Boeing 747SP / United Military 1920-1939 With the deep stall issue

With the deep stall issue resolved

including several conversions to special-duty variants

while first deliveries were from November 1984

and 378-foot WHEC Coast Guard Cutters

On February 27

Boeing 747SP / United Military 1920-1939 With the deep stall issueBoeing 747SP United Airlines airplane model. The SP suffix in 747SP stands for Special Performance, and points to the ultra long range abilities of these 747 variants that preceded the current 747 400 by 15 years. The 747SP's range is best illustrated by the spate of long range distance records it set in the mid 1970s. The most prominent of those was the delivery flight of a South African Airways SP, which over March 23 24, 1976, flew nonstop with 50