Table of Contents
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Table of Contents
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Summary of Contents for Hudy X-Ray X10
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Page 2: Table Of Contents
CONTENTS Introduction Equipment and Tools Set-up System Components Tools and Equipment Assembling and Installing the Set-up Stands Assembling the Set-up Stands Assembling the Set-up Board Installing the Set-up Stands Overview of Car Set-up Downstops Effects of Downstop Adjustment Measuring Downstops Adjusting Downstops Ride Height Effects of Ride Height Adjustment... -
Page 3: Introduction
The HUDY Off-road Set-up Book describes how to adjust your off-road car/truggy to suit your driving style. For each individual set-up area, we describe the effects of changing the adjustment and how to make the adjustment. -
Page 4: Equipment And Tools
EQUIPMENT AND TOOLS When setting up, operating and maintaining your off-road car or truggy, we strongly recommend using high-quality professional HUDY set-up equipment and tools. SET-UP SYSTEM COMPONENTS #108805 Exclusive Alu Set-Up System For All 1/8 Off-road Cars & Truggies •... -
Page 5: Tools And Equipment
TOOLS & EQUIPMENT Turnbuckle Wrenches • precision turnbuckle wrenches designed exclusively by HUDY from special self- developed, world-renown HUDY Spring Steel™ to ensure maximum strength, durability, and long life • additionally hardened provide unmatched life span • wrench head shape is hand-ground on a precision grinding machine to ensure a very precise shape to a snug fi... - Page 6 • very durable, long life #107600 Reamer For Lexan Bodies • professional-quality reamer cuts perfect holes 0-18mm diameter • exclusive design by HUDY • very light non-slip duraluminum handle • special CAD-designed cutting head, hand- ground on specially-modifi ed production machinery •...
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Page 7: Assembling And Installing The Set-Up Stands
ASSEMBLING AND INSTALLING THE SET-UP STANDS When you are measuring and adjusting track-width, camber & camber rise, caster, toe, steering throw symmetry, and tweak, you will need to assemble and install the set-up stands. When you are measuring downstops and ride height, you do not need to use the set-up stands. -
Page 8: Assembling The Set-Up Board
The completed set-up board consists of the Set-Up Board and the Set-Up Board Decal. IMPORTANT: You should always use only the HUDY set-up board when setting up your car with the HUDY All-In-One Set-Up Solution. This exceptionally fl at, warp-free board will ensure accurate, precise measurements. -
Page 9: Overview Of Car Set-Up
OVERVIEW OF CAR SET-UP When setting up your off-road car/truggy, we recommend setting it up in the order indicated in the table below. The order of the settings has been determined as the most logical to set up your car/truggy properly and easily. Also, certain settings must be made before others, as changing one setting will impact another setting. -
Page 10: 1.1 Downstops
1.1 DOWNSTOPS Downstops limit how far the suspension arms travel downward, which determines how far upward the chassis rises. This affects the car’s handling (due to effects on camber and roll-center) and the ability of the tires to “follow” the track. The effects may change with the type of track and/or amount of grip available. -
Page 11: Adjusting Downstops
Place the droop blocks on the fl at set- ➊ up board, and then place the fl at part of the chassis (not the angled part) on the blocks. Make sure the chassis is solidly mounted on the support blocks so it does not move. -
Page 12: 1.2 Ride Height
1.2 RIDE HEIGHT front ride height rear ride height Ride height is the height of the chassis in relation to the surface it is sitting on, with the car ready to run. Ride height affects the car’s traction since it alters the car’s center of gravity and roll center. -
Page 13: Adjusting Ride Height
Lift the rear of the car and let it fall back ➍ to the set-up board by itself. Using the droop gauge, measure the ➎ ride height value at the rear of the car. FRONT RIDE HEIGHT Place the droop gauge under the front of the chassis (under the FLAT part of the chassis, not the angled part) and measure the difference between the set-up board and the bottom of the chassis. -
Page 14: Camber
CAMBER Camber is the angle of a wheel to the surface on which the car is resting (with wheels and shock absorbers mounted). • Zero degrees (0°) of camber means that the wheel is perpendicular to the reference surface. • Negative camber means that the top of the wheel is leaning inwards towards the centerline of the car. -
Page 15: Adjusting Camber
Push on the car so the chassis rests fl at ➍ atop both droop blocks at front and rear. Read the camber setting from the ➎ camber gauge of each of the four set-up stands. Each graduated mark indicates a 1° camber value. -
Page 16: 1.4 Track-Width
1.4 TRACK-WIDTH front track-width rear track-width Track-width is the distance between the outside edges of the wheels, front or rear, and it affects the car’s handling and steering response. It is important that front or rear track- width is adjusted symmetrically, meaning that the left and right wheels (at one end of the car) must be the same distance from the centerline of the chassis. -
Page 17: Adjusting Track-Width
Make sure the front wheels rest on ➌ the front track-width graduation marks. The amount of toe-in/toe-out has direct infl uence on the track width so make sure to measure at the part where the car is widest. Make sure the rear wheels rest on the ➍... -
Page 18: 1.6 Caster
1.6 CASTER Caster describes the angle of the front steering block with respect to a line perpendicular to the ground. The primary purpose of having caster is to have a self-centering steering system. Caster angle affects on- and off-power steering, as it tilts the chassis more or less depending on how much caster is applied. -
Page 19: Adjusting Front Caster
Assemble the set-up stands. ➊ Mount the set-up stands on the axles. ➋ Place the car on the set-up board. ➌ Read the caster angle from the side of ➍ the front set-up stands. Read the caster angle on the side plates between the imaginary line that goes from the top pivot point to the bottom pivot point. -
Page 20: 1.6 Toe
1.6 TOE Toe is the angle of the wheels when looked at from above the car. Toe is used to stabilize the car at the expense of traction, as it introduces friction and therefore some slip in the tires. • When the wheels are parallel with the centerline of the car, toe is 0° (neutral). •... -
Page 21: Adjusting Toe
Assemble the set-up stands. ➊ Mount the set-up stands on the axles. ➋ Place the droop blocks on the fl at set-up ➌ board, and then place the fl at part of the car chassis (not the angled part) on the blocks. -
Page 22: 1.7 Steering
1.7 STEERING steering Steering systems may be adjustable for Ackermann angle, servo saver preload, and bump steer. 1.7.1 ACKERMANN Ackermann controls the difference in steering arcs between the front inside and outside wheels; the inside wheel always has a tighter arc in any corner. The amount of grip provided by the tires, in relation to the steering arc and speed of the car, create an amount of measurement called a “slip angle”... -
Page 23: Servo Saver Preload
1.7.2 SERVO SAVER PRELOAD On cars equipped with an adjustable steering servo server, you may adjust the spring preload to alter the steering characteristics. EFFECTS OF SERVO SAVER PRELOAD SERVO SAVER SPRING PRELOAD CHARACTERISTICS • Less steering Softer • Better suited to standard servos •... -
Page 24: Roll Center
ROLL CENTER A “roll center” is a theoretical point around which the chassis rolls, and is determined by the design of the suspension. Front and rear suspensions normally have different roll centers. The “roll axis” is the imaginary line between the front and rear roll centers. The amount that a chassis rolls in a corner depends on the position of the roll axis relative to the car’s center-of-gravity (CG). -
Page 25: Rear Roll Center
1.8.2 REAR ROLL CENTER Typically on off-road cars (such as the XRAY XB808) rear roll center is adjusted using the rear upper camber link inner mounting position on the rear shock tower. Those same holes on the rear shock tower may also be used to adjust camber rise. For more information, see the section on Camber &... -
Page 26: Shock Absorbers
SHOCK ABSORBERS Shock absorbers, or shocks, are the suspension components that allow the wheels to keep as much contact as possible with the track surface. All off-road cars & truggies have fully-independent front and rear suspension, meaning that the suspension at each corner of the car (front left, front right, rear left, rear right) moves and may be adjusted independently of the others. -
Page 27: Shock Oil
Different size holes also produce an effect known as “pack” which affects how quickly the shocks respond. • Smaller holes increase the pack of the shock, which is better suited to big-jump tracks where you will often land on the fl at surface & not the down ramp side of the jump. It slows things on compression and rebound, and is not well suited to very bumpy tracks. -
Page 28: Shock Mounting Position
1.9.3 SHOCK MOUNTING POSITION You can change the shock mounting position by leaning the shocks at different angles, and also moving the shock closer or further from the centerline of the car. EFFECTS OF SHOCK MOUNTING POSITION ADJUSTMENT SHOCK POSITION CHARACTERISTICS •... -
Page 29: Kick-Up (Front)
ADJUSTING SHOCK PRELOAD Adjust the front and rear shock spring preload by using preload clips of various thicknesses above the shock springs, or by adjusting the height of threaded preload adjustment collars. Initial set front preload so that the front and drive shafts are level, and initially set rear preload so that the rear lower arms are level. -
Page 30: Anti-Squat (Rear)
1.11 ANTI-SQUAT (REAR) Rear anti-squat is the angle of the rear lower suspension arm when viewed from the side of the car. With anti-squat the back of the arm is lower than the front of the arm. Rear anti-squat is used as a tuning aid primarily when a car needs to run a soft rear spring but also has a tendency for the rear end to squat down too much under... -
Page 31: Wheelbase
1.12 WHEELBASE wheelbase Wheelbase refers to the horizontal distance between the front and rear axles. Changes to wheelbase can have a dramatic effect on the handling of your car, since it readjusts the distribution of weight on the wheels, which adjusts traction. Not all RC cars have the option to adjust the wheelbase. -
Page 32: Anti-Roll Bars
1.13 ANTI-ROLL BARS Anti-roll bars are used to adjust the car’s side (lateral) grip. They can also be used in conjunction with a softer spring rate to handle bumpy tracks more effi ciently without excessive chassis roll at mid-corner. Anti-roll bars resist chassis roll and by doing so transfer wheel load from the inside wheel to the outside wheel. -
Page 33: Rear Wing
1.14 REAR WING The angle and position of the rear wing affects stability at various speeds, increases or decreases rear traction, and also affects car attitude when jumping. EFFECTS OF REAR WING ADJUSTMENT WING POSITION/ANGLE CHARACTERISTICS Higher • Increases stability at higher speeds Lower •... -
Page 34: Clutch
CLUTCH A properly set up clutch will have a dramatic impact on the performance and drivability of your off-road car. It is important to note that there are many factors that may affect engine and clutch performance, including engine tuning, proper clutch assembly, clutch shimming, spring rate, and shoe orientation can all affect clutch performance. -
Page 35: Differentials
DIFFERENTIALS Off-road cars typically feature sealed gear differentials at the front, center, and rear. The characteristics of the differentials may be adjusted by using thinner or thicker differential oils inside their cases. Optional differentials – such as the XRAY Active Diff™... -
Page 36: Differential Gears
2.1.2 DIFFERENTIAL GEARS Another tuning option for the differentials is to change the outer crown or spur gears to tailor the car to your driving style or track conditions. Note that overdrive changes are only done in the front. EFFECTS OF DIFFERENTIAL GEAR REPLACEMENT GEAR WHEN TO USE FRONT... -
Page 37: Gearing
ACTION EFFECT Off-power the Active Diff works the same way as standard front differential, so adjustment is made by using different viscosities Off-power Action of silicone oil to get the desired off power steering. The softer the oil, the more off-power steering but the car will be more aggressive. - Page 38 HUDY strives to maximize. HUDY's manufacturing facility is the most modern in the RC industry. Hudy employs over 90 professionals,and the manufacturing facility is large over...
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Page 39: Recommended Chemicals For Off-Road Cars
• excellent rust and corrosion resistance • very good anti-wear properties #106230 HUDY Bearing Oil • high-quality HUDY Bearing Oil is used to lubricate bearings for ultra-smooth operation and long lifespan • very good for use on dusty tracks and carpet tracks because it helps combat the effects of dust and carpet hair contamination •... - Page 40 HUDY, PRED POLOM 762, 911 01 TRENCIN, SLOVAKIA, EUROPE 5 8 1 7 0 2 0 9 0 9 9 2...
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