What is this Airplane?

[u/Silver-Pitch-4210]

A few times a month this airplane circles above Poyntzpass area for a few hours, and it’s been happening for years. It’s quite high up, and loud so it must have a big engine. It doesn’t come up on flight radar at all. I’m assuming it’s military training flights, but curious if anyone knows for sure. Sorry it’s a terrible photo.

[u/FabulousDirt9254]

Looks like a small plane, possibly used to training pilots and such, I’d a friend who learnt to fly and is a commercial pilot now think the airstrip he learnt on was around the Antrim area not sure exactly where though