Archives by Tag 'kf'
kf Delta Foamy Version 2
kf Delta Foamy Version 2, originally uploaded by mattmc. My handmade engine mount on the kf Delta Foamy version 1 wasn’t so great. A 3mm square plate of ply hot glued onto a foam “firewall”. After a lengthy flight on a 2S 1000mAH battery, the motor wouldn’t turn. After taking it apart, I found excess [...]
Foamy paint job
Foamy paint job, originally uploaded by mattmc. It might look like a 5 minute paint job but it took me at least 7.
S-l-o-w flying KF delta build – the prop maketh the plane
After the lackluster first few flights I got around to putting a 9047 GWS EP Propeller (228x119mm) and wow what a difference. Same 800maH 2S 7.4V battery and RCTimer1400kV 2204-14 motor mind you but with the larger, more efficient prop I was getting good vertical performance and could slow fly stable enough to do a [...]
S-l-o-w flying KF delta build – Maiden Flight
Time to see how this baby goes. I used hot glue all around, control horns, motor mount, bottom skin, step…. and everything has held together well. For the maiden flight I used an RCTimer1400kV 2204-14 motor, an EP 7035 propeller, a 2S 800mAH lipo battery. All up weight was 182 grams / 6.4 ounces. Performance [...]
S-l-o-w flying KF delta build – motor mount II
Some 3mm ply behind the motor, probably overkill and a bit heavy but it’s what I had at hand, some hot glue and the engine is on. I had to widen the gap for the prop by about 7mm to fit it all in. With the motor in place I could get a feel for [...]
S-l-o-w flying KF delta build – engine mount
Add a layer of thin ply to the upright foam and I have a mount. The motor mounts are 31mm apart and the area is about 40mm x 40mm excluding the tabs. Add a couple of triangle support tabs behind the mount will add support. In the background you can see the 19mm (0.75″) wedge [...]
S-l-o-w flying KF delta build
After an hour or so of cutting, the basic form is taking shape. A couple of the photos show how to get a nice clean cut 45°. measure the thickness of the foam (in this case 5mm) back from the leading edge, plus a bit to allow for the height of the metal ruler.
S-l-o-w flying KF delta build
The objective is to build a foamy that I can literally throw in the car without worrying about breaking a prop or rudder, and that can be built from el cheapo materials and spares I have lying around. For the material I’m using a combination of foam core art board and 3mm depron. I was [...]