Eye position indicator in F16?

saberrider · by **saberrider** » 10 Apr 2017, 19:08

Pilots don't fly in the same a/c , so how they align the eyes position in F16 ?

s_ellebaut · by **s_ellebaut** » 11 Apr 2017, 10:59

What do you mean with "eye position"? HMCS? HUD?

magnum4469 · by **magnum4469** » 11 Apr 2017, 22:36

I think he is referring to what some larger aircraft have call "Design eye". Usually a couple of marks somewhere in the cockpit that you line up which gives the same site picture for such things as runway alignment on final. There is no such thing in the F-16, the pilot will raise or lower the seat to individual preference, usually it is a fist on top of the helmet in between the shut canopy... Most want to sit as high as possible without hitting their cranium on the canopy...

saberrider · by **saberrider** » 12 Apr 2017, 06:31

magnum4469 wrote:I think he is referring to what some larger aircraft have call "Design eye". Usually a couple of marks somewhere in the cockpit that you line up which gives the same site picture for such things as runway alignment on final. There is no such thing in the F-16, the pilot will raise or lower the seat to individual preference, usually it is a fist on top of the helmet in between the shut canopy... Most want to sit as high as possible without hitting their cranium on the canopy...

Then one must crunch to see HUD symbology.There are no reference marker's? Only comfortable space above to not banging the head ?

saberrider · by **saberrider** » 12 Apr 2017, 06:33

s_ellebaut wrote:What do you mean with "eye position"? HMCS? HUD?

To center the HUD.

dragracingmaniac · by **dragracingmaniac** » 12 Apr 2017, 06:38

Seat height adjustment switch on right side of cockpit.

saberrider · by **saberrider** » 12 Apr 2017, 06:40

Thanks

guy@rdaf.dk · by **guy@rdaf.dk** » 12 Apr 2017, 15:05

There is actually a switch on the HUD control panel that will enable the Correction Coefficients Alignment Stroke Pattern in the HUD. The pilot then needs to adjust the seat up or down until the triangle in the bottom and top of the HUD are in the correct position.

From the -34:

Seat Adjustment for Design Eye. HUD symbology coincides with the real-world scene at the design eye position. To
find the design eye, a test pattern is available via the TEST switch on the HUD remote control panel (Figure 2-53). The seat
should be adjusted so that each test pattern bar can be clearly seen.

Seat Adjustment for Design Eye Procedures.
1. HUD remote control panel TEST switch - ON.
2. Boresight pattern - Select.
Depress the TEST switch once (boresight pattern appears on the HUD).
3. Seat - Position.
Position the seat up or down as required to position the triangle at the top and bottom of the HUD.

Most pilots I know never use this feature. You see it once during conversion and then you just note the distance between the top of your helmet and the canopy. For most pilots its a clenched fist...