The BN3 Trislander has some incorporated safety features that some may not be aware of ...
Operator Kondair, on a night flight between STN and AMS, the single pilot fell asleep and it was only as the fixed undercarriage hit the North Sea he managed to retrieve the aircraft, minus some of it's landing tackle, and subsequently carry out an emergency landing at Schiphol.
Now has the BN3 Trislander had retractable wheels then aircraft, and perhaps pilot, would have been lost.