File:Grumman A-6A Simulator Bombardier Navigator (B N)s Martin Baker Mk GRU-5 ejection seat (6091775248).jpg
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Summary
[edit]DescriptionGrumman A-6A Simulator Bombardier Navigator (B N)s Martin Baker Mk GRU-5 ejection seat (6091775248).jpg |
The black cylinder wrapped in red stickers is the Drogue Gun, which is triggered by trip-rod connecting the seat and the airplane. As the seat rises, the natural metal rod is withdrawn from a yellow housing. The drogue gun fires a weight which drags a small parachute out of the package at the top of the seat's headrest. (Basically, under the green cover under the black cloth wrapping around various bits of webbing and line here.) The weight, drogue, etc, go right through any turbulence around the seat and out into what racing car drivers call "clean air". Opening there, the drogue stabilizes the seat so its falling with seat pan and occupants' feet first.. In some cases, a second, larger, drogue is pulled out by the first. In either case, the end of the final drogue's shroud lines is at a fitting which is held by the scissors shackle. The scissors shackle is the curved metal business bolted to the seat above the green housing (and on the other side of the cylindrical catapult at the far right edge). After a fixed delay, or after falling below the barometric threshold, an actuator releases the seat harness, leg restraints, face curtain (if used) and any other connection between the occupant and the seat. Then the scissors shackle operates, releasing the drogue(s) to pull the occupant free of the seat and pull out the main parachute. The anodized green housing is the top latch mechanism. On the other side, a similar housing contains, the Bombardier / Navigator (B/N)'s seat's specific pyro delay. Since the A-6 is a two seat aircraft, either pilot or B/N initiation ejection causes both to eject, unless some positive step is taken to limit the ejection to only of seat. So either seat will usually start both, but each as a different delay, in a different color of anodized housing, so that the go in the right sequence (not both at the same time...) EA-6B Prowlers had 4 seats, 4 different delays, 4 different colors of housing. Three features identify this as a GRU-5 seat: The shoulder harness is attached to the head-box; the face-curtain strap is routed around the head box. This GRU-5 has no rocket motor under the seat, thus, no initiator for the rocket motor. A GRU-7 would have an initiator attached to the drogue gun. DSC_0093 |
Date | |
Source |
Grumman A-6A Simulator Bombardier / Navigator (B/N)'s Martin Baker Mk GRU-5 ejection seat
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Author | Bill Abbott |
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This image, originally posted to Flickr, was reviewed on 12 February 2013 by the administrator or reviewer File Upload Bot (Magnus Manske), who confirmed that it was available on Flickr under the stated license on that date. |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:14, 12 February 2013 | 3,872 × 2,592 (3.77 MB) | File Upload Bot (Magnus Manske) (talk | contribs) | Transferred from Flickr by User:High Contrast |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D40X |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/5 |
ISO speed rating | 800 |
Date and time of data generation | 14:43, 19 August 2011 |
Lens focal length | 30 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Ver.1.00 |
File change date and time | 14:43, 19 August 2011 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 14:43, 19 August 2011 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 4.1 APEX (f/4.14) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash fired, strobe return light detected, auto mode |
DateTime subseconds | 20 |
DateTimeOriginal subseconds | 20 |
DateTimeDigitized subseconds | 20 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 45 mm |
Scene capture type | Standard |
Scene control | Low gain up |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |