Hi there,

The part numbers you have quoted can be de-ciphered as follows:

A17-12C = Aluminium Alloy Bolt 2BA thread with plain length of 1.2″ anodised finish (replaced by A28, which in turn has been replaced by A61)

A16CP = Ordinary 2BA Plain Nut

AGS970C= 2BA Light Alloy Plain Washer

The other numbers mentioned would probably be references to the manufacturer’s own ‘standard practices’ or Design/Data Sheet. The locking could take the form of peening the protruding end of the bolt to lock, or cutting/filing flush and centre punching the join of the threads for nut and bolt. Percival Aircraft for instance use DS114 for locking the nut/bolt by peening. This is contained in leaflet DC-01-02 of the Drawing Office Handbook.

Hope this is of interest.

Regards

Dave

Hi there,

I’ve just had a quick look at my copy of AP2337 Vol1, and although there is lots of information there no wheels or brake units are referred to by aircraft type. They are all listed by part number.

What are the p/ns of the items you are trying to identify? If you let me know I can have a quick look for you.

If you PM me your address I can send a copy to you, but not sure how much specific information you’ll glean from it.

Not too much help I’m afraid.

Regards

Dave

My copy of AP1086 Sect 6B dated 10th October 1960 has the following listed under Compasses, gyro magnetic, Mark 4B:

Indicator, master Type A Sec/Ref 6B/1996

No aircraft type listed for the indicator.

Hope that helps

Regards

Dave

One of my copies of AP1086 Sec 6A, this one dated 6th September 1966 to AL/181 has the Mk28 Altimeter as fitted to the P1127. I would hazard a guess that it was also fitted to the later Harrier aircraft as well.

This copy of AP1086 has the sec/ref for the altimeter as: 6A/10558, I would suspect the number you’ve quoted as being just a part of the Nato Stock Number NSN. A close up pic of the label would make it clearer.

Hope that helps.

Regards

Dave

Hi Ken,

I do have some pullies…..somewhere!! Not sure what size or qty, but will have a look for you. It may take a little time though.

Regards

Dave

Fairey Aviation Propeller drawings

Hi all,

I’ve been having a rummage around the filing cabinet tonight as I knew there were some Fairey Aviation drawings/blueprints in there.

I’ve come across the following types:

A66753 for Gipsy Major 1, 8 & 10mk2 (pics attached showing drawing extracts) for Chipmunk and Auster

A66875 for Gipsy Major 1C, 10mk1-1, 10mk1-3, and 10mk1-7
for Miles Gemini
(the pic showing special finish for racing isn’t particularly clear but states: Propellers manufactured for racing purposes on the WPO Nos quoted below must have the rear face of the blades painted with matt black paint to DTD34 and subsequently rubbed down with fine rubbing paper to produce a smooth surface before application of the yellow tips.

This is for WPO C4345 and C4904

A66167 for Walter Mikron II for Tipsy B and Fairey Junior

A67931 for Gipsy Major 10mk2 for SAAB Safir

All the above drawings only give details for the blades to be anodised and dyed black and then yellow paint applied to the tips, with the exception of the racing propellers mentioned above. The only part to be painted black are the bosses, with the exception of the faces which contact the blade or the hub flanges.

On the drawings there is an area depicted on the blade which is not far out from the painted markings shown in the other pictures, this is detailed as being for the surface table and c/l of the surface table where the tracking dimensions are taken from. So although the painted line may not be on the blade from manufacture, perhaps as part of the checking of the blade tracking there is a painted datum and that’s what the line is????

Some of the blueprints are stamped up WESTLAND Engineering Division 24 Sep 1984, when my father obtained these from Westland he was told that these would be the only copies as they were going to destroy the others they held, how true that would be I don;t know.

If you need anymore detailed views of the drawings let me know and I’ll see what I can do as they are too big to scan areas, but may be able to manage more pictures.

Hope that’s of some use!

Regards

Dave