Finally I got my hands on a Skywalker. The plane came as ARF version like shown on the image below. All components are cheap Chinese no name without any markings.
The fuselage was already glued but thanks to the low quality glue they used it was easy to separate. Next I removed all the unnecessary stuff.
The wings and tail was reinforced with flat carbon spars. Bottom and top of each wing, also each fuselage half on the tail.
The paint scheme was shamelessly stolen from Derek_S Skywalker build. 😛
Another reinforcement of the upper fuselage section is done by 2mm plywood. New servos are installed and the cables routed. The GPS will go on top of the horizontal stabilizer.
New servos are also installed in the wing. Ailerons hinged and connected to the servos.
I made a new motor mount since I want to use a 10″ prop. The mount is made from 6.5mm plywood and 4 wooden dowels will distribute forces into the foam.
The removable canopy foam block was reinforced with 2mm plywood on the bottom. Cut in shape to take a Gopro and another plywood block glued in to take the FPV camera inclusive pan servo.
Another flat carbon spar was glued into the bottom of the fuselage. A short one on each side of the canopy opening.
While thinking how to fix batteries inside I came up with the idea shown on the image below. Used plywood again and made some slots on either side to use velcro straps to fix down the batteries. The white velcro will be used for the FY21-AP autopilot.
The Skywalker will be used without landing gear so a belly protection is needed. This time I tried something new instead of strapping tape. Scotch 3M Aluminum tape will protect the belly and tail skid during landings.
Details of the rudder to servo connection. Nylon hinges are used for the rudder.
The ESC found a place in the upper bay. Two holes on each side of the fuselage will allow air flow through the bay. The ESC is way overestimated with 60A, so I don’t expect this is getting hot.
All the electronic installed. On the bottom the Ruby autopilot and the yellow EzUHF receiver will stick to the side wall.
After gluing the horizontal stabilizer in place the elevator got linked to it’s servo.
The GPS found it’s position on top of the horizontal stabilizer.
Motor is fixed to the mount. A Multiplex connector is used to connect and distribute the signals to the aileron servos. The black/red wire provides power for the wing lights.
uThere Ruby autopilot installed
Ruby current sensor
Ruby airspeed and magnetic field sensor, pitot tube.
My Skywalker FPV canopy with GoPro Hero in position. The camera is fixed with two velcro straps and protected by the LayerLens from getfpv.com
Canopy bottom. A Multiplex connector is used for the pan servo and FPV camera power and video signals.
Canopy fixed on the Skywalker just with the original screw. FPV camera is a ReadyMadeRC RMRC-700XV fixed to a 180° pan servo.
Possible battery setup:
- 3S1P 3200mAh total
- 3S2P 6400mAh total
- 3S2P 4400mAh total
Half wave dipoles are used for the EzUHF antenna. They just stick in the wings foam, removable and connected using SMB connectors. The lower part is made flexible by using silicon fuel hose.
Ready for take-off. CG is 105mm behind leading edge.
The following setup will be used:
- Motor Turnigy NTM 3536-1400
- Prop APC 9×6 (10×4 possible)
- ESC Turnigy Super Brain 60A with 4A SBEC
- uThere Ruby Autopilot
- Ruby OSD
- EzUHF RX 8ch
- 4+1 Servos turnigy TY90S MG
- FPV Camera RMRC-700XV with lens 2.8, pan only
- Gopro or weight dummy
- 1.3GHz video link with SPW antenna, placed on the wing top, center line
- Some illumination for night ops
- Batteries 1x 5000mAh or 2x 3200mAh 3S2P or 2x 2200mAh 3S2P or 1x 3200mAh 3S1P (all balancing at CG 105mm)
- Take-off weight (GoPro included):
- 2x 3200mAh 3S2P = 2370g
- 2x 2200mAh 3S2P = 2150g
- 1x 3200mAh 3S1P = 2090g
- 1x 5000mAh 3S1P = 1870g
- 2x 5000mAh 3S2P = 2220g
Input power with 9×6 @ 100% throttle: 476W ( 42.5A/11.2V)
Input power with 9×6 @ 50% throttle: 104W ( 9A/11.6V)
A discussion exist on FPVLAB: http://fpvlab.com/forums/showthread.php?3663-Mictronics-Skywalker-Build-Thread
Maiden flight video:
Skywalker needs some repair…
Happened while flying inverted at low altitude and low speed. In this special case the elevator has not enough control authority to hold altitude, so nosed in.
The wing is just fine, no scratch no dents. Rest will be repaired and the plane will fly again.
Nose glued and taped.
Fuselage glued and taped.
Canopy awaiting repair. Stay tuned…