Classic cars forum & vehicle restoration.

Roger-hatchy · Joined: 07 Dec 2007 Posts: 2135 Location: Tiptree, Essex

This is engineering at it's finest

http://www.youtube.com/watch?v=3YfTtGCsiD8&feature=share

Jim.Walker · Joined: 27 Dec 2008 Posts: 1229 Location: Chesterfield

Wonderful skills! I wish I could do that! Or even had the patience and stamina to do so.
But I was surprised that the fastener tightening sequences were not by diagonal selection and seemed to go end to end.
But then I suppose oil and compression retention was not important on a non self powered model as there were no gaskets either. Nor I think, a lubrication system.
Jim.
_________________
Quote from my late Dad:- You only need a woman and a car and you have all the problems you
are ever likely to want". Computers had not been invented then!

peter scott · Joined: 18 Dec 2007 Posts: 7117 Location: Edinburgh

You might like this one too...

http://craftsmanshipmuseum.com/tomlinson.htm

CNC is a big help.

Peter
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http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon

Roger-hatchy · Joined: 07 Dec 2007 Posts: 2135 Location: Tiptree, Essex

Thanks Peter
Something to peruse over this evening.

Greg · Joined: 03 Dec 2007 Posts: 445 Location: Dreamland Margate

Beautiful!

peter scott · Joined: 18 Dec 2007 Posts: 7117 Location: Edinburgh

and more..

http://craftsmanshipmuseum.com/KnappCol.htm
_________________
http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon

Scotty · Joined: 23 Nov 2007 Posts: 883

Roger - That was positively spectacular, thank you for posting! Cool

47Jag · Posted: Sun Dec 04, 2011 10:01 pm Post subject:

It truly is an amazing piece of engineering but I'm confused by the camshaft gearing. It looks to me to be 1:1 as oppsoed to the correct 2:1. So my question is how does it get a compression stroke IE both valves closed?

Art

peter scott · Joined: 18 Dec 2007 Posts: 7117 Location: Edinburgh

Well spotted Art,

If you look at the camshaft I think the lobes are 180 degrees apart.
Remembering that it's not a real (4 stroke) engine but simply rotated by compressed air, I think the valves are arranged so that the inlet is open for the down stroke and the exhaust is open for the up stroke.

So compressed air isn't leaked when not required and the pistons give minimal resistance for the up strokes.

Peter
_________________
http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon

47Jag · Posted: Mon Dec 05, 2011 12:47 am Post subject:

Thanks Pedro,

I thought it was an actual functioning engine. I saw the pipe but thought it was fuel. I noticed a couple of pushrods were looking a bit loose as though the valves were sticking.

Art

Roger-hatchy · Joined: 07 Dec 2007 Posts: 2135 Location: Tiptree, Essex

Just under the Video window the text can be opened "Show More" for more detailed information.

47Jag · Posted: Mon Dec 05, 2011 11:25 am Post subject:

DOH!!

Art

Roger-hatchy · Joined: 07 Dec 2007 Posts: 2135 Location: Tiptree, Essex

Don't worry Art, first time I have notice it as well Embarassed

Jim.Walker · Joined: 27 Dec 2008 Posts: 1229 Location: Chesterfield

[quote="peter scott"]You might like this one too...

http://craftsmanshipmuseum.com/tomlinson.htm

CNC is a big help.

Peter[/quote

Totally gobsmacked!!!!
Jim
_________________
Quote from my late Dad:- You only need a woman and a car and you have all the problems you
are ever likely to want". Computers had not been invented then!