A CL65 PLT; AFTER EXPERIENCING A HIGH SPD REJECTED TKOF DUE TO A HYD LINE FAILURE; SUGGESTS THAT THE USUAL TRAINING SCENARIO FOR THIS TYPE OF FAILURE MAY BE FLAWED DUE TO SIMULATOR LIMITS.

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DURING TKOF ROLL IN VMC; JUST AFTER THE 100 KT VERBAL CALL (AND PRIOR TO V1); THE ACFT EXPERIENCED A SLIGHT 'PULL' TO THE R. IT FELT EXACTLY LIKE A MINOR BRAKE APPLICATION. THE ACFT SLIGHTLY DECELERATED THEN INCREASED MOMENTUM. THE CAPT CALLED 'ABORT' AND PERFORMED A FLAWLESS REJECTED TKOF RESULTING IN NO DAMAGE; HOT BRAKES; NOR PAX EVAC. LATER EXAMINATION BY MAINT UNCOVERED A R MAIN HYD LINE WHICH SEPARATED CAUSING THE R MAIN INBOARD TIRE TO 'LOCK'. OCCURRING AT HIGH SPD; THE TIRE FAILURE GAVE A VERY INSIDIOUS LACK OF A HARD PULL; NOISE OR AIRFRAME VIBRATION. HAPPENING AT HIGH SPD; THE CAPT RIGHTFULLY MADE AN ACTUAL 'SPLIT SECOND' DECISION WITH MINIMAL INPUT; SIMULATOR TRAINING FOR EVERY ACFT I'VE FLOWN SIMULATES HIGH SPD TIRE FAILURE BY A HARD PULL; LOUD NOISE; ENG FAILURE; AND MEDIUM TO SEVERE AIRFRAME VIBRATION. THIS IS UNDERSTANDABLE DUE TO SIMULATOR LIMITS AND CHKRIDE REQUIREMENTS. AFTER THIS OCCURRENCE; I WONDER IF OPERATORS SHOULD BE INFORMED THAT HIGH SPD BRAKE 'LOCK-UP' (DEPENDING ON ACFT TYPE) COULD RESULT IN AIRFRAME INDICATIONS NOT RELATED TO SIMULATOR TRAINING SCENARIOS? CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE CAUSE OF THE LINE FAILURE WAS NOT KNOWN. IT WAS POINTED OUT TO THE CREW THAT IF THE LINE FAILS TO EITHER BRAKE; THAT ASSOCIATED BRAKE WILL LOCK MUCH AS THE AIR BRAKE ON THE TRAILER FOR A SEMI TRUCK WILL DO IF IT LOSES AIR PRESSURE. IN THIS CASE THE WHEEL DID LOCK. THE TIRE WENT FLAT ON THE BOTTOM; EVENTUALLY LOSING ITS INFLATION. THE REMAINING TIRE ON THE TRUCK REMAINED INFLATED AND USABLE.