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Slippery Anne is coming together

A long time since I posted anything about my build, but Slippery Anne is now coming together, as much as she looks like a wooden aeroplane in this picture, she actually has the feel of a car now and not the collection of bits and bobs she has been for so long.

Regards, Mark.



 photo IMG_1398_zpsskeemi22.jpg

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Re: Slippery Anne is coming together

Good to see her progressing Mark, interesting treatment at the front of the chassis for the spring mount!
Keep up the good work, it is a shame your mentor is not here to see this I am sure she would have been most pleased.

Location: NZ

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Re: Slippery Anne is coming together

Hi Mark,

Loving the work, looks great, any chance of more pictures? Would be great to see a close up of the joining techniques used to construct the tail, looks like you've spent a couple of hours!

I've got the same tyres on my special, made that mistake before.

Tom

Location: Eye on the Norfolk / Suffolk border

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Re: Slippery Anne is coming together

This looks excellent - thanks for sharing.

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Re: Slippery Anne is coming together

+1 on the "more photos", as they say.

That woodwork looks to be quite complex, Mark. Have you been doing it from calculations or just by 'eye'?

Location: Llantwit Major

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Re: Slippery Anne is coming together

Hi Tom,
The tail is a glued structure, it is in fact built using the same materials and adhesives used to construct wooden airframes; the glue used is Aerolight 306.
My challenge in building this car is to get the shape correct, I imagine that back in the day they allowed the wood to assume natural bends and curves, if I did that, then the car would have a different shape to the original body, dictated by the grain and density of each individual piece of wood. So almost every piece here is made up of laminations. The resulting structure is very light, strong and dimensionally stable.
The tail will ultimately be covered in doped Irish linen.

I have attempted to make the body exactly as it was in 1925, but do rather struggle to fit into it, so have not completed the structure behind the drivers sest, I may just need to alter this once we start running the car.

Mark

 photo IMG_1389_zpshvsow0m8.jpg

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Re: Slippery Anne is coming together

What a superb piece of work, Can't wait to see her finished.

Re: Slippery Anne is coming together

Brilliant, well done.

Location: Oakley , hants

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Re: Slippery Anne is coming together

 photo dovetails.jpeg

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Re: Slippery Anne is coming together

I would guess to expand the surface area of the rib contact point, and the glue acting in shear enables the rib to support a greater vertical load.

Location: oz

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Re: Slippery Anne is coming together

Hello Rob,
You asked me if I used calculation or eye, well
It is a mixture of both, mostly calculation, but always balanced with, 'does it look right?'

My approach has been to scale everything from the period photos against the known dimensions of surviving original components. Then to produce a working drawing, then a template, followed by offering it all up and judging if it looks correct against the period pictures.

 photo IMG_1412_zpsw9busbn2.jpg

John asked why the stringers have 'dove tails' under them; these stringers form a complex compound curve, which unlike the stringers used for the side of the tail I could not plot to my satisfaction on a drawing, so I needed a mounting system which allowed me adjustment during assembly whilst giving a reasonable surface area for the glue and imparting some rigidity to thouse formers made of ply. The following picture taken during assembly of the upper stringers demonstrates my approach, if you look carefully a period picture is laid into the fuel tank mounting against which I am checking the stringers look just right.

Regards, Mark.

 photo IMG_1357_zpsfrwy9uym.jpg

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Re: Slippery Anne is coming together

Quote: squeak
I would guess to expand the surface area of the rib contact point, and the glue acting in shear enables the rib to support a greater vertical load.


Hello Squeak,

Yes, just so.

Regards, Mark.

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Re: Slippery Anne is coming together

Thanks, Squeak and Mark, for your replies. That makes sense. I had wondered if they were to help adjust position but hadn't thought about the additional strength and rigidity.

A lovely piece of work, Mark. seems a shame to cover it.

John

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Re: Slippery Anne is coming together


Hi Mark,

Thanks for the close up photos, really beautiful work, I take my hat off to your woodworking skills. I can't work out if there's a recurve on the sides of the tail or whether it's just an optical illusion?

Looking forward to seeing the progress.

Quote: John Mims
seems a shame to cover it.

John
I'll second that!

Tom

Location: Eye on the Norfolk / Suffolk border

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Re: Slippery Anne is coming together

Hi Mark

Surely the original car was not so ornate? Will you be able to bring yurself to risk all that meticulous work racing? Hard enough to cover it up.
Do you have details of the original, or just exterior photos?

Location: Auckland, NZ

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Re: Slippery Anne is coming together

Splendid news Mark. Very impressed! Delayed response because I have been away, not because I was too stunned to write! Have no fear, you will get in it somehow.
Regards, Stuart

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Re: Slippery Anne is coming together

Bob,

Mark wrote-

"I have attempted to make the body exactly as it was in 1925, but do rather struggle to fit into it, so have not completed the structure behind the drivers seat, I may just need to alter this once we start running the car."

and later-

"My approach has been to scale everything from the period photos against the known dimensions of surviving original components. Then to produce a working drawing, then a template, followed by offering it all up and judging if it looks correct against the period pictures."

So I suppose the original car was as you call it 'ornate'.

Cheers, Tony.

Location: Melbourne, Victoria, Australia.

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Re: Slippery Anne is coming together

Quote: Bob Culver
Hi Mark

Surely the original car was not so ornate? Will you be able to bring yurself to risk all that meticulous work racing? Hard enough to cover it up.
Do you have details of the original, or just exterior photos?


Hello Bob,

I am worried that the tail will get damaged, but have to take that risk, in respect of covering it, it is all visible from inside the cars cockpit, so thats ok.

I think ornate is probably not the word here because it implies superfluous ornamentation, to understand the tail structure of the car, we do need to move our thinking back to the world of 90 to 100 years ago, also the design rational of the car in the context of the time with available materials and skills of the time.

Structures like this were a common thing at this time and nothing in them was superfluous, it all had a job to do. Remember that in the period Austin was an aircraft manufacturer, producing structures which looked, and worked, exactly like this one. Every other woodworker of the day, male or female, could make assemblies just like this.

So thinking back to the design rational for the car, it had to be strong and light, why not use the principles of aircraft manufacture? It also had to be aerodynamic, again, an open structure covered in fabric, then doped until it is drum tight is certainly that. The cars tail also needed to carry a reasonably large fuel tank, so the structure had to carry this load.
A big help to me with the tail is that doped linen shows what lies beneath very well, the following picture as a case in point, the car was a good 12 to 18 months old when this picture was taken, by which time the stringers had started to quilt around the substructure frames, all of which helped with my interoperation of what lay beneath the surface. I also have some pictures which show a partial view into the tail, in which some of the frames are visible....just!

 photo ISA Chassis 2_0002_zpsfv1qtgdh.jpg

Yesterday I decide to reorganise my garage and make some more room, so rolled all my kit out into the drive, it was quite a day as for the first time Slippery felt the sun on her chassis, this also gave me the chance to take some pictures from a distance, which make the whole thing look far more delicate and less ornate- much more form following function.

I am trying to make the car as it was back in 1925, accepting the issues that will result, so have retained 6" brakes and wheels and so on, I have howver decide to fit a starter motor, just to make things more practical. Similarly, I have used a more recent wood glue (from the 1930's) to ensure durability.

Another big event this week will be running the engine with the supercharger hanging out of the front, fingers crossed.

Regards, Mark.


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Re: Slippery Anne is coming together

That is a masterpiece!. Nothing quite like getting far enough away from it to give it the proper "eye". In general the rule is "if it looks right it is right" and I think you have cracked it there.
It's very easy to pass adverse comment, very often by those who "can't do".
You obviously can, well done that man!

Location: Ripon

Re: Slippery Anne is coming together

Quote: Mark Atkinson

Another big event this week will be running the engine with the supercharger hanging out of the front, fingers crossed.

Regards, Mark./quote]

I trust you will be filming this historic moment, Mark?
Regards,
Stuart

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Re: Slippery Anne is coming together

Quote: stuart ulph
Quote: Mark Atkinson

Another big event this week will be running the engine with the supercharger hanging out of the front, fingers crossed.

Regards, Mark./quote]

I trust you will be filming this historic moment, Mark?
Regards,
Stuart



I second Stuart's comment and hope that you will allow us to see the footage, fabulous stuff Mark very well done!

Location: NZ

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Re: Slippery Anne is coming together

Thank you so much for sharing this with everyone, and thank you for bringing something back to life which otherwise would only be seen in photographs. The chassis and body work look amazing and is a massive credit to the amount of research and work that you have obviously put in to getting each part just right. Awaiting updates (and to see that amazing blown engine) with bated breath.

Location: New Forest

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Re: Slippery Anne is coming together

Thanks Mark

Certainly fits the photo. Having been involved in the maintenace of traditional sea scout cutters the complex construction should not have been surprising. I had in mind a somewhat basic looking car, but now realise this was Mrs Jo Jo.

I have read that the body for a production MG M cost L6.10s so was presumably somewhat more simple! Although still a fortnights wage.

Location: Auckland, NZ

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Re: Slippery Anne is coming together

Bob,

I think Slippery Anne and Mrs Jo Jo competed against each other at Brooklands

http://austinharris.co.uk/taxonomy/term/118%2C115/photo/1928-jcc-200/509?page=56


Cheers, Tony.

Location: Melbourne, Victoria, Australia.

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