Zerobricks

Now THAT would be genereous from Lego. Maybe i wont have to buy a 9398 after all!

The finals are now opened. funny thing is my model had the most votes, over 300, but wasnt selected... I guess the tracks proved to be too advanced.

Sorry, but ROFL. You do know toilet sprays water droplets as far as a meter away? Your models must be gross

Guide rails?

No credit for your idea or anything... I also found he used some of my ideas for his and also no credit.. Edit i see double the current, not voltage..

Been there, done that, but with a bag like the example posted:

8043 wins is asthetics, functionality, RC factor, usefull parts and fun. Simply 8043 EPIC WIN compared to other 2. P.S. without PF 8043 is still better, with more gears.

So here's the coaxial version test. It floats on arround 15 volts, but any more power to the motors and theit internal thermal fuses kick in and the whol things stops. I have no idea, why this thing is just so unstable, but those few seconds of floating prove the concept for me. I think this technology will be usefull in hovercraft design.

Thats normal, sorry.

So they made hub attachments stronger, but the hub itself is more wobbly than the old one... Too bad...

If one can lift itself, i dont see how 2 cant?

Wow! You will need a ton of bricks for sure.

I tried 2 4-bladed rotors from a single motor, but the problem comes when trying to reverse one rotor. It requires a combination like 3x8 tooth gears, which is very inefficient. This is why i rather chose 2x Rc motors. Also one motor/rotor allows me compensate for different drag ratios. I am gonna try the double motor-rotor design at school tommorow where there's an adjustable voltage supply.

I tried it with a built tail rotor, powered by same motor as the one for lift and it does fly, but it extremely unstable, swaying to the side and crashing.

If i remove arm the single motor will spin out of control :)

The first time i ran them in video the betteries were not full, you can see that when I try to switch off and they work against each other the rotor still spins slowly, menaing one battery box is not as full as another. After few seconds the motor slows down a bit, due to thermal protection, but even when wired directly to batteries there seems to be no damage, but some heat. I think that running RC motors like they were meant in the car, reversing power when full, ETC is harder for them than running constantly as here.

Nicely spotted Effe! Looks like a redesign of current one but with more holes. And love the rubber bumps on tracks, its just the thing I had an aidea in the 9398 challenge.

I just tried 2 motors with some wires. The thing wants to take off, but not both rotors have same drag, so it tends to rotate in one direction, Like Loco said, i need to control each motor individually.

Just chang the upper connectors where spring is attached with defferent ones.

And another idea... Each motor powers one rotor! The main axle does not pass through both motors, but splits where motors touch in order to reverse direction of rotors. I can add 1 more blade to each rotor, but im lacking power! EDIT you think the 9V train transfromers would be usefull?

Thanks guys, you rock! The tandem doesnt yet work, because the 2 battery boxes short circuit protections kicks in, so i need to use 4, but for that i need to additional PF extension cables (8886) which i dont have ATM.

None yet. Here's my next flyable machine: All i need now is 2 more PF extension cables and more batteries to feed the 2 hougry motors.

For all the doubters.... EAT THIS!!!!!!!!!!!!!! David, you rock man! Couldnt have done it without you! Next step is to loose the the beams holding it and add a tail rotor.

I think i already got a better idea... will keep you updated.

Suspension moves only in the under part, the uppoer tracks part is always tendioned.