:siren:[highlight][b]Click the pictures to see them full size![/b][/highlight]:siren:
Hello, yesterday I saw the infamous "Flying Fuck" toy from ThinkGeek.
[media]http://www.youtube.com/watch?v=pnjyf7IaQSE[/media]
So I thought of making my own, just to kill some time, and it could be fun!
After a while into it, it didn't even need to say "Fuck" it just needed to fly, it didn't need to be remote controlled either.
So I scavenged some fans from coolers I had around to see if it worked, I stuck them to a small motor, got 12 batteries together and connected it.
[img_thumb]http://dl.dropbox.com/u/5270753/21062010057.jpg[/img_thumb]
[img_thumb]http://dl.dropbox.com/u/5270753/21062010058.jpg[/img_thumb]
It didn't fly, oh surprise! I tried a smaller and lighter Zalman fan and it didn't fly either, I quickly realized it was the design of the fans, those are fans, they aren't designed to get lift.
I went Internet Researching, learned more about the airfoil shape and everything related to wings and helicopter balance.
I decided to build my own wings. After sanding and polishing they were my pride.
[img_thumb]http://dl.dropbox.com/u/5270753/heli/22062010059.jpg[/img_thumb]
I connected them to the motor, got some wood to make it stand upright and connected it to the batteries.
[img_thumb]http://dl.dropbox.com/u/5270753/heli/22062010060.jpg[/img_thumb]
[img_thumb]http://dl.dropbox.com/u/5270753/heli/22062010061.jpg[/img_thumb]
It vibrated a lot, it seemed to be working but it didn't fly, but it definitely got some lift.
So I really want to make this work. Even if it just gets an inch off the ground and crashes, I just want it to get liftoff. So I'm asking Facepunch, hopefully there is someone here that has nice knowledge of aerodynamics and the likes and probably studied it in college or something.
I'm thinking the wings were too small to get enough lift for it to work, my next plan, unless advised against, is to build another set of wings double the size of the ones I have, and if that doesn't work, triple of what I have; If that doesn't work I'll have to review the wing design and do some shenanigans to make it work.
My summer holidays started so I have lots of time to finish this and I have every intention of doing so.
For one thing, the speed of the motor + the weight of the propeller blades will cause the "helicopter" to spin wildy, you'll lose a lot of the power that way (because the blades aren't spinning as fast, relative to the air). That's why (most) helicopters have a tail rotor.
So, what you're saying is that all the power of the wings is being used to rotate the body instead of lifting it?
Makes sense since the tail rotor would be counter balancing the torque, preventing the body from rotating, therefor, all the main rotor's power goes to providing lift.
I also got a bigger set of wings, with a symmetrical airfoil design, just need to make them stick to the motor or they will fly off like 2 knives.
I also got a brushless motor from a CD-ROM reader, I rewired it but I need an Electronic Speed Control to send timed electrical pulses to the coil so that the motor works, and it works on AC power and has 3 terminals. The components for an ESC are hard to find around here so I think I'll need to stay with the brushed one.
-snip-
to counteract that issue with spin, toys such as the 'flying fuck' have TWO rotors that spin in opposite directions of each other.
For your ESC problem, just go to your local hobby shop and pickup the cheapest Brushless speed controller you can find.
Problem is there are no hobby shops around here that I know about.
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