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Old 08-23-2009 | 08:25 PM
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Charlie P.
 
Joined: Feb 2003
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From: Port Crane, NY
Default RE: Replacing a 46 ax with 4 stroke
I've heard you should multiply the displacement of a 2-stroke by 1.5X to find a suitable 4-stroke. That gives .69 . . . and I have swapped OS 70 IIs for Thunder Tiger Pro-46s in three airframes with very suitable results so I think it's a good rule of thumb.
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