Reading Hawker Drawings

Thanks for the great explanation Powerandpassion. I understand it now. Sent a PM and yes I have a section of CCF made spare available.

Cheers

Jag,
thanks for your pm, sent email to the contact given. Would love to test some CCF spar material,
P&P

Thanks for the great explanation Powerandpassion. I understand it now. Sent a PM and yes I have a section of CCF made spare available.

Cheers

There is a book of Hawker A Standards. As P+P says above, it covers generic parts or processes that can be used throughout the range.

Other companies had similar – de Havilland had DHS; Junkers(!) had JuN; Vickers (and Supermarine) used VGS.

No idea where you would get a copy now; RAF Museum might be the place to start.

Bruce

A Std 183 drawings

On many of the Hawker drawings relating to tubes and longerons, the drawings say something like “All squares rolled to A. STD. 183/F” or “A. STD. 183.S” What does this mean?

Thanks

A Standards were an intrinsic part of the Hawker system of production, being standard parts that could be incorporated into different aircraft,
eg A Std 34 – clips, steel, A Std 390 – rivets, pop.

‘A Std 183- square sections from round tube’ refers to a key idea in the Hawker system of construction, which was a fuselage made from round tube with squared ends, joined by fishplates. Originated by Fred Sigrist, A Std 183 parts were used from 1925 – 1945, from Tom**** to Tempests.

A Std 183 features 26 tubular sections of different sizes, identified A- Z.

So 183/F is 1 3/8 OD tube with 1 3/16 X 1 3/16 squared ends
&
183/S is 1 1/2 OD tube with 1 3/8 X 1 3/8 squared ends.

For a copy of A std 183 please pm.
I am looking for Canadian Siskin or Canadian Hurricane spar remnants for metallurgical analysis !

Hi Ron,
If you already have the tubes ‘squared’ then surely you are passed the point of needing to know? Were the tubes original Hurricane ones or new tubes you have had squared?
I would assume the ‘A.STD’ refers to the accuracy of the dimensions quoted ( A standard, B standard etc) and the 183 number refers to the particular squaring at that joint.

Thanks for responding Tony. I have complete tubes with square ends. But any idea of how you read the spec?

They used to roll the ends of the tube to a square section where they connected them. The spec will be what they worked too.

If you look down this page to the tenth picture you will see what I mean

http://www.jneaircraft.com/am274/2006-2/

.