Ramp Angle Survey

[GaryVoshol]

Originally Posted by DjAlamose

... 13 because I want to make sure that we get that 30 and not 15 for being 11.8" above the ground, and 45 because it gives a 3" ground clearance.

What about bumper clearance?

[DjAlamose]

Originally Posted by GaryV1188

What about bumper clearance?

Rule R37 comes into play.

STANDARD BUMPERS must remain within the BUMPER ZONE when the ROBOT is resting on the floor in PLAYING CONFIGURATION. They can not be articulated or moved outside of the BUMPER ZONE. The one exception to this is STANDARD BUMPERS may be within or below the BUMPER ZONE during the END GAME if the ROBOT is in its HOME ZONE (see Figure 8-3).

So durring end game, they just fold down and out of the way.

[Assassin Shadow]

Forgive me if I'm wrong, but does it really matter whether the robot is up past the ramp. It doesn't have to be past the corner at the top of the ramp to earn points, it just has to be at least 4 inches up the ramp. So in a worst case scenario, just make it so that your robot can make it that far up a ramp and then turn a little sideways so that they don't roll back down. Viola!

[KTorak]

Originally Posted by Assassin Shadow

Forgive me if I'm wrong, but does it really matter whether the robot is up past the ramp. It doesn't have to be past the corner at the top of the ramp to earn points, it just has to be at least 4 inches up the ramp. So in a worst case scenario, just make it so that your robot can make it that far up a ramp and then turn a little sideways so that they don't roll back down. Viola!

However, as seen last year, your robot must be able to sustain its final position for up to 30 seconds or more while scoring takes place. Therefore, if you are not over the apex of the ramp, you will fall off and you most likely will not receive the points. But, this is probably Q&A material.

[DonRotolo]

Originally Posted by Assassin Shadow

Forgive me if I'm wrong, but does it really matter whether the robot is up past the ramp. It doesn't have to be past the corner at the top of the ramp to earn points, it just has to be at least 4 inches up the ramp. So in a worst case scenario, just make it so that your robot can make it that far up a ramp and then turn a little sideways so that they don't roll back down. Viola!

4" up the ramp is NOT the same as 4" from the floor.
Many robots will roll when powered down. You'd have to turn sideways to be sure you don't roll. Do you want another robot turning atop yours? I don't


We are thinking of an 8" tall robot with a 36" long ramp, Sin (8/36) = ~13 degrees.

Don

[Bongle]

Originally Posted by Don Rotolo

Do you want another robot turning atop yours? I don't

That's really a moot point. From driving previous robots, I've noticed that motor stall and joystick sensitivity at low speeds is a BIG issue. Since I imagine you don't want robots climbing at high speeds, then you're going to be dealing with robots turning on your robot no matter what.

I think it a plausible sequence would be like this:
-Team is driving very slowly up skinny ramp
-Team stops to make sure orientation is good
-Team attempts to continue at low speeds, but one side un-stalls first, causing the robot to rotate. They now either have to deliberately rotate, drive off and try again, or just give up and hope they reached 4".

Which makes me realize that painted-on markings for vertical displacement of 4" and 12" on any given ramp would be a very good idea. Also, having your ramp removeable between matches would be good. Who wants a 4ft ramp above their heads if they know before their match that they'll be climbing an partner's ramp?

Keep in mind that all those holes will reduce the structural strength as well. I'm sure nobody wants to see their robot fall through a ramp...

Your ramp certainly doesn't have to be a flat piece of metal. You could probably get away with a honeycomb-like bit of metal supported by some posts, with thin carpet on top.

[Jeremiah H]

I like the info posted here, it will be very helpful to us, as we are designing a rampable bot, hopefully capable of holding two others.
Here's an idea for you all to consider- what if, instead of a flat ramp, you had a curved (or maybe even parabolic-less trouble with that leading bumper edge) ramp. l believe that this could potentially allow a shorter (in length) ramp to accommodate a longer/less ground clearance wheelbase, especially if said ramp was parabolic rather than a perfect circular curve.
Just a thought. Let me know what you think.

[SSMike]

Hopefully 10- 15 degrees. This is half the angle that last year's ramp was so it might be easier to get up