turretboy
April 22, 2008 at 5:27 pm

Turret – Rotating Service Joint

I recently acquired this rotating service joint & valve box for a Fraser Nash rear turret.

The hydraulic service enters/exits through the swiveling bottom portion. The O2 is delivered up thought the center to a flow meter, from there to an economizer and to the gunner’s mask. The last photo shows the unit from my FN121 project.

The configuration of my latest acquisition is a little different.

Does anyone know the purpose of the unit at the very top? The stores reference number looks like AM 6A/1805 or AM 6AA 1805. I believe it’s related to the oxygen supply.

Regards,

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By: turretboy - 2nd May 2008 at 13:40

Thanks Martin!

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By: hindenburg - 30th April 2008 at 20:27

Yes,The bit you have is off an FN82 series two turret,The plastic bit on top is the rotation (azimuth sensor) which relays to the turret position indicator.I Have the same on my FN82 turret.

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By: turretboy - 23rd April 2008 at 20:13

Absolutely

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By: Pathfinder - 23rd April 2008 at 19:58

No problem 😉

Mike, can I use your photos for my API-Forum ?

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By: turretboy - 23rd April 2008 at 18:55

Thank you Nils!

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By: Pathfinder - 22nd April 2008 at 22:38

Hi Mike,

AM 6A/1805 is the “Turret position transmitter 24 Volts”, Code No. should be “169 F.L.”

Source: An illustrated guide to British Aircraft Equipment 1929-1945, by Alan Hulme, Volume 1, page 24

Regards
Nils