Narrative:

Aircraft cleared for visual approach runway 18R mco, cleared to land. At approximately 1300 ft MSL (1200 ft AGL) traffic in position cleared for takeoff. At 1200 ft MSL, air carrier Y md-80 was cleared to position and hold. I asked tower, 'is this going to work?' and received no reply. At 1000 ft MSL air carrier Y is cleared for takeoff. Preceding aircraft is not yet airborne. Air carrier Y starts takeoff roll as preceding aircraft lifts off. First officer (PF) and I discuss possibility of a go around. Go around is not preferable due to thunderstorms east, south, and west of airport. Air carrier Y is evidently heavy, it is hot (92 degrees F). Air carrier Y uses a lot of runway and is not airborne as we cross runway threshold. I call go around and first officer performs go around. When I report go around to tower they seem somewhat surprised, issues us a turn to 140 degree and we are vectored back for another visual approach and land uneventfully on runway 18R. We had all aircraft involved in visual contact at all times. Runway 18L is closed at mco for construction and controllers seem to have a problem there with only 2 runways. Controllers may need training or reminding of how long it takes aircraft to get airborne under hot/heavy conditions. Controllers seem to take this in stride but passenger and pilots don't. This is a less than safe situation.

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Original NASA ASRS Text

Title: ACR X HAD LTSS FROM ACR Y ON TKOF ROLL. SYS ERROR.

Narrative: ACFT CLRED FOR VISUAL APCH RWY 18R MCO, CLRED TO LAND. AT APPROX 1300 FT MSL (1200 FT AGL) TFC IN POS CLRED FOR TKOF. AT 1200 FT MSL, ACR Y MD-80 WAS CLRED TO POS AND HOLD. I ASKED TWR, 'IS THIS GOING TO WORK?' AND RECEIVED NO REPLY. AT 1000 FT MSL ACR Y IS CLRED FOR TKOF. PRECEDING ACFT IS NOT YET AIRBORNE. ACR Y STARTS TKOF ROLL AS PRECEDING ACFT LIFTS OFF. FO (PF) AND I DISCUSS POSSIBILITY OF A GAR. GAR IS NOT PREFERABLE DUE TO TSTMS E, S, AND W OF ARPT. ACR Y IS EVIDENTLY HVY, IT IS HOT (92 DEGS F). ACR Y USES A LOT OF RWY AND IS NOT AIRBORNE AS WE CROSS RWY THRESHOLD. I CALL GAR AND FO PERFORMS GAR. WHEN I RPT GAR TO TWR THEY SEEM SOMEWHAT SURPRISED, ISSUES US A TURN TO 140 DEG AND WE ARE VECTORED BACK FOR ANOTHER VISUAL APCH AND LAND UNEVENTFULLY ON RWY 18R. WE HAD ALL ACFT INVOLVED IN VISUAL CONTACT AT ALL TIMES. RWY 18L IS CLOSED AT MCO FOR CONSTRUCTION AND CTLRS SEEM TO HAVE A PROB THERE WITH ONLY 2 RWYS. CTLRS MAY NEED TRAINING OR REMINDING OF HOW LONG IT TAKES ACFT TO GET AIRBORNE UNDER HOT/HVY CONDITIONS. CTLRS SEEM TO TAKE THIS IN STRIDE BUT PAX AND PLTS DON'T. THIS IS A LESS THAN SAFE SIT.

Data retrieved from NASA's ASRS site as of July 2007 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.