RCU Forums - View Single Post - Engines and engine mounts being used in Classic Pattern Planes
Old 09-22-2015 | 06:06 AM
  #16  
flywilly
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From: glen allen, VA,
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I use 4-40 bolts on the front which are slightly offset towards the front to provide a little more distance between hole centers. Make sure the holes drilled are perpendicular the the mount surface (I use a jig) and tap carefully.