Aircrews who blast around the loop have another unrepeatable name for this low flying area, but it is commonly known as the 'Mach Loop' or Machynlleth Loop. LFA7 covers a series of valleys in North Wales and is favoured by 'Loopies' who like to capture dramatic images of aircraft training for low-level roles. This fun tshirt features a map of the area on the back of the shirt Flying Graphics Mach Loop T-Shirt