# Quadriple Reverse 8 Bar lift(QR8B)

The double reverse 4 bar lift, and the quadruple reverse 8 bar lift.

It appears to be that you are referencing vertical height.
Saving vertical height is less useful than saving horizontal space, since you canāt really mount anything on top of the qr8b.
Again, a qr8b is not impossible, but is unnecessary, as a tower built that tall would be very unstable.
Its better off as recruiting material than something to be used in tournaments.

Ahem. I mean qr4b. I have been struck by the big dum

Have you seen any robots which had such a lift? And also because there are 4 axes of movement, there are 8 bars, double the amount on a DR4B

The terminology used in VEX lifts is not consistent with other uses in engineering.
Still, the term 4-bar in VEX usually refers to a left and right pair of parallel bars. A DR4B is basicially 2 4-bars sat on top of each other, with one reversed. People arenāt counting the towers on the robot or the mid-way towers in between the two 4-bars.
A QR8B on that basis would suggest four 8-bar lifts on top of each other, which would be enormous, 11 or 12 foot.

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Then would it be refered to as, a DR8B?

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we will say this lift has 4 quarters, each quarter is a singular 4 bar lift. wouldnāt it make it a quadruple (since it has 4 stages) 4 bar (since its stages are made up entirely of 4 bar lifts) lift?

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The first letter in the term (?)R(?)B is the amount of lifting bar sets there are in a lift. Since these are usually paired the best fitting words would be Double, Quadruple, Sextuple, Octuple and so on. The 3rd letter is the type of lifting bar set (4 bar, 6 bar, 8 bar, and even chain bar). The 2nd and 4th letters help describe what lift it is (R-reverse, B-bar)

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Yes.
This is a four bar:

This is a DR4B:

Because there are two four bars attached to each other (hence the word ādoubleā), and the top four bar is facing the opposite direction, (hence the word āreverseā)

A QR4B would be four (because of āQuadrupleā), four bars. Basically, two DR4Bs on top of each other.

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Thatās a very detailed explanation thanks for the information.

Yeah so we can agree that this would be called a Quadruple Reverse 4 Bar (QR4B) rather than something else?

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Sure. I agree.
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But, on that noteā¦ QR8Bā¦ someone with too much time on their hands please build one.

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if you made an 8 bar out of 35 hole long c channels, so maximum length, it would be somewhere around 36" tall. (this number was from me laying out c channel on my floor in an 8 bar shape and kind of estimating a bit, so its a very rough number)
if you had 4 of such 8 bars stacked on top of one another, thatās 144" tall. add maybe 12" for the lift towers on the base, and you have 156" tall. thatās 13 feet tall. Idk what the game manual says on the matter of breaking through venue ceilingsā¦

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