ORIGINAL: JohnBuckner
Of key importance in any pull/pull installation is for the two surface horns clevis holes to be lined up perfectly laterally and through the exact hingeline of the surface. If there is any discrepancy in the alignment either fore or aft then differential will be induced and there will be a slack line situation on movement in both directions.
For all practical purposes the chief reason for pull/pull is to save weight aft of the CG for airplanes that may have tail heaviness problems. That sure applied to my Balsa Nova I built some years back. The Morris kits lumber was overly heavy at least in mine and the structure was a bit overdone. Take care in your CG considerations and the airplane is a great flyer however you will enjoy it. I recently gave the old bird away to the gentleman in the photo and he is sure enjoying it.
John
thanks, mine is the 40 size. I see that you mounted the engine upright. Any particular reason? I guess my biggest concern with the pull pull is where to drill the hole in the fuse. The slots for the elevator rods are precut, but can't find anything for the rudder cables.