Statistics on top 20 teams?

[slavik262]

Originally Posted by gvarndell

This is a too simplistic view of the issue.
Yes, there is some weight associated context switching.
But if a single thread polls for some event for even 3 milliseconds, that wasted time is nowhere near recovered by avoiding context switches.

You didn't account for the rest of my post. As I said, depending on what you do with those threads affects performance. Obviously you'd want a separate thread if you're blocking for some input. Besides, that wasn't the overall point of my post.

[Chris is me]

I don't know if this is a Top 20 statistic or not, but there was not a single mecanum drive robot on Einstein this year. I won $10 when that happened.

I bet you'll find that almost all of them used roughtop or wedgetop tread in their robot, at least 4 CIMs (I don't think any of the 6 motor teams made the top 20), and they had good possession.

I also think though, that you need to figure out what is causation and what's simple correlation.

[Tom Bottiglieri]

Originally Posted by Chris is me

I don't know if this is a Top 20 statistic or not, but there was not a single mecanum drive robot on Einstein this year. I won $10 when that happened.

I bet you'll find that almost all of them used roughtop or wedgetop tread in their robot, at least 4 CIMs (I don't think any of the 6 motor teams made the top 20), and they had good possession.

I also think though, that you need to figure out what is causation and what's simple correlation.

Teams with mecanum drive were almost automatically put on our "Do Not Pick" list.

[JamesBrown]

Originally Posted by Chris is me

I don't know if this is a Top 20 statistic or not, but there was not a single mecanum drive robot on Einstein this year. I won $10 when that happened.

I think it has been proven over and over again that a well designed 6/8 wheel drive train is as fast and maneuverable as mecanum. It surprises me every year that more and more teams seem to be going with mecanum designs. Mecanum wheels make for a cool demo bot (especially if you can translate and rotate simultaneously) but we are yet to see a game where they offer a real advantage (I do think they could have been a good option in this years vex game).

[Chris is me]

Fun Fact: Just looking back through 2005 (before that "no one" had mecanum), there has never, ever, ever been a mecanum drive robot on Einstein. I hope teams that consider mecanum in future years ask themselves why they think this is.

[Peter Matteson]

Originally Posted by Chris is me

Fun Fact: Just looking back through 2005 (before that "no one" had mecanum), there has never, ever, ever been a mecanum drive robot on Einstein. I hope teams that consider mecanum in future years ask themselves why they think this is.

We said the same thing about wide bodies and Einstein in 2009 and 11 out of 12 robots were widebody that year.

Just because the game where mechanum makes sense hasn't happened yet doesn't mean there will never be one. It's a simple design trade that you can do when determining your team's strategy. Just because you can make something does't mean you should if you look at the big picture.

[Chris is me]

Originally Posted by Peter Matteson

We said the same thing about wide bodies and Einstein in 2009 and 11 out of 12 robots were widebody that year.

Just because the game where mechanum makes sense hasn't happened yet doesn't mean there will never be one. It's a simple design trade that you can do when determining your team's strategy. Just because you can make something does't mean you should if you look at the big picture.

I didn't mean to imply "never will there be one" or "mecanum is always bad". I just think when teams make such a decision, they should ask themselves why this year will be different than previous years.

[Peter Matteson]

Originally Posted by Chris is me

I didn't mean to imply "never will there be one" or "mecanum is always bad". I just think when teams make such a decision, they should ask themselves why this year will be different than previous years.

That was my point as well.

[thefro526]

Originally Posted by Chris is me

Fun Fact: Just looking back through 2005 (before that "no one" had mecanum), there has never, ever, ever been a mecanum drive robot on Einstein. I hope teams that consider mecanum in future years ask themselves why they think this is.

Oh, and my favorite Fun-Fact: There has only been one 6WD Swerve Drive in the history of FIRST... And it went to Einstein.

Also, there have been a quite a few flop bots on Einstein as well: 71 in 2002, 67 in 2004, 67 in 2005, and 16 in 2008. Looks like they've been spaced out an average of 2 years each... Does that mean we're overdue for a Flop bot to go to Einstein? Hopefully they're legal in 2011.

[Chris is me]

Originally Posted by thefro526

Oh, and my favorite Fun-Fact: There has only been one 6WD Swerve Drive in the history of FIRST... And it went to Einstein.

Also, there have been a quite a few flop bots on Einstein as well: 71 in 2002, 67 in 2005, and 16 in 2008. Funny thing is that they've been spaced out 3 years each... Maybe we'll see a flop bot on Einstein in 2011?

You forgot 67 in 2004, which kind of wrecks your pattern a little.

[thefro526]

Originally Posted by Chris is me

You forgot 67 in 2004, which kind of wrecks your pattern a little.

I edited my post to reflect this.

Hopefully the rules won't be overly restrictive and flop bots will be legal next year.

[TEE]

Originally Posted by thefro526

Oh, and my favorite Fun-Fact: There has only been one 6WD Swerve Drive in the history of FIRST... And it went to Einstein.

Which team and which year?

[NickE]

Originally Posted by TEE

Which team and which year?

1625 2010

[TEE]

Oh rly? How'd I miss that o_o ?

[kstl99]

Originally Posted by Chris is me

Fun Fact: Just looking back through 2005 (before that "no one" had mecanum), there has never, ever, ever been a mecanum drive robot on Einstein. I hope teams that consider mecanum in future years ask themselves why they think this is.

I am a mentor on Oz-Ram, 1922. At our first meetings after kickoff we decided our priorities would be speed, agility, and a good kicker. We used mecanum wheels and a wide orientation. We ended up being quick and very maneuverable. We were very good at getting to balls and clearing them into the front zone when we were in the middle or rear and could score well also. We could easily go over the bumps with a little momentum and go through the tunnel sideways. We were #1 seed at BAE, won in Boston and made the semi-finals in the Newton division. Sorry if I am bragging but my point is that with our strategy the mecanums were very much an asset.