The sizes and diameters are wide ranging. But 12 to 18 gauge are average diameters. The length is aircraft specific with varying sizes from a few inches to over 12 inches.
Modified B-29 aircraft.
unleaded
which type of motor used in remote control airplane
protective covering (a lead apron)
jet and/or rocket propelled aircraft{jet/rocket}.
Type 52 stealth bomber
Some popular types of needles used in crafts include tapestry needles, embroidery needles, sewing needles, and knitting needles.
A340
The most commonly used type of Boeing aircraft is the Boeing-747 passenger jet. This airplane is used internationally to carry people all over the world.
aluminum
The different types of felting needles used in needle felting are single, double, and triple needles. Each type has a different number of barbs, which help tangle and mat the fibers together during the felting process.
Many different engines are used in aircraft, including fighter bombers. You would need to name a specific aircraft to get the answer.