Return-Path: Received: from mail.viclink.com ([66.129.220.6] verified) by logan.com (CommuniGate Pro SMTP 4.2b2) with ESMTP id 3184305 for flyrotary@lancaironline.net; Thu, 22 Apr 2004 09:55:31 -0400 Received: from mail.viclink.com (p161.AS1.viclink.com [66.129.192.161]) by mail.viclink.com (8.11.7/8.11.7) with ESMTP id i3MDtNX60815 for ; Thu, 22 Apr 2004 06:55:25 -0700 (PDT) Message-ID: <4087CF03.5000100@mail.viclink.com> Date: Thu, 22 Apr 2004 06:56:19 -0700 From: Perry Mick User-Agent: Mozilla/5.0 (Windows; U; Win95; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Performance Props References: Content-Type: multipart/alternative; boundary="------------090406060602080404000508" X-RAVMilter-Version: 8.4.3(snapshot 20030217) (mail.viclink.com) --------------090406060602080404000508 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit echristley@nc.rr.com wrote: > > >http://www.aircraftspruce.com/catalog/bvpages/prop_duct.php > > >>-- >>Perry Mick >>http://www.ductedfan.com >> >> >> >> >> > >Thank you, Perry. I'm on it. > >I would like to clear up one misconception, though. >I don't want to start an off topic flame war, but >I've heard this several times and it's the sort of >thing that tends to confuse and restrict people. > >Algorithms can not be copyrighted. You can read a >book and publish everything you've learned on the >internet, as long as you don't copy several pages >verbatim. You can even reprint all the equations. >This is a right in the US that is protected by the >CONSTITUTION. > >There is another consideration, and that is that >Martin Hollman spent a lot of time writing a book >for a very limited market. He deserves his wages, >and if I can't get it from him direct, I'll buy it >from Aircraft Spruce (I assume his cut is larger >with AS' markup). Giving a workhorse his due is a >very valid concern, but 'copyright infringement' is >a red herring. > > > The "algorithms" aren't that simple and I don't want to take the time to try to put it in a form to upload to this forum. The program is based on blade element theory which you can probably find in many textbooks, and if you wanted to, you could make your own program from scratch that would do the same thing as this program. If I uploaded the program itself, that would surely be copyright infringement. Anyway, if you get the book, you also get to read about all the underlying theory. -- Perry Mick http://www.ductedfan.com --------------090406060602080404000508 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit echristley@nc.rr.com wrote:
  
http://www.aircraftspruce.com/catalog/bvpages/prop_duct.php
  
-- 
Perry Mick
http://www.ductedfan.com



    

Thank you, Perry.  I'm on it.

I would like to clear up one misconception, though.
I don't want to start an off topic flame war, but
I've heard this several times and it's the sort of
thing that tends to confuse and restrict people.  

Algorithms can not be copyrighted.  You can read a
book and publish everything you've learned on the
internet, as long as you don't copy several pages
verbatim.  You can even reprint all the equations. 
This is a right in the US that is protected by the
CONSTITUTION. 

There is another consideration, and that is that
Martin Hollman spent a lot of time writing a book
for a very limited market.  He deserves his wages,
and if I can't get it from him direct, I'll buy it
from Aircraft Spruce (I assume his cut is larger
with AS' markup).  Giving a workhorse his due is a
very valid concern, but 'copyright infringement' is
a red herring.
The "algorithms" aren't that simple and I don't want to take the time to try to put it in a form to upload to this forum. The program is based on blade element theory which you can probably find in many textbooks, and if you wanted to, you could make your own program from scratch that would do the same thing as this program. If I uploaded the program itself, that would surely be copyright infringement.

Anyway, if you get the book, you also get to read about all the underlying theory.
-- 
Perry Mick
http://www.ductedfan.com

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