Rotation and keyframes I am working on a gun turret for a spaceship. The turret has three parts. It resembles a Gatling gun type. I have animated the barrels to start turning very rapidly to simulate rapid anti-aircraft fire. The first keyframe is set to o degrees in the rotation, I then move the keyframes 3 seconds further and then enter 5000 in the rotation. The animation starts exactly as I want but about half way, the rotation slows down and then accelerates again. It does the same thing when rendered. What causes this slowdown? Could it be the processing power of my laptop or is there a better method to use? Thank you.
I think the accepted answer works but could be better. What you are seeing is an optical illusion. The barrels in the middle of the animation are lining up with the previous frame, so they appear to not be moving.

Enabling motion blur should let you see the motion throughout the animation, but still allow you to use smooth interpolation (so the spin up and slow down would be smooth).