Vendor Questions 7-31-23.doc
DOC document 67 KB Posted
- Attached to
- S-76D Flight Simulator Visual System
- Solicitation number
- 692M15-RFI-07112023
About this file
This document contains questions from vendors and answers from the Federal Aviation Administration regarding solicitation number 692M15-RFI-07112023 for an S-76D flight simulator visual system. The FAA provided photos and data files of the S-76D cockpit dimensions in response to a vendor's question. The approximate weight of the simulator system is 1500 pounds. The FAA confirmed a contrast ratio specification of 100:1 for the visual system exceeds industry standards, as it seeks to provide high image quality for search and rescue and low-level flight operations.
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Other files
| File | Type | Posted |
|---|---|---|
| MicrosoftTeams-image.png | PNG image | |
| MicrosoftTeams-image (1).png | PNG image | |
| MicrosoftTeams-image (3).png | PNG image | |
| MicrosoftTeams-image (2).png | PNG image | |
| S76_3View2 (1).pdf | ||
| SOW S76 Visual System 06-29-23 final.docx | DOCX document |
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Vendor Questions
Notice ID: 692M15-RFI-07112023/S-76D Flight Simulator Visual System
1. Question: Would it be possible to get a drawing or dimensions of the S-76D cockpit that will be used for this simulator?
Answer: The FAA is able to provide the attached photos and data files.
2. Question: What is the weight of the simulator?
Answer: Approximately 1500 pounds.
3. Question: Is the contrast ratio of 100:1 correct as it is high per industry standard. Was this supposed to be 10:1?
Answer: The FAA certification guidance for contrast ratio is 5:1 for adjacent squares projected onto a surface, and is 25:1 for points projected onto a surface. (Reference 14 CFR Ch. I (1–1–14 Edition)). However, this contrast specification includes older technologies such as CRT projectors, that could produce only the lower contrast ratios.
As part of this SOW, we researched the effects of contrast ratio on image quality and determined that higher contrast ratios improve the quality of moving scenes and provide additional definition in stationary scenes. Clearly, higher contrast ratios provide better image quality but in the literature the general consensus is ‘more is better’. The one standard [that I could find] that defines thresholds for contrast levels was developed for the movie industry and is called Projected Image System Contrast Ratio (PISCR). The PIESCR provides 4 levels of contrast ratio depending on the type of video. For full motion, PISCR recommends a minimum contrast ratio of adjacent squares (light/dark) of 80:1. It should be noted that they have plans to introduce another level of 250:1. We adopted the specification of 100:1 to slightly exceed the PISCR standard.
We chose the higher contrast ratio standard due to the types of missions we plan to fly in the S76 – close in search and rescue and low level operations such as Oil Rig landings, possibly using night vision. Flying search patterns close to the ground involves a lot of motion in the visual scene so the higher contrast would be of benefit.
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