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Mulliner Wood Frame Construction
#1
Hi

When I was working on a 1929 Mulliner saloon recently I found that the left-hand side of the wooden frame had been assembled using left-hand threaded brass screws.  I think these are original as the rest of the car has not been messed with.  A few of these screws are shown in the picture below.  Has anyone else come across them please?  Why would they do this – I don’t think the Austin factory used them?  Would this help stop the screws loosening when the frame shifts on accelerating/braking/cornering?? 

Colin


.jpg   Mulliner LH Screws.jpg (Size: 33.36 KB / Downloads: 843)
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#2
Blimey Colin! Is it April 1st already.
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#3
Its like the chief designer said to the youngster "and draw the other side as a mirror image"...
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#4
Perhaps the chap on the left hand side of the line was left handed? Wink
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#5
I'm lefthanded - not sure what that has to do with it? A few are bent - does anyone know where I can get replacements, please? Usual (reliable) suppliers don't seem to have them.

Colin
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#6
(29-03-2018, 04:30 PM)Colin Morgan Wrote: I'm lefthanded - not sure what that has to do with it?  A few are bent - does anyone know where I can get replacements, please?  Usual (reliable) suppliers don't seem to have them.

Colin
Not woodscrews but these are left hand thread:-

https://www.mutualscrew.com/department/o...-13401.cfm
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#7
Thanks, Austin

Colin
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#8
The supplier I spoke to today tried to sell me a left-handed screwdriver too - funny man.

Colin
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#9
(28-03-2018, 07:08 PM)Colin Morgan Wrote: Hi

When I was working on a 1929 Mulliner saloon recently I found that the left-hand side of the wooden frame had been assembled using left-hand threaded brass screws.  I think these are original as the rest of the car has not been messed with.  A few of these screws are shown in the picture below.  Has anyone else come across them please?  Why would they do this – I don’t think the Austin factory used them?  Would this help stop the screws loosening when the frame shifts on accelerating/braking/cornering?? 

Colin

I am intrigued - how on earth did you find out these were LH thread woodscrews ? Given that they would be very uncommon I suspect that anyone would normally spend some time tightening these screws, eventually resorting to damage !! 

Why LH woodscrews- I can see why some cars had LH axle nuts and centre lock wheels are usually marked left and right with instructions on the thread, but I cannot see why a screw would benefit from a LH thread ??

Cheers, Tony.
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#10
Hi

It always helps to have a screw driver in good condition that fits well - once the screw slot is damaged life becomes very difficult. Since they seemed very tight, I was using the usual trick with wood screws of trying tightening a bit more before loosening, and to my great surprise one came out!

Colin
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