The kick off to build the new Knurrus Maximus was in May 2014 after crashing my old one (left side of the picture) for too many times.
I decided to go for a triple carbon rod stabilization on top and bottom. For the most glueing parts I am bettin’ on Uhu Por and partly on hot glue.
About 20 hours I used for cuttin’ out the form, shafts and tunnels with a scalpel for all electronic pieces and wirin’. As I didn’t want to cut through the entire foam for the battery shaft again the solution was to use the TBS 4S 3.3AH lipos instead of my old Turnigy 4S 5.0AH here in this picture. Flight time is still 20 minutes.
Furnishin’ the EPP with spray glue is always the most bad part. But you don’t want to melt the first layer of lamination with the EPP.
The winglets were laminated with three layers of see through foil and then with five layers of colored foil to make them ultra robust. The motor mount was sprayed with black plasti dip.
After installin’ all the electronics they first were covered with duct tape for doin’ again the procedure with the spray glue on both sides.
After 24 hours of dryin’ you are set for the big lamination round. First layer of see trough foil on top and bottom done on this picture. You may ask what components I used for this wing? It is a eagle tree OSD, two GPS modules (one for the tracker and another one for fail safe), FrSky receiver with a dipol and a standard antenna, IMRC video transmitter with a handmade SPW… and a lot of voltage regulators and filters.
Now next layer of black lamination and the orange one for the rudders. This beast can’t break! In total I spent around 15 hours for the entire lamination process.
Most important thing is to have a perfect center of gravity. If the wing is 2 tail heavy it will never fly. I used metal plates on the bottom to get a perfect COG and including battery total weight is now at 1.8 kilogram.
And this is how it looks after 80 hours of work between May 2014 and February 2015… this flying wing is ready for take off! Here is the post to the maiden flight.
