JVN posted why they called it butterfly here.
Are you implying we’re not our own country?
I make no comment as to the statehood or lack thereof of Texas. 
On our 6w tank we have used 1/16" drop center the past 2 years.
That is, the center wheel is 1/16" below the line you draw between the two outer axles, so at any one time, one wheel is 1/8" off the ground. The low drop makes the robot much less wobblier and has no negative effect. We are happy.
I’m 1625’s base driver, and were running a 6 CIM drive with a 16fps free speed (so about 14fps friction speed). Single speed no fancy shifters or anything d: we have 2 DT vex pro 4 inch wheels on the back and 2 Vex pro omnis on the front. I drove a butterfly drive and had a lot of fun doing fancy spins and learned how to control the squirlyness of the drive which helped this year. It helps to get around defense very easily. Thank you everybody for the words of encouragement (: if any more questions pop up feel free to message me!
Don’t go changing drivetrain names because of us. :] Butterfly will always have drop down omnis to me.
My signature has been the same for a number of years. I’ve been calling our drivetrain this year “4 Omni Wheels” which I think has a certain honest ring to it.
If I had to change it though, it would be “Greased Pig Drive” which is what our team compared it to throughout the season. You can push it around but you can’t pin it down.
Cheers, Bryan
I’ve played a lot of defense and I never thought an all 4 omni drive would be so hard to stay on! You guys really made finals on Archimedes interesting:rolleyes: kudos for driving it like you stole it!
I’m a junior as well as our AUX driver and our human player is a sophomore so well be together next year as well!
Is there any historical data for this subject (Einstein Drivetrains)? I’d be interested to see how many non-tank style drives have made it to Einstein in the past.
+1. I would like to know this as well.
1678 ran with a 0.090 drop center and 6 cim WCD with high gear of 22fps(20 attainable) and 8 fps low gear.
I really think that “butterfly” is a better name for these actuating drives. It gives a better idea of the characteristics of the drive in that it suggests quick fluttering movement. I know the original reason for naming it “butterfly” has nothing to do with that, but it works regardless.
In addition to that, “Tex Coast” makes it sound like some kind of variation on West Coast which it most certainly isn’t. KOP drop center and WCD are similar in comparison to actuating drives and it follows that actuating drives should have a distinct name. Honestly I think that an actuating drive with Mechanums should also be under the class of “Butterfly” simply for nominal organization purposes. It is very convenient and efficient to refer to all actuating drives with one name and then further qualify them with what kind of wheels are in there. “Octocanum” is incredibly misleading.
Sorry to derail the thread, all these different names makes it very difficult for someone curious about different designs to actually learn about them.
As best as I can recall
Swerve drives on Einstein:
16 (2008, 2012)
67 (2005)
71 (2007)
111 (2003, 2009)
148 (2008)
1625 (2010)
1640 (2013, 2014)
2481 (2014)
File-card drive on Einstein:
71 (2002)
Drivetrains with drop-down wheel sets (“slide,” “butterfly,” etc.)
51 (2011)
148 (2013)
175?? (They have used these in the past, not sure if they did between 2003-2005)
Skid steer (tank) drives on Einstein:
Everyone else
Why can’t people just let Texas do its own thing…
My personal Favorite -
What is file card drive?
Ahh yes I remember hearing about that. Great idea.
Here’s a list of championships winners’ drivetrains from the beginning of time. (Taken mostly from this thread, in particular Jared Russell’s post http://www.chiefdelphi.com/forums/showthread.php?t=77412 )
I’m on my way to lunch and I don’t particularly have time to fill in 2012 through 2014 (and I don’t know some of the newer ones since I haven’t really been on a team in a few years), but I’m sure it can be done quickly by the people in the CD community. Please also correct any inaccuracies.
2014
254 -
469 -
2848 -
74 -
2013
1477 -
619 -
1241 -
2012
16 -
180 -
25 -
2011
254 - 6 WD long
111 - 6 WD long
973 -6 WD long
2010
67 – 8 WD long
177 – 8 WD long (articulated is sets of two, front and back)
294 - 6WD long
2009
67 - 6WD wide
111 - 4 wheel crab (non-coaxial), wide
971 - 6WD wide
2008
1114 - 6WD long
217 - 6WD long
148 - three-wheeled crab (coaxial), nonagon-shaped robot
2007
177 - 6WD long
987 - 6WD long
190 - 6WD long
2006
217 - 6WD long
522 - Treads, long
296 - 2WD long, Omnis in front
2005
67 - three-wheeled crab (non-coaxial). Flop bot.
330 - 6WD long
503 – 4WD long, omniwheels in rear
2004
71 - 4WD long
494 - 4WD long
435 - 2WD long, with casters in front
2003
111 - Four-wheeled non-coaxial crab (with dropdown skid for turning)
469 – 4WD Long
65 - 4WD Wide
2002
71 - 4WD flop bot with casters in front
173 - 4WD long
66 – 4WD long
2001
71 - ?
294 - ?
125 - ?
365 - ?
279 - ?
2000
255 - ?
232 - ?
25 - ?
1999
176 - 4WD long w/ Omnis in front
1 - tank treads, long
48 – 4WD, long
1998
45 – 4WD long with Omnis in front.
1997
71 - ?
1996
73 - ?
1995
100 - ?
1994
144 - ?
1993
148 - ?
1992
126 - ?
That’s not even remotely representative of how they actually used that drivetrain in competition. The factor that set it apart was the file cards on the “front” of the flop bot, that they used to “walk” downfield (once they acquired the goals) to give them incredible traction and pushing power, at the expense of the ability to steer their robot.