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Author Topic: Cone drawing program  (Read 682 times)
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3view
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« on: September 26, 2015, 03:58:28 PM »

I use a computer drawing program to make conical shapes for EDF intakes and exhausts.

My favourite is Cone Layout

https://www.conelayout.com/

ConeCalc works quite well and is free!

http://www.i-logic.com/conecalc.htm

Steve
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Hepcat
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« Reply #1 on: March 14, 2017, 09:23:06 PM »

3view,
I thought the attachment below might amuse you.  Truthfully, as I was reading your post I stretched out my right hand and pulled out the end book on the bookshelf, 'Practical Geometry and Engineering Graphics' by Abbott.  Anyone taking up draughting sixty or so years ago would have had at least one of Abbotts text books.  I treasure this one because it was a discard from the RAF Cosford library. I have just copied the page with the simple straight and oblique cones.  Other pages have intersecting cones  and cones and cylinders ...   Draughting could be sheer hard work before computers. 
John 
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aardvark_bill
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« Reply #2 on: March 14, 2017, 09:54:12 PM »

Hepcat,
I googled the text that you referenced as I like old books and it looked interesting.  I found a copy on Ebay for sale in Perth, Australia.  It had a couple of pictures and I could hardly believe it - it was of the same pages that you copied!

http://www.ebay.com/itm/Practical-Geometry-and-Engineering-Graphics-W-Abbott-1967-/271235876519

Amazing coincidence.

Billy
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Andrew Darby
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« Reply #3 on: March 15, 2017, 04:39:10 PM »

Gosh, I did hours of those cone constructions in technical drawing at school, and yes thank goodness for computers  Cheesy

When I did the cone for the paper front end for the VMC I used Inventor and the "sheet metal" function which made a good job of getting the shape right...

Andrew
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Hogwash I tell thee!
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« Reply #4 on: March 17, 2017, 06:47:03 AM »

Very interesting.

I guessed there must be a long-hand method of drawing these shapes.

The 'cone-layout' program was developed for making the intricate exhausts on 2 stroke racing motorbikes.

Steve
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