# How to design a rampbot

I am a rookie and my team was thinking of designing a ramp bot. However at a 15 degree slope then each ramp would be 7 feet long. I was going with 15 since that is the angle of the ramp up to the platform and I know that robots can get on it. However, this would be incredibly heavy due to the length. I was wondering if anybody knows what the highest slope that almost all robots can drive up. In 2007 there were robots seeming to go up 45 degree slopes, but I do not want to rely on that height.

Id check your math again. 7ft doesn’t seem right to me…Im getting something closer to 45 inches of horizontal… 12/tan(15)…

In 2007 a lot of teams built their robots while keeping in mind having to drive up other peoples ramps. This year, the story may be different. While trying to make ramps this year, our team realized that the packaging for ramps for two robots that are max size was gong to be difficult. Instead, we are attempting to make a flat platform that drops down over the bumpers and lifts the other robot while we climb like a forklift. This way, the system is light, simple, and allows us more room for our arm.

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Keep in mind that no matter how big you make your ramp, it needs to be entirely supported by the Scale. With a 7 foot long structure, any flex in your materials will likely bend down and touch the carpet… Just a thought.

Also, as a rookie take the best advice I ever got:

1. RTFM
2. You know that clever thing? Don’t do that. It’s ok to take risks if you think everything through, but if your CAD looks like an Inspector Gadget cartoon, its time to slow down…

No. No one knows the highest slope that almost all robots can drive up.

However:
Most robots will be designed to drive on carpet.
Some robots will have a long drive base, some robots will have a wide drive base.
Some robots won’t be able to drive up even the ramps on the field.
Some robots will be fully loaded (120 lbs + battery + bumpers + game piece).

Hope this helps.

So your robot will be climbing from the rung and lifting them with? Or will have forklift mechanisms on each side to lift them while you stay on the platform?

The way it seems, everybody and their brother will have a Ramp Bot this year… I highly recommend, being that you’re a rookie team, to ask yourself if you can still have an effective Switch manipulator if you have Ramp Bot capabilities. If the answer is yes, awesome! If the answer is no, or you think your Switch capabilities will be reduced/diminished, then I would say to focus on building a robot that can successfully accomplish scoring in the Switch at a high level.

Regardless of the above answer, I would suggest that you build a robot that is capable of driving onto a Ramp Bot. Tippy robot is bad. Low clearance robot is bad.

No, slope would depend on many factors, some are weight, wheel choice, and center of gravity.

Would it be a better idea to use a forklift and then gear the drivetrain motors so that they disengage and raise two robots, one on either side?

Not every robot will use the same number / size wheels. Some robots will have 4 wheels, some will have 6, some will have 8. There may be a robot or two with more than that, or less!

Some robots will be wide, some will be long. Some robots will have lots of ground clearance. Some robots won’t have much ground clearance at all.

Some robots may have frame cutouts that you won’t be able to lift.

There are pros and cons to every design choice. Keep thinking about it!

EDIT:
Here’s some inspiration for you. Maybe do a combination, like Team 1501 from 2007.