Piper T-1050 project,
Take a Chieftain, stretch it 11ft 6in, strap on two turbines and there you go.
4200kg MTOW, 1400kg payload (freighter allowed an additional 300-400kg), 15 seats. 3% increased field performance from the T-1040 (a turbine Chieftain), 400nm range with full load.
All this for $300,000 USD around 1983.
Unfortunately Piper never got the orders to start production and certification. A small number of T-1040s were built. Piper intended that the 1050 modification could be applied to the 1040 once the certification process had completed.
Last edited by 43Inches; 19th Dec 2012 at 00:50.