Author: George Francis PezdirtzPublisher:
ISBN:
Category : Polyimidazopyrrolone
Languages : en
Pages : 28
Book Description
An Exploratory Study of a New Class of Stepladder and Ladder Polymers - Polyimidazopyrrolones
Author: George Francis PezdirtzPublisher:
ISBN:
Category : Polyimidazopyrrolone
Languages : en
Pages : 28
Book Description
An Exploratory Study of a New Class of Stepladder and Ladder Polymers - Polyimidazopyrrolones
Author: George Francis PezdirtzPublisher:
ISBN:
Category : Polyimidazopyrrolone
Languages : en
Pages : 0
Book Description
NASA Technical Note
Author: Flight- and Ground-test Evaluation of Pyrrone Foams
Author: Allen G. McLainPublisher:
ISBN:
Category : Ablative materials
Languages : en
Pages : 44
Book Description
Two Pyrrone materials, pure Pyrrone foam with a density of 481 kg/cu m and hollow glass microsphere-Pyrrone composite with a density of 962 kg/cu m, were tested in the Langley 20-inch hypersonic arc heated tunnel at pressure levels from 0.06 to 0.27 atm and heating rates from 1.14 to 11.4 MW/sq m. The 481-kg/cu m Pyrrone foam was also flight tested as an experiment aboard a Pacemaker test vehicle. The results of the ground tests indicated that the thermal effectiveness of the 481-kg/cu m Pyrrone foam was superior to the 962-kg/cu m glass sphere-Pyrrone composite. The 481-kg/cu m Pyrrone foam had approximately one-half the thermal effectiveness of low density phenolic nylon. The 481-kg/cu m Pyrrone foam experienced random mechanical char removal over the entire range of test conditions. Char thermal property inputs for an ablation computer program were developed from the ground test data of the 481-kg/cu m Pyrrone foam. The computer program using these developed char thermal properties, as well as the measured uncharred material properties, adequately predicted the in-depth temperature histories measured during the Pacemaker flight.
Government-wide Index to Federal Research & Development Reports
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1576
Book Description
Products List Circular [opportunities for Small Businesses]
![Products List Circular [opportunities for Small Businesses] PDF](https://books.google.com/books/content/images/frontcover/EAi4AAAAIAAJ?fife=w80-h100)
Author: United States. Small Business AdministrationPublisher:
ISBN:
Category :
Languages : en
Pages : 422
Book Description
Monthly Catalog of United States Government Publications
Author: United States. Superintendent of DocumentsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 758
Book Description
Products List Circular
Author: NASA Scientific and Technical Reports
Author: United States. National Aeronautics and Space Administration Scientific and Technical Information DivisionPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 2300
Book Description
A Selected Listing of NASA Scientific and Technical Reports for 1966
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information DivisionPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 2084
Book Description