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Help engine air hobbies

Old 03-06-2015, 03:35 PM
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alejo2012
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Default Help engine air hobbies

HELLO FRIENDS I HAVE THIS AIR HOBBIES twin engine, GIFT OF A FRIEND AND NOT HAVE MANY CC? SOMEONE HELP ME KNOW EXACTLY MOTOR IS. THX
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Old 03-07-2015, 07:29 AM
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alejo2012
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In the cylinders have these R028131 150 a1
Old 03-07-2015, 10:23 AM
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rstearman
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Looks like a 4.8 twin, (cylinders and pistons are 2.4 Sachs), but need to know the cylinder numbers to confirm.
Old 03-07-2015, 11:12 AM
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alejo2012
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rstearman, thanks for responding, the engine has no more data already started, it says at the bottom of the cylinders R028131 150 a1, where should I look cylinder numbers that you say?
Old 03-07-2015, 12:03 PM
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rstearman
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Usually on the base of the cylinder.
Here's an image of a 3.2. 44ZN 16 W 3 Mahle exhaust mounting holes are parallel
Check your muffler mount hole location


Image of a 2.4 cylinder


3.2 cylinder
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Old 03-07-2015, 12:12 PM
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CARS II
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http://www.rcuniverse.com/forum/gas-...-cylinder.html


I found a thread here on RCU that may give more info, I met Tony a long time ago at Fresno jets.


Buena suerte con la maquina.
Old 03-07-2015, 01:27 PM
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alejo2012
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Exhaust mounting holes are not parallel .It is the same engine as the post you sent me
will try to operate it.
Thanks for the info guys. CARS II , rstearman,
Old 03-10-2015, 01:58 PM
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CK1
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At one time Airhobbies was located here in NC .I remember seeing them at flyins around the state and at Joe Nall. They had a great idea with the muffler mount but the engines were tight and lacked performance. A few friends had the 3.0 twins and were not very happy with them because of the weight and low power , they rarely hand started easily .
Best of luck on yours
Old 03-11-2015, 06:06 AM
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alejo2012
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I could not find in the forum data on engine power and propeller recommended, I can not comment anything about it yet, is that comments on the cylinders and pistons sachs are very good, I'm trying to find more data .
Tanks CK1
Old 03-11-2015, 07:43 PM
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Originally Posted by alejo2012 View Post
HELLO FRIENDS I HAVE THIS AIR HOBBIES twin engine, GIFT OF A FRIEND AND NOT HAVE MANY CC? SOMEONE HELP ME KNOW EXACTLY MOTOR IS. THX
Your friend must not like you much.Sorry about that.If your engine runs OK the Ignition will be very noisey RF noise.Might get by with 2.4 radio but not with FM or PCM.
Not too expensive to replace ign with new type with shielded spark plug leads and caps.
BCCHI
Old 03-12-2015, 02:43 PM
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alejo2012
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The plans put cdi, we do a test on a bench as well as this original just to see how it works lol. Now I'm repairing carburetors and since then I'll put up.
What still nobody could tell me is how many cubic centimeters is the engine, I'm not sure propeler use. Thanks

Last edited by alejo2012; 03-12-2015 at 02:51 PM.
Old 03-12-2015, 02:47 PM
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alejo2012
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rstearman.... My engine not have those numbers that you say me, what you have is unique registration and detail that ?????? as can be
Old 03-12-2015, 04:44 PM
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CK1
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I believe it to be a 4.8 80cc
Old 03-13-2015, 04:13 AM
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w8ye
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Overall, from reading posts on the Internet forums for the last 18 years, the Air Hobbies line of engines were not all that successful unless you were pretty much a engine builder yourself.
Old 03-13-2015, 09:49 AM
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alejo2012
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80 cc then ok ya know how many hp is too no? . CK1...
I hope he does not lack power, I would like to place it on a yak 55 2.35 mm wingspan. w8ye
Muchas Gracias a todos por la ayuda , I think the weekend I try it on a bench and then tell them how I was ....
Old 03-14-2015, 04:09 AM
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CK1
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I dont know what the actual HP is but I am sure that it will be a weak engine compared to any other of the same size.
Put a prop on it and bench test it. I wouls start with a 22x10 prop and work your way up from there if possible. I suspect you will need to put kits in those carbs and I would also replace the Ignition with an Rcexl or CH for reliability.
Old 03-18-2015, 08:05 AM
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alejo2012
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Already started the engine with a propeller 22x10 seems little power for a 80cc, but regulates and accelerates even I will keep trying with other helices and definitely will put cdi to see if it improves and is more reliable

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