The L-4A, originally designated the O-59, was the military version of the famous Piper J3 Cub. The U.S. Army Air Forces ordered the first O-59s in 1941 for tests in conjunction with its growing interest in the use of light aircraft for liaison and,

The Piper L-4 Grasshopper is a military version of the famous 1930’s Piper Cub. The aircraft has a simple, lightweight design which gives it good low-speed handling properties and short-field performance. The Grasshopper/Cub is one of the best known light aircraft of all time.

Nicknamed “Grasshopper”, the Piper L-4 was engaged in all theaters of operations of the US Army during the Second World War. On June 6, 1944, it was engaged to correct the shots of the Allied Navy. Throughout the battle of Normandy, it continued to inform Allied gunners while participating in the transport of authorities.

It featured a fully-enclosed engine cowl, wheel pants, brakes, a fully-castoring tailwheel, and a slightly increased wingspan. The Piper J-5 Cruiser next entered service as the L-4F (75-hp J-5A) and the L-4G (100-hp J-5C), and the US Navy bought 100 modified J-5Cs and called them HE-1s.

A Piper L-4 light aircraft takes off from the deck of the aircraft carrier USS Ranger to provide artillery spotting information and intelligence during Operation Torch, the Allied invasion of North Africa in November 1942.

2020年6月20日 · 型号：Piper L-4. 类型：双座轻型观通联络机. 动力：一台65马力Continental O-170-3水平对置四缸发动机。 性能：最大平飞时速137公里，巡航时速121公里，实用升限2835米，航程306公里。 重量：空重331公斤，最大起飞重量553公斤。

2018年8月24日 · The Piper L-4 Grasshopper evolved from the successful Piper Cub series that took to the air as early as 1930. By 1941, the US Army was in the market for such a light observation and liaison aircraft with rugged reliability, procured four such examples and evaluated the type as the YO-59, later ordering no fewer than 40 more as the O-59.

The L-4E was based on the Piper J-4E Cub Coupe, which was slightly larger than the J-3; similarly, the L-4F and L-4G were based on the Piper J-5 Cruiser. The L-4H was similar to the -B model, powered by a 65-hp Continental horizontally-opposed flat four engine.

Piper L-4 Grasshoppers were first ordered in 1941 for use as a light liaison and observation aircraft, although they performed a wide range of duties.

Modified from the Piper J-3 Cub, the L-4 was a light observation and liaison aircraft adapted for military use during World War II. Its primary role was coordinating long-range artillery fire for Allied forces.