Narrative:

After pushback we ran the after start checklist and the first officer pulled out the flip cards and read the speeds from the card and I repeated the speeds at the appropriate time during the checklist. We were cleared for takeoff and I began the takeoff roll. During the beginning of the takeoff roll I moved the yoke forward and aft and it felt a little light; however we had flown the aircraft several times that day and I didn't give it much thought. At V1 the first officer called V1 then rotate and I began the rotation process; by pulling back on the yoke. I pulled the yoke full aft and was not getting any rotation. With my initial light feel of the yoke early in the takeoff roll and then no rotation; I immediately called for an abort and began the abort at approximately 120 KTS. The runway is over 13;000 ft long and at the time of the abort we were approximately 4;000 ft down the runway. At no time was the safety of the passengers; crew or the aircraft jeopardized during the abort. We returned to the gate and I turned the aircraft over to maintenance with the event written into the aircraft maintenance log. We were tail swapped and we began the preparation for departure. While loading all passengers and bags; the first officer and I ran our checklists. Once we completed our checklists; we pushed back off the gate. After starting the engine; we ran the after start checklist. It was at this time that I realized that we had had bugged the wrong speeds for the previous takeoff. Our takeoff weight for both flights was 47;000; on the first takeoff we had bugged the speeds for 37;000. This is the reason why; when I attempted to rotate; I was not getting any rotation and we aborted. Have both the captain and first officer verify the aircraft weight with the flip card.

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Original NASA ASRS Text

Title: EMB145 flight crew reports inadvertently setting airspeed bugs for a 37;000 LBS aircraft; when in fact the aircraft weighs 47;000 LBS. At the rotate call the aircraft will not rotate and the Captain rejects the takeoff.

Narrative: After pushback we ran the after start checklist and the First Officer pulled out the flip cards and read the speeds from the card and I repeated the speeds at the appropriate time during the checklist. We were cleared for takeoff and I began the takeoff roll. During the beginning of the takeoff roll I moved the yoke forward and aft and it felt a little light; however we had flown the aircraft several times that day and I didn't give it much thought. At V1 the First Officer called V1 then rotate and I began the rotation process; by pulling back on the yoke. I pulled the yoke full aft and was not getting any rotation. With my initial light feel of the yoke early in the takeoff roll and then no rotation; I immediately called for an abort and began the abort at approximately 120 KTS. The runway is over 13;000 FT long and at the time of the abort we were approximately 4;000 FT down the runway. At no time was the safety of the passengers; crew or the aircraft jeopardized during the abort. We returned to the gate and I turned the aircraft over to Maintenance with the event written into the aircraft maintenance log. We were tail swapped and we began the preparation for departure. While loading all passengers and bags; the First Officer and I ran our checklists. Once we completed our checklists; we pushed back off the gate. After starting the engine; we ran the after start checklist. It was at this time that I realized that we had had bugged the wrong speeds for the previous takeoff. Our takeoff weight for both flights was 47;000; on the first takeoff we had bugged the speeds for 37;000. This is the reason why; when I attempted to rotate; I was not getting any rotation and we aborted. Have both the Captain and First Officer verify the aircraft weight with the flip card.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.