Different DR4B

While going through some vex sky rise videos trying to get ideas for this years game, I noticed that the dr4b is 4 main variants and I was wondering what are some significant pros and cons of each design. As I only joined edr in nbn I am not year familiarized with the components of the “DR4B” and from what I have seen so far it is going to be implemented into this years meta. Such differences include 1. both sections of the lift are 4 bar designs, 2. both sections are 6 bar designs, 3. the bottom lift is 4 bar and the top lift is 6 bar, 4. the bottom lift is 6 bar and the top life is 4 bar. obviously there are other variants such as adding pneumatics double or single action, gear ratios, rubber band placements etc… but this seems like the only main difference that could actually change stuff drastically to your lift weather that be speed or strength. And from that which configuration do you think will make the lift the fastest since strength of the lift wont be much of a problem unless your picking up the mobile goal with it.

Here are my pros and cons listed out:

  1. This would probably be the best since it can go high and yet still be light. You only need two bars for the bottom 4 bar, and two bars to make the top 4 bar (any other bars that are added are for keeping the intake or any other component on the lift). This makes it so much lighter than any of the other lifts. You might say that the cones are so light, it doesn’t really matter about how heavy the lift is. But remember, your base/chassis is driving the lift around. If it’s too heavy than your base can become slow.

  2. This lift out of the 4 is the one that can go the highest. It’s two 6 bars for crying out loud. But 6 bars do need a lot of bars. This adds weight and can make it so heavy that even the lift can’t lift itself. It could be so heavy, you might need to gear your base for torque (not really, but if you have a lot of things on the lift like an intake, it could really add the weight).

  3. and 4) These lifts are really just for achieving a certain height. Maybe the creator wanted to go a few more inches higher, so they add the 6 bar on the top instead of another 4 bar. Maybe the creator saw the lift go way too high and wanted to shave off a few inches, so they add a 4 bar on the top instead of another 6 bar. There weight is in between a double reverse 4 bar and a double reverse 6 bar. These lifts are just if you wanted to go a little higher or a little lower.

So I hope this helps you. And if anyone would like correct me, then go ahead. I always like to here the other side of the story.

In comparison to the above, one of the things about using a 4 bar or a 6 bar on an rd4b is linearity. Two 4 bars will definitely be linear. As soon as you add a 6 bar, it stops being linear. (By linearity, I mean how straight it lifts).

Also, a six bar on the bottom or top generally changes mounting. It creates space in half of the lower space of the robot due to the fact that there is some extra space, and it also is easier in some cases to have. For example, people often used a 6 bar on top in skyrise because it 1. provided a better, more secure mounting of the intake, and 2. it had a better angle against the skyrise sections to drop cubes on.

Four bars and six bars have the same horizontal displacement, so a dr4-6b and dr4b are both linear lifts, as long as the long horizontal bar of the six bar is the same length as the horizontal bars of the four bar.