marking out an elipse the backwoods way

[CRB]

I should have looked earlier.

http://www.mathopenref.com/printellipse1.html

 

[gordon stephenson]

Thanks for the education, very enlightening, Still baffled as to why the yanks would call a 0.001" a mill, they hate the metric system with a passion,

 

[zx9]

Whilst you are all at it, what about a millennium as in a thousand years not a million years?

 

[Maker]

Whilst you are all at it, what about a millennium as in a thousand years not a million years?

You can call a millennium a kiloyear if you want to, I don't know how many others will follow but I certainly will.

 

[Maker]

Oddly though 1,000lb isn't a Kilopound, it's a kip.

Because SI prefixes relate to metric units, not imperial. Imperial units are based on the length of three barley corns, you can expect them to be backwards.

 

[Windy Miller]

Great video - I like that a lot.

How do you I know the larger measurement though? The smaller one is obviously the diameter of the pipe, but where do you get the larger one from?

 

[zx9]

Great video - I like that a lot.

How do you I know the larger measurement though? The smaller one is obviously the diameter of the pipe, but where do you get the larger one from?

All you need is the angle of the flat plane on which the elipse will be formed and the diameter of the pipe, a bit of trig will give you the large measurement or you could just use a set of calipers at the same angle as the pipe passes through the plane much easier.

 

[Windy Miller]

All you need is the angle of the flat plane on which the elipse will be formed and the diameter of the pipe, a bit of trig will give you the large measurement or you could just use a set of calipers at the same angle as the pipe passes through the plane much easier.

Yeah that makes perfect sense!

 

[DanielW]

I'm a bit confussed,can yer help me.

Whats he wanting to do? with the cardboard? and where?

 

[MattF]

Great video - I like that a lot.

How do you I know the larger measurement though? The smaller one is obviously the diameter of the pipe, but where do you get the larger one from?

In that video, on the diagram he's drawn, he'd just measure between the two points where the angle meets the wall of the tube.

 

[roofman]

just cut a normal hole and have 2 off-set bends in the pipe..one on the inside and one on the outside