SMALL ACFT WAKE TURB ENCOUNTER.

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WE TOOK OFF AS THE THIRD AIRPLANE IN A FLT OF 3. THE FIRST AIRPLANE WAS LOADED TO ABOUT 2500 LBS. THE SECOND AIRPLANE WAS NEAR GROSS WT OF 3350 LBS; MY AIRPLANE WAS THIRD; WEIGHING ABOUT 2700 LBS. TKOF WAS NORMAL; BREAKING GND IN ABOUT 1000 FT. WE BEGAN TO CLB AT BTWN 85-90 MPH AND REACHED AN ALT OF ABOUT 65 FT WHEN THE R WING DROPPED VIOLENTLY AND THE NOSE DROPPED MAKING THE AIRPLANE TURN 90 DEGS TO THE R. I USED FULL L RUDDER AND AILERON AND UP ELEVATOR TO COUNTERACT THE FORCES ON THE ACFT. WE LANDED ABOUT 200 FT FROM THE RWY SHEARING BOTH LNDG GEAR. WAKE TURB CAUSED THIS TO HAPPEN. I HAVE ALWAYS BEEN TAUGHT TO ONLY ASSOCIATE WAKE TURB WITH LARGE ACFT (IE; 727-757) BUT THE DANGER IS VERY REAL WHEN FOLLOWING HEAVILY LOADED SINGLE ENG ACFT. I THINK GA PLTS NEED TO KNOW THAT WAKE TURB CAN BE PRESENT NO MATTER WHAT SIZE ACFT THEY ARE FOLLOWING. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THAT HE HAD NO IDEA THAT 2 SMALL ACFT COULD PRODUCE SUCH AN AMOUNT OF WAKE TURB. HE FURTHER STATES THAT HE WILL NEVER ATTEMPT A TKOF AS A FLT AGAIN. RPTR ALSO PARTICIPATED IN THE ASRS CALLBACK QUESTIONNAIRE PROGRAM. HE HOPES THAT INFO WILL BE USEFUL TO OTHER PLTS.