There is no evidence that live warheads were used, as many of the wrecks examined by Eglin archeologists have concrete ballast filling the warhead compartment.

Intended only for freight service, these units had a long metal head end; the extra space aft of the radiators had concrete ballast.

Balkan also removed the Tu-154's concrete ballast trim on which conservative Tupolev engineers had insisted.

Production Tornado F.2s had concrete ballast in place of the Foxhunter radar, due to the problems.

A caisson is sunk by self-weight, concrete or water ballast placed on top, or by hydraulic jacks.

When filming a jump, anywhere from 500 to 1,000 pounds of sand bags or concrete ballast was placed in the trunk to prevent the car from nosing over.

During fitting-out the yacht had significant extra weight added including concrete ballast and even a large traditional capstan so the Queen could be entertained by watching the sailors work.

The passenger cars carried concrete ballast in a depressed center section to minimize the possibility of wind tipping a lightly loaded car off the rails.

In the Sept. 27 crash, 16,000 pounds of concrete ballast shifted forward as the train sped around a curve, pinning and fatally injuring Mr. DeBourgh.

The impact shifted 16,000 pounds of concrete ballast forward, pinning and fatally injuring Mr. DeBourgh.