Gore Design for
Oblate and Prolate Elliptical Airforms

by Bernhard Haussler

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Intro/Disclaimer

Rotated-ellipse shapes

About Gores

About the Spreadsheet

Tips

Interesting Ellipse Stuff

Most of the Math

Links

Spreadsheet

Making a Scale Model

ITSA Conference

Introduction

The way this little piece of information came to be was I met a lady at the first FerroCement Convention in Lorane, Oregon, USA, in June 2004 half way around the world from where I live [Namibia]. About a month later she posted a call for help with the design of the gores for the airform of her planned FC oblate dome home on the Ferrocement.net e-list. I volunteered and after designing gores for a prolate airform, found out what she really wanted and did the design for an oblate airform.

She then asked me whether she could share this information with friends and acquaintances to which I agreed unreservedly. Her next contribution was to suggest making the spreadsheet available on the web to which I also wholeheartedly agreed.

So, this little article is the result of the gift of humility in a person who has learned when to ask for help. It simply makes sense to me, as all knowledge is a gift to humanity, this little piece of knowledge should be out there somewhere for all to find.

My thanks also go to Nori who helped with sketches, spent a lot of time reading and critiquing the drafts and then supplied all the web-links.

I hope it helps you.

B W Haussler P O Box 11326
Windhoek
Namibia
9000
hangar@iafrica.com.na
+ 264 61 244248
[I am in the GMT +2 time zone]


Indemnity

I have made this information available to support those who choose to do things themselves and also to share some of my knowledge with the world at large via and in support of the services of the FerroCement.net website. I cannot, however, accept any liability of any kind for any consequences arising from the use of this information. You make use of this information entirely at your own risk.

In its original published form, the spreadsheet is accurate. If, for whatever reason, the result you obtain is incorrect, or differs from your expectations, you are welcome to contact me at hangar@iafrica.com.na and I will try to assist you as time allows.

Intro/Disclaimer | Rotated-ellipse shapes | About Gores | About the Spreadsheet
Tips | Interesting Ellipse Stuff | Most of the Math |