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HelicopterEngines Plugs Mufflers Fuel › NEW OS 1.05 Heli Engine
11-30-2011 02:07 PM  5 years agoPost 1
ssrobzoom

rrKey Veteran

Tn

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11-30-2011 02:16 PM  5 years agoPost 2
love2flylow

rrApprentice

New Hampshaa US of​A

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will that be the ys 120 competition? wonder how i will preform compared to the ys???? hmmmmmmmmmmmm.....

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11-30-2011 02:25 PM  5 years agoPost 3
Kyle Owen

rrApprentice

Newberry, Florida

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Well as I've learned in racing...there's no replacement for displacement. Yeah its a little more, but most likely wont compare to the 1.20

sponsored by overtime
Formerly known as MADROTORZ
THANK A VERTERAN, PUNCH A POLITICIAN

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11-30-2011 02:35 PM  5 years agoPost 4
unclejane

rrElite Veteran

santa fe, NM, USA

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Hmmm... I wonder if rcjapan ships to the US. At the current FX rate, the 1.05HZ-R is about $470, cheaper than the .91 !

Anyone ever seen one or know when it's going to be available in the US?

LS

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11-30-2011 02:38 PM  5 years agoPost 5
unclejane

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santa fe, NM, USA

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>Yeah its a little more, but most likely wont compare to the 1.20<

This 1.05 will probably last a little longer tho, especially the main bearings. The 1.20 is awfully huge for that little tiny crankcase. This may be a more reliable motor just on the power vs. size metric...
Tho don't get me wrong, I'd love to have both!

LS

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11-30-2011 03:54 PM  5 years agoPost 6
jgunpilot

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Pollock, LA

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I'm waiting for the 1.21. It should be better.

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11-30-2011 08:41 PM  5 years agoPost 7
Axeman

rrApprentice

Auckland, New​Zealand

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There are 2 models - 105HZ(18700) Non-regulated 3.7ps and 105HZ-R(18750) 3.8ps

I'm not sure how the regulated system can give a higher ps figure?

Also Hatori has a new muffler for the 105FS-3D(HA-2105) and OS has a new Powerboost pipe coming as well OS-72146000

Fun times ahead for us

Cheers from New Zealand!

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11-30-2011 09:57 PM  5 years agoPost 8
unclejane

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santa fe, NM, USA

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>I'm not sure how the regulated system can give a higher ps figure?<

I believe the regulated carbs have a slightly bigger venturi. I know the spraybar and needles are different parts on my .91's. The HZ-R spraybar is gigantic compared to the regular HZ carb - that one is more like a little needle....

LS

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12-01-2011 12:35 AM  5 years agoPost 9
dchekas

rrKey Veteran

Farmington, CT

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So anyone how long it usually is between the Japan release and US release? I don't see it on Tower.

Team Align, Team Futaba, Team Byron Fuels, Team Thunder Power

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12-01-2011 06:06 AM  5 years agoPost 10
Dr.Ben

rrMaster

Richmond, VA, USA

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Cubic inches are only useful if they lead to CONSISTENT power delivery across the entire tank/flight and withOUT chasing needle settings. This and bearing longevity are ultimately going to determine acceptability to the consumer.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

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12-01-2011 12:34 PM  5 years agoPost 11
unclejane

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santa fe, NM, USA

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Well I can definitely report that my 91 HZ-R gives very consistent mixture control from beginning to end. Probably the only engine I've ever run that actually does so .

Hopefully the 1.05 will be the same. And if it has the backplate that accepts the BPS-1 governor sensor, I'll probably break down and buy one of the HZ-R models when they become available.

I need more power at my altitude (about 7000' above sea level) for the low headspeeds I run. The O.S. Speed motors' main problem is they're not covered under warranty so never bought one. So the 1.05 might be my next engine...

LS

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12-01-2011 01:38 PM  5 years agoPost 12
reddragon

rrElite Veteran

Brooklyn, N.Y.

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The price for that engine is insane.

Wayne - Fly it like you stole it! You're in good hands with Runryder!

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12-02-2011 05:25 PM  5 years agoPost 13
Quebec X50

rrNovice

Quebec, Canada

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I order mine yesterday night and the MAP price was 529$ and It will be available a the end of december for the engine and the Power boost pipe at the end of Jan and the MAP price was 269$

http://www3.towerhobbies.com/cgi-bi...s+105&search=Go

JR NEX6, JR VIBE E8, JR VIBE NEX 50

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12-02-2011 09:06 PM  5 years agoPost 14
sky'

rrApprentice

..

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Hey guys,

damn this engine is powerful!

Watch at YouTube

Watch at YouTube

Regards,
Gottfried

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12-03-2011 03:16 PM  5 years agoPost 15
Zaaaguy72

rrElite Veteran

MN

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Between the 2, the 105 is more appealing. The 120 has vibration issues and you have to deal with a bladder pressure system which can be a pain in the rear. Also some tuning issues have been apparent with the 120. Dont me wrong, I am actually a YS fan, but in this case, the OS is the route I will go.

Team Sanjel!

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12-03-2011 04:38 PM  5 years agoPost 16
unclejane

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santa fe, NM, USA

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>Between the 2, the 105 is more appealing<

Same here. Now that the 105 is actually out and I can see it and its specs, etc., it looks preferable to the YS120 to me. The 120 is, in my view, simply too much displacement for its size. My mouse has hovered over the Add To Cart on one a bunch of times, but I've always been stopped by my worries about it. In particular, the bottom end (i.e. the bearings, etc), vibration and difficulty starting with the cheezy start shaft assemblies in most 90 size nitro helis.

The 105, on the other hand, is only 2cc more displacement. It's also very oversquare on the bore/stroke which should help keep the vibrations down. The 120 is an oversquare design too, but it's also just plain huge . It's also nice to see that the weight is virtually unchanged over the OS 91's. A velocity stack on the carb is used for suping up too, which probably will help with upping the power output. And since it's only slightly larger, it shouldn't present too much more load to the start shafts/OWBs on nitro helis.
Finally, it's covered under warranty . This was my problem with the Speed series engines and why I never wanted to buy one....

So a 105 may be my next engine too soon as I wear out my existing 91's.....

LS

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12-03-2011 05:05 PM  5 years agoPost 17
rexxigpilot

rrProfessor

Florida

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The 120 has vibration issues
Who says? My YS56 is very smooth compared to my YS50. I would think the 1.20 went through the same balancing treatment.

I've not been satisfied with my OS 91 engines, or OS55 for that matter. I am seriously considering replacing one of my OS91's with a YS 1.20. If there is confirmation on the 1.20 having bad vibrations then no dice! I don't want to gamble with $733 for the engine and pipe.

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12-03-2011 05:32 PM  5 years agoPost 18
DS 8717

rrProfessor

Here wishing i was​somewhere else

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Funny how rumors get started,the 120 doesnt have vibration issues and every YS i have had have been smoother than the OS.There were some versions of the OS 90 that vibrated bad,and we all know about the 50

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

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12-03-2011 06:07 PM  5 years agoPost 19
Zaaaguy72

rrElite Veteran

MN

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Some friends of mine who were testing the YS120 stated they were having some vibration issues. I agree about the YS engines in general being smoother, that is why I ran YS in my nitros before I switched to electrics. I am not bashing YS at all, I just like OS's approach to the larger engines for this class.

Team Sanjel!

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12-03-2011 06:31 PM  5 years agoPost 20
helismash

rrKey Veteran

Gloversville, NY -​Fulton

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I have gone the YS route and replaced most of my OS engines. I like the power and I don't have to deal with Hobby Services.

Hey, Who put the ground there!
T-Rex 500/T-Rex 600N FBL/T-Rex 600E PRO/T-Rex 700N/T-Rex 700FBL

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