JS31 LOST DIRECTIONAL CTL ON TKOF AND HIT A RWY LIGHT.

Narrative

DEPARTING RWY 30 AT IAD AT APPROX 90 KTS (PRIOR TO V1); THE ACFT VEERED HARD TO THE R. DIRECTIONAL CTL WAS LOST AND THE ACFT STRUCK A RWY LIGHT. ALTHOUGH THE WIND WAS OUT OF THE L AT 10 KTS GUSTING TO 18 KTS; I DO NOT BELIEVE THIS WAS THE PROB. THE ACFT WAS EXTREMELY DIFFICULT TO CTL AND I BELIEVE THE L ENG SURGED; CAUSING THE INSTABILITY SINCE WE WERE MAINTAINING CTRLINE PRIOR TO THE OCCURRENCE. I FEEL NOTHING COULD HAVE BEEN DONE; EXCEPT STEERING ON THE 31 CHKED MORE FREQUENTLY. SUPPLEMENTAL INFO FROM ACN 472987: DEPARTING OFF OF RWY 30 AT DULLES. I WAS THE PNF. WE BROUGHT THE ACFT UP TO PROPER TORQUE BEFORE RELEASING THE BRAKES. BEFORE REACHING ROTATION SPD THE ACFT PULLED DRASTICALLY TO THE R SIDE OF THE RWY; STRIKING A RWY LIGHT. THE CAPT WAS BRINGING THE ACFT INTO REVERSE THRUST TO STOP THE ACFT WHILE I WAS PUSHING ON THE YOKE TO GIVE HIM MORE DOWNWARD FORCE ON THE CTL SURFACES TO HELP IN STEERING. WE THEN PULLED OFF OF THE RWY AT TXWY Q4 TO DISCUSS WHAT WE THOUGHT WAS THE PROB AND TALKING TO GND; TWR; COMPANY AND PAX. AFTER DOING AN ENG RUNUP; WE DECIDED THAT THE BEST THING TO DO WOULD BE TO DEPLANE THE PAX AT THE TERMINAL; WHICH WE DID. AFTER POSTFLT WALKAROUND; WE SAW WE HAD A PROP STRIKE OFF A TAXI LIGHT.