The PKZ is a heaver-than-air observation vehicle, meant for high altitude recon above enemy territory. It has a decent endurance, and can move decently fast. It is meant to be used with the gyro, and if you don't use it you will most certainly crash.
Startup procedure -
Toggle 'Gyro'
Toggle 'Starter'
Throttle (usually all the way)
W/S - Pitch
A/D - Roll
Up/Down - Collective
This vehicle does not have any yaw controls but is stable
The PKZ is based off a real prototype helicopter (PKZ-2) from Austria-Hungary during WWI. I tried decently to recreate something similar in Stormworks. Enjoy!