AN A36 PLT EXPERIENCED A PROP STRIKE AND MINOR ACFT DAMAGE WHEN THE ACFT SETTLED TO THE RWY BECAUSE THE PLT'S SEAT SLID FULL AFT ON A TOUCH-AND-GO MANEUVER.

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HAVING LANDED AFTER A REPOSITIONING FLT OF MY ACFT FROM MHT TO BED AT NIGHT; I DECIDED TO COMPLETE A FEW TOUCH-AND-GOES AND A FEW STOP-AND-GOES TO FACILITATE MEETING THE OBLIGATIONS OF NIGHT CURRENCY. ON MY THIRD TOUCH-AND-GO; I APPLIED PWR FOR TKOF; LIFTED OFF THE GND; ESTABLISHED A POSITIVE CLB RATE; BEGAN GEAR EXTRACTION; AND WAS APPLYING R RUDDER TO OVERCOME THE ENGS 'P' FACTOR; WHEN THE SEAT SLIPPED BACK IN THE TRACKS. WHAT FOLLOWED IS NOT TOTALLY CLR BUT AS BEST AS I CAN RECONSTRUCT EVENTS; I INITIALLY PULLED BACK ON THE YOKE AND IMMEDIATELY OVERCOMPENSATED BY PUSHING THE YOKE FORWARD. THE ACFT PITCHED FORWARD AND I PULLED BACK ON THE YOKE. I HEARD A LIGHT TWANG JUST AT THE POINT WHERE I WAS TRANSITIONING TO A NOSE-UP ATTITUDE. AT THIS POINT; I WAS COMMITTED TO THE TKOF AND CLBED OUT AND WENT AROUND ONCE IN THE PATTERN; LANDED; TAXI TO MY HANGAR AND SHUT DOWN. WHEN I EXAMINED THE PROP; I OBSERVED THAT ABOUT 2 INCHES OF THE 3-BLADED PROP TIPS WERE BENT BACK ABOUT 90 DEGS. THE NEXT DAY; WHEN MY MECH EXAMINED THE DAMAGE; HE OBSERVED THAT PART OF THE PLT SIDE INBOARD GEAR DOOR WAS SCRAPED. THERE WAS NO OTHER DAMAGE TO THE FUSELAGE. DURING THE GAR; I DID NOT OBSERVE ANY UNUSUAL VIBRATIONS OR MALFUNCTIONS AND THE ENG RAN SMOOTHLY. 4 DAYS EARLIER; I'D TAKEN THE ACFT TO THE SHOP TO HAVE THE MECH CHK OUT SOME MINOR SQUAWKS INCLUDING THE SEAT NOT LATCHING IN THE REARWARD POS. HE FIXED THE OTHER SQUAWKS AND HE INFORMED ME THAT THE SEAT TRACK HOLES AT THE REAR OF THE TRACK HAD BEEN FILLED AS THE RESULT OF AN AIRWORTHINESS DIRECTIVE; BUT THERE WAS A FIX AVAILABLE; THAT WOULD ALLOW THE SEAT TO BE LATCHED IN THE REARWARD LOCATION. I REQUESTED THAT HE PURCHASE THE HARDWARE TO INSTALL IT WHEN IT WAS AVAILABLE. I AM A SHADE OVER 6 FT TALL WITH VERY LONG LEGS AND THE EXISTING TRACK'S MOST REARWARD POS HAS ME UNCOMFORTABLY CLOSE TO THE YOKE. MOREOVER; I OBVIOUSLY HAD NOT PAID ENOUGH ATTN TO MAKING CERTAIN THE SEAT WAS PROPERLY LATCHED. I WILL IN THE FUTURE TAKE MEASURES TO MAKE ABSOLUTELY CERTAIN THE SEAT IS LATCHED AND WILL; IN ADDITION; HAVE THE REARWARD LATCHING FIX; DESCRIBED BY MY MECH; INSTALLED.