simplebloke, the spiral dive can be caused by not balancing the wings properly. add a little weight to the wing on the outside of the turn, and adjust the amount of weight so it makes *broad* turns. it could also be your connecting rods are too short. the wings need to have a "dihedral effect" to keep it from going into too tight a turn.
monkeyrahha, you can find plans at The Ornithopter Zone. go to that site and click on the "articles and plans" link.
Congratulations, an amazing achievement. I have had a go at couple of these and all I can manage is some short periods of level flight followed by an increasingly tight downward spiral dive. I will try to find the modified crank design and see how I go. By the way have you seen the biplane ffreebird design?
Nothing is modified. It has about 220 turns on two loops of 1/8" rubber. You need to use lubricant or it will break before you get that many turns. Individual models may vary in performance for many reasons including differing wood density or slight variation in the dimensions of the crank. There have been several versions of the Freebird design and this is the one that has a staggered crank for more symmetrical flapping.
simplebloke, the spiral dive can be caused by not balancing the wings properly. add a little weight to the wing on the outside of the turn, and adjust the amount of weight so it makes *broad* turns. it could also be your connecting rods are too short. the wings need to have a "dihedral effect" to keep it from going into too tight a turn.
monkeyrahha, you can find plans at The Ornithopter Zone. go to that site and click on the "articles and plans" link.
nathanchronister 9 months ago
It is four strands of 1/8 inch rubber. I don't understand the difference between crank of 220 turns or straight up.
nathanchronister 9 months ago
Thats awesome, so what mass of rubber did you use and is it a crank of 220 turns or just straight up 220 turns
MCMCAZN 9 months ago
Congratulations, an amazing achievement. I have had a go at couple of these and all I can manage is some short periods of level flight followed by an increasingly tight downward spiral dive. I will try to find the modified crank design and see how I go. By the way have you seen the biplane ffreebird design?
thesimplebloke 1 year ago
Crikey, awesome!
mrjimmyos 1 year ago
my weighs a round 18 gram how big should the wings be?
forsalololo95 1 year ago
wow
SniperRulez89 1 year ago
i saw kipkays but this one is way better. could you make a vid on how you made it. i want to make one. and home much did it cost you to make it?
monkeyrahha 2 years ago
Nothing is modified. It has about 220 turns on two loops of 1/8" rubber. You need to use lubricant or it will break before you get that many turns. Individual models may vary in performance for many reasons including differing wood density or slight variation in the dimensions of the crank. There have been several versions of the Freebird design and this is the one that has a staggered crank for more symmetrical flapping.
nathanchronister 3 years ago
is this the modified balsa freebird? what rubber did you use? how many winds? did you modify anything?
Freddythethird 3 years ago
nice one dude....
munaz 4 years ago