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Old 01-27-2004, 02:28 PM   #31
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Hi Gary,

just an additional comment, you might want to re-enforce your firewall prior to adding on a bigger engine to ensure it stays solid with the vibration. As an example, if there is no triangle stock inside (just remove the gas tank to see) as a min your should add some of that with epoxy for re-enforcement. Yes it adds a bit of weight but it could stop the engine taking off and the plane staying still

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Old 01-27-2004, 04:01 PM   #32
Gary Maker
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LOL, thanks Bob, I will definitely do that! I think I am going to go with a Saito .72 for the J3 Cub I got from you. Should fly it real nicely! What do you think?

Man, the great information keeps coming, thanks so much guys! I have really been given a lot to think about and work through.

Jim, I appreciate very much the specs on weight to thrust ratio and wing loading.

Chad, awsome info on how you relate engine size to plane size, never really thought of how very important proping could be. Just always picked a prop within the mfg recommendations and went with that, something I am going to really experiment with.

Don't want to leave anybody out so thankyou all for great comments and a great thread.
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Old 01-27-2004, 04:57 PM   #33
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Re: How much Power is too much?

Originally Posted by Gary Maker
I am sincerely asking this question because I would like to have some input on this. I would like an honest discussion and reasoning on this.

Its ok to like power. And I have honestly heard some people say "Too much power is just right!" I've seen people put much higher than recommended engines on planes and would honestly like to know - How much power is too much?

Heres just a couple of examples:

Goldberg Extra 300. Recommended engines are .60 two stroke to 1.20 4stroke. I have seen these planes with 1.08 to 1.20 2stroke and 1.50 to 1.80 4strokes. Twice the recommended power in some instances.

For more modern planes and engines theres the new Wild Hare Edge 540. This is a 28% scale plane weighing 17 Lb . I have heard its designed for engines like the G62, ZDZ 50, DA50 etc. Most of us have heard of the powerful new MVVS 58, 9HP, with 48lbs of thrust swinging a 26 X10 prop. These engines are being purchased for this plane with all most twice the recommended HP.

Is too much power just right for these planes? Where do you draw the line on how much over powered you can go these days! Is safety an issue here?

This is not meant to be a criticism or to start any heated argument. I would really like to know how you determine how much power is reasonable!

Thanks in advance for your comments.
Well Gary, I can give my opinion as I do have a Goldberg Extra 300 and it has an ASP 1.08 in it now. Problem is, that engine will never hang the plane or do some other 3D maneuvers. I'm planning on looking for a used Webra 1.20 to put in it but have other planes to work on first. I want it to be a 'practice' plane for learning before I do anything daring with my H9 Extra, and I'll need the 1.20 to do that. I couldn't imagine flying this thing with a .60 in it, but I guess many would find a .60 fine. It's all about what you want to do with it.
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