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  • August 02, 2021, 05:08:47 AM

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Author Topic: Smallest 4 stroke glow available?  (Read 477 times)

Offline Dennis Toth

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Smallest 4 stroke glow available?
« on: May 05, 2021, 08:33:53 AM »
Just wondering what is the smallest commercially available 4 stroke?

Best,   DennisT

Offline Motorman

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Re: Smallest 4 stroke glow available?
« Reply #1 on: May 05, 2021, 09:34:25 AM »
I think OS Max made a .21


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Offline Robert Zambelli

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Re: Smallest 4 stroke glow available?
« Reply #2 on: May 05, 2021, 11:42:16 AM »
As far as I know, OS made the smallest 4S engine, a Non-Surpass .20.
I have a few of them and they're great little powerplants.
One of them is in my Cardinette* and besides pulling the plane quite well, it requires around 1 1/2 ounces of fuel for the pattern.
No muffler required, unbelievably quiet.
9-6 Master Airscrew plastic prop, Brodak 10-23, 50/50 castor synthetic, 55 foot .012 lines.
It was replaced by the Surpass 26 which appears identical in size and weight and has a tad more power.

Bob Z.

* plans may be available from Brodak.

Offline GERALD WIMMER

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Re: Smallest 4 stroke glow available?
« Reply #3 on: June 18, 2021, 06:08:46 AM »
Hello Small Four strokes that are currently available (and stocked) are the Saito 40A and the H.P.21 see:
http://www.mecoa.com/hp/vt/21.htm?id=2111
Regards Gerald

Offline Dane Martin

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Re: Smallest 4 stroke glow available?
« Reply #4 on: July 31, 2021, 07:43:50 PM »
Correct! OS made the smallest production 4 stroke,  the .20 . It was only produced one year, and it's actually not included on the official OS timeline. It was quickly replaced by the .26. Then, of course due to demand, tooling and general one-upsmanship, the .30 replaced the 26.

So that leaves the HP 21 as the current smallest production 4 stroke. It is, however, a little heavier. Very very cool engine though.


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