The basic airframe, however, proved versatile enough to produce a very capable strike fighter.
Several other versions of the basic airframe were proposed as well.
However, the basic airframe is highly adaptable and numerous variants have been developed.
The A-6's avionics and equipment have been upgraded since then, but the basic airframe is unchanged.
The aircraft went though several versions, each a modification of the same basic airframe as Marske experimented with configurations.
The basic airframe was used for the light combat aircraft F-5 Freedom Fighter family.
Yangel's design was based on combining the basic airframe from the R-5 with an engine developed from the R-11.
Despite the large number of DC-8 early models available, all used the same basic airframe, differing only in engines, weights and details.
In the instant case, it was the electronic equipment which was classified as top secret, not the basic airframe of the B-29.
The initial design of the Cessna 188 was so successful that over its 17-year production run the basic airframe remained unchanged.