Comment

Comment by Brian A Manlove on December 2, 2013 at 12:40pm

The bearing block mod:

1. Countersunk holes just deep enough to allow about 1/8" of fill between bolt head and surface of the bearing block (bolt has an AN washer also).  
2. Liberally coated shank & underside of bolt head with JB Weld epoxy.  
3. Pressed bolts in
4. Filled over recessed bolt head with JB Weld.  
5. Sanded flush after epoxy dried.

This gave me more of a "motor mount" style of mounting the bearing block and allows use of AN lock nuts that don't need to be safety wired.  Also the bolts can't possibly be pulled out from underneath.  The wing brackets wrap around under the fuselage attach bracket, so now the long front AN3 bolt is carried by the bracket and not just going through plastic only - and it is now mechanically attached to the air frame. 

Total weight of mod: 2 aluminum brackets, about 2 oz. each = 4 oz.  Additional weight for AN4-7A vs the original bolts = approx.  .3 oz.   Total added weight for the mod = 4.3 oz.  

Additional confidence and less to think about = PRICELESS.  :>)