Go to Post Some advice I wish I had as a college freshman: If you don't understand it, or are struggling to keep up, ask for help. - DonRotolo [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #15   Spotlight this post!  
Unread 28-01-2007, 13:10
Raul's Avatar Unsung FIRST Hero
Raul Raul is offline
Somewhat Useful Person
no team (Formerly - Wildstang)
 
Join Date: Oct 2001
Rookie Year: 1996
Location: Greenville, TX
Posts: 599
Raul has a reputation beyond reputeRaul has a reputation beyond reputeRaul has a reputation beyond reputeRaul has a reputation beyond reputeRaul has a reputation beyond reputeRaul has a reputation beyond reputeRaul has a reputation beyond reputeRaul has a reputation beyond reputeRaul has a reputation beyond reputeRaul has a reputation beyond reputeRaul has a reputation beyond repute
Re: Risk of the Lift?

Quote:
Originally Posted by RaMoore View Post
Could you be more specific with what teams can expect then for lifting? 1/2 of 188lbs? 1/4 of 188 lbs?

Just some ball park estimate because I think alot of teams did the math and came up with 188lbs and rejoiced (we did). If this isn't what they should expect then I think i'ts important you get information out there.
Our experiments showed that a typical cylinder under load could only "Move" between 80 to 85% of it theoretical maximum force. This is probably due to frictional forces in the cylinder and the rest of the mechanisms it was driving. There is also the affect of the transmission of pneumatic energy through the small hoses and valves.

This is no different than motor driven systems. Think of how the efficiency of a gear box reduces the actual transmitted power in those systems. We have learned to not expect 100% of the motor's torque to drive the final system. Another way to think of it is that we do not expect a motor to drive a system at its stall torque - it can hold that much torque - thus the term stall. It cannot drive at that torque. The analogy is that a pneumatic cylinder "stalls" at the rated max force. But it cannot move anything with that much force. And of course the inefficiencies reduce what force it can move.
__________________
Warning: this reply is just an approximation of what I meant to convey - engineers cannot possibly use just written words to express what they are thinking.
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Risk tournament [527]phil Games/Trivia 1 29-09-2005 17:22
Interface of the window lift motors Marjory Frosty Motors 3 14-01-2005 22:57
PHP as a security risk purplehaze357 Website Design/Showcase 9 02-07-2003 21:50
A little lift for the final week George1902 General Forum 1 11-02-2003 22:48
Amount of Force to lift the bridge? archiver 2001 2 23-06-2002 23:21


All times are GMT -5. The time now is 04:48.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi