What happened
On 4 July 2009, a Rotorsport UK MTOSport, registration G-DWDW, was attempting to depart from a private field located at Holyrood, near Prestwich, Lancashire. The aircraft was carrying one pilot, one passenger, and 40 kg of fuel. Based on the weight of the occupants and fuel, the aircraft was likely below its maximum takeoff weight of 500 kg.
Initially, the pilot assessed the wind at 120° and 7 knots, leading to a decision to take off in an easterly direction. However, during the takeoff roll, the pilot noted that the wind direction had shifted, resulting in a downwind takeoff. Following an extended takeoff run, the pilot determined that the aircraft lacked sufficient climb performance to clear trees situated at the eastern boundary of the field. To avoid these obstacles, the pilot initiated a left turn; however, this maneuver caused the aircraft to descend.
Faced with the presence of electrical cables to the south of the field that restricted a right-hand turn, the pilot opted to abort the takeoff and execute a right turn through 180°. During this maneuver, the Rotorsport UK MTOSport landed heavily and rolled onto its side. The aircraft sustained damage to its rotor blades, propeller, and tail fin. Both the pilot and passenger exited the aircraft without injury, and the pilot subsequently righted the aircraft to prevent any potential fuel spillage.
The investigation
The investigation was based on the aircraft accident report form provided by the pilot. Investigators examined the flight conditions, including the wind changes experienced during the takeoff roll, and the physical constraints of the airfield, such as the proximity of trees and overhead power lines.