DNRA Questions and Answers.pdf
PDF 67 KB Posted
- Attached to
- HyTEC- NASA Research Announcement (NRA) Federal contract opportunity
- Solicitation number
- 80GRC021N0001
About this file
This document contains questions and answers from a draft NASA Research Announcement solicitation. The solicitation is for the HyTEC program seeking to advance aircraft engine core power density through innovations in materials, cooling, combustion and other technologies. Offerors are advised that the first key program parameter only accounts for improvements attributed to the core technology, and cannot take double credit if another system also benefits from the same technology. Additionally, the agency does not foresee delays to first-stage milestones despite current HyTEC funding projections, and typical mechanical checkouts after system assembly are expected to last one to two weeks unless balancing issues arise.
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| (HyTEC NRA Appendix A) Questions and Answers.pdf | ||
| (HyTEC NRA Appendix A) NRA.pdf | ||
| (HyTEC NRA Appendix A) SF33.pdf | ||
| (HyTEC NRA Appendix A) Attachment A - Model Contract.pdf | ||
| (HyTEC NRA Appendix A) Attachment B -HyTEC Cost Proposal Template.xlsx | XLSX spreadsheet | |
| NRA Questions and Answers.pdf | ||
| (Amendment 1) NRA- HyTEC.pdf | ||
| (Amendment 1) Facility Rates.pdf | ||
| (Amendment 1) Attachment A - Model Contract.pdf | ||
| NASA GRC NRA- HyTEC Phase 1.pdf | ||
| HyTEC Model Contract Attachment A.pdf | ||
| Facility Rates.pdf | ||
| Attachment A - Model Contract.pdf | ||
| Attachment B - HyTEC Cost Proposal Template.xlsx | XLSX spreadsheet |
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Questions and Answers from the Draft NRA
Q: Given the latest HyTEC funding profile it is not clear how this can be achieved for many technologies. Will this milestone be delayed?
A: No, We do not envision this milestone being delayed.
Q: What duration should we assume for mechanical checkout periods in relevant NASA facilities?
A: If this is typical mechanical checkouts that are done after the test article is built up where the facility would step through the speed range and confirming vibrations, temps, and pressures are considered acceptable, that is typically a 1-2 week effort if field balancing efforts are minimal. If balancing issues arise then that will add a significant amount of time.
Q: Does the KPP-1 include the aircraft level benefit of the power extraction? For example, does the fuel burn improvement for a tail cone propulsor driven with power from the main engines get counted as part of the high power density core?
A: This KPP only accounts for the what is attributed by the core and not by another system (i.e. Power Extraction). It is up to the Offeror to do the accounting and not take double credit for the same technology.
Q: BPR is an indirect measure. Recommend FPR defined as not-to-exceed (e.g. <1.40) for vision cycle. When combined with thrust this will result in realistic limit for low spool sizing.
A: For consistency of the trends in propulsive efficiency, BPR is chosen. It is recognized that the technology needed to make improvements is FPR.
Q: How should one direct additional (more sensitive) facility questions?
A: Please use Q/A period for the final NRA
Q: Very high levels of power extraction are likely to require low spool power extraction. It is not clear how this would be tested in a core ground demonstrator. Does this KPP imply that a modified engine test must be part of the test plan?
A: Right now the power extraction work is part of an awarded contract under Phase 1. How hybridization would be a part of the core ground demonstration in Phase 2 would be up to the company.
Q: A % core reduction is likely more appropriate. The absolute core size will depend substantially on the aircraft, mission and durability goals selected. Given the expectations for these parameters for a 2035 large single-aisle product it is possible that a highly successful HyTEC program may result in a very advanced core that may still be larger than 3.5 core size.
A: HyTEC is focusing on investing in aggressive and impactful small core technologies. The success criteria was developed from all of the RFI input which was consistent with these metrics. We do recognize the minimum success criteria is aggressive.
[End of Q/A]
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