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Air Knight K4 11 Friction, known as Air Knight 11 Friction (エアナイト・イレブン・フリクション, Ea Naito Irebun Furikushon) in Japan, is a Defense Type Beyblade released as part of the Burst System as well as the Cho-Z Layer System. It was released in Japan on December 27th, 2018 for 993円 as one of eight possible Beyblades in Random Booster Vol. 13 Air Knight.12E.Et.
Energy Layer - Air Knight K4
Main article: Energy Layer - Air Knight K4
Forge Disc - 11
Main article: Forge Disc - 11
11, unlike most other odd numbered Core Discs, is symmetrical and elliptical in shape in order to facilitate a Frame. Each side features one large protrusion to create the visage of an "11" with one protrusion featuring a large "1" shaped indent to create an unbalanced design, however the shallow depth of the indent creates no noticeable effect. Compared to other Core Discs, 11 is one of the lightest, even lighter than most non-Core Discs. This light weight severely hinders 11's Attack, Defense and Stamina potential and while the light weight would create high Burst resistance, the heavy weight of the SwitchStrike/God Layer System and the Cho-Z Layer System makes the use of lightweight Discs for Burst resistance obsolete.
Performance Tip - Friction
Main article: Performance Tip - Friction
Friction features a wide ball shaped tip that sits at the standard height composed of PolyOxyMethylene (POM) thermoplastic, akin to a combination of Massive and Yielding, surrounded by a ring of rubber, akin to Atomic's free-spinning ring. In theory, the wider tip would increase a Beyblade's Defense by having greater surface area and friction, however in practice, Friction's low friction POM construction reduces much of the KO resistance given by the surface area of the ball. Like the tabs of other ball based Performance Tips for Defense, Friction's rubber ring is meant to act as brakes against KOs at the cost of Stamina by striking against the stadium floor, however, the rubber is situated so high up that it is incapable of reaching the stadium floor at all.
While these features may imply that a Friction combination would be easy to KO, in reality the heavy weight of Cho-Z and SwitchStrike/God Layers and many Core Discs compensates for the POM construction and the static ball creates greater friction than a free-spinning ball, giving Friction greater KO resistance than Atomic or Orbit. Furthermore, the low friction increases the Burst resistance of Friction-based Combinations. However, Friction performs poorly in Spin Equalization and Opposite-Spin Combinations as the Tip is very easily destabilized.