Blurry - dull in contrast imagery The newly-designed safety device, spreading 5,000 square feet of silken cloth, drops from the air with a 2,500-pound load, proving its feasibility as a method of bringing passenger cabins to earth. Developed by Major E. L. Hoffman, the 'chute will be made to lower a compartment with 10 persons at a safe rate of speed. One of the greatest advances in modern aviation.