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Old 09-21-2009 | 11:23 PM
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zain
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From: richmondbc, CANADA
Default RE: What four stroke in a 40 sized warbird.
YS 63s will give you more then enough power to fly any 40 size airframe. Great engines once you get them tuned out correctly, if you do not have any experience with YS then get someone at your club who does to help you out with them. They run great inverted as well.

Zain
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