1" Boeing Gauges

[iwik]

Can anyone who has these gauges tell if it is easy to change the
scale. I am in need of a 1" gauge for my Cessna project. This being
a dc operated one makes the job easy. I have a real gauge from
a Cessna but to fit a drive motor is quite messy.
Thanks
Les

[mickc]

Hi Les,

Not that difficult at all, once it is out of the case, you can just stick something over the original back plate.

I will pop one open tonight and send you a couple of photots

Im assuming this will be for the suction gauge?

[iwik]

Thanks Mick,
Some pics would be great. Yes i have to get two, one for suction and
the other for fuel pressure. Are all the 1'' gauges of the same construction?.
Les

[mickc]

Hi Les,

Here are a couple of pics from the inside of the 1" gauge.

http://imgur.com/a/pC9m0

As you can see it would be quite simple to apply another scale to it, and this is lit form above, bit behind , so no dramas with backlighting.

The only thing you may need to consider is that there are positive end stops at each end of the scale, so you wont be able to simulate the way the Cessna suction gauge drops off to the bottom of the gauge after the engine shuts down.

If you need any specific shots, just let me know.

Cheers,

Mick

[iwik]

Thanks Mick,
Much appreciated, i am not a perfectionist so it does not have to
work 100%. Will see what i can do when it arrives.

On another point, have you ever tried to convert a dual needle
gauge like Cessna use for their MP/Fuel Flow one. This had small
bellows for each gauge and you you know they are highly geared
as they move so little to drive the gauge. Trying to work out what
to use to drive this gearing or what else as the space is limited.
Regards
Les

[mickc]

Hi Les,

No problem mate,  I have converted both dual needle and bellows driven instruments.

Bellows are virtually impossible to drive accurately in a sim environment, so driving via servos & gearing is the easiest option.

Dual needles aren't too difficult to do either as long as the gauge has room inside it to work with.
As mine were Boeing gauges, i had to make everything fit inside the original casing because they slide into the panel from the front

Have a look here to see some info on how I did both types:

https://www.facebook.com/Micks737/posts/728598037249532   Bellows

https://www.facebook.com/Micks737/posts/787008744741794   Dual Needle

[iwik]

Thanks Mick,
Yes i came to the conclusion that gears and a servo is the way to
go. Though in my case space is really limited. But you have given me something to think about.
Regards
Les

[iwik]

Mick.
How have you mounted this gauge. I see it has threaded portion and
suspect there was some sort of ring that screwed on. Any tips would be appreciated. Thanks
Regards
Les

[mickc]

Hi Les

There is no threaded section, the outer bezel has grooves cut into it that provide grip when pulling the gauge out of the panel.

You need a clamp like this :

http://www.avionicsmounts.com/MS28042.php#round1

Nick at AHPS usually has these second hand

[iwik]

Thanks Mick,
Ah i see, looks like a clamp from a chassis mounting electrolytic
cap should do the trick. I thought it might have been like the Cessna
ones which had two threaded rings to mount.
Regards
Les

[Joe Lavery]

Hi Guys,  this looks like it would do the trick...

http://www.justradios.com/clamps.html

Just $3.49 for a 2" and $1.99 for a 1"

Joe

[iwik]

Thanks Joe.
Regards
Les