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O.S. FS26S question - 11/28/2003 5:39:38 PM   
Jackster00


 

Posts: 148
Joined: 3/8/2003
From: Caledonia, IL, USA
Status: offline 		Can anyone tell me if this engine has been discontinued? I've looked at a few merchant websites and been unable to find it. Is it worth pursuing for a .20 size trainer kit (Goldberg)?

Jackster
       Post #: 1

RE: O.S. FS26S question - 11/28/2003 5:51:24 PM   
J.Paul Saure



Posts: 210
Joined: 9/6/2002
From: Concepcion, CHILE
Status: offline 		Yes, it's been discontinued. I have one on a GP J-3 Piper Cub.20 with floats, nice engine, good thrust with an APC10x6. Very quiet!
Would be a great choice for a .20 trainer, I've seen it on a Kadet Junior.

Good luck on finding it! The new .30Surpass is also a great choice.

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RE: O.S. FS26S question - 11/28/2003 6:05:30 PM   
jaka


 

Posts: 4638
Joined: 12/11/2001
From: Upplands Vasby, SWEDEN
Status: online 		Hi!
I don't know if the OS Fs .26 still is manufactured but it should not be impossible to find one if you search around. OS is now making a FS .30 engine instead of the FS.26 which has nearly the same physical shape and size as the FS .26 only a little higher.

I wouldn't use the older FS .20 on a high winged trainer aircraft, No!
I've had two of these FS .20 20 years ago and they ran fine but they were not capable of flying planes with wing loading exceeding 2,5kg very well.........sailing type airplane, yes! But I would not use one in a high-winged .20 trainer.
For a trainer that size (around 120-135cm in span) a .25-.32 two stroke swinging a APC 10x4-10x5 prop is much more suitable!

Regards!
Jan K
Sweden

(in reply to Jackster00)
       Post #: 3

RE: O.S. FS26S question - 11/28/2003 8:33:11 PM   
J.Paul Saure



Posts: 210
Joined: 9/6/2002
From: Concepcion, CHILE
Status: offline
quote:

ORIGINAL: jaka

Hi!
I don't know if the OS Fs .26 still is manufactured but it should not be impossible to find one if you search around. OS is now making a FS .30 engine instead of the FS.26 which has nearly the same physical shape and size as the FS .26 only a little higher.

I wouldn't use the older FS .20 on a high winged trainer aircraft, No!
I've had two of these FS .20 20 years ago and they ran fine but they were not capable of flying planes with wing loading exceeding 2,5kg very well.........sailing type airplane, yes! But I would not use one in a high-winged .20 trainer.
For a trainer that size (around 120-135cm in span) a .25-.32 two stroke swinging a APC 10x4-10x5 prop is much more suitable!

Regards!
Jan K
Sweden


I don't know about the .20 you mention, but my experience with the 26 is that it is an excelent choice for a .20 trainer. My friend's kadet junior has more than enough power, and my 156cm j-3 WITH floats flys very well, with enough power for a loop.

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RE: O.S. FS26S question - 11/29/2003 8:16:14 PM   
jaka


 

Posts: 4638
Joined: 12/11/2001
From: Upplands Vasby, SWEDEN
Status: online 		Hi!
Yes I agree with you that the OS.26 will work fine on the airplanes you mentioned...I'm in fact now building a Marutaka DC-3(started 20 years ago) (211cm in span )and plan to use two OS. 26 FS engines on it. Taking avery unnecessary wood piece away, making it very ligth. I aim for 3kg ready to fly)
But......the "usuall".20 trainer does not look like the ones you mentioned (at least those I thought of, ARF airplanes ). Many "ARF trainers" today are not that lightly built.
So its all about mating the right trainer to the right engine....

Regards!

Jan K

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RE: O.S. FS26S question - 11/29/2003 11:34:34 PM   
robb_h


 

Posts: 117
Joined: 12/1/2002
From: WARREN, PA, USA
Status: offline 		I had a O.S. .26 4-stroke, until I traded it last year. It was quiet and reliable (I don't ever remember it quitting); however, I always thought it was "torquey". Problem is, the plane has to be quite light to fly with this engine, and the inherent torque associated with a 4-stroke, really makes itself evident on such a small plane. I had mine on a Page Aviation Newbee, in addition to a Tidewater Playmate, and I always had to be careful of ground loops.

Robb

(in reply to jaka)
       Post #: 6

RE: O.S. FS26S question - 12/1/2003 2:31:55 AM   
AMB


 

Posts: 3947
Joined: 6/10/2003
From: winter park, FL, USA
Status: offline 		Had one ran very well but as stated not a lot of power bought a mag 30 4 strk(also 2 needle )
carb) more umpff sold the OS and bought an other mag 30 under the SC Tag from just engines
it is the same as magnum one of them is in a pacific aero model 30 size tiger moth running inverted with no problem (no glo driver needed) 11x4 wood zinger

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RE: O.S. FS26S question - 12/1/2003 2:35:31 AM   
AMB


 

Posts: 3947
Joined: 6/10/2003
From: winter park, FL, USA
Status: offline 		the OS 26 is now a 30

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RE: O.S. FS26S question - 12/1/2003 5:04:05 AM   
donkey doctor



Posts: 1205
Joined: 12/1/2002
From: Lake Cowichan, BC, CANADA
Status: offline 		Hello; I have had 4 or 5 of those lovely OS 26's, I've had them in Triainers Goldberg freedom 20, in a Clancy speedy bee I scratch built. in an Ace 4 20, I have a Saito 30 in a pober Pixie biplane. They are great engines, I usually use a 10x6 but for the speedy bee I found an old nylon 14x3 that suited the speedy bees design envelope very well. The earlier OS 20's were pretty close to the 26 in performance, I hear that the new 30 is quite a bit more powerful then the 26, although I have no experience to prove it. Oh yes I also have a HP 29 four stroke I have used in a Dynaflite, Piece of cake, I like those little 4 strokes.

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       Post #: 9

RE: O.S. FS26S question - 12/1/2003 8:38:47 PM   
maxtenet



Posts: 708
Joined: 10/18/2002
From: Towson, MD, USA
Status: offline 		Have one in an Ace 4-20. Nice little engine, very quiet! They just bored 'em out so now they are the FS .30. Should be a good engine. Might want to take a look at the HP .21 Four stroke from MECOA. These things are like watches and are so quiet you can't tell they're running. My dad was using an electric starter on one of the HP .49 four strokes and thought he was having trouble starting it. He removed the starter and the prop was spinning and the engine running, you just couldn't hear it.

Max

< Message edited by maxtenet -- 12/1/2003 8:41:08 PM >

(in reply to donkey doctor)
       Post #: 10

RE: O.S. FS26S question - 12/1/2003 10:17:04 PM   
Jackster00


 

Posts: 148
Joined: 3/8/2003
From: Caledonia, IL, USA
Status: offline 		I'm going to build a Goldberg Freedom 20. Sorry I failed to mention. I saw an O.S. 26 on E-Bay that I was tempted to bid on, but alas, the price got a little higher than I wanted to pay. Would rather buy a new 30 and be done with it. I may even throw an O.S. 40 on this plane. There's only 3 oz. difference between a 40 & 30, and 1" difference in prop dia.'s (the same dia. if I use a 3-bladed prop). I already have a 40.

Jackster

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RE: O.S. FS26S question - 6/15/2008 8:30:59 PM   
Mr. Mugen



Posts: 5779
Joined: 3/24/2006
From: Ishpeming, MI, USA
Status: offline 		I just snagged one of these up. I would like to make a small 3d nitro. I see tons of BIG planes but no tiny 3d flyers....at least in nitro. Anyone fly 3d with their 26?

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RE: O.S. FS26S question - 6/16/2008 2:40:41 AM   
w8ye



Posts: 17882
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: online 		You might look at some of the "25E" electric planes?

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Original AMA #31261

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       Post #: 13

RE: O.S. FS26S question - 6/16/2008 4:05:21 AM   
scott17



Posts: 134
Joined: 12/30/2006
From: Bedford, TX, USA
Status: offline 		I have a ModelTech Mini Magic Extra with an OS 30 in it and it flies great!!!

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RE: O.S. FS26S question - 6/16/2008 4:51:44 AM   
Mr. Mugen



Posts: 5779
Joined: 3/24/2006
From: Ishpeming, MI, USA
Status: offline
quote:

ORIGINAL: w8ye

You might look at some of the "25E" electric planes?



I have about 30 electric planes already and am happy with them but........why not a 3d nitro? Is the power of this engine too little? I have no idea....shooting in the dark. Thought maybe a mini edge 540 with a 35" span might fit the bill? Or a small extra? Am I off base here?

Kevin

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RE: O.S. FS26S question - 6/16/2008 6:05:07 AM   
w8ye



Posts: 17882
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: online 		The OS26 is not the most powerful four stroke in the weight range.

They make a OS30 that is the same physical size and has more power.

The Saito 30 has more power than the OS30

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Original AMA #31261

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