RunRyder RC
WATCH
 4 pages [ <<    <    ( 1 )     2      3     NEXT    >> ] 9342 views POST REPLY
HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › New .91 YS Engine
01-15-2010 10:36 PM  8 years agoPost 1
ToddB

rrNovice

Ca

My Posts: All  Forum  Topic

The new YS .91 high compression,

I have been working closely with YS in Japan and YS domestically to develop this new engine. My goal was to get a good noticeable power increase over the SR and make a more efficient engine with respect to run time and less fuel residue on your model after a flight. We have gone through several revisions to get to the results we were looking for.

I have also been working closely with Tetsuo Hatori to come up with the right exhaust system for this engine. We have tested many different versions of mufflers and so far the SB-19 is still the clear winner. I do have a few more tuned mufflers to test and I just want to make sure that we find the best possible muffler for this engine as we have done in the past with YS.

I am not sure yet what they are going to call this new engine. As soon as I hear the name, I will pass it along.

So far I think we have achieved our goals that we have strived for; everyone should be very pleased with this new engine.

I hope this post answers some questions regarding the new engine.

Best regards,
Todd Bennett

PM  EMAIL  Attn:RR  Quote
01-15-2010 10:46 PM  8 years agoPost 2
george0079

rrElite Veteran

USA

My Posts: All  Forum  Topic

what a teaser thead....

No pics?
No specs?

Hell... I can fix that.
Uh oh..
Nope.
It's ***ked!!!
RE-KIT!!!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
01-15-2010 11:43 PM  8 years agoPost 3
ToddB

rrNovice

Ca

My Posts: All  Forum  Topic

new ys
George,
I am not a fan of teaser posts either this post was to clear up some possible confusion on this new product. Tim Jones has a test engine as well and will be posting pics and a video soon. As far as looks go it is very close to the SR in physical appearance.

Regards,

Todd

PM  EMAIL  Attn:RR  Quote
01-15-2010 11:59 PM  8 years agoPost 4
FlytilyaDrop

rrVeteran

Playboy mansion

My Posts: All  Forum  Topic

Put a motor out with more power than the SR????

Put me down for one.

This hobby sucks, when your not flying.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-16-2010 12:07 AM  8 years agoPost 5
billiano

rrVeteran

Greece ,Patras

My Posts: All  Forum  Topic

Sometimes I do confuse bar with heli........or heli with bar?
Pls give me one more.
Your post is like Noa's story no-one to believe until....

Esprit Model Flight Team
Kasama Srimok 90N FBL
TDR Rigid 90

PM  EMAIL  GALLERY  Attn:RR  Quote
01-16-2010 12:39 AM  8 years agoPost 6
Agilefalcon

rrKey Veteran

Fort Worth, Texas

My Posts: All  Forum  Topic

Todd, a couple of years ago you were running a YS 100 (1.0 cubic inch). Any idea why YS didn't see the benefit of offering a "3D" engine in that displacement? Obviously, it wouldn't meet F3C rules, but that's a fairly small number of people, especially here in the US.

Or, they could have gone bigger - a 105/106 for example.

It would seem to me that without a displacement increase, there wouldn't be much of a power gain given the current state of development. There would have to be some radical changes like offset cylinder bores, reed valve induction or something of that nature to truly make more power.

Nothing makes power, or torque, like cubes!

Chris Berardi
Team BobbyJack's Hobbies

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-16-2010 01:26 AM  8 years agoPost 7
Pulento

rrVeteran

CHILE

My Posts: All  Forum  Topic

Increasing displacement on one cylinder engines makes things harder to balance. Vibration increase a lot.

IMO they should increase efficiency, it seems there is a lot of room for improvement.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-16-2010 03:30 AM  8 years agoPost 8
baby_zyklon

rrElite Veteran

Singapore

My Posts: All  Forum  Topic

I am for increasing the efficiency of the engine to produce more power. A larger engine that is more thirsty than the current crop of engine will only make electrics more practical and attractive because they make more power with similar flight time and cost.

Any chance that the new engine will be tuned to run higher rpm than the current 91sr?

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-16-2010 04:56 AM  8 years agoPost 9
The man

rrVeteran

at home

My Posts: All  Forum  Topic

Interested in a more powerful YS91. More info please.

PM  EMAIL  Attn:RR  Quote
01-16-2010 02:47 PM  8 years agoPost 10
Fury3D (RIP)

rrApprentice

Summerville, SC 29485

My Posts: All  Forum  Topic

I have also been running one of these new prototype engines. The power and efficiency of this engine have been dramatically increased. Power, as well as flight time is up.

There is always room for improvement with what we already have, and I believe YS has addressed this with this new engine.

The wait will be worth it, as I don`t think anyonw will be dissapointed with this new powerplant.

Regards,

Mike Swift
Align
Team Futaba
Morgan fuels
CYE
Scottgrayrc
YS Engines

PM  EMAIL  Attn:RR  Quote
01-17-2010 09:00 AM  8 years agoPost 11
Knud Pedersen

rrKey Veteran

Denmark - Europe

My Posts: All  Forum  Topic

good noticeable power increase over the SR and make a more efficient engine with respect to run time and less fuel residue on your model after a flight.
Thats great new Tood B.
Looking forward to see/try the "noticable power increase"!
Does it have to run at the same RPS as the SR?
Does it have the same Powerplant size? - wonder if it will fit in my stratusses...

Great news

ChopperKnud
Team Miniature Aircraft
ThePitchbrothers

PM  EMAIL  GALLERY  Attn:RR  Quote
01-17-2010 02:07 PM  8 years agoPost 12
Fury3D (RIP)

rrApprentice

Summerville, SC 29485

My Posts: All  Forum  Topic

Yes, the new engine is the same footprint as the SR. On mine, I am running it at 1950 in a T-Rex 700.

Mike

Mike Swift
Align
Team Futaba
Morgan fuels
CYE
Scottgrayrc
YS Engines

PM  EMAIL  Attn:RR  Quote
01-18-2010 01:53 AM  8 years agoPost 13
Gernejr

rrKey Veteran

Miami, Fl

My Posts: All  Forum  Topic

Sounds like they did a little port work and work on making the carb more efficient,Also as stated upped the compression ratio. Hey that sounds just like what I'm having done to my YSsr right now for few bucks.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-27-2010 03:27 AM  8 years agoPost 14
Brendan78

rrVeteran

NSW Australia

My Posts: All  Forum  Topic

Hi Todd,

Any update on a release date?? sounds like a production YS91SR-RR that would be awesome

PM  EMAIL  GALLERY  Attn:RR  Quote
01-27-2010 04:07 AM  8 years agoPost 15
ch-47c

rrElite Veteran

san jose, ca

My Posts: All  Forum  Topic

Is there a significant increase in power?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-27-2010 11:57 AM  8 years agoPost 16
EagleMan!

rrApprentice

Sydney, Australia

My Posts: All  Forum  Topic

Hello Todd,

Would you be able to tell us whether there are any difference between SB-19 and the 937-2 (sold in Japan).

From the outside, it looked exactly identical.

SB-19 is only available from the US.

Appreciate your feedback.

Cheers...

"If it doesn't work...TRY HARDER!!"

PM  EMAIL  Attn:RR  Quote
01-27-2010 01:32 PM  8 years agoPost 17
synodontis

rrKey Veteran

United Kingdom

My Posts: All  Forum  Topic

Fury3D,

Could you tell us if the new engine is a long stroke like the SR or has it reverted to normal stroke like ST.

The thing I really hate about YS engines has always been their quality control, OS wins in this department, but YS has the best fuel delivery system.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-27-2010 01:43 PM  8 years agoPost 18
Fury3D (RIP)

rrApprentice

Summerville, SC 29485

My Posts: All  Forum  Topic

It is a long stroke, the same as the SR.

Mike

PM  EMAIL  Attn:RR  Quote
01-27-2010 03:46 PM  8 years agoPost 19
synodontis

rrKey Veteran

United Kingdom

My Posts: All  Forum  Topic

well in that case, thanks but no thanks. The SR definitely has more vibes than the ST. I'll stick to OS.

BTW, I take it that because the engine has more power and is more fuel efficient, there is more vibes as to be expected? Is there an increase in rpm as well?

I can understand why YS doesn't want to move over to a bigger size the cost for a new mould for a newer engine will be quite high. OS is a bigger company and can afford to make a newer mould for another engine, the OS 91 SZ I've been told can be scavenged to 100 or 110 or thereabouts. The YS 91s are just YS 60 crankcases, I can't see YS pushing it to 100 let alone 110 on an original YS 60 crankcase.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-27-2010 03:54 PM  8 years agoPost 20
DS 8717

rrProfessor

Here wishing i was somewhere else

My Posts: All  Forum  Topic

I have the YS SR and the OS HZ and the YS is smoother than the OS...

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 4 pages [ <<    <    ( 1 )     2      3     NEXT    >> ] 9342 views POST REPLY
HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › New .91 YS Engine
 Print TOPIC  Make Suggestion 

 29  Topic Subscribe

Tuesday, September 25 - 8:43 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online