We’ve confused ourselves regarding the idea of a raised bumper segment. Does the bumper configuration below violate the vertical cross section requirements, or other requirements? Do we need “slope up” to the raised section instead of something like the configuration below?
I believe you do need to “slope up” due to the aforementioned vertical cross-section rule.
edit: after looking at the rules again, I think you’re good, at any given point your bumpers meet the cross-section requirement, except in the vertical gap, but ruling that illegal would also make any sort of multi-piece bumpers illegal. Sorry for misinforming
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What rule is “vertical cross section”?
R408 “*BUMPER construction. BUMPERS must be constructed as follows, such that the cross section resembles Figure 8-6:”
Looks fine to me. I would recommend the raised section to be it’s own bit of bumper for easy of construction.
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You’re good as long as the noodles are cut to the same profile as the bumper wood, preserving the cross section all the way along the bumper.
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You are also allowed to have a <= 1/2" gap between bumper segments, so there is no need for a segment at a different height to even connect, they can just butt up to each other.
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Perfectly legal. You might find it easier to just make the entire side higher, rather than having 3 different sections of bumpers on that side - but that’s purely personal choice!
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That’s what I was thinking, but I don’t see anything in this design that would make that impossible to comply with.
Just make sure that your raised section is still within the bumper zone, as in not too high that it exceeds the height limit.
Assuming that’s to scale, it can’t be legal. Bumpers need to be ~5" tall. They also must fit in the bumper zone (R402 defines this as the ground to 7.5"). If those are both 5" and the raised segment is above the halfway point of the lowered, you’re already exceeding the 7.5" even if the lower portion is dragging on the ground.
Though, R402 seems to be the biggest limitation you’d run into. Given you’ll have something less exagerrated to meet that requirement, it doesn’t seem like you’d run into any issues elsewhere.
From there, you’re likely to find some use in:
FIRST FRC Q&A System (this one especially)
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Your bumper idea is 100% legal as long as it doesn’t exceed the bumper hight limit of 7.5" ,but make sure that the raised part of the bumper is its own piece. Team 1997 is doing the same thing
Yeah, thanks - it’s not to scale, just a quick scribble to convey the idea.
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Looks good to me, assuming the vertical offset is exaggerated. Each segment must be at least 4.5" tall, and all fit under 7.5", of course.
Q155 seems to directly answer your question, in particular (from the answer):
The measurement for a discontinuous segment would be made independently on each section of the backing.
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Assuming that the raised portion is a separate segment of wood, make sure you comply with the relevant part of R410:
To be considered supported, a minimum of ½ in. (~13 mm) at each end of each
BUMPER wood segment must be backed by the FRAME PERIMETER (≤¼ in. gap, ~6mm).
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