UFRC Ghost Rabbit GR1 4WD 1:5 Brushless Buggy with Tires
The GR1 comes out of the box almost as an all-metal vehicle. Tuning parts to reinforce the model are no longer necessary.
Center and rear differential come standard with mechanical locks which can be activated independently by the radio. Of course, a radio system with the appropriate number of channels is required to use this feature.
The dimensioning of all parts is designed for great reliability, e.g. the ball joints in the lower trailing arms are standardized industrial swivel bearings with an inner diameter of 6 mm, and the driveline can handle 12S hands down. But according to our experience, 12S operation is simply unnecessary.
Oversized drive shafts also on the front axle are machined and hardened steel with fixed joints at both ends and sliding piece for length compensation.
The tires feature a vulcanized fabric reinforcement made of Kevlar; ballooning is actually a thing of the past for them. Thanks to Kevlar, the fabric belt can be relatively thin, so the tires are soft and flexible despite the fabric.
Aluminum servo arms for all 4 servos (steering and differential locks) are standard. The levers of the two steering servos are adjustable.
Each steering servo has its own adjustable servo saver. A stainless steel adjustment tool is included.
The Ackerman rod features four ball bearings.
Shock absorbers with 8 mm piston rods and hard anodized shock bodies.
All drive gears milled from steel and hardened.
Two voltmeters can be optionally installed in the receiver box to monitor the traction batteries.
The cage can be removed with only 4 clips, but even that is not a requirement for battery replacement.
Ghost Rabbit GR1 (1/5 4WD solid rear axle)
Main features of the 4WD Ghost Rabbit GR1:
The strength of the components supports 12S power
The wheelbase of 1/5 scale cars: 565mm
The length of 1/6 scale cars: total length 790mm (when equipped with wheels with a diameter of 230mm)
The whole car uses mostly metal parts, so there is no need to spend a lot of money on option parts later.
The weight of the GR1 ready to run with 2x 4S/10.000 mAh batteries and 700KV motor is about 22 kg.
But if you think now that this is a ponderous steamroller, you better think again. A "Tank on speed" is a better description. Despite the weight, wheelies can be called up at any time thanks to the appropriate gear reduction, even if the controller is only set to level two of four in acceleration (punch).
At the same time, the possible twisting of the chassis is almost like that of a crawler. With the diff locks activated, the GR1 is almost unstoppable.
Technical details:
Drive train: full-time 4WD with 3 differentials (remote rear and center differential lock as standard equipment)
Front suspension type: double a-arm IFS
Rear suspension type: solid rear axle with 4-link suspension
Scale: 1/5
Wheelbase: 565mm
Front track width: 420mm
Rear track width: 420mm
Caster angle of kingpin: 20 degrees
Front camber (adjustable): 3 degrees
Toe-in (adjustable): 3 degrees
Rear toe-in (not adjustable): 0 degrees
Rear camber (not adjustable): 0 degrees
Approach angle: about 90 degrees
Departure angle: about 90 degrees
Break-over angle: about 45 degrees
Minimum turning radius: about 1.5 meters
The maximum steering angle: about 30 degrees
Maximum gradient: about 50 degrees
Slide slope: about 40 degrees
Maximum articulation: about 80 degrees (need to remove the front and rear anti-roll bars and loosen the angle limit screws of the front shock mounting beam)
Lower trailing arm length (center/center of spherical bearings): 257 mm
Chassis ground clearance (wheel diameter 230 mm): 115 mm
Ground clearance under rear differential (wheel diameter 230 mm): 75 mm
The maximum external dimensions of the vehicle body (length × width × height): 790 mm × 525 mm × 380 mm (with wheels of 230 mm diameter and 100 mm width)
Gear ratio range: 9:1 to14.9:1 (The gear ratio can be changed by different gear set in the center gear box)
Factory standard gear ratio: 14.9:1
Gear modulus: M1.5
Number of locking differentials: 2, servos for activation not included
Locking differential positions: center and rear
Wheel size: diameter 230 mm; width 100 mm. The tires feature Kevlar fiber belt to prevent ballooning and can handle 12S power
Wheel drive size: 24 mm hex
Front shocks mounting length (two-stage springs): 170 mm
12S power 110 km/h (based on a 680KV motor) (The maximum speed is calculated based on the electronic components and the actual numbers may vary)
Weight of empty frame (excluding wheels and electronic components): 13.5 kg
Total weight: approx. 22 kg
Maximum payload of the frame: about 10 kg (do not press heavy objects or let people sit on the frame for driving operations, which may cause damage to parts)
Lubricants parameters
Front shock oil (silicone oil): 100cst
Rear shock oil (silicone oil): 100cst
Front differential oil (silicone oil): 300,000 cst
Center differential oil (silicone oil): 300,000 cst
Rear differential oil (silicone oil): 300,000 cst
Front gearbox (grease): Swedish molybdenum disulfide high temperature grease (blue)
Center gear box (grease): Swedish molybdenum disulfide high temperature grease (blue)
Rear axle gearbox (grease): Swedish molybdenum disulfide high temperature grease (blue)
(The above lubricants parameters are for reference only, and can be replaced according to your driving habits and environment)
Frame materials and parts specifications, etc.
Chassis
Material: AL6061-T6 (aluminum)
Processing technology: CNC machining, no stamp-out processing
Surface treatment: hard anodizing and hardening
Specifications: thickness 5 mm
Front skid plate plate (standard configuration)
Material: AL6061-T6 (aluminum)
Processing technology: CNC machining non-casting
Surface treatment: hard anodizing and hardening
Specifications: thickness 5 mm
Lower trailing arms
Material: AL6061-T6 (aluminum)
Processing technology: CNC machining
Surface treatment: anodizing
Specifications: The thickness of the part is 30 mm
Processing technology: hot isostatic pressing sintering
Heat treatment process: vacuum
Differential locking clutch
Material: high-strength billet carbon steel
Processing technology: CNC
Heat treatment process: carburizing and hardening
Surface treatment: electroplating
Front suspension drive shaft (CVD structure at the wheel end, universal joint structure at the gear box end)
Material: high-strength billet carbon steel
Processing technology: CNC
Heat treatment process: carburizing and hardening
Surface treatment: electroplating
Specifications: CVD end shaft diameter 12 mm; gearbox end universal joint maximum outer diameter 32mm
Center drive shaft
Material: high-strength billet carbon steel
Processing technology: CNC
Heat treatment process: carburizing and hardening
Surface treatment: electroplating
Specification: shaft diameter 12 mm
Rear universal drive shaft
Material: high-strength billet carbon steel
Processing technology: CNC
Heat treatment process: carburizing and hardening
Surface treatment: electroplating
Specifications: The outer diameter of the spline telescopic shaft is 12 mm; the maximum diameter of the universal joint is 32 mm.
Rear axle shafts
Material: high-strength billet carbon steel
Processing technology: CNC
Heat treatment process: carburizing and hardening
Surface treatment: electroplating
Specifications: shaft diameter 12 mm, non-pin positive locking structure, shaft reaches into the differential planetary gear.
Front bumper
Material: high strength nylon
Roll cage
Material: high strength nylon
Specification: diameter 10mm
Car body shell panels
Material: Polycarbonate
Specifications: thickness 1.5 mm
Clear
Receiver box: nylon
Front and rear shock absorption main parts
Upper shock cap
Material: AL6061-T6 (aluminum)
Processing technology: CNC
Surface treatment: anodizing
Shock body
Material: AL6061-T6 (aluminum)
Processing technology: CNC
Surface treatment: hard anodizing and hardening
Specification: barrel diameter 28mm
Shock spring
Material: piano wire
Surface treatment: black nickel plating
Specification: front 2.8mm/rear 2.5mm
Shock piston rod
Material: high-strength carbon steel
Processing technology: high precision grinding
Heat treatment: carburizing and hardening
Specification: diameter 8mm
Spring perches
Material: nylon
Piston
Material: nylon
Processing technology: CNC machined, no injection molding
Sealing ring
Material: silicone
Front shock mounting beam: AL6061-T6 (aluminum)
Rear shock tower: AL6061-T6 (aluminum)
Servo fixing frame: AL6061-T6 (aluminum)
Steering rods
Material: high-strength carbon steel
Specification: 6mm
Processing technology: CNC
Heat treatment process: carburizing and hardening
Surface treatment: electroplating
Steering linkage rods
Material: high-strength carbon steel
Specification: 6mm
Processing technology: CNC
Heat treatment process: carburizing and hardening
Surface treatment: electroplating
Rear axle stabilizer bar
Material: high-strength carbon steel
Specification: 6 mm
Processing technology: CNC
Heat treatment process: carburizing and hardening
Surface treatment: electroplating
Ball heads
Material: SUS304 stainless steel
Specification: ball diameter 11 mm
Front lower A-arm: high-strength nylon
Center gear box mounts: AL6061-T6 (aluminum)
Lower trailing arm brackets: AL6061-T6 (aluminum)
Adjustable steering servo arm (comes as standard!): AL6061-T6 (aluminum) (adjustment angle 20 degrees)
Wheels
Specifications
Diameter: 230 mm
Width: 100 mm
Hexagonal drive: 24 mm
Material
Rim: high-strength nylon
Tire skin: natural rubber (Kevlar fiber belted)
Liner: high elastic sponge
Hex drive: The hex insert is powder steel metallurgy, and the outer reinforcement ring is SUS304 stainless steel
All vehicle screws: 10.9 grade carbon steel
General components:
Frame version instructions: You need to purchase motors, ESCs, steering servos, differential lock servos, remote controls, batteries, chargers, common tools, etc. separately. The frame is already assembled, you only need to install the electronic equipment yourself and debug it.
Wheels: Most 1/5 scale wheels with 24 mm hex drive and a diameter ranging from 190-230 mm and a width of 70-100 mm can be used. When the diameter is greater than 190 mm and the width is greater than 80 mm, the steering angle needs to be limited, and the steering angle has to be adjusted on the transmitter to about 75%. It is recommended to use wheels with a diameter of 230 mm and a width of 100 mm to maximize the performance and handling of the car.
Specifications: market standard motor for 1/5 vehicles, such as 5692/56112/58113
When using 8S power, the motor KV value should be lower than 800.
When using 12S power, the motor KV value should be lower than 600. When selecting a 12S motor, you should accurately consult whether it supports 12S power. Improper selection may cause serious damage to the motor.
The diameter of the motor shaft is 8 mm, and the depth of the flat surface is 1 mm.
The protruding length of the motor shaft should be greater than 20 mm and less than 40 mm.
Quantity: 1
Battery
8S: 2 groups of 4S (6,000-12,000 mAh) in series
12S: 2 sets of 6S (6,000-12,000 mAh) in series
When choosing a battery, it should be noted that the three-dimensional size of the two batteries together cannot be larger than the size of the battery compartment.
Use common 1/5 model servos (mounting bolt pattern 17.5 mm×75 mm).
Quantity: 2
Differential lock servo
Specification (25T output shaft): 15-35 kg
Use common 1/8 model steering servos ( mounting bolt pattern 10.0 mm × 49.5 mm), it is recommended to use 25 kg steering gear, but it should not be stronger than 35kg, which may easily cause the displacement of the differential lock limiter and change the pulling stroke. The differential lock function fails.
Quantity: 2
Remote control
Type: car
Channels: 5 channels or more (steering; throttle; differential lock uses two channels; car lighting (optional) channel)
Quantity: one set
Charger
Type: Equipped with lithium battery balancing function
Specifications: 4S or above
Quantity: one set
Battery safe storage container
Common tools
Tool type: Allen key wrench; Hex wrenches; circlip pliersAllen wrench
