Accession Number : AD0776779

Title :   An Investigation of Techniques for Launching Large Balloon Systems from Aircraft or Rockets in Flight.

Descriptive Note : Instrumentation papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Carten,Andrew S. , Jr

Report Date : 09 OCT 1973

Pagination or Media Count : 90

Abstract : The requirements for placing a military payload (communications relay, electro-optical sensor, etc.) in the sky at short notice are identified. A demonstration aircraft-launched balloon system is proposed and the basic assumptions defined. The balloon size and mass of inflatant to be carried aloft are calculated. Compressed gas and cryogenic storage systems are compared. The weight of storage tank/lift ratio is used to demonstrate the superiority of cryogenic storage. The properties of liquid helium and liquid hydrogen are discussed with respect to safe long term storage. The heat needed to vaporize the cryogens and to warm the resultant inflation gases is calculated. Methods of generating and transferring the required heat at the time of inflation are described. (Modified author abstract)

Descriptors :   *Balloons, *Air launched, *Cryogenic storage devices, Tanks(Containers), Payload, Deployment, Heat exchangers, Aerial delivery

Subject Categories : Lighter-than-air Aircraft
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE