NASA/George C. Marshall Space Flight Center, Procurement Office, Marshall Space Flight Center, AL 35812

A -- ADVANCED LASER IGNITION TECHNOLOGY DEMONSTRATION SOL 8-1-0-T6-C7514 DUE 060700 POC Kimberly R. Day, Contract Specialist, Phone (256) 544-8999, Fax (256) 544-2812, Email kimberly.day@msfc.nasa.gov -- George E. Pendley, Contracting Officer, Phone (256) 544-2949, Fax (256) 544-2812, Email george.pendley@msfc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.msfc.nasa.gov/cgi-bin/EPS/bizops.cgi?gr=D&pin=62#8-1-0-T6- C7514. E-MAIL: Kimberly R. Day, kimberly.day@msfc.nasa.gov. The is modification no. 4 to the Request for Quote (RFQ) entitled Advanced Laser Ignition Technology Demonstration, Solicitation No. 8-1-0-T6-C7514. The purpose of this modification is to answer questions submitted by prospective offerors. The due date for receipt of offers is extended. The due date for receipt of offers is June 5, 2000. Question 1: Item 2 of the RFQ describes a test article. Will NASA/MSFC fabricate two test articles and provide one to the contractor? Answer: No, there is only single test article available for this requested investigation because this test article will be used for other test activities at MSFC. Consequently, MSFC requires the laser ignition study to be conducted at MSFC. Question 2: A brief description of the test article is also provided in Item 2. Is it a single injection chamber or multi-injections chamber? Answer: This test article is a multi-injection chamber. The propellant will be injected on the chamber wall instead of at the face plate, which is also called avortex chamber. Question 3: What is the phase of the oxidizer -- liquid oxygen at the exit of the injector. Is it in liquid phase or gas phase? Answer: The operation chamber pressure at the mainstage will be approximately 1000 Psia. Cryogenic oxygen (temp.~ -265F) will be used for this test. It is safe to assume that as it enters to the chamber, oxidizer will be in the liquid phase prior to the iginition. Question 4: What is the flow-rate of the oxidizer? Answer: Depending on the testing conditions, mass flow rate of oxygen will vary from 2.0 to 3.2 lbm/sec at the mainstage. Question 5: What is the oxygen ratio range in the chamber? Answer: Mixture ratio will vary from 2.0 to 3.2. Question 6: What is the steady-state pressure of the chamber? Answer: Pc ~ 1000 psia. Question 7: What is the program duration? Answer: Addressed per RFQ Item 8. Question 8: What is the program budget? Answer: It is the responsibility of the contractor to submit proposed costs. Posted 06/01/00 (D-SN460475). (0153)

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