Fly Electric!

Bubbles Key Statistics

Wing span: 54"
Wing area: 611 sq"
Wing loading: 15 oz/sq'
Weight: 61oz
Motor: Astro 15 Cobalt #615
Gearbox: Astro standard 2.38 : 1
Prop: Master Airscrew 11x7 Electric
Prop speed: 7000 RPM
Batteries: 12 x RC2000
Motor current (full power): 24.5A
Motor power: 300w
Power loading: 77 w/lb (input)
Flight times: Almost always 9 minutes
7 minutes during display flights
Up to 20 minutes gentle cruising or thermalling
5~6 minutes with camera or floats (curtailed to have power for landing)
Receiver: Dalasy 6ch single conversion
Servos: 4 x JR 331
Speed control: Jeti JES40
Rx battery: 350mah 4 cell nicad
Aircraft design: Own design
Airfoil: Own design similar to Middle Stick; almost symetrical
Wing construction: One piece; laminated spruce/balsa spars (each 1/8 x 1/4"); Depron foam ribs (3mm); balsa compression spars; built-up ailerons
Fusalage construction: Traditional open structure with built up 2mm liteply top longerons and 6x6mm balsa diagonals elsewhere
Undercarriage: Fixed; 1/8" piano wire and 2" homemade wheels; steerable tail wheel
Covering: Solarfilm
Extra features: Mounting points for float flying and internal position for camera
What would I do differently?: It would have been simpler to use 3/32 (2.5mm) balsa for the ribs (I used Depron which needs cap strips or compression spars to prevent chord-wise compression by the covering). Make sure the flight pack cannot move.

Top of page
Click on the links above for more info.
Click on the links below for other pages.

Home Art of the Possible Absence of Matter Links Updates Email
SITE MAP