Having recently landed a Pilatus B4 'wheels up, on a wet grass runway
(without any physical damage to the a/c!). I noted the extremely short
ground run!
Could this be a useful option- if you have selected a slightly small
field for an out-landing (ie- leave the u/c up?)
Another scenario, perhaps if you find the glider rolling along at high
speed towards an obstacle, then retract the u/c! Expensive, but maybe less
painful?