POC #13

Here's what I mean... 3mm holes drilled 30mm apart through the spar to secure our motor, of whichever size, without special brackets that hobby shops will cane you for. And to save on loctite I've used a strip of sellotape instead because we're not building Boeings here (Ed. maybe they do?).

POC #12

It's time to fit the motor, and to do this I use a technique that worked well enough on the multi-rotors that I've designed and built in the past. We'll be using just two of the four bolt-holes on the motor because (a) it's sufficient and (b) it leaves two spare if you strip the threads on these two, which is easily done given the diminutive size of the bolts. Normally these are tiny, and another advantage of driving them through the forward spar is that at least they've got a longer shank (3 x 30mm seen here).

The drive-shaft protrudes on this poorly-designed motor so I'll be using a couple of washers to lift it clear of the spar.

POC #11

The keel in place, filet each side with silicone or adhesive and leave to cure.

POC #10

Stick the foam panels beside the outline of the keel... and I've used leftovers here.

POC #9

Cut foam panels of this approximate size.

POC #8

Using the longer length of the deck, cut a pair of 24" (610mm) cross-bars and mark the position of them along with the keel.

POC #7

Pop a 'blow-hole' in the keel to evacuate the air from the back end.