OK guys.....here's the heli mount system:

Making the helicopter frame mount that attaches the helicopter frame to the fuselage:

I bought two pieces of basswood (hardwood):
#1. 1" wide x 1/8" thick x 3ft long
#2. 1" wide x 1/4" thick x 3ft long

You will need four 6-32 blind nuts and four 6-32 pan head screws as well as four rubber washers found at any local hardware store.

Make the following pieces to be assembled:

Base (the piece that attaches to the helicopter) 2-1/2" long x 1" wide x 1/8 thick (make 2 of them)

Stand off pieces. Using the 1/4" thick stuff, 2-1/2" long x 1/2" wide x 1/4" thick (make 5 of them)

Front piece using the 1/8" thick stuff 2-1/2" long x 1/2" wide x 1/8" thick (make one piece)

This is going to be a stack build of the mounts starting with the front mount.

Take one of the 2-1/2 x 1/2 x 1/4 pieces. Measure from the end of the block 5/16 from the end tword the center (do both ends of the block) and mark it in the center of the block. So, that would be from the end 5/16, and 1/4 from edge to center.

Note: You can elect to clamp them together to drill, or drill each block. I recommend making precise measurements and drilling each block because hard wood sometimes likes to split. Use a 1/16 pilot drill bit first, and then drill with a 3/16" drill bit.
Repeat the above and drill the 2-1/2 x 1/2 x 1/8 piece that will be used on the front mount.

Drill all 5 of the 2-1/2 x 1/2 x 1/4 blocks, and then stack them to ensure they're right do the same with the one 1/8" thick block....match 'em up and you can see all the way through on both sets of holes.

Now....while you're thinking about the next step, take the blind nuts and put a drop of oil down the threads...you know why.

Take two of the 2-1/2 x 1/2 x 1/4 blocks, and get the blind nuts together. Using a large drill bit (I used a 23/64" bit) Counter drill the existing holes so the blind nuts will fit flush in the two blocks. Apply a drop or two of epoxy into the counter drilled holes, and press the blind nuts in, and ensure the 3/16" holes are clear, use a Q-Tip to get rid of the excess....let it cure. You should be able to lay one block over the blind nut block and have a perfect flush fit.

Assemble the front mount. Using epoxy sparingly, place the blind nut block (flange tword base block) lining up the forward edge, then add the next 2-1/2 x 1/2 x 1/4, and then add the 2-1/2 x 1/2 x 1/8 block....line them all up. At this point, I clamped it in a vise and allowed it to cure, wiping the squeeze out epoxy with a rag that had alcohol on it before it dried.

After it's cured, mark for the holes to attach it to the heli frame and drill. I have the stand off blocks forward. You build the rear exactly the same way except instead of using two 1/4" pieces and a 1/8 peice like you did on the front, on the rear you use three 1/4" pieces stacked...it gives proper angle.

For the mounts, you could fabricate anything you like....it don't matter. As long as the heli frame sits in the fuselage correctly, and the boom of the heli is centered in the boom of the fuselage...and the heli frame is securely attached to the mount and the fuselage.




See pics of blocks I made. I will cover setting retracts next because you cannot mount the heli to the fuse without allowing clearance for the rear retract servo which needs to be installed first.