Piper-PA22-Tri-pacer.

The Pacer was originally designed as a tailwheel aircraft and thus had somewhat limited forward visibility on the ground and more demanding ground-handling characteristics. To help introduce more pilots to easier, safer flying, in 1953 the PA-20 was redesigned and offered as the PA-22 Tri-Pacer with a nosewheel in place of the tailwheel landing gear. Additionally, the Tri-Pacer offered higher-powered engine options in the form of 150 HP (112 kW) and 160 HP (120 kW) engines, whereas the largest engine available to the original Pacer had an output of 135 HP (100 kW).