If you wanna know what an autogyro is, and why it's only kinda an autogyro, look at the description for the original one.
Anyways, some practical info:
How to use:
1. Set the throttle to 100%.
2. Wait for about 20 seconds and let it to its thing.
3. Now you can begin to carefully pitch it upwards if you want to ascend quicker, in any case it's ready for your use now.

Max weight: around 1400 pounds, though it can just barely fly at that point. However, you probably won't ever need to carry 1400 pounds of weapons or other things, so it's plenty.
It isn't really that fast, but what do you expect from a helicopter fused with a plane, really?

Enjoy, and have a good day.
-MrCringe