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Need Help with a Engine/Weight Issue

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Old 01-22-2003, 07:19 PM
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RCKevbo
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Default Need Help with a Engine/Weight Issue

Hello All: I just finished rebuilding a .60 size Top Flight Corsair. It was a "hand-me-down" and I had to do a lot of rebuilding to get it flight ready. I'm ready to go, but I have had some trouble establishing the CG. I had to add weight to find the recommended CG. This brought the plane up to exactly 10lbs. I have installed an OS 70 Surpass engine (4 stroke), and I'm wondering if that will be enough engine to pull this plane around. I'm not looking for spectacular performance, just enough to fly it easily. Anyone have any thoughts?

Thank you.
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Old 01-22-2003, 07:23 PM
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BingoFlyer
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Default Need Help with a Engine/Weight Issue

The OS.70 Surpass should fly your Corsair fine (not spectacular) I've seen one with a .91 Surpass and it was spectacular.
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Old 01-23-2003, 10:33 PM
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LawDog101
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Default Probably not.

The TF website states that the Corsair kit max weight with all accessories is 9.5 lbs. The smallest 4s engine recommended is a .91. There is a pretty big difference between the .91 and the .70 OS. I would relly hate to have a nice scale plane, that is only flyable at full throttle. The other problem is that it may not be able to swing a big enough prop to get it past the cowl. Take my Extra .60 (62" WS @ 8.25 lbs) for example. I fly it with a .91 two stroke which flies it great, but it only flies OK with a .60 two stroke. I really wouldn't want to fly it with a .70 four stroke and it is 1.25 pounds lighter than your plane. Just my thoughts, but I usually try to stay in the power range TF recommends.

James
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