Dec
25
25
500mm Foam Polyhedral Bi Plane
2150kv, biplane, christmas, esc, foam, scratch build, servo, xmas Comments Off on 500mm Foam Polyhedral Bi Plane
My 500 mm Foam Bi Plane Christmas day 2012 Le Bons bay New Zealand
Took the camera off after this flight as its 19 Grams to much for the tiny bi-plane.
Scratch built for Xmas day. It was fun little plane for the day. It was a bit windy for it so without ailerons a few crashes, nothing that couldn't be taped up however until the ESC caught fire :)
Span 550mm with flip ups
Airframe weight 74 Grams Extruded Polystyrene and Bamboo
Batts 52 Grams 180mAh Nano Tech's
Motor and prop 52 Grams
RX 10 Grams
ESC 9 Grams eith wires and connector Hobbyking SS Series 8-10A
2 X 6 Gram servos
AUW 209 Grams
Wing loading around 11 Oz/ft² assuming you count both wings as wing area for a bi-plane. Some say the effective wing area is 75% of the total giving around 15 Oz/ft²
Wing loading around 11 Oz/ft² assuming you count both wings as wing area for a bi-plane. Some say the effective wing area is 75% of the total giving around 15 Oz/ft²
Rudder and elevator (no ailerons which was s shame)
Lots of lift from chunky wings, its over powered with a 44 gram AXN-2208-2150 2150kv you could induce a roll with the throttle. The polyhedral flip ups were not big enough I suspect, and it was windy but is flew Ok, the beach is a good place to crash, landed in a tree at one point the big motor kicked her free however.
Getting some Hextronic 24 Gram 1500kv for these smaller models as recommended by
Foam and Tape along with the HobbyKing 12A BlueSeries.
Getting into flextures, not enough flextures ind RC models in my opinion. They work well and don't backdrive the servos like metal wire, fine on these tiny planes.
Note the bamboo push rods, which weigh nothing.
Cooked the ESC by the end of the session as the two 180mAh Nano Tech's ran dry I taped on a 1300mAh, to heavy to many amps.
Might build a little plane like this for indoors with a tiny motor like a C10 2900kv which is around 8 Grams .
Indoor foamy spec
Yank and bank bi-plane 50 Watts should get around 150 - 200 Grams of thrust so plenty
Yank and bank bi-plane 50 Watts should get around 150 - 200 Grams of thrust so plenty
Air frame 60 grams
Battery Turnigy nano-tech 460mah 2S 25~40C Lipo Pack 33 Grams
ESC wires ect Hobbyking SS Series 8-10A ESC 9 Grams
Hobby King 2.4Ghz Receiver 6Ch V2 13 Grams
AUW 134 Grams
