Attaching the Dummy Engine to the cowling
After a few flight I've come to the conclusion that the plane is a little tail-heavy. Since the battery is already set at its foremost position, I need to add some weight to the front of the plane. The Dummy Engine weight about 70g so I hope it will do.
This it how the front of the plane looked before I set to work:
Note that the inside is the standard build, which leaves plenty of space for additional weight if later needed:
Here is how I attached the Dummy Engine parts. I think the outcome looks fine so if you like it you may wish to follow my footsteps. This might save you some time:
I used pencil to mark a line just above the dent in the cowling:
then I stretched the line and marked the beginning of the Dummy Engine at 40mm from the front of the cowling.
Then, I placed the part in place and marked where to drill a 2mm hole.
I attached the part using one of the 8 supplied 2mm bolts. I used one of the supplied wooden washers so the cowling does not crack.
Now the part is loosely connected:
The arrows point at the line I marked using a pencil and at the 40mm point I mentioned earlier.
Note that the Dummy Engine part is the LEFT part and that its exhaust pipes are at the bottom. It is important as the holes are not symmetrically spread.
Now is the time to mark and drill the remaining 3 holes and to fix the part in place. Do not tighten the bolts to firmly or it will distort the shape of the cowling.
Do not forget to use the wooden washers and to put a drop of "Loctite".
This is how it should look from the inside:
and from the outside: