In this case, landing is achieved on skids or similar simple devices.
Mostly used on helicopters, although there have been fixed wing examples which include the Messerschmitt Me163, the Messerschmitt Me321 and the U-2 reconnaissance aircraft
where the wingtip support wheels ("Pogos") fall away after take-off and drop to earth, the aircraft then relies on titanium skids on the wingtips for landing.