Nomad Fleet Vamdrup

GAF Nomad N.24

A series of parachute flights had been planned from Weston-on-the-Green. The forecast conditions were good, predicting a surface wind of 360°/10 kt, visibility 30 km, with no significant weather and some strato-cumulus cloud with a base of 3,000 feet. The first flight, which consumed 144 lb of fuel, was completed successfully with 12 parachutists jumping from 12,000 feet. Thirteen parachutists boarded for the second flight and the aircraft was cleared to take off from the dry surface of grass Runway 01 (take off run available 3,194 feet). The surface wind at the time was 360°/15 kt with no significant weather and the temperature was 15°C. The pilot subsequently reported that he checked the condition levers were set to 100% N2, the flaps were set to 10° and that the trim was set in the take off range. He also reported that the company recommended power of 738°C turbine outlet temperature (TOT), and 89 pounds per square inch (psi) manifold pressure were set and achieved during the take off run. This power setting was equivalent to the 'Max Cruise Rating' as specified in the 'Operating Limits' section of the aircraft manual and no take off performance charts or data concerning 'take off distance required' (TODR) and 'accelerate stop distance required' (ASDR) information was available. The maximum take off power available (5 minute limit) was 810°C TOT and 102 psi. At approximately 80 to 83 kt (scheduled rotation speed 71 kt) the pilot pulled back on the control column. He reported that, 'the aircraft felt more nose heavy', 'the aircraft nose did not rise and he perceived that the aircraft was no longer accelerating'. He decided to abort the take off, commenced braking and set the condition levers to the full reverse position. As the aircraft decelerated he turned it to the right in order to avoid trees and bushes ahead. The aircraft struck a small earth mound, whilst still travelling at about 15-20 kt, and came to an abrupt halt. The pilot shut down both engines and selected the fuel and the battery to OFF. The crew and passengers evacuated the aircraft unaided.