Notwithstanding these achievements, the Yak-40 found little acceptance in western markets due to its technological shortcomings-obsolete and inefficient engines, primitive avionics and a cruising speed below that of many contemporary turboprops.
Notwithstanding these achievements, the Yak-40 found little acceptance in western markets--mostly, probably, due to the political climate of the period. Some contribution to the result could also be assigned to minor technological shortcomings-relatively simple avionics and a cruising speed below that of many contemporary turboprops.