Thursday, April 15, 2010

GRUMMAN AMERICAN TRAINER


1967–79



STANDARD DATA: (Trainer) Seats 2. Gross wt. 1,560. Empty wt. 975. Fuel capacity 24. Engine 108-hp Lycoming.
PERFORMANCE: Top mph 138. Cruise mph 124. Stall mph 60. Initial climb rate 705. Range 435. Ceiling 12,750. Takeoff distance (50') 1,590. Landing distance (50') 1,100.

STANDARD DATA: (Yankee) Seats 2. Gross wt. 1,500. Empty wt. 963. Fuel capacity 24. Engine 108-hp Lycoming.
PERFORMANCE: Top mph 144. Cruise mph 134. Stall mph 66. Initial climb rate 710. Ceiling 11,000. Range 515. Takeoff distance (50') 1,615. Landing distance (50') 1,245.

The American AA-I Yankee and its improved version, the AA-IA Trainer, started out as the James Bede-designed BD-I. After acquiring the design from Bede in 1964, American Aviation did some extensive redesign work and put the two-place Yankee into production in 1967. Conceived as a low-cost sport or utility aircraft, the Yankee incorporated several new construction techniques, including the use of aluminum honeycomb panels as the primary structural members and metal-to-metal bonding instead of rivets or bolts. The wing spar is a heavy aluminum tube that also houses the fuel supply. The wing ribs are bonded to the spar. Large bonded-on skin panels virtually eliminate all seams, and there are no protruding rivet heads to create drag.

The AA-IA Trainer was introduced in 1971 and soon replaced the Yankee. It incorporated a modified wing with improved low-speed characteristics, some changes in optional equipment, and a propeller with improved cruising performance. Grumman American Aircraft Corp. ultimately took over the production of the Trainer and added more versions based on the basic airframe design.




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