AN SF34 ENCOUNTERED AN MD80'S WAKE TURB AFTER TKOF ON RWY 13L AT DFW. THE MD80 HAD CROSSED OVER RWY 13L FOR LNDG ON RWY 17L; GREATER THAN 3 MINS PRIOR TO THE SF34'S TKOF. THE RPTING FO STATES THAT THE WAKE OF ACFT APCHING TO LAND ON RWY 17L SETTLES AROUND THE MIDPOINT OF RWY 13L; AND COINCIDES WITH ROTATION AND INITIAL CLB OF MANY OF THE TYPES OF ACFT TAKING OFF ON RWY 13L.

Narrative

WHILE TAXIING FOR TKOF AT DFW AND AFTER XING RWY 17C FOR RWY 13L WE NOTICED AN MD80 ON FINAL APCH FOR RWY 17L. WE WERE CLRED TO POS AND HOLD FOR RWY 13L. NO NOTICE WAS GIVEN OF THE PRECEDING ACFT'S LNDG. THIS WAS THE FIRST FLT OF THE DAY; SO A MAX PWR TKOF AT 100 PERCENT TORQUE WAS BEING PERFORMED. AFTER CLRNC WE INITIATED A NORMAL TKOF ROLL. AFTER ROTATION AT APPROX 200 FT AGL; THE ACFT EXPERIENCED A SEVERE JOLT AS WE PASSED THROUGH THE OTHER ACFT'S WAKE. GREATER THAN 3 MINS HAD PASSED BTWN OUR ACFT AND THE LNDG ACFT'S APCH. AN ENG FAILURE AT V1 OR AFTER; IN THIS SIT COULD HAVE RESULTED IN A GREATER ROLL VARIATION THAN ENCOUNTERED ON A NORMAL TKOF. ALSO HAD THIS TKOF BEEN ACCOMPLISHED WITH MINIMUM PWR A SIMILAR ROLL UPSET COULD RESULT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: APPROX ONE HALF OF ALL PLTS AT THIS RPTR'S COMPANY HAVE EXPERIENCED SOME SORT OF WAKE TURB ENCOUNTER WHEN DEPARTING ON RWY 13L. WHEN THIS RPTR'S SF34 ENCOUNTERED THE WAKE IT CAUSED THE ACFT TO ROLL 10-15 DEGS BOTH L AND R; AND LOSE 10 KTS OF AIRSPD. RPTR CITES POOR RWY LAYOUT AS THE PRIMARY CAUSE OF THIS INCIDENT. THE VORTEX OF ACFT LNDG ON RWY 17L SETTLES RIGHT AT THE ROTATION POINT OF ACFT TAKING OFF ON RWY 13L.