Hi everyone,
I purchased a lot from and estate sale a while ago and found this interesting piece which I would like to learn more about. I have tried doing some research on my own but haven’t found any similar examples to the piece I have. This, as well as other clues on the piece itself have lead me to believe that this may be a piece of an Avro Arrow. I just do not know how to confirm this belief. The metal identification tag on the gauge says Avro Aircraft with a serial number and manufactured in Canada by Aviation Electric Ltd. The most significant piece of evidence is on the side of the gauge which says “date of M….. Jan. 1959” which is one month before the Avro Arrow was canceled and soon to be destroyed. Any help in identifying this piece is appreciated. I would also like to know why this gauge says push to test? Most other aircraft oil pressure gauges i have seen online do not have this.
By: Arabella-Cox - 25th January 2022 at 21:20
It is worth noting that during the 1950s AV Roe Canada restructured into two separate companies; Avro Aircraft Ltd, and Orenda Engines. They both had a very diverse portfolio of interests – they were much more than just the Avro Arrow project
By: bazv - 25th January 2022 at 19:24
The push to test I think is a safety feature,by having a shut off valve just before the actual (Bourdon Tube) Gauge Dial,it would prevent hot oil spraying around in the event of gauge failure (ie if the internal bourdon tube fractures).
I do not know what application they would use that kind of gauge for,in the cockpit they had automatic valves which shut off oil flow in the event of a gauge leak,they were called a Gauge Relay,inside the relay body was a small piston which allowed fluid to flow through if the pressure was equal on both sides of the piston – however if the gauge leaked or the tube fractured – the relay piston would sense the drop in pressure and move towards the gauge to shut off any oil flow.
If it is a ground test valve somebody sure made a very neat job of the wire locking (safety Wire) ☺️
By: mk2345 - 25th January 2022 at 15:24
Thanks! I had a slight suspicion that it might ground related for testing of some sort but I couldn’t find any examples.
By: Sopwith - 25th January 2022 at 13:13
I am sorry I can’t help you out but if it is from Avro , I would think it would be ground related not airborne, going by the push to test button as for a flying gauge you would need a constant reading to monitor.
I stand to be corrected, but anyway welcome to the forum.
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January 24, 2022 at 5:40 pm