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By Aaron Waldron
LiveRC.com
New from XRAY:
www.teamxray.com
XRAY X12 '18
2018 All-new Features
Chasis Concept
Whether you are racing at US very-high traction tracks or European medium-traction tracks, whether the track is carpet or asphalt, there is an X12 Edition that is specifically designed and suitable for your particular traction conditions.
The US Edition features a chassis and pod plate CNC-machined from 2.0mm Swiss 7075 T6 aluminum which is more suitable for high- and very-high traction tracks; it makes the car easier to drive, keeps more cornering speed, and prevents the car from traction rolling.
The EU Edition features a chassis and pod plate CNC-machined from custom-manufactured 2.5mm high-grade graphite material with a specially-designed compound for low, medium, and high-traction tracks. The graphite material is softer than an aluminum chassis and therefore generates more traction.
Chasis
The X12 chassis was completely redesigned and re-engineered. In order to prevent the chassis from touching the track surface at the front, the chassis was split into two pieces: the main chassis and an elevated graphite bumper holder. This new design shortens the chassis by 14mm and elevates the bumper holder above the track surface.
The new split chassis concept minimizes scrub at the front part of the chassis, allowing for increased steering and more consistent handling, particularly in high-traction conditions. The new design results in increased off-power steering.
Suspension Concept
To utilize the performance potential in various traction conditions, there are two different suspension concepts used on the 2018-spec X12.
The EU Edition includes a standard composite suspension that makes the car predictable and generates more traction.
The US Edition features an all-new unique graphite suspension arms that reduces torsional flex of the arms in the corners of very-high traction tracks, making the car more reactive and easier to drive
Suspension
The all-new XRAY self-designed graphite front suspension was specially designed for high-traction US-style tracks. With the stiffer front, the car has more cornering speed while being easier to drive and more consistent in high-traction conditions.
The graphite arm is mounted on aluminum posts which are mounted to the chassis. The holder for the composite front upper arm mount is mounted on the graphite arm as well.
The graphite front suspension was successfully used by the US team where Eric Anderson won the US National Championship title in Stock class with this new suspension concept.
Wheelbase
The X12 chassis features a new, innovative front wheelbase adjustment possibility. The chassis has two positions for front suspension mounting; the whole front suspension can be easily moved by 2mm frontwards or rearwards.
The long wheelbase is the same wheelbase as previous X12 cars, and is recommended for larger tracks or tracks with longer sweepers. A long wheelbase works well at low-to-medium traction tracks when more stability is desired. Also better suited to the Open Modified classes to make the car smoother and less twitchy.
The short wheelbase allows the car to rotate better in the middle of the corner to maintain cornering speed. Recommended for tight, technical tracks or tracks with numerous hairpin corners. The short wheelbase works well at medium-to-high traction tracks where a lot of steering is needed. Also better suited to the Stock and blinky classes.
Graphite Bumper Holder
All-new graphite bumper holder is designed to fit into the new shorter chassis and keep the front body posts at the same position as previous versions, but atop the chassis so it does not touch the racing surface. This improves the steering of the car and prevents front scrubbing.
Machined from premium 2.5mm graphite, the brace is flexible yet rigid enough to withstand serious crashes.
Foam Bumper
X12 now includes a foam bumper which improves the durability of the car and protects the front in hard collisions. Hand-cut from specially-developed foam material, the bumper is very light, yet very strong.
Servo Mount
The graphite plate posts and servo mount posts are 3mm shorter to allow the servo to sit lower to decrease the CG of the car.
When the inline chassis battery alignment is used, the included 3mm shims allow the plate posts & servo mounts to be raised so the battery can be placed below the graphite plate.
Battery Backstops
The chassis features new grooves to allow mounting of the battery backstops and adjustment of battery position when cross-chassis battery alignment is used.
To eliminate battery movement when inline battery alignment is used, the chassis features holes for composite battery backstops.
Shock Position
The all-new rear link pod upper plate includes extra holes for center shock mounting to allow fine tuning and greater range of shock adjustability.
By using a longer or shorter shock, the damping and steering characteristics can be changed. The new upper plate allow the shock to be moved front & back to alter how the car enters & exits corners.
Long Shock:
Short Shock:
Frontward positions:
Rearward positions:
Track-Width
The lower suspension arms feature smart eccentric aluminum inserts which allow quick & easy track-width changes depending on track conditions. Optional aluminum 0.5mm and 1.0mm eccentrics are used to set the track-width either narrower or wider.
Both EU and US Editions include specific track-width adjustment inserts.
Pivot Brace
All-new tweak-free lower pivot brace was redesigned for easier mounting of the pod plate on the chassis. Thanks to the nut groove on the brace, nuts that connect chassis with the brace will find the position by themselves, removing the need to reset the position for free movement when mounting the pod plate.
The composite upper & lower pivot braces were redesigned to allow the pivot ball to be lowered by 0.5mm so as to lower the roll center of the car, resulting in more rear traction and improved rear stability.
The pivot ball is smaller and lighter, which is very important for a pan car. The pivot ball has an internal thread so a separate locking nut atop the pivot ball is not needed any more. This saves weight but also allows for greater side movement of the rear pod.
Rear Axle
To significantly reduce the rotating mass and improve steering, the original steel rear axle was replaced with an all-new, super-lightweight graphite rear axle.
The rear differential features high-grade precision carbide balls in the spur gear, hardened and precision-ground D-steel shims, and premium carbide axial thrust-bearing.
See the beautiful and detailed presentation of the new XRAY X12: www.teamxray.com/x12/2018
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