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DH and Ham Standard Hydromatic CSU ID

I am looking at CSUs which will work with the Merlin.
Various types prefixed AY are correct for de Havilland propellers, the letter Y being the rotation direction. HAY types are intended for Hamilton Standard propellers fitted to Merlins, and are basically the same.
Does anyone know what the prefix PAY means? I have come across it more than once and it isn`t in any of my APs.

Cheers

Pete

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By: Ken - 24th April 2010 at 06:54

DH Gipsy Queen CSU’s

Just thought I would refresh this post to see if anyone over the weekend can help at all, or suggest a possible supply. As I saisd I have a couple of AX-10’s but need type BX10… is the difference the direction of rotation perhaps? can it be reversed?

I dont as yet have a manual so can anyone help

many thanks

Ken

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By: Ken - 18th April 2010 at 07:28

Hello Pete,

Not sure what the ‘P’ relates to but I have come across it for the CSU’s I am after for the Queen 2 engines.

I am looking for a some type BX-10 CSU’s, I already have a couple of AX-10’s and am not sure of the difference as I dont have any manuals for them yet. Sorry to hijack the thead but if anyone can help it would be great.

Anyway getting back to Pete’s question I have seen these CSU’s listed as types PAX & PBX so whether the ‘P’ relates to the manufacturer perhaps?

Ken

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