SMA HAS WAKE TURB ENCOUNTER WITH JET ACFT.

Narrative

ROUGHLY 10-12 YRS AGO I WAS TRANSITING THE DFW TERMINAL AREA ON AN IFR FLT TO SAT IN A MOONEY 201. AS I RECALL I WAS AT 6000-8000 FT. NUMEROUS ACFT; MANY OF THEM HVY; WERE CLBING TO ALT AND I WAS BEING ROUTED UNDER SOME OF THEM; BUT MORE OR LESS AT R ANGLES TO THEIR DEP PATHS. I DID NOT TO MY KNOWLEDGE PASS IN ANY IMMEDIATE PROX TO ANY OF THE DEPARTING OR CLBING ACFT. IN CLR AIR WE EXPERIENCED A TREMENDOUS BUT EXTREMELY BRIEF BUMP ACCOMPANIED BY A LOUD NOISE; ALMOST AS IF THE ACFT HAD BEEN HIT BY THE PROVERBIAL '2 BY 4.' THE FLT PROCEEDED WITHOUT INCIDENT. THERE WAS NO VISIBLE DAMAGE TO THE ACFT OR CHANGE IN FLT CHARACTERISTICS. IN RETROSPECT; I HAVE TO WONDER IF WE DID NOT CROSS AN AREA OF WAKE TURB AT EITHER THE TOP OR THE BOTTOM OF THE VORTEX. IF THE FORWARD SPD OF A MOONEY AT ROUGHLY 150 KTS WERE ADDED TO THE OPPOSING VELOCITY AT EITHER THE TOP OR THE BOTTOM OF THE VORTEX AS IT PENETRATED AT A 90 DEG ANGLE; I CAN IMAGINE THAT THE INSTANTANEOUS RESULTING AIRSPD MIGHT BE EXTREMELY HIGH. SUBSEQUENTLY; I HAVE TRIED TO MAKE SURE THAT I DON'T GET VECTORED DIRECTLY UNDER ACFT UNLESS SEPARATED BY SEVERAL THOUSAND FT; AND HAVE NOT EXPERIENCED THIS PHENOMENON AGAIN.