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What do HDG SET KNOB - DEPRESS, CRS SET/BRIGHTNESS CONTROL KNOB - DEPRESS do?


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Posted (edited)

Thx.

(I was hoping that they might set the bugs to current heading, but afaict they appear to do nothing.)

Edited by Hippo

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Posted (edited)
1 hour ago, Hippo said:

Thx.

(I was hoping that they might set the bugs to current heading, but afaict they appear to do nothing.)

 

IIRC one changes the HSI modes (I think CRS depress), and the other does nothing.

Edit: oops, probably incorrect 🙂

 

Edited by jaylw314
  • Thanks 1
Posted

''The intensity of the EHSI symbology can be changed by depressing (hold in until “BRT” label appears in the center of the display) and then rotate the EHSI Course Set Knob located on the lower right corner of the EHSI''

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Posted
1 hour ago, bukizzzz said:

''The intensity of the EHSI symbology can be changed by depressing (hold in until “BRT” label appears in the center of the display) and then rotate the EHSI Course Set Knob located on the lower right corner of the EHSI''

Ah, that sounds more right 🙂

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  • Solution
Posted

On the EHSI both the HDG and CRS knobs can be depressed. As stated above, depressing the CRS knob is how you adjust the brightness of the EHSI. I don't think depressing the HDG knob does anything. But you can click and depress it in the cockpit too. 

@jaylw314 EHSI Mode is changed with the "M" button that is located between the CRS and HDG knobs, centered below the EHSI display.

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Posted (edited)
11 hours ago, Bunny Clark said:

On the EHSI both the HDG and CRS knobs can be depressed. As stated above, depressing the CRS knob is how you adjust the brightness of the EHSI. I don't think depressing the HDG knob does anything. But you can click and depress it in the cockpit too. 

@jaylw314 EHSI Mode is changed with the "M" button that is located between the CRS and HDG knobs, centered below the EHSI display.

HDG Depress per MLU M3 does something called INU ATTITUDE (ATT) SELECT FUNCTION but couldn't figure out what exactly it is, it's not referenced again in the handbook

If anyone knows do tell

Edited by bukizzzz
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  • 3 weeks later...
Posted

The heading selection by bumping and turning the HDG knob is for setting a manual INS aircraft heading during a gyro alignment. Basically if the INU can't work out the airplane heading automatically it's how you enter a "good enough" manual one.

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  • 3 weeks later...
Posted
On 12/4/2022 at 6:05 PM, Frederf said:

The heading selection by bumping and turning the HDG knob is for setting a manual INS aircraft heading during a gyro alignment. Basically if the INU can't work out the airplane heading automatically it's how you enter a "good enough" manual one.


Thanks for the explanation, have spent an hour looking for that answer.

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