Go to Post It also annoys me that I can't get all my pants with zebra stripes - marshall [more]
Home
Go Back   Chief Delphi > ChiefDelphi.com Website > Extra Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
Reply
Thread Tools Rate Thread Display Modes
  #16   Spotlight this post!  
Unread 05-07-2006, 20:21
Arkorobotics's Avatar
Arkorobotics Arkorobotics is offline
Robots!
AKA: Ara Kourchians
FRC #0589 (FalkØn)
Team Role: Mentor
 
Join Date: Nov 2005
Rookie Year: 2004
Location: La Crescenta, CA
Posts: 417
Arkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to behold
Send a message via AIM to Arkorobotics
Re: pic: Twin Fan Powered Vex Prototype#2

You know how jets landing on aircraft carriers with a cable, does anyone think that would work for this? Like have a cable out and have it hook on and slow it down?
__________________
2007 Rockwell Automation Innovation in Control Award winners (Southern California Regional)
Crescenta Valley High School Team 589
http://www.arkorobotics.com My Blag


3.141592653589793238462643383275902884197 <- Current memorization of Pi
Callsign: N6ARA
Reply With Quote
  #17   Spotlight this post!  
Unread 05-07-2006, 23:47
bear24rw's Avatar
bear24rw bear24rw is offline
Team 11 Programming Captain
AKA: Max T
FRC #0011 (MORT)
Team Role: Programmer
 
Join Date: Sep 2005
Rookie Year: 2005
Location: Flanders, NJ
Posts: 385
bear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to behold
Send a message via AIM to bear24rw
Re: pic: Twin Fan Powered Vex Prototype#2

Quote:
Originally Posted by Arkorobotics
You know how jets landing on aircraft carriers with a cable, does anyone think that would work for this? Like have a cable out and have it hook on and slow it down?
The only thing that i can see possibly going wrong with that is if it hit the cable and then bounces back... Do you plan on just having a length of cable pulled taught between two poles or something?
Reply With Quote
  #18   Spotlight this post!  
Unread 06-07-2006, 00:20
Andrew Blair's Avatar
Andrew Blair Andrew Blair is offline
SAE Formula is FIRST with Gasoline.
FRC #0306 (CRT)
Team Role: Alumni
 
Join Date: Feb 2005
Rookie Year: 2004
Location: Corry
Posts: 1,193
Andrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond reputeAndrew Blair has a reputation beyond repute
Send a message via AIM to Andrew Blair Send a message via Yahoo to Andrew Blair
Re: pic: Twin Fan Powered Vex Prototype#2

Why not just have it track in a circle? Bind up one wheel a bit, get in a large area of pavement, let it go, and when it comes back around at 20 mph, throw a coat on it.

Or you could just grab a friend and put him 75 yards downrange.
__________________
Reading makes a full man, conference a ready man, and writing an exact man.
-Sir Francis Bacon

"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
-Albert Einstein
Reply With Quote
  #19   Spotlight this post!  
Unread 06-07-2006, 01:08
bear24rw's Avatar
bear24rw bear24rw is offline
Team 11 Programming Captain
AKA: Max T
FRC #0011 (MORT)
Team Role: Programmer
 
Join Date: Sep 2005
Rookie Year: 2005
Location: Flanders, NJ
Posts: 385
bear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to beholdbear24rw is a splendid one to behold
Send a message via AIM to bear24rw
Re: pic: Twin Fan Powered Vex Prototype#2

Quote:
Originally Posted by Andrew Blair
Why not just have it track in a circle? Bind up one wheel a bit
Instead of binding a wheel why not just angle the front one?
Reply With Quote
  #20   Spotlight this post!  
Unread 06-07-2006, 01:37
Arkorobotics's Avatar
Arkorobotics Arkorobotics is offline
Robots!
AKA: Ara Kourchians
FRC #0589 (FalkØn)
Team Role: Mentor
 
Join Date: Nov 2005
Rookie Year: 2004
Location: La Crescenta, CA
Posts: 417
Arkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to behold
Send a message via AIM to Arkorobotics
Re: pic: Twin Fan Powered Vex Prototype#2

Quote:
Originally Posted by Andrew Blair
Or you could just grab a friend and put him 75 yards downrange.
ummm .. I did that to my friend and trying to catch a chunk of metal going 20MPH that has 2 fast fan blades is not a good idea. He actually slowed it down by kicking it a bit (not enought to damage it) and then jumped forward and used his hands to stop it. You can really get hurt trying to stop it.

It also now has a name now, it's called "Kamikaze". The reason is that if you don't stop it .. it will commit suicide. There are no brakes no controls and it's going 20MPH in a specific direction, so it's a Kamikaze... sorta.
__________________
2007 Rockwell Automation Innovation in Control Award winners (Southern California Regional)
Crescenta Valley High School Team 589
http://www.arkorobotics.com My Blag


3.141592653589793238462643383275902884197 <- Current memorization of Pi
Callsign: N6ARA
Reply With Quote
  #21   Spotlight this post!  
Unread 06-07-2006, 14:52
Nuttyman54's Avatar
Nuttyman54 Nuttyman54 is offline
Mentor, Tactician
AKA: Evan "Numbers" Morrison
FRC #5803 (Apex Robotics) and FRC #0971 (Spartan Robotics)
Team Role: Mentor
 
Join Date: Jan 2005
Rookie Year: 2005
Location: Seattle, WA/Mountain View, CA
Posts: 2,138
Nuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond reputeNuttyman54 has a reputation beyond repute
Send a message via AIM to Nuttyman54
Re: pic: Twin Fan Powered Vex Prototype#2

you could make it like a control-line plane and just tie a string/cable to it
__________________
Reply With Quote
  #22   Spotlight this post!  
Unread 07-07-2006, 23:41
sanddrag sanddrag is offline
On to my 16th year in FRC
FRC #0696 (Circuit Breakers)
Team Role: Teacher
 
Join Date: Jul 2002
Rookie Year: 2002
Location: Glendale, CA
Posts: 8,515
sanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond reputesanddrag has a reputation beyond repute
Re: pic: Twin Fan Powered Vex Prototype#2

I just drove my RC car with the same speed control and there is something like a 1 second delay before you can go into reverse. And just like you said, there is less power in reverse. Make sure you calibrate it though if you haven't already. There's a chance you may get slightly increased performance.
__________________
Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
Reply With Quote
  #23   Spotlight this post!  
Unread 08-07-2006, 13:29
amos229's Avatar
amos229 amos229 is offline
Retired chicken man
AKA: amouse
FRC #0229 (Division By Zero)
Team Role: Alumni
 
Join Date: Jan 2005
Rookie Year: 2003
Location: my mind, its dark in here
Posts: 219
amos229 has much to be proud ofamos229 has much to be proud ofamos229 has much to be proud ofamos229 has much to be proud ofamos229 has much to be proud ofamos229 has much to be proud ofamos229 has much to be proud ofamos229 has much to be proud ofamos229 has much to be proud of
Send a message via AIM to amos229 Send a message via Yahoo to amos229
Re: pic: Twin Fan Powered Vex Prototype#2

i would position a servo on each wheel and then just rub one wheel or the other with a bar connected to a servo. hit both wheels to stop.
__________________
Govenors see innovation like judges see pornograpghy, they dont know exactly what it is but they know it when they see it, Dean Kamen, BAE Regional, 2007

229 alumni= lifetime of inspiration
Reply With Quote
  #24   Spotlight this post!  
Unread 09-07-2006, 17:28
gblake's Avatar
gblake gblake is offline
6th Gear Developer; Mentor
AKA: Blake Ross
no team (6th Gear)
Team Role: Mentor
 
Join Date: May 2006
Rookie Year: 2006
Location: Virginia
Posts: 1,939
gblake has a reputation beyond reputegblake has a reputation beyond reputegblake has a reputation beyond reputegblake has a reputation beyond reputegblake has a reputation beyond reputegblake has a reputation beyond reputegblake has a reputation beyond reputegblake has a reputation beyond reputegblake has a reputation beyond reputegblake has a reputation beyond reputegblake has a reputation beyond repute
Re: pic: Twin Fan Powered Vex Prototype#2

Quote:
Originally Posted by amos229
i would position a servo on each wheel and then just rub one wheel or the other with a bar connected to a servo. hit both wheels to stop.
Steering & Braking Options (some already discussed)
  • Two Hooks, one on each side. A servo on each can drag the on the ground to steer. Put both down to slow down or stop like a carrier landing.
  • Two bars, one on each side. A servo on each bar can drag that bar on a rear wheel to slow that wheel.
  • Get control over the fan speeds.
  • Mount the fans on rotating platforms aimed by geared servos. Point the fans toward opposite sides to stop. Point them at the same off-axis point to steer.
  • Stop (once) by deploying a parachute that is attached to the car and catches all the wind from the fans.
  • Turn (and slow/stop) by dropping raising baffle plates behind the fans. To stop have the plates block all thrust coming out of the fans (leave a gap between the plates and the fan.
  • Turn by putting a rudder (on the nose or) aft of the fans. Aft is better.
  • Stop by lifting the nose wheel and letting a nose mounted skid plate create enough friction to slow you to a crawl.
  • Turn by making an "active" chassis that uses a servo to slightly alter the rear wheel alignments and makes the robot turn.
  • Stop by running into a pillowcase or net (or high grass).
  • Stop by running your power through a switch that only remains closed if you have a command from your remote telling a servo to keep it closed. Good for safety...
[edit]
  • My wife Jodie came up with this one - Raise and lower air-dams (sort-of like the ailerons on a wing) to create enough drag to turn it, instead of using a rudder.
  • Instead of popping a chute; for a one-time stop, you could drop a grappling hook or anchor.

I still like the idea of plates that open/close over the back of the fans to let thrust out and/or point it. It will have sort-of a jet engine look to it; can be controlled by chains and sprockets from the middle of the machine; and if the default is to block the thrust, they will give you both a smoothly controlled start-up and a failsafe mode (I think you can rig this using just the default code).
[/edit]

Also - Put some shielding (strong screening won't hurt airflow but will keep fingers and other debris out) on the front and back of those fans, and some padding on the leading edges of this missile. Do it before someone gets hurt....

Blake
__________________
Blake Ross, For emailing me, in the verizon.net domain, I am blake
VRC Team Mentor, FTC volunteer, 5th Gear Developer, Husband, Father, Triangle Fraternity Alumnus (ky 76), U Ky BSEE, Tau Beta Pi, Eta Kappa Nu, Kentucky Colonel
Words/phrases I avoid: basis, mitigate, leveraging, transitioning, impact (instead of affect/effect), facilitate, programmatic, problematic, issue (instead of problem), latency (instead of delay), dependency (instead of prerequisite), connectivity, usage & utilize (instead of use), downed, functionality, functional, power on, descore, alumni (instead of alumnus/alumna), the enterprise, methodology, nomenclature, form factor (instead of size or shape), competency, modality, provided(with), provision(ing), irregardless/irrespective, signage, colorized, pulsating, ideate

Last edited by gblake : 09-07-2006 at 18:51. Reason: New idea
Reply With Quote
  #25   Spotlight this post!  
Unread 09-07-2006, 17:59
Arkorobotics's Avatar
Arkorobotics Arkorobotics is offline
Robots!
AKA: Ara Kourchians
FRC #0589 (FalkØn)
Team Role: Mentor
 
Join Date: Nov 2005
Rookie Year: 2004
Location: La Crescenta, CA
Posts: 417
Arkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to beholdArkorobotics is a splendid one to behold
Send a message via AIM to Arkorobotics
Re: pic: Twin Fan Powered Vex Prototype#2

Quote:
Originally Posted by 1885.Blake
Steering & Braking Options (some already discussed)
  • Two Hooks, one on each side. A servo on each can drag the on the ground to steer. Put both down to slow down or stop like a carrier landing.

Also - Put some shielding (strong screening won't hurt airflow but will keep fingers and other debris out) on the front and back of those fans, and some padding on the leading edges of this missile. Do it before someone gets hurt....

Blake
The two hook idea is excellent I think I will try that, it is cheap and easy to make. Plus I just want to experiment around, I want to see if it works. So thank you.

And yes.. I did put a cover over the fans that don't effect the intake, and still give out the same power.
__________________
2007 Rockwell Automation Innovation in Control Award winners (Southern California Regional)
Crescenta Valley High School Team 589
http://www.arkorobotics.com My Blag


3.141592653589793238462643383275902884197 <- Current memorization of Pi
Callsign: N6ARA
Reply With Quote
Reply


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
pic: Vex fan powered :D Arkorobotics Extra Discussion 9 03-07-2006 18:28
pic: Evil's twin - The Enforcer aka BINGO! Bharat Nain Robot Showcase 25 01-03-2006 00:01
pic: 1251 Prototype v 1.2 David Guzman Extra Discussion 28 16-01-2006 12:14
pic: Prototype robot cire Robot Showcase 3 13-04-2005 21:26
Twin Rovers going to Mars...hmmm archiver 2001 2 24-06-2002 00:51


All times are GMT -5. The time now is 04:15.

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