A fully detailed build of an INTERCEPTOR 400 Helicopter 
complete with the Alien Command (Standard)
Auto pilot system

Page 10

   

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Assembling the Frame

Lower Frame

Shown above are the parts required to assemble the LOWER FRAME. As previously with the upper frame, I suggest that you sort the screws out into three different piles to ensure that you use the correct ones as relevant, and get the spacers in separate piles too.
Get the plastic lower tray, insert one of the long alloy tubes through one end, place it on the rear of the frame, and fit a screw in each end.  Note the screw is a threaded screw, NOT a self tapping screw.
Note the direction the tray is fitted. The FRONT of the frame is to the right, the REAR is to the left in this picture.
We are now going to fit the motor mounting tray in position. You can do this with or without the motor being fitted to the tray.

As you can see, the motor mount tray fits on the upper side of the FRONT of the lower frame as shown in the picture on the left.

Make sure that you insert the tray the correct way up, with the mounting lugs pointing DOWNWARDS.

DO NOT apply thread lock just yet, just secure it loosely with Nuts & Bolts by the rearmost mounting holes only.

Spin the engine mount over forwards to align the forward holes in the frame with the lugs, and secure tightly with nuts & bolts - using thread lock on the nuts.  Return to the previous two screws and thread lock these as well and fully tighten.
Next we will fit the short battery tray. Use nuts & bolts, but just pinch them up and do not thread lock at this time.

Note that the first screws go into the forward most of the holes in the frame only, and also into the forward most holes in the tray.

This next part can be a little fiddly...

We are going to fit the two parts of the main frame, the UPPER and LOWER, together.

Look at the picture below right, and you will see that we use the alloy spacers in various combinations to achieve a good strong frame.  Balancing the frames and the spacers and the bolts can be a bit of fun, but you can do it.....

Now we need to add all the alloy spacers to the lower frame assembly.  These all use the long bolts & nuts.  Locate a spacer with a bolt as shown, then pass the bolt through the correct hole in the upper frame, add a second spacer between the frame sides, and finally, a third spacer on the other side.  Pass the bolt all the way through and add a nut on the other side - USE THREAD LOCK ON THESE and tighten fully.

The end result should look like this, with the entire upper frame being able to pivot on the bolt and spacers just add. (unless you tightened them up too tight that is)
Pivot the top frame DOWNWARDS and align the holes at the rear of the LOWER FRAME with those on the UPPER FRAME as shown on the right.

Repeat as previously with three spacers in total through both fitting holes.

Push bolts all the way through, THREAD LOCK them, and tighten fully.

The end result we are looking for is as shown on the left.

GO BACK AND CHECK THAT ALL THREE SETS OF LONG BOLTS ARE FULLY TIGHTENED AND THREAD LOCKED.

      
Here is the end result that we are hoping to see ?

Does your frame look like this ?

If so, great job, have a scotch or something to celebrate your hard work.

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