This question is addressed mostly to the screeners... Under which category are the gyrocopters should be uploaded? I've always uploaded them under "Helicopters" before (I believe I've read somewhere that that's where they belong), but just recently in the email to one of my accepted gyro photo's I found a screener's comment, "Not a helicopter"; apparently, according to that screener, they should be uploaded as single-engine props.
So, the question is - was the screener right? Where can I find information about it?