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HomeAircraftHelicopterGasser Model RC HelicoptersOther News  New OS 15cc Gas engine
08-08-2012 08:28 PM  6 years agoPost 141
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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so there has been a lot of speculation about this motor but not a lot of real detail available.

Earlier today Hobbico shared some videos made by OS Max yesterday of the motor flying in three different platforms. I was given permission to publish them here

Hirobo Eagle Freya

Watch at YouTube

Align Trex 700

Watch at YouTube

JR Vibe 90

Watch at YouTube

As you can see OS is making good progress with this

Some comments to answer likely questions
  • the fuel contains klotz oil. Klotz is red so that accounts for the color of the fuel. It is NOT glow fuel
  • I don't know the purpose of the edits in the videos
  • I don't know the size of the rotor blades used. The models are clearly 90 sized versions of each
  • I have personally flown a version of this motor in a model so it is definitely real
  • I don't know the release date or the pricing of the motor

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08-08-2012 08:37 PM  6 years agoPost 142
rc3po

rrVeteran

Danville, Illinois

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Nice!

Seemed to be using standard nitro pipes too.. Wonder if they've been modded (pipes). This is definately progress..!!

Happay Happay Happay...

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08-08-2012 09:53 PM  6 years agoPost 143
payne1967

rrElite Veteran

uk

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how come they are using klotz oil and not a std two-stroke oil?
would the amsoil two-stroke oil running at 100:1 be any good for the motor?

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08-08-2012 09:57 PM  6 years agoPost 144
Carey Shurley

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Orlando, FL - USA

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errr klotz IS a two stroke premix oil

eventually it will get run with other oils. OS specified klotz for their testing

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08-08-2012 10:24 PM  6 years agoPost 145
Justin Stuart (RIP)

rrMaster

Plano, Texas

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Yeah baby!

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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08-08-2012 10:31 PM  6 years agoPost 146
brw0513

rrApprentice

Brisbane, Australia

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Phew! At last some progress. Thanks Carey for posting.

The Klotz oil is not a total surprise. Here in Australia, when Saito engines are returned for service/repair/warranty claims the engine comes back with a test report and recommendation. When I sent my Saito FG-14B (four stroke spark ignition gas engine) in for investigation, the oil recommended was CoolPower blue. This seemed odd to me because I'd never read anything about this oil in this application, but that Saito now runs like a sewing machine.

Ian B

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08-08-2012 11:02 PM  6 years agoPost 147
BobOD

rrElite Veteran

New York- USA

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Sewing machines don't fly that well.

Sorry, I had to do it.

Cool vids, something else to want.

Team POP Secret

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08-09-2012 12:07 AM  6 years agoPost 148
Billme

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MS

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Very revealing to me what needs to be done after watching 3 different machines fly the same engine...

Of those three, which one did the best ?

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08-09-2012 12:36 AM  6 years agoPost 149
payne1967

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uk

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i'm educated as i always thought klots was a brand name of the oil
like shell/castrol etc

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08-09-2012 01:26 AM  6 years agoPost 150
Carey Shurley

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Orlando, FL - USA

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Seemed to be using standard nitro pipes too
actually it includes a special version of the OS Powerboost pipe.

it has a pleasant sound and is not particularly heavy

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08-09-2012 03:57 AM  6 years agoPost 151
brw0513

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Brisbane, Australia

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Of those three, which one did the best ?
The one without the flybar?

Ian B

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08-09-2012 04:28 AM  6 years agoPost 152
Gearhead

rrMaster

Vt

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""The one without the flybar?""

the Freya did seem to cover more airspace faster than the other 2

I would love to try this engine in a Century N640 with 660s

Jim
Buzz Buzz Buzz

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08-09-2012 04:38 AM  6 years agoPost 153
turboomni

rrProfessor

East of the Equator

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So this is a 15cc engine?? WOW!!
What would happen to this design at 23 to 29cc I wonder..

Setup is everything, All my heli's can fly far better than I can pilot them

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08-09-2012 11:17 AM  6 years agoPost 154
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

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Did not other nitro/petrol conversions fly ok?Wasnt it cooling the problem?Be interesting to see how this is overcome,once sorted i could see a wide appeal amongst the more sedate flyers.

Team- unbiased opinion.K.I.S.S principle upheld here

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08-09-2012 02:00 PM  6 years agoPost 155
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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i'm educated as i always thought klots was a brand name of the oil
like shell/castrol etc
Klotz is a brand name but they have 2 stroke premix blends as well

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08-10-2012 12:43 PM  6 years agoPost 156
Blanka

rrApprentice

lover city

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I have personally flown a version of this motor in a model so it is definitely real
what model ? any video please ?
what's the carb ? walbro or OS glow carb ?
will they try it on the 50 class helis ?
same battery for ignition and receiver ?
what oil ratio 25:1, 30:1, 40:1 ?
will it come with the latest HV RCEXL unit ?

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08-10-2012 01:07 PM  6 years agoPost 157
brw0513

rrApprentice

Brisbane, Australia

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Yeah, spill the beans Carey! Pantera 6 is a wild guess

By demonstrating on three airframes, I presume OS are trying to prove this engine will work over a number of platforms. I imagine the 3 makes would have different mechanical fan designs and hence different air flows (cooling capacity).

I'm not sure this engine will be a drop in fit to a typical 50 size airframe though. The crank, i.e. the bit protruding outside the engine, is probably identical to an OS91 so easy enough to pickup a typical 90 size clutch and fan arrangement. But not so a 50 size driveline and the smaller fan might be an issue too.

I'm doing some research now for those marques that have the same frame spacing between their 50 and 90 size airframes. This is a big help to get a 90 size driveline into a 50 size airframe. The MA Fury55 and Whiplash nitro fit the bill. Provided Whippy parts are available, it shouldn't be too hard to morph the Whippy clutch and fan arrangement into the 55 airframe - new sideframes required of course.

The Henseleit TDR and Rave ENV share identical frame spacing too. It should be possible to marry these marques to get the GT15HZ into the TDR airframe.

Pipe dreams really, but I enjoy daydreaming about this stuff.

Ian B

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08-10-2012 01:20 PM  6 years agoPost 158
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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no actually a Raptor 90 3D. I don't think any of the std cooling systems for 600 class models would be adequate.

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08-10-2012 02:16 PM  6 years agoPost 159
Billme

rrElite Veteran

MS

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OS needs to finish these test before proceeding... They need to ask questions concerning the difference between these three flights alone...
I would like to know what else was used in these test, telemetry etc ?
They need to evaluate those numbers between all three, and then compare them to what was used such as drive trains, and cooling fans etc...
Wouldn't it be a shame if they just said the heck with it based on these test alone, when maybe just a small change would make all the difference?...

Just looking, based on my criteria, the Jr done the best, Trex second, and Hirobo a distant third....
Its not so much the movement of the heli, its how the engine reacted during the movement..

Regards
Bill

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08-10-2012 02:18 PM  6 years agoPost 160
Pistol Pete

rrProfessor

Seffner, FL

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Nice videos. Nice take off and landings. Must be a FAI flyer.

Curious...which model is the lightest machine? Hirobo, T-rex, JR (in videos) or Raptor?

Figured the collective knowledge here would have the answers on hand.

~~Enjoying the hobby one flight at a time~~

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