Author Topic: A little aviation history...  (Read 4178 times)

Offline genec

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A little aviation history...
« on: June 03, 2011, 11:07:27 AM »
Hello all MWF members

This is my first post for a long time, have been extremely busy relocating back to Malaysia and also caught a little of the very nasty travel bug..

thought I would contribute a post for my  own welcoming back. hehe


Can you all guess what this is?
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Nope it's not a B&R

I got my hands on this little piece of aviation history while braving the treasure cove of Portobello market.
I have to admit I have no idea what it is, even the old man selling it says he have not a clue and had got it from a scrapyard that strips old unfit for service aircrafts.

But what intrigues me is the MOD (Ministry of Defense) plate on the top of the base, indicating this piece of equipment might once be on one of the RAF plane.
I did a dig around on the history of the maker, (god bless Google).

It's a company called Mechanism Ltd. Croydon. and they are active in the 50s and 60s, making aviation equipments (barometer, marchmeter, etc) for civil and military aircrafts. And in the 70s, they were taken over by another company that is equally rich in history, Negretti and Zambra. they have been around since 1800s, and is a specialist in optical instruments, they were once the british royal family's appointed opticians and scientific instrument maker.
Pretty amazing history considering I paid 8quid for it (the opening price was 25!!!)

Now, I still have no idea what it is, I've tried searching for the serial number, but alas there won't be a database for such an obscure equipment.
I'm guessing it's some kind of pressure gauge, since it has the unit Ins Hg inscribed on the face.

Just sharing a little history project I've embarked one sleepless night.





See how aviation watches got their inspirations from? =)


Offline TheHobbit

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Re: A little aviation history...
« Reply #1 on: June 03, 2011, 11:45:22 AM »
If you can post a better photograph, I can check with my instructors what gauge and where it might be from.

Offline takashi78

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Re: A little aviation history...
« Reply #2 on: June 03, 2011, 12:28:53 PM »
Welcome back bro !

Interesting gauge you got there.

Hobbit has lots of connections so he can help you out hehe....

BTW what size is the gauge?

Offline TheHobbit

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Re: A little aviation history...
« Reply #3 on: June 04, 2011, 05:26:03 AM »
What I got so far....

'This is an instrument used on piston engines from pre-war up to about mid-sixties. It is a manifold pressure gauge hence SUCTion. They were also used as sub-standard gauges for testing purposes. Since it only goes up to 10" it is certainly for a normally aspirated engine and not a supercharged engine that would go over +30" (+25" for a RR Griffon).'

Offline dennis.T

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Re: A little aviation history...
« Reply #4 on: June 06, 2011, 08:28:07 PM »
Hobbit...u really impress me, u are like a walking dictionary.. :o