Flew the Trident ( all models for about 18 years 10000 hours) A great pilots a/c only trouble with the Trident1c was it started of very under powered with Spey 505-510 of about 9850 lbs thrust eventually upgraded to 505-5f about 12000 lbs thrust It came down very well with reverse on the out board engines full speed brake and speed at MMO/VMO which initially was .88/385 15000fpm down could be achieved. Max range for a T1 was LHR-FCO and for a T2 TLV-LHR T3 was LHR-ATH. Great fun to fly but the bean counters hated it.