Local slang? When someone says "what kind of aircraft is it?," you find this to be slang? English translation: specifically what kind of aircraft is it that you're flying? Not really that hard to grasp, you see. You could have said Cessna 152, Weedhopper, Quicksilver MX, F18 Hornet. What kind means just as it sounds. What kind of aircraft. Very complicated, that.
I said nothing about what you should or should not be doing. I asked you what aircraft you're flying. You didn't say. I asked you again.
If stating what aircraft you're flying is some kind of secret, fine. It's a simple question; one your'e apparently unwilling or unable to answer, for whatever reason.
You did post a web site for a seller of ultralights, which advertises a number of different kinds of ultralights.
If it's a deep, dark, secret-squirrel classified ultralight project, then so be it. It's a simple question. Forget I asked. I really wasn't that interested.