Accession Number:

AD0768673

Title:

LDF Powered Balloon Program

Descriptive Note:

Instrumentation papers

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA

Report Date:

1973-07-18

Pagination or Media Count:

46.0

Abstract:

The report describes POBAL, a test flight to demonstrate the feasibility of accomplishing station-keeping by powering a 711,000-cu. ft. free balloon against the wind in the minimum wind field near 60,000-ft altitude. The propulsion system, fabricated from off the shelf components, incorporated a 35- ft diameter helicopter rotor and an 8-hp electric motor powered by Ag-Zn batteries. Line of thrust was controlled by a 9-ft high rudder, steerable either by radio command or by autopilot. POBAL was flown from Holloman AFB, New Mexico in September 1972. System components, flight results, recommendations and feasibility studies for a long duration POBAL system are discussed.

Subject Categories:

  • Lighter-than-air Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE