

My Posts: All  Forum  Topic

if you want to run the ST you should change your gear ratio to 8:45 insted of 8:27 inorder to satisfay the engine otherwise run the new sr with the 8:27 it will run just fine

If you aint crashing you aint flyin

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-27-2007 05:20 PM  9 years agoPost 4
Chuckie

rrKey Veteran

Crofton Maryland

My Posts: All  Forum  Topic

With the ST and SB-18 the YS had good power. The SR has more power for sure so if you want to fly the N9 with as much power as you can get then go for the SR/SB-19. The other advantage of the ST is the longer flight times. It's only a few minutes but the SR power has a price.

Charles

Please stand by for faster service!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2007 09:34 PM  9 years agoPost 5
Bart B

rrKey Veteran

chicago illinois

My Posts: All  Forum  Topic

Chuckie's back
Please stand by for faster service!
Will do!

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 719 views POST REPLY
Scorpion Power Scorpion Power
HelicopterSynergy R/COther › Synergy with Standard YS 91 ST4
 Print TOPIC  Make Suggestion 

 1  Topic Subscribe

Tuesday, October 24 - 3:21 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online