Introduced into service in 1942, the Vought F4U-1 featured inverted gull wings  and a massive 2,000hp engine spinning the largest propeller mounted on a fighter at the time. While the fighter&39;s performance and toughness was quite impressive, deficiencies such as inadequate forward visibility, restricted all-round visibility  due to the early frame-like canopy, and the tendency for the left and right wings to stall at different speeds led to various improvements being added throughout reproduction, eventually resulting in the F4U-1A version. These improvements included a longer tailwheel leg for better forward visibility, a new canopy for better all-round visibility, and an almost unnoticeable 15cm &39;stall strip&39; fixed to the leading edge of the right wing to ensure both wings would stall at the same speed.