I have a feeling the everyone is going to underestimate the trailer. Everyone to a different degree but i believe that everyone will. This severely limits the ability to backup. And it makes an easy pinning target.
Dean and Woody never went backwards with their robots, most likely not to throw their hand to a major complication to our robots.
Avoiding a jack knife will be a major strategy, as will pinning a robot by the trailer as you are less likely to slip off and you can keep your goal close to the center of the crater.
My Thought: Teams that don’t build trailers to practice with will be surprised at completion by these Tricky Trailers. And only the quickest adapting of these teams will be successful.
I’m thinking of taking the drives out to the farm and putting them in one of these freezing rain puddles with a tractor and trailer, and see who can handle it.
I agree that it will hurt your manuevering, but I really don’t think jack knife will be a problem. Think about it. The wheels on it are the same as are on the robot. It’ll slide easy. I say jack knife it. You’ll just push it backwards and sideways. Don’t worry about backing it up staight or anything.
I think that will be underestimated now but once teams have finished drive trains and once they build a trailer they’ll get used to it. So i say in about 10 days we will see threads like, “Driving Is Impossible!”. Hopefully not.
But you are pushing the wheels the way they don’t want to roll, I heard somewhere on CD that the transverse friction is twice that of the normal forward travel friction. There probably not enough friction to catch the ground to cause the trailer to flip but you will be fighting it the entire way.
You the kind of person i’m talking about, that is going to underestimate the potential problems.
I know that we are building a trailer tonight and the next coupe of days so we can test it to foresee possible problems.
really good point, tomorrow i am starting to build our trailer, and hopefully we can have it up and on last years robot or something that way we can see how driving is…
I don’t think so. The contact is to be bumper-bumper instead of bumper-tongue (<R18>E) and the hitch is to be on the outside edge of the robot (<R18>D) and the the trailer must be easily removed after the match by removing its pin (<G36> and <R18>C).
It’s possible, but it’ll be pretty hard. You also have <R08> to consider, which includes the bumper perimeter.
I bet it’d be hard, but I’m pretty sure it’s possible. You don’t need a square chassis, all you need is a way to construct your back end in such a way that the sides of the hexagon abut the back end of your bot while the trailer tongue is pulled pretty far in while also observing the other rules about attaching easily and not hitting the walls before bumpers.
Bumper perimeter is defined as the outermost polygon in the bumper zone. However, you only need 2/3 of it. I’m sure you could come up with something like that.
It’s definitely possible. I think if you have your normal chassis but at the back, you leave some sort of indent that pulls the tongue in so that the trailers bumpers will rest on your bots bumpers. It’s not that hard, Petey, is it?
We had been thinking about butting up to the trailer to, but now that out of the question with the update, but what about a way to make your wheels point the same as the trailers? HMMMM…Ideating
Just remember that the hitch has to be on the bumper perimeter. Even if you put an indentation, the outer vertices would still define a polygon which would put your hitch not on the bumper perimeter.
Also, to EricH, you only need bumpers on 2/3 of the bumper perimetier. The entire bumper perimeter exists whether on not there are bumpers on the robot.
My team made a basic tank drive chasis from VeX kits, hooked up a trailer (also made of VeX) and drove it on a smooth table (the wheels being gears) and while it did seem to jacknife(?) quite a bit it didn’t seem to matter too much since the wheels also slid fairly easily.
of course, it’s just VeX on a smooth table, and it may be entirely different in competition