The Bell 47 is a single rotor, single engine, multipurpose light helicopter manufactured by Bell Helicopter and introduced in 1946, upon which it was then introduced to the military where it served in a variety of roles and functions for 30 years. Designed by Arthur M. Young and based on the Bell 30 prototype, there have been over 5,500 Bell 47’s produced between 1946 and 1974, and they are licensed in industries in Italy, Japan, and the U.K.
    In addition to the history the Bell 47 helicopter has in the military, it also holds the title as the first helicopter certified for civilian use on March 8, 1946. Though there are some variations in the design of the early models of the Bell 47, the 47G is the most common model and it easily identified by its full exposed, ‘soap bubble’ canopy, and the saddle fuel tanks and skid landing gear.
    So if you are the proud owner or certified technician working on a Bell 47 helicopter and are in need of the highest quality exhaust parts for your aircraft, then Knisley Welding is exactly the place to find them. In addition to the extensive list of FAA/PMA approved parts for various aircraft models, Knisley Welding also provides the following exhaust parts for the Bell 47:

1. K47-614-802-1 Left Hand Stack
2. K47-614-802-3 Right Hand Stack
3. K47-614-802-5 Stub Riser

    *all of the above exhaust parts are approved by the Aviation authority for modification, and Knisley Welding protects new and overhaul exhaust parts against workmanship defects under conditions of ordinary use, for a service period of one year with no limit to the amount of hours that the part in question has been used.