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what size engine?

Old 03-04-2013, 06:17 PM
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lasko220v
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Default what size engine?

I have a 80 inch hanger 9 cub and an older OS four stroke 61. Would this engine be a good fit for this plane or is it too heavy. Anybody....thanx.
Old 03-04-2013, 06:36 PM
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vpresley
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Default RE: what size engine?

hmmmmmmm What do the instructions say???


Vince
Old 03-04-2013, 06:39 PM
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speedracerntrixie
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Default RE: what size engine?


ORIGINAL: lasko220v

I have a 80 inch hanger 9 cub and an older OS four stroke 61. Would this engine be a good fit for this plane or is it too heavy. Anybody....thanx.


Uhhhh I don't think so Tim.....................If you need to buy and engine you may want to look at some of the 30cc gassers

Old 03-04-2013, 06:43 PM
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da Rock
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Default RE: what size engine?


ORIGINAL: lasko220v

I have a 80 inch hanger 9 cub and an older OS four stroke 61. Would this engine be a good fit for this plane or is it too heavy. Anybody....thanx.

Cubs are often setup with smaller engines for their size, but that just might be too small for the model.

The engine ought to swing something like a 13x6 or thereabouts.
Old 03-04-2013, 06:55 PM
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Default RE: what size engine?

I think that engine would be too small
Old 03-04-2013, 11:18 PM
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52larry52
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Default RE: what size engine?

I have to disagree with those who said that an O.S. .61 4 stroke was too small for your H-9 81" Cub. I have two similar size 1/5 scale Cubs and both would have the O.S. .61 4 cycle right in the middle of their engine range for 4 strokes. The Thunder Tiger Cub ARF ( 82" w.s.) calls for a .50-.91 4 cycle and the Great Planes Cub ARF ( 81" w.s.) calls for a .52-.70 4 cycle. Both of mine are powered with O.S. .46 FX 2 cycle engines and have plenty of power for takeoff from grass and fly at 1/2 throttle once airborn. I fly my Cubs in a scale fashion, not as "hot rods". If your flying style and intentions for the cub are to pretend it's an Extra 300 then I would advise something like a .90 size 4 cycle. For "normal" Cub flying with an occasional loop and a roll your O.S. .61 will be fine.
Old 03-04-2013, 11:39 PM
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JohnBuckner
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Default RE: what size engine?

Have to agree with Larry I had the first version around fifteen or sixteen years ago and it flew very well with a K&B Screamin .48 and many of the fellows powered that original version with .50 or .56 Saitos which were quite popular.

Stripped mine of its yellow overcoat though and covered it all black with with Yellow lightening stripes!

John
Old 03-05-2013, 04:33 AM
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ronwc
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Default RE: what size engine?

The 61 will be fine - Cubs fly on the wing - http://www.hangar-9.com/Products/Def...ProdID=HAN4000
Old 03-05-2013, 09:43 AM
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Gray Beard
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Default RE: what size engine?

Sounds like about the perfect engine for it to me. A Cub requires very little power to fly well and the 61 should be a good fit.
Old 03-05-2013, 06:36 PM
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jester_s1
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Default RE: what size engine?

I have that plane with a Magnum .52 4 stroke. I call it "scale powered" as the original Cubs had just enough power to get off the ground and maintain altitude, as does mine. I just can't take it out when there's more than about 7-8 mph of wind without having some tense moments with it getting tossed around and sideslipping. If you want scalelike flight and scalelike power the OS 4 stroke will be fine. I take it this is one of the old .61's they made back in the '80's with the air bleed carb? I had one that I could never get to idle right. An onboard glow driver fixed it, but I always wished that OS had included a double needle carb on that engine.
Old 03-06-2013, 04:21 PM
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biam
 
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Default RE: what size engine?

I agree with the last three posts, that engine would be fine, dont be afraid to use it.
Old 03-06-2013, 06:07 PM
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Default RE: what size engine?

I agree that the .61 will be just fine. I clipped the wings on mine and flew it with a Saito 65, very nice mild aerobatics.
Old 03-07-2013, 07:33 AM
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Default RE: what size engine?

Hi!
That engine will be just perfect for a slow flying CUB. Prop it right with a 13x4 ,13x5 APC, RAM or Graupner "Cam-prop" or "Sonic"!
Old 03-08-2013, 08:23 AM
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daveopam
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Default RE: what size engine?

One other thing to keep in mind, some Cubs need nose weight to get the CG right when using a smaller engine. So plan on getting your battery and other weight as far forward as possible.

David
Old 03-08-2013, 10:09 AM
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Warbird40
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Default RE: what size engine?

Your .61 will be excellent for it! I have a GP 81" Cub with a Saito 65 and it flies scale at 1/2-3/4 throttle. On most planes you have to use the upper range of the recommended engine size, not the case on the cub.

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