2 SMA'S HAD AN NMAC IN AN UNCTLED ARPT TFC PATTERN.

Narrative

ON MAY/SUN/93 AT APPROX PM30 HRS LCL TIME; I WAS FLYING AN SMA 1 FROM GROTON; CT; TO BLOCK ISLAND; RI. IT WAS DAY VFR AND THE VISIBILITY WAS UNLIMITED. AS I APCHED THE ISLAND FROM THE NW AT AN ALT OF 1000 FT MSL; I CROSSED THE CTRLINE OF THE DEP END OF RWY 28; WHICH WAS THE ACTIVE RWY AT THE TIME; AT APPROX 2 1/2 MI FROM THE ARPT AND ANNOUNCED MYSELF ON UNICOM AS APCHING THE W END OF THE ISLAND FOR AN EXTENDED L DOWNWIND ENTRY TO RWY 28. I HAD HEARD 1 AIRPLANE ANNOUNCE HIS DEP ON RWY 28 AND HAD THAT AIRPLANE IN SIGHT AS HE STARTED HIS CLBOUT. AS I CROSSED INSIDE THE WESTERN SHORELINE OF THE ISLAND I HAD A NEAR MISS WITH AN SMA 2 WHICH I HAD NOT PREVIOUSLY SEEN. THE AIRPLANE PASSED OFF MY L WITHIN APPROX 200 FT AT APPROX THE SAME ALT. THE PLT OF THIS ACFT THEN CALLED ON UNICOM FREQ AND SAID THAT I HAD CUT HIM OFF. I ASKED WHAT HE WAS DOING THERE; AS IT APPEARED HE HAD BEEN UPWIND IN THE DOWNWIND LEG FOR RWY 28. HE REPLIED HE HAD BEEN TAKING OFF. I HAD NO FURTHER CONVERSATION WITH THIS PLT. AS I HAD NOT SEEN THE SMA 2 PRIOR TO THE NEAR MISS I CAN ONLY SPECULATE THAT HE HAD MADE A L TURN AFTER TKOF; THEN A R TURN WBOUND; OR THAT HIS AIRPLANE HAD BEEN BLOWN OFF CTRLINE OF THE DEP COURSE OF RWY 28 AS THE WIND WAS OUT OF THE NW.