This is a basic idea to give you the distance from touching down and if you dipping a wing.
http://www.backupsensorshop.com/Car_Backup_SD2.asp This is a basic backup alarm with the ability to measure distance. On your final leg you would turn it on and get a visual distance and audible tone all the way to landing. This would be simply to do, just hook the wire that goes to reverse wire to a power switch and turn it on. Since we flare to land (depending if your a taildragger) you can mount the sensors at a countered flare angle or put them on a ball mount so they always hang down regardless of the plans angle. I think this would be helpful for the landing gear slammers and the occasional miss judge landings. If the sensors are wing mounted then you can see if you dipping a wing upon landing. I hope this is helpful for us new guys. Thanks, David Boyer