Useful way of using an empty 2-1/4” instrument hole

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digits_
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Useful way of using an empty 2-1/4” instrument hole

Post by digits_ »

I fly a plane which has an empty unused 2-1/4” instrument hole in the panel. At some point I'm sure an instrument used to be in there, but it's not used at the moment. I could cover it up with a blank cover, but I was wondering if there are any useful things that could be done with it?

I tried looking for an ipad mount or some kind of pen holder that would fit in there, but that doesn't seem to exist.

Does anyone have any suggestions?
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by notwhoyouthinkIam »

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photofly
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by photofly »

You have a minor headache which is that anything that is designed to be fitted to an airplane needs an STC, PMA, or equivalent approval to be fitted to an airplane. So if you wanted to sell, say a pen holder to fill a 2-1/4" instrument hole, you would need to provide an authorized release certificate with it.

On the other hand a non-aeronautical part can be fitted as a "minor modification", if it meets the criteria.

Why don't you get a 2-1/4" blanking plate and drill and fit something to it yourself?
https://www.aircraftspruce.ca/catalog/inpages/mk624.php
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by 185_guy »

Cover it with a picture of your girlfriend, or better yet, a picture of someone else’s girlfriend!!!
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digits_
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by digits_ »

I like the CO detector suggestion!

Keep 'm coming!
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by Beefitarian »

Custom built cigar humidor.
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by montado »

I would definitely stick my fleshlight in there.
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by rookiepilot »

Covid detector.
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digits_
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by digits_ »

montado wrote: Tue Jul 27, 2021 7:13 pm I would definitely stick my fleshlight in there.
I need a bigger hole than that for mine ;-)
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by sunk »

I filled the empty holes with a CO2 detector, vertical compass and and an outside air temperature gauge.
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by notwhoyouthinkIam »

montado wrote: Tue Jul 27, 2021 7:13 pm I would definitely stick my fleshlight in there.
Would be much more useful attached to the control column.

https://youtu.be/KWN2B_Q4gy0?t=60
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by digits_ »

sunk wrote: Wed Jul 28, 2021 1:11 am I filled the empty holes with a CO2 detector, vertical compass and and an outside air temperature gauge.
which co detector did you build in?
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by Stinky »

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Re: Useful way of using an empty 2-1/4” instrument hole

Post by digits_ »

A holder for those cheap CO detectors would actually be pretty neat: https://www.aircraftspruce.com/catalog/ ... ectors.php

Does anyone know if that exists? That would solve them from ever falling down in turbulence. I could try and make my own of course, but an existing solution would be nice....
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by Beefitarian »

I would probably use it to dispense pepperoni and/or liquorice.
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by AirFrame »

How about a panel-mounted pulse oximeter?
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by sunk »

Co Guradian.
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by geodoc »

I vote for one of those cool vintage aircraft wind-up clocks.

Image




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Re: Useful way of using an empty 2-1/4” instrument hole

Post by notwhoyouthinkIam »

digits_ wrote: Thu Jul 29, 2021 5:37 pm A holder for those cheap CO detectors would actually be pretty neat: https://www.aircraftspruce.com/catalog/ ... ectors.php

Does anyone know if that exists? That would solve them from ever falling down in turbulence. I could try and make my own of course, but an existing solution would be nice....
Instrument cover plate and double sided tape.
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by goldeneagle »

notwhoyouthinkIam wrote: Sun Aug 15, 2021 6:31 pm Instrument cover plate and double sided tape.
Velcro holds up better in high temps.
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Re: Useful way of using an empty 2-1/4” instrument hole

Post by WrenchLacky »

Just do what every other pilot does when they find a random hole in their instruments. Fill it full with chewing gum and chocolate bar wrappers. Be sure to keep the porn behind the smoke goggle panels for easy access.
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