Loss of control during landing, Blackshape Prime BS100, PH-4Q1, Middenmeer airfield
The MLA version of the Blackshape Prime is approved in the Netherlands with a maximum take-off weight of 472.5 kg. According to the flight manual, the stall speed at this weight, with the wings horizontal and 30 degrees of flaps, is 35 knots. In practice however it has shown to be almost impossible, even with just one occupant, to remain below this maximum take-off weight, which leads to an increased stall speed. Just like many other Dutch users of the Blackshape Prime BS100, the pilot therefore structurally maintained higher approach and landing speeds than those specified in the flight manual. His intention to bring the aircraft to a standstill before the exit from the runway may have contributed to the fact that he allowed the approach speed to fall below the higher stall speed than that specified in the flight manual. In the Netherlands, it is expected that the maximum take-off weight of MLAs will be raised during the first half of 2022 to 600 kg, and the maximum stall speed increased to 45 knots, such that this discrepancy between manual and practice no longer exists.
More about this incident can be found in the Quarterly Aviation Report Q3 2021
