Accession Number : ADA033726


Title :   Evaluation of CONAP Concept for Advanced ABM Nosetips


Descriptive Note : Final rept. 29 May 1974-30 Jun 1976


Corporate Author : MARTIN MARIETTA AEROSPACE ORLANDO FL


Personal Author(s) : Ossin, Archie ; Kendall, Paul


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a033726.pdf


Report Date : Nov 1976


Pagination or Media Count : 99


Abstract : This document reports the results of a 25-month research study, entitled 'Evaluation of CONAP concept for Advanced ABM Nosetips.' This program evaluated the performance of the Controlled Atmosphere Protection (CONAP) concept in active oxidation protection of a hot refractory metal, transpiration cooled nose tip for future application in an Advanced Interceptor Missile system. The specific objectives of this program were to build, process, test, and evaluate three-dimensional porous tungsten, sphere-cone nosetips at the Wright-Patterson 50 MW Plasma Arc Facility. In addition, the program evaluated distributed discrete hole models in the Martin Marietta Ramburner Facility. The porous tungsten nosetips, tested in the 50 MW Plasma Arc Facility were processed porous tungsten made from Sylvania Tungsten-Copper (80 v/o W - 20 v/o Cu), manufactured to SPRINT Specification 11181124. This material selection was based on the results of previous work accomplished under AMMRC Contract DAAG46-73-C-0053 where several porous tungsten materials were characterized for flow properties and internal heat transfer characteristics. The results of these tests showed that the CONAP Concept was viable; however, further development at the porous tungsten material will be required for use in a flight environment. A significant result of the evaluation of the discrete hole concepts was that a departure from the ordinary sphere-cone configuration was advantageous in terms of requiring a minimum flow for survival.


Descriptors :   *TUNGSTEN , *TRANSPIRATION , *POROUS METALS , *NOSE TIPS , *AMMONIA , *COOLANTS , *COOLING , INTERCEPTORS , CONICAL BODIES , TEST FACILITIES , SURFACE TO AIR MISSILES , CONFIGURATIONS , SPHERES , COPPER ALLOYS , ANTIMISSILE DEFENSE SYSTEMS , SYSTEMS ENGINEERING , REENTRY VEHICLES , PERMEABILITY


Subject Categories : Metallurgy and Metallography
      Surface-launched Guided Missiles
      Guided Missile Reentry Vehicles


Distribution Statement : APPROVED FOR PUBLIC RELEASE