Hawker Aircraft Tube-squaring Device

Hi Jag248, I guess you might have to supply your own tubing & i’m not sure what sort of quantity ! not a lot of help really !! I think at Airframe assemblies we may have used both Hawkers & aerovintage for tube squaring.

Steve”P”

Thanks Tony. These links are cool.

Thanks Steve. I’m assuming that I would have to supply the tubing to Hawker Restorations or will they square one or two off tubes?

There was a set of rollers etc on evil bay a year or so back for making these.

You can also get the tubing here

http://www.aerovintagespares.com/avspares/copy_of_copy_of_Streamline_Tubing.html

Dimensions here

http://www.aerovintagespares.com/avspares/copy_of_copy_of_Oval_Rolled_Aircraft_Sections.html

Hi all, if you want tube squared up then Hawker Restorations at Milden in Suffolk can do this.

Steve”P”

I would like to find the drawings for all the Accles and Pollock streamline sections… 🙂

Where would I find drawings of the standard rolls?

Dave, are you planning on reverse engineering this machine?

Thanks again Ross

I wonder where all the Hawker drawing archives are? I’d like to find a drawing for this machine.

The machine you see in the picture was reverse engineered from photographs and some original rolls that were found (in South Africa I believe). As far as I am aware there are no surviving hawker drawings for the squaring machine but the drawings do survive for the standard rolls, I would love to be proved wrong on the machine drawings as it will save me some time that I am spending re-drawing!!

Thanks again Ross

I wonder where all the Hawker drawing archives are? I’d like to find a drawing for this machine.

Not used this machine but looking at the rollers below the bench it looks like one corner and two sides per roller.

The cold drawing one I had experience of back in the 80s took between 2 to 3 passes before the work hardened and had to be treated before the next 2 to 3 passes.

Usually the task was done in the first 2 to 3 passes.

Waste end of tube was belled and gripped by chain draw then 1st pass die (rectangular or square to suit) which had slightly oversize rounded corners and sides clamped round it (2 or 4 interlocking sections)

The tube was then pulled through the 1st die.

Next the tube was returned to start and die changed to finishing die of required section.

1 or 2 more passes to give final section form and polish.

Final action was to cut off drawing end to leave reduced section of required length.

Regards
Ross

Think of it as a combined English Wheel and slip forming rolls.

The handwheel on top puts manually incremented pressure on the tube to reduce the section. Each pass a twist reduces the gap slightly.

The gears allow the turns of the crank handle to draw the section through the rolls until the required length is cold formed.

Regards
Ross

Thanks Ross,

So does it take several passes to square each end. Are all four sides of the tube squared at the same time?

It loos like the rollers draw the tube through, via the gears and the crank handle. The handle at the top looks like it determines the placing of the rollers.

Think of it as a combined English Wheel and slip forming rolls.

The handwheel on top puts manually incremented pressure on the tube to reduce the section. Each pass a twist reduces the gap slightly.

The gears allow the turns of the crank handle to draw the section through the rolls until the required length is cold formed.

Regards
Ross