pic: Team 1687 Doherty Technical Forces - Chassis

[Paul T.]

loading photo ...

Yes its under 112"

[AllenGregoryIV]

What was the intent of the two inset back wheels?

[ehfeinberg]

Maybe I can't see from the picture, but what caused you to put your back wheels on the inside of your robot?

And how do you believe the drive train will react with not all the wheels co-linear?

[Jay O'Donnell]

Looks fantastic! I can't wait to see your full robot this year, you guys always have great designs. Good luck!

[Paul T.]

Originally Posted by AllenGregoryIV

I hate to be the person to ask but do you have 8" of bumpers on the two front outside vertices, it looks really small in the picture.

Also, what was the intent of the two inset back wheels?

the front two pieces are 8.5" and the back two tucked in wheels allows us to make our bumpers go like this

l l
\_/

it allows us to fit in the cylinder better.

[dodar]

Maybe I just cant visualize the bumpers but I dont see the point of having those back wheels inboard. That also looks like it will greatly affect the maneuverability of the robot.

[Paul T.]

Originally Posted by dodar

Maybe I just cant visualize the bumpers but I dont see the point of having those back wheels inboard. That also looks like it will greatly affect the maneuverability of the robot.

Yeah we thought it may, but were pretty certain that it will be ok.
were also using 4 CIMS and an andymark to power it so we have the power to make up for it

[EricH]

Originally Posted by dodar

Maybe I just cant visualize the bumpers but I dont see the point of having those back wheels inboard. That also looks like it will greatly affect the maneuverability of the robot.

You might ask 179 how having wheels offset in a similar pattern affected them a few years back. I think it was their 2005 robot that had 6 wheels in a diamond-ish pattern; it did fairly well.

It doesn't do much to affect maneuverability, not at that level, at least that I know about.

Visualizing the bumpers... It sounds like an interesting idea; I assume that bumper supports just aren't shown in this render. (Magic doesn't count as a support, sorry. Neither does simply constraining in CAD...)

[Paul T.]

Originally Posted by EricH

You might ask 179 how having wheels offset in a similar pattern affected them a few years back. I think it was their 2005 robot that had 6 wheels in a diamond-ish pattern; it did fairly well.

It doesn't do much to affect maneuverability, not at that level, at least that I know about.

Visualizing the bumpers... It sounds like an interesting idea; I assume that bumper supports just aren't shown in this render. (Magic doesn't count as a support, sorry. Neither does simply constraining in CAD...)

you only see the chassis in the picture, we are planning to use the full 20 lbs for bumpers to include almost all mounting in the bumpers.

[Paul T.]

Originally Posted by Jay Money 1058

Looks fantastic! I can't wait to see your full robot this year, you guys always have great designs. Good luck!

If you liked the savage soccer robot you will love this, without giving too much away, we have an "awesome bar" type mechanism

we finally got some really great companies to support us so we can reach our full potential (assuming we can get some hex bearings)

[dodar]

Originally Posted by EricH

You might ask 179 how having wheels offset in a similar pattern affected them a few years back. I think it was their 2005 robot that had 6 wheels in a diamond-ish pattern; it did fairly well.

It doesn't do much to affect maneuverability, not at that level, at least that I know about.

Visualizing the bumpers... It sounds like an interesting idea; I assume that bumper supports just aren't shown in this render. (Magic doesn't count as a support, sorry. Neither does simply constraining in CAD...)

I do believe 179 did it in 2008 as well. They had a pretty wicked turn rate. But it might have just been a 3-wheeler with the front wheel being a swerve module.

[Paul T.]

Originally Posted by dodar

I do believe 179 did it in 2008 as well. They had a pretty wicked turn rate. But it might have just been a 3-wheeler with the front wheel being a swerve module.

http://www.chiefdelphi.com/media/photos/21631

that's actually what inspired it.

[dodar]

Originally Posted by Paul T.

http://www.chiefdelphi.com/media/photos/21631

that's actually what inspired it.

Well that was their 2005 bot not 2008.

[Paul T.]

Originally Posted by dodar

Well that was their 2005 bot not 2008.

yeah sorry about that, just thought team 179 didn't really think about the year.

[Nuttyman54]

Originally Posted by dodar

Well that was their 2005 bot not 2008.

179 did this in 2005, 2007 (only the front pair) and 2008 (only the front pair).
234 also did it in 2007. All four robots were highly successful, I don't think the inset wheels will cause an issue for you.