Folding fabric satellite TV dish - Page 2 - SailNet Community
Reply
 
LinkBack Thread Tools
post #11 of 12 Old 11-15-2012 Thread Starter
Senior Member
 
Join Date: Jan 2011
Posts: 765
Thanks: 0
Thanked 19 Times in 19 Posts
Rep Power: 6
 
Re: Folding fabric satellite TV dish

Yes, I have done the numbers especially since weird optics is my occupation.
FIRST for Hellosailor. my fabric is more conductive than most metal dishes. Hence, for microwaves it is more reflective.
Figure accuracy is not much of an issue either. For a mirror to achieve best performance, its shape does not have to be better than 1/4 wavelength accuracy (Rayleigh proved it) and that means about 1/2" here. I will easily be better than 1/8 wavelength accurate.
When the fabric is taut, it is very strong and is held rigidly in the frame. It is not a wimpy umbrella-like frame. NASA used that for being lightweight, after all, no wind on the moon. Also notice its poor figure accuracy.
Frogwatch is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 12 Old 11-15-2012 Thread Starter
Senior Member
 
Join Date: Jan 2011
Posts: 765
Thanks: 0
Thanked 19 Times in 19 Posts
Rep Power: 6
 
Re: Folding fabric satellite TV dish

AS far as hot girls go, I'm a physics geek. I bore them and they bore me, no danger of me dressing any of them in shiny stuff.
Frogwatch is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Evironmentally-friendly hand/dish soap dvuyxx Cruising & Liveaboard Forum 12 06-13-2012 09:52 PM
Replacing big with small dish antenna? SanDiegoChip Cruising & Liveaboard Forum 0 10-12-2011 11:16 AM
Anti-dish breakers? SanDiegoChip Gear & Maintenance 23 03-24-2010 04:51 PM
dish racks (and a long story about why I'm asking) jimmalkin Gear & Maintenance 14 06-12-2008 10:30 AM
pan pot dish ? JosephDive Provisioning 3 03-23-2004 02:43 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome