Pilot/over gross weight
A pilot I was. Overgross take off I have done. Peacetime max Gross for a C-130E is 155,000 pounds. I thought I was at max gross. The load teams had calculated the loads incorrectly, however. Lawson AAF, Ft. Benning, GA is in the bend of a river that is down about 100 feet below the field level. The runway lines up with the river to the north. We took off to the north. The runway was about 5300' long and at max gross we should have come unstuck at about 4500' roll. We didn't. We were just at unstick speed when we crossed the overrun, I horsed the beast into the air, it shuddered in a stall, I stuck the nose down into the river valley, the CP yanked the gear up, we went about 30 to 50 feet down in the river valley as the beast struggled for air speed. Finally after about a mile we had enough speed to initiate climb. We were cleared to climb to Flight Level 230 (23,000 feet). Traffic control kept asking when we were going to climb. The best we could get was about 50 feet a minute. Gradually, as fuel burned off, we climbed faster. We were headed to the Dominican Republic with steel planking for a bridge to be used in flood relief. We were past St. Augustine Florida before we passed FL180 and were well down the east coast of FL before we got to our assigned altitude. We used the performance charts to do reverse calculations to determine what our actual Gross Weight had been. Yes, it's possible for a C-130E to get airborne with the unique conditions of having a place to dive for speed past the end of the runway with a Gross Weight of 195,000.... This "war story" is to illustrate, there is a safety margin built in. Others have pointed out, when you get heavy, handling changes. A bike with 2 up, unless your GIB is rather small, is going to handle differently. Be prepared for it. Taking off that day, we knew we were heavy. We just didn't know HOW heavy. That was DUMB. We trusted the wrong people to be accurate with their weight calculations. In my years after that, such an event never happened again to me. I never was so trusting again.
JR
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