# How many independent control inputs does a hexarotor have?

1. 6, because a rigid body has six degrees of freedom
2. 4, since it is similar to a quadrotor, except with more motors
3. 6, because there are six motors

I was taking an online quiz, and I thought option 3 is the correct one, only to find out I got the answer wrong. I know that I could change the answer 2 times and by chance I finally got it right, but I want to understand why option 3 is wrong?

• think about the discrete motions that the device can make – jsotola Sep 15 '18 at 14:52
• What is the correct answer? I don't get it – Aryaman Jan 8 at 21:09

The 4 independent inputs directly correspond to the transmitter stick inputs, $$u = [\delta_{thr}, \delta_{ele}, \delta_{ail}, \delta_{rud}]^T$$