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Old 05-19-2003 | 11:53 AM
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Default GP Ultimate 40 Engine Preference?

I recently bought an OS52FS Surpass engine for the GP Ultimate 40 kit. Now I'm having second thoughts. Everything I've read indicates this model builds heavy, and every time I read that, I get those second thoughts on the 52.

What do you think about either staying with the OS52, going with a Saito 72 or a YS63? Or should I just mount a Saito 91?

I already own a Saito 91, but not the 72 or 63. The 63 is rated at 1.5hp, while the 91 is rated at 1.6hp; and the 91 is only .3oz heavier than the 63...so that's why I'm considering the 91.

Tell me what you all think.
Old 05-19-2003 | 01:58 PM
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Default GP Ultimate 40 Engine Preference?

My Saito .91 is destined for my GP Ultimate Kit.
Old 05-19-2003 | 03:11 PM
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Default GP Ultimate 40 Engine Preference?

All I can say is: HOLD ON!
Old 05-20-2003 | 05:52 AM
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Default GP Ultimate 40 Engine Preference?

Using an OS 70 FS on mine!
Old 05-20-2003 | 12:59 PM
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Default GP Ultimate 40 Engine Preference?

Hisham...how did the CG setup with that engine? How does it fly?
Old 05-20-2003 | 01:12 PM
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Default GP Ultimate 40 Engine Preference?

I've a FG cowl in front,
so less weight than the supplied ....
Flights are cool !
Old 05-23-2003 | 02:16 AM
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From: St John IN
Default GP Ultimate 40 Engine Preference?

have a thunder tiger .91 4 stroke in mine, ballanced perfectly . flies great.
Old 05-23-2003 | 10:44 AM
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From: Terrell, NC
Default GP Ultimate 40 Engine Preference?

OS .61 on mine, w/ elevator and rudder servos on the outside in front of the tail feathers. Balanced perfect, but I dumb thumbed it into the ground, and haven't repaired it yet.
Old 05-29-2003 | 11:48 PM
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Default GP Ultimate 40 Engine Preference?

Decided to go with the YS63FZ...

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