Narrative:

Our preflight tpr (turbine pressure ratio) was for 34 degrees C; and a tow (take-off weight) of 183.2. That yielded a flaps 10; bleeds-off takeoff. The load closeout showed a tow of 179.5; and the temperature had cooled to 33 degrees. We submitted an ACARS request for T/O (take-off) data; using the 33 degrees; and allowed the tow to default to the closeout tow. While we were waiting for the T/O data; we briefed the load closeout; and noticed that ACARS had not loaded; or updated; the ZFW to the revision 1 ZFW. We discussed this; and could not come up with a reason for the discrepancy; but decided to type in the ZFW (zero fuel weight) weight manually on the takeoff page; which was 138.0. When we completed that task; the T/O data appeared on ACARS; but again; for an unknown reason; it showed a bleeds-off takeoff; but with an assumed temperature. I decided to submit another T/O data request; but this time I'd force the max/no derate power. Unfortunately; from the previous anomaly; I had 138.0 in my mind; so I typed that in for the tow. We got data for a bleeds-on; flaps 5 takeoff. We both assumed that was because we forced the max/no derate power. On takeoff; the airplane felt mushy; because; of course; I had entered the ZFW instead of the tow for T/O data.with the extremely bumpy runway; we didn't know we'd hit the tailskid on takeoff. In fact; it didn't occur to us to check it; until we had a chance to discuss/debrief the takeoff later in the flight. [Upon] arrival; I checked the skid; and did see that paint had been scuffed off. At that point; I suspected I knew what error I'd made; and retrieved the T/O data from the received messages page in ACARS. Sure enough; I discovered I'd entered the ZFW instead of tow.when I received the T/O data that we used; I briefed the flap setting; bleed configuration; and the temperature; but I failed to mention the tow. In order to preclude this from ever happening again; I will always brief those three items; and the takeoff weight; and runway condition. That would have trapped the error. In hindsight; with my experience; I also should also have noticed that a V1 of 135 [knots] was far too low for that weight.

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Original NASA ASRS Text

Title: Air carrier Captain reported entering values into the thrust computer that resulted in a tail strike during takeoff.

Narrative: Our preflight TPR (Turbine Pressure Ratio) was for 34 degrees C; and a TOW (Take-off Weight) of 183.2. That yielded a Flaps 10; bleeds-off takeoff. The load closeout showed a TOW of 179.5; and the temperature had cooled to 33 degrees. We submitted an ACARS request for T/O (Take-off) data; using the 33 degrees; and allowed the TOW to default to the closeout TOW. While we were waiting for the T/O data; we briefed the load closeout; and noticed that ACARS had not loaded; or updated; the ZFW to the Revision 1 ZFW. We discussed this; and could not come up with a reason for the discrepancy; but decided to type in the ZFW (Zero Fuel weight) weight manually on the Takeoff page; which was 138.0. When we completed that task; the T/O data appeared on ACARS; but again; for an unknown reason; it showed a bleeds-off takeoff; but with an assumed temperature. I decided to submit another T/O data request; but this time I'd force the Max/No derate power. Unfortunately; from the previous anomaly; I had 138.0 in my mind; so I typed that in for the TOW. We got data for a bleeds-on; Flaps 5 takeoff. We both assumed that was because we forced the Max/No derate power. On takeoff; the airplane felt mushy; because; of course; I had entered the ZFW instead of the TOW for T/O data.With the extremely bumpy runway; we didn't know we'd hit the tailskid on takeoff. In fact; it didn't occur to us to check it; until we had a chance to discuss/debrief the takeoff later in the flight. [Upon] arrival; I checked the skid; and did see that paint had been scuffed off. At that point; I suspected I knew what error I'd made; and retrieved the T/O data from the Received Messages page in ACARS. Sure enough; I discovered I'd entered the ZFW instead of TOW.When I received the T/O data that we used; I briefed the Flap setting; bleed configuration; and the temperature; but I failed to mention the TOW. In order to preclude this from ever happening again; I will always brief those three items; AND the takeoff weight; and runway condition. That would have trapped the error. In hindsight; with my experience; I also should also have noticed that a V1 of 135 [knots] was far too low for that weight.

Data retrieved from NASA's ASRS site 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.