New - OS GF-40 Four stroke gas engine! - RC Groups
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Oct 27, 2012, 05:12 PM
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gkamysz's Avatar

New - OS GF-40 Four stroke gas engine!


I'm going to guess the price will be 799 at Tower.

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Oct 28, 2012, 08:44 AM
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Oct 29, 2012, 01:58 AM
Registered User
But if those number are true then its going to be an awesome engine for pattern!
Oct 29, 2012, 07:03 PM
Registered User
Very nice looking engine . I would sell my 1st born for one of those ! cheers the pope
Oct 30, 2012, 02:14 AM
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I would also sell his first-born for one of those.
Oct 30, 2012, 08:17 AM
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gkamysz's Avatar
The power figures do look good. It will likely be 4-6 months or more before we see these anywhere.

Oct 30, 2012, 08:57 AM
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I have time
Oct 31, 2012, 02:34 AM
Grumpa Tom
Kmot's Avatar
That engine sure is purdy lookin'

Did you guys see the PDF?
Oct 31, 2012, 03:59 AM
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waiting for an english version
Oct 31, 2012, 10:27 PM
Gas Only
Fokker DII's Avatar
Oct 31, 2012, 10:34 PM
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williame3590's Avatar
A sign of things to come I think. Time to start the fund!!

Nov 03, 2012, 04:28 PM
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The PIPE's Avatar

It MIGHT be closer to $900 for that mill in the USA, when it gets here...

Dear Gkamysz:

The PIPE here...I just did a currency conversion from yen to US dollars for the price on that new OS GF-40 four-stroke gasser mill...

...and I was shocked to find we've possibly got a price, using current conversion rates, of some $887.25 for that new GF-40 mill.

Now, I KNOW I shouldn't be "complaining", as the GF-40 seems like a mill that's expensive enough to have the saying that "if one has to ask how much it costs, one can't afford it" be a very true statement. Then again, in my case, I'd lke to be able to spin, say, a 22 x 6 or 22 x 8 inch prop with a mill like that for WW I quarter scale flying someday with a fully-scale-layout, lightly built airframe. The existing Saito FG-36 four-stroke gasser mill has a 32.00mm stroke figure, with the new OS has a VERY slightly shorter stroke of 31.8 mm. And where the stroke CAN be a big determinant in the output torque of the mill, that IS an important figure to know.

And "no", I can't read the kanji script of the Nihongo (the Japanese language's own name for itself) in that PDF file, but I just "did the math" to get the swept volume (radius of cylinder bore squared times pi, then times the stroke) from the figures in the PDF ad, and the 31.8 mm stroke figure works out nicely for the GF-40, with a resulting 39.96 cm3 of displacement.

However, IF one's got their heart set on the new OS GF-40 "putt-putt gasser mill", START could be as high as $889.00 when it finally gets here. or even higher......I'm just hoping that I'm wrong about that !!

Yours Sincerely,

The PIPE....!!
Last edited by The PIPE; Nov 03, 2012 at 04:40 PM.
Nov 03, 2012, 06:28 PM
Registered User
Howdy over here in Aus the saito 36 is nearly $700 . I imagine the os will come down in price somewhat . IAs the wise ole pipe says start saving and thats my plan . I now have enough glow ,4st , saito twin and petrol engines to last a lifetime so from now I will just concentrate on engines like the os 40 and if I can get one of those Im done ! Well thats what I say anyway but it doesnt seem to work that way . Cheers the pope
Nov 03, 2012, 06:30 PM
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gkamysz's Avatar
Dearest Pipe,

GT22 is 36,000 Yen and it's priced less than the ~450USD the exchange rate would indicate. That's MSRP. I have nothing against their pricing. If you want OS, you have to pay for OS. We all know a difference of just over half a percent in stroke means nothing in performance. Saito also has a FG-40 slated. I'm sure the prices will be similar.

Nov 04, 2012, 05:38 AM
Registered User
turk1's Avatar
Hi ANZAC, keep an eye on HiModel site (or Agape) these days,NGH 38 4 st gassers will be on sale soon(batch despatched).I know you love NGH so I want to inform you

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