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Old 05-23-2006, 10:07 AM
  #58  
dgliderguy
 
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Default RE: CMPro Lancair

Joee75,

First, the supplied hinges are not fiberglass. They are a thin polymer plastic that has been surface-impregnated with poly fibers (hair) for absorbing CA glue. They are colloquially called "CA hinges", and they are the best thing to happen to this hobby since the invention of CA glue. Throw away all your pinned hinges. You won't be needing them anymore.

Second, DO NOT use the supplied hinges with this kit. The instructions include a blurb that they are intended for "display only" (meaning somebody goofed in the Materiel Dept. and got the wrong gage thickness). IOW, they are way too thick to work well. Keep them for future use, such as reinforcement for screws in fiberglass, etc. Go to your LHS and get the Great Planes CA hinges: http://www2.towerhobbies.com/cgi-bin...&I=LXK110&P=ML

You will find that CA hinges are far easier to install than pinned hinges, as there is no hinge line to get glue gunked in there. Just cut slots for the hinges, drill a hole in the middle of the slot width that will allow the CA glue to flood the slot once the hinges are in place, and then assemble the hinges and control surfaces dry. Close the gap between the control surface and the parent surface, then actuate the control surface through its range of movement to establish a clearance gap. Then just run some dribbly CA glue (aka, instant CA) in the hinge and wait a few moments while the glue cures. Done. No possibility of misalignment or binding, since the hingelines are 'blind', and they can hold up to any amount of abuse. Great concept, IMO.

My Lancair is almost ready for its maiden flight, will happen this weekend. Yeah, baby!

Don.