I'm planning a new project. I'm planning to make a 4 motor, 2 axis copter(like the silverlit x-ufo).

I've ordered in one motor, esc and connectors, just to see if i can get enough throttle.

Theoratically, I should get a total of 14 kg throttle(3.3kgx4motors). I've come up with a couple of problems of which I have to solve. Havent got any parts yet.

Using a gyro with a numeric integrator i would, i think, get a drift, because the sample-period would be to long. but I don't know for sure.

It will be a fairly large program, so I guess the sample time would be even greater than e forsee.

Most of the problems are already solved, but the tilt-measuring is still a problem.

Anyone have a suggestion of what to do ?

If there is a different hardware for tilt measurement, I am all ears.

If not, how do i get a gyro to measure the correct angle over a longer periode of time. with no drift.

numeric integrator:

angle = angle + W*sampletime; //W = angle-velocity.

values in the integrator will be scaled, so that 0 degrees = 0, and a positive angle gives positive W, and negative angles give a negative W. so that 0 degrees ---> angle = 0.

Thanks for all help. Daniel.