THE PLT OF A CESSNA 150, N3382V, NOTED THAT THE WIND WAS CALM, SO HE ELECTED TO ENTER TRAFFIC FOR RWY 8 TO PRACTICE LANDINGS. HE SAID HE USED THE UNICOM FREQ TO ANNOUNCE ENTERING TRAFFIC FROM A 45 DEG ENTRY AS WELL AS ADVISING OF HIS POSITION IN THE PATTERN. HE MADE A TOUCH-&-GO LANDING & REMAINED IN THE PATTERN. AT ABOUT THAT SAME TIME, THE PLT OF A PIPER PA-24, N7187P, WAS ON ARRIVAL & MADE A STRAIGHT-IN APCH TO RWY 26. HE REPORTED THAT HIS ACFT HAD INTERMITTENT RADIO PROBLEMS. HE TRIED TO CONTACT THE UNICOM OPERATOR & WHEN HE GOT NO RESPONSE, CONTINUED THE APCH. THE ACFT LANDED ON OPPOSITE ENDS OF THE RWY AT ABOUT THE SAME TIME. THE PA-24 PLT SAW THE CESSNA & BEGAN A GO-AROUND. HE LIFTED OFF & TURNED RIGHT, BUT WAS UNABLE TO REMAIN AIRBORNE. THE ACFT SETTLED IN GRASS & WAS HEADED TOWARD WORKERS ON THE GROUND, SO THE PLT TURNED BACK TOWARD THE RWY. SUBSEQUENTLY, THE ACFT COLLIDED ON THE RWY. THE CESSNA PLT WAS IN THE PROCESS OF RAISING HIS FLAPS WHEN IMPACT OCCURRED & DID NOT SEE THE OTHER ACFT. AIM RCMDS DOWNWIND TRAFFIC ENTRY.