View Single Post
  #10   Spotlight this post!  
Unread 15-08-2005, 16:44
Unsung FIRST Hero
JVN JVN is offline
@JohnVNeun
AKA: John Vielkind-Neun
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 2000
Location: Greenville, Tx
Posts: 3,159
JVN has a reputation beyond reputeJVN has a reputation beyond reputeJVN has a reputation beyond reputeJVN has a reputation beyond reputeJVN has a reputation beyond reputeJVN has a reputation beyond reputeJVN has a reputation beyond reputeJVN has a reputation beyond reputeJVN has a reputation beyond reputeJVN has a reputation beyond reputeJVN has a reputation beyond repute
Re: pic: 2 speed dogshifter

See attached spreadsheet.

I used the numbers Arefin gave, and just plugged them in quick for some speed estimates. Using a 4" dia wheel, with a 24 tooth sprocket (the 229-2005 layout - fairly average final gearing) I have this guy moving at ~13 fps & ~3 fps

You can plug in similar numbers, and see what you come up with.
Ary is dead on.
Attached Files
File Type: xls Arefin-Shifter-81505.xls (44.5 KB, 140 views)
__________________
In the interest of full disclosure: I work for VEX Robotics a subsidiary of Innovation First International (IFI) Crown Supplier & Proud Supporter of FIRST
Reply With Quote