Retrorocket Soft Landing of Airdropped Cargo

reportActive / Technical Report | Accession Number: ADA085220 | Open PDF

Abstract:

A retrorocket soft landing system for airdropped cargo is described and mathematically analyzed. Solid propellant rockets and fixed height ground sensing, previously used in the experimental Parachute Retrorocket Airdrop System PRADS, are assumed for this system. Seventeen variables affecting the load impact velocity are defined and used to write the one-body equations of motion for the system. A computer is used to generate 500 constrained random values for each independent variable, to calculate the impact velocity for 500 cases by solving the equations of motion, and to statistically analyze the results. It is concluded that 95 of the soft landings can be expected to have impact velocities between 2.0 and 3.4 ms 6.1 and 10.3 fts.

Author(s):
Nykvist, William E.
Author Organization(s):
ARMY NATICK RESEARCH AND DEVELOPMENT CENTER MA
Descriptive Note:
Technical rept. Oct 1978-Oct 1979
Pagination:
0070

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NATICK/TR-80/011
Task Number(s):
AD
Project Number(s):
1L162210D283
Monitor Series:
ANL
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_4.6_Engineering; JCA_5.3_Planning; JCA_4.6.1_General Engineering; JCA_4.1_Deployment and Distribution; JCA_4_Logistics; JCA_1.2.6_Concepts; JCA_1.3.2_Personnel Management; JCA_1.2.3_Educating
Modernization Areas:
Fully Networked C3
Communities of Interest:
Weapons Technologies
Descriptor(s):
*RETRO ROCKETS, *SOFT LANDINGS, AERIAL DELIVERY, AIR DROP OPERATIONS, CARGO, CARGO PARACHUTES, DECELERATION, EQUATIONS OF MOTION, HEIGHT FINDING, LANDING IMPACT, PARACHUTE DESCENTS, PROXIMITY FUZES, SOLID PROPELLANT ROCKET ENGINES, SUSTAINER ENGINES, VELOCITY
Field(s)/Group(s):
Gliders and Parachutes, Logistics, Military Facilities and Supplies, Rockets
Keyword(s):
PRADS(PARACHUTE RETROROCKET AIRDROP SYSTEM), AS283, PE62210A, WUAD051
Report Date:
1979 Dec 01