Hawker Siddeley Trident: A Commercial Failure Born from Conservative Specifications

The de Havilland DH.121, later renamed the Hawker Siddeley Trident, took to the air on January 9, 1962, beating Boeing's 727 by just under two years.

Although it arrived on the market earlier, the Trident ultimately lost out to Boeing with a production total of only 117 aircraft compared to the 727's 1,832 deliveries.

The commercial failure of the Trident was largely due to a single mandate from British European Airways (BEA), which instructed de Havilland to shrink the original DH.121 airframe from 111 seats to 97 and reduce its range from 2,070 mi to 930 mi.