Air Hobbies 50cc/3.0 twin
10-14-2011, 01:14 PM
#1
Air Hobbies 50cc/3.0 twin
Greetings,
AIR HOBBIES TWIN 3.0 CU/IN.
This engine runs awesome, I have taken very good care of it, seals replaced...IT KICKS BUTT!. I HAD IT ON AN 84" WINGSPAN staudacher g-300 and now the airplane is gone. I was wondering what you guys thought I should put this engine into? I want to build something from plans and break in my new vertical bench top band saw. I was thinking along the lines of a golden classic, or maybe a warbird with retracts. Or maybe just a large sporty bird? This engine swings a 20-10 through 22-8 propellor. It is lightened up from the stock configuration as you can tell in the pictures, lighter exhaust cans are custom welded and the original standoff mounting system removed and lightened aluminum plate installed instead. The whole package engine weighs in at just under 3 pounds with ignition (no battery). Custom C H custom ignition with conversion down to 10mm CM-6 plugs gives this engine a horizontal footprint of 9" (total width plug cap to plug cap). History: Many of these were built and manufactured in the USA. Two Sachs-Dolmar 25cc cylinders were utilized with Boxer style stroke. (Both pistons hit top dead center at the same time...reduces vibration).
I think that's enough classified info. I would appreciate feedback on this matter. Please stay focussed on the objective.
"Whilste the nose is pointed south, thou shalst reduce thy power before earth rises up to smite thee"
Sincerely,
Steve H.
AIR HOBBIES TWIN 3.0 CU/IN.
This engine runs awesome, I have taken very good care of it, seals replaced...IT KICKS BUTT!. I HAD IT ON AN 84" WINGSPAN staudacher g-300 and now the airplane is gone. I was wondering what you guys thought I should put this engine into? I want to build something from plans and break in my new vertical bench top band saw. I was thinking along the lines of a golden classic, or maybe a warbird with retracts. Or maybe just a large sporty bird? This engine swings a 20-10 through 22-8 propellor. It is lightened up from the stock configuration as you can tell in the pictures, lighter exhaust cans are custom welded and the original standoff mounting system removed and lightened aluminum plate installed instead. The whole package engine weighs in at just under 3 pounds with ignition (no battery). Custom C H custom ignition with conversion down to 10mm CM-6 plugs gives this engine a horizontal footprint of 9" (total width plug cap to plug cap). History: Many of these were built and manufactured in the USA. Two Sachs-Dolmar 25cc cylinders were utilized with Boxer style stroke. (Both pistons hit top dead center at the same time...reduces vibration).
I think that's enough classified info. I would appreciate feedback on this matter. Please stay focussed on the objective.
"Whilste the nose is pointed south, thou shalst reduce thy power before earth rises up to smite thee"
Sincerely,
Steve H.
10-14-2011, 05:10 PM
#2
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RE: Air Hobbies 50cc/3.0 twin
You deffinately get cool points for this engine. A 50cc under 3 LBS that is not a DA? And it's a twin cyl? Me thinks your scale is broken
Just kiding. If you went warbird you would want a round cowled model such as a Corsair or maybey a Thunder Bolt. I have always liked the P-47 Razor Back model. You just need to find one with a 9+ inch cowl. If your into aerobats then a Yak or a Sukoi might work for you as well.
Just kiding. If you went warbird you would want a round cowled model such as a Corsair or maybey a Thunder Bolt. I have always liked the P-47 Razor Back model. You just need to find one with a 9+ inch cowl. If your into aerobats then a Yak or a Sukoi might work for you as well.
10-15-2011, 04:27 PM
#6
RE: Air Hobbies 50cc/3.0 twin
I had a very disappointing experience when I purchased a new engine from their booth at the Toledo show. Never was able to get it to run good enough to put it in anything. Absolute lack of support. Ended up being an expensive door stop. I would not recommend them as a sinker maker much less an engine manufacturer.
Dennis
Dennis
10-15-2011, 06:48 PM
#7
RE: Air Hobbies 50cc/3.0 twin
Yes,
But this engine hauled around a 19 lb Staudacher very nicely! Albeit after replacing the seals which seemed to be damaged during assembly, new seals are still available. However, it still runs excellent! It's favorite propellor is a Bolly carbon 21-10. I know Bolly is out of business but a suitable mejzlic, or pete's will do.
But this engine hauled around a 19 lb Staudacher very nicely! Albeit after replacing the seals which seemed to be damaged during assembly, new seals are still available. However, it still runs excellent! It's favorite propellor is a Bolly carbon 21-10. I know Bolly is out of business but a suitable mejzlic, or pete's will do.
10-15-2011, 07:13 PM
#9
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RE: Air Hobbies 50cc/3.0 twin
ORIGINAL: Steve S. Helland
The objective question still remains...Who knows what plans have a round cowling that is around 9'' in diameter?
The objective question still remains...Who knows what plans have a round cowling that is around 9'' in diameter?
He has plans for almost anything with wings. When you order from him he sends you the plans in an email and you can take them to Kinkos and have them printed in any size you like. Then you send them to a laser cutter and have a short kit cut for yourself.... Unless your a masacist and want to cut all those formers and ribs yourself[:'(]
05-27-2019, 11:30 AM
#13
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Questions about Air Hobbies engine
Hello, everyone, I know this is a very old thread, but it has some info I could not find anywhere else. I have found out that an old twin cyl engine I bought at a swap meet years ago was made by Air Hobbies, only because I put some blueing on it and the logo jumped out at me, had not seen it before. I have a few questions, #1, is this the original crankshaft ? When I got this engine the crank pin had come loose and I rewelded it. #2 Would a modern day crankshaft fit it , like a XYZ 53 twin ? #3 has anyone else put different cyls on this engine ? I really don't think I will be putting it on a plane to fly, but a running display would be cool. #4 Anywhere on the web I can go to and get some info on this engine
Had this engine for years but never saw this, it is very lightly stamped.
No counter weights is what I wonder about.
Had this engine for years but never saw this, it is very lightly stamped.
No counter weights is what I wonder about.
