Threadlocker for plastic motor mounts
 

Anyone know what you can use for treadlocker on the glass-filled nylon (?) motor mounts from Great Planes and others? I tapped the mounts for 6-32 bolts and want to make sure they do not come loose. I recall Loktite will eat plastic. Can't really put a safety nut on the bottom as the mount is not flat there. Could have stopped the tap a little earlier to create sort of a Nylok effect but only thought of that after I tapped them!

Murray

Threadlocker for plastic motor mounts
 

Murray,

What I have done is flatten out the bottom with a dremel and added locking nuts. Never had one fall off.

Threadlocker for plastic motor mounts
 

I usually do as beachflier says, but this one may work
Loctite 425

Threadlocker for plastic motor mounts
 

Blue loctite works fine . I always use it on my airplanes parts without anything bad happening. I don't know who started spreading these funny rumors about loctite eating plastic :- (=)

Threadlocker for plastic motor mounts
 

forget the thread locker.....when you tap the holes, stop when the tap peeps through the bottom of the hole, then let the bolt cut the last three threads....it will never back out....

Threadlocker for plastic motor mounts
 

Good idea eugene. but loctite still comes in handy when you have bolts and nuts

Threadlocker for plastic motor mounts
 

I use lock tite on everything!! You might say that I am a lock tite man. But with glass filled mounts, I just use socket head sheet metal screws and a lock washer. Those sheet metal screws are hard as heck to get in there and so far, I haven't had any trouble with one coming loose.

Threadlocker for plastic motor mounts
 

Thanks for the tips, guys. Since the bolts come all the way through the mount, I'll go with a loctited safety nut.

Murray

Cowl Mounting Blocks
 

Here is a great tip I got from a friend on how to install cowl mounting blocks. As shown in the picture, you drill a hole in a piece of hardwood. Then insert and glue in a piece of Golden Ny-Rod ( you never use all of it for push rods). Now you can use servo mounting screws to install the cowl. The screws fit tightly into the Ny-Rod and will not back out (self-locking). They don't require blind nuts or loc-tite and will hold up to numerous insertion and removal of the screws. Besides which, they are cheap and easy to fabricate.

To prevent stress cracking of plastic and fiberglass cowls, you can also drill the holes in the cowl large enough to insert the rubber grommets used on the servos. Paint the outside of the grommet the same color as the cowl and it looks pretty good. Not exactly scale, but works well for most sports flyers.
I'd Rather Be Flyin'
Vic