REDCAT ASCENT 18 - User Manual

Questions and Answers

K
Kristen HaynesAug 15, 2025
What to do if my REDCAT ASCENT 18 won't steer or move?
- L
  larrymcneilAug 15, 2025
  If your REDCAT Motorized Toy Car won't steer or move, check the following: * Ensure the battery pack is charged. * Make sure the battery wires are securely plugged in. * Follow the start-up sequence.
J
Jerry SmithAug 18, 2025
Why does my REDCAT ASCENT 18 move with no throttle input?
- Z
  Zoe SheltonAug 18, 2025
  If your REDCAT Motorized Toy Car is moving without any throttle input, it could be due to: * Improperly set throttle trim. Adjust the transmitter throttle trim. * The transmitter needing calibration. Calibrate the transmitter.
O
omorenoAug 21, 2025
Why my REDCAT ASCENT 18 Motorized Toy Car turns to the side automatically?
- J
  Jason WhiteAug 21, 2025
  If your REDCAT Motorized Toy Car is turning to the side automatically, you should: * Adjust the transmitter steering trim. * Check the servo horn and replace it if it's worn or stripped. * Replace the servo if the gears are stripped.
F
frankgreenAug 25, 2025
What to do if the motor suddenly stops working on my REDCAT Motorized Toy Car?
- J
  Jennifer SmithAug 25, 2025
  If your REDCAT Motorized Toy Car motor suddenly stops working, check if: * The transmitter has good batteries and is turned on, because the transmitter signal might be lost. * The battery pack needs charging, or the thermal protection may have been activated. In this case, check the battery voltage and the ESC temperature. Let it cool and recharge the battery.
D
Darrell CordovaAug 27, 2025
Why does my REDCAT ASCENT 18 Motorized Toy Car steers to the left when I steer to the right?
- L
  Lucas NguyenAug 28, 2025
  If your REDCAT Motorized Toy Car steers to the left when you steer to the right, it might be because: * The steering reverse on the transmitter is set incorrectly. Correct the steering reverse setting. * You are driving towards yourself. Practice driving the vehicle to get used to steering with different vehicle orientations.
S
Suzanne MartinezAug 30, 2025
What to do if nothing works and the LED on the receiver/ESC is blinking slowly on my REDCAT Motorized Toy Car?
- K
  Kelly PorterAug 30, 2025
  If the receiver/ESC is powered on, but nothing works and the LED is blinking slowly on your REDCAT Motorized Toy Car, it could be due to the receiver not picking up the transmitter signal. Ensure the transmitter is turned on and put new batteries in the transmitter.
Z
Zachary WoodSep 2, 2025
How to fix an ESC that will not power on for REDCAT ASCENT 18?
- D
  Derrick GuzmanSep 3, 2025
  If the ESC of your REDCAT Motorized Toy Car will not power on, make sure that: * A fully charged LIPO battery is plugged into the ESC. * The LIPO battery being used is charged.
J
jilljimenezSep 5, 2025
What to do if nothing works and the LED on the receiver/ESC is blinking quickly on my REDCAT ASCENT 18 Motorized Toy Car?
- J
  Justin BryantSep 5, 2025
  If the receiver/ESC is powered on, but nothing works and the LED on the receiver/ESC is blinking quickly on your REDCAT Motorized Toy Car, it means that the receiver is in BIND mode. Ensure the transmitter is turned on and power on the receiver/ESC again.
L
Lisa MooreSep 8, 2025
Why does my REDCAT Motorized Toy Car run backward when I pull the throttle?
- S
  sbuchananSep 9, 2025
  If your REDCAT Motorized Toy Car ran backward when you pulled the throttle trigger towards you, it could be because: * The radio “Throttle Reverse” switch may be improperly set. Switch the radio “Throttle Reverse” switch. * The motor wiring is incorrect. Be sure the motor is plugged in correctly. The red wire plugs into the tab labelled (+) on the motor.
Q
qdavidsonSep 12, 2025
What causes a clicking noise while steering my REDCAT ASCENT 18?
- L
  Lauren ArnoldSep 12, 2025
  A clicking noise while steering your REDCAT Motorized Toy Car can be caused by: * A stripped servo horn. Replace the servo horn. * Stripped servo gears. Replace the servo.

Summary

Specifications

TRANSMITTER SPECS.

Technical data for the radio transmitter, including RF, distance, and power.

Receiver;ESC Connections

Receiver;ESC Connections - Side View

Illustrates the physical layout and connection points for the receiver/ESC unit.

Transmission;Transfer Case Assembly

Installing Front Axle To Chassis & Shock Assembly

Installing Rear Axle To Chassis

Installing Transmission To Chassis

Installing Battery Tray & Skid Plates To Chassis

Installing Battery Strap, Receiver;ESC & Wheels;Tires

Overview

The Redcat Ascent 18 is a 1/18 scale crawler, an RC vehicle designed for off-road driving and navigating challenging terrain. It comes assembled with electronics, a 2.4GHz radio system, a 2S LiPo battery with a JST connector, and a USB charge cable. To operate the vehicle, four AA batteries are required for the transmitter.

Function Description:

The Ascent 18 is an RC crawler, meaning its primary function is to traverse obstacles and uneven surfaces at relatively low speeds, emphasizing control and articulation over raw speed. The 2.4GHz radio system provides reliable control, and the included LiPo battery powers the vehicle's motor and electronics. The vehicle is designed for enthusiasts aged 14 and older, with a strong emphasis on safe operation and proper maintenance.

Important Technical Specifications:

Transmitter (R3C Radio):

Number of Channels: 4
Use: Surface use only
RF: 2.4GHz ISM
Maximum Power: <20dBm (e.i.r.p.) (EU)
2.4GHz Protocol: 2A-BS (Automatic Frequency Hopping Digital System)
Distance: >300m (Ground Distance w/o Interference)
Channel Resolution: 1024
Input Power: (4x) 1.5AA batteries
Low Voltage Alarm: <4.2V
Antenna: Built-in
Temperature Range: -10°C to +60°C
Humidity Range: 20%~95%
Dimensions: 16019397mm
Weight: 220g
Certifications: CE, FCC ID: N4ZG4P00, IC: 24025-RTX4C00

Receiver/ESC (R3C-ER 2-in-1 ESC/RX):

Number of Channels: 3
Compatible Models: 1:18 Crawler
RF: 2.4GHz ISM
2.4GHz Protocol: 2A-BS
Distance: ≥ 300m (Ground Distance w/o Interference)
Input Power: 2S LiPo
BEC Output: 5V/1A
Data Interface: PWM
Cont. / Peak Current: 10A/40A
Applicable Motors: 180 Brushed Motor
Temperature Range: -10°C to +60°C
Humidity Range: 20%~95%
Weight: 9.8g
Dimensions: 382513mm
Certifications: CE, FCC ID: 2A2UNR3A00

Battery:

Type: 750mAh 2S LiPo Battery Pack (RER31100)

Motor:

Type: 180 Motor (RER30068)

Servo:

Type: Hexfly HX-M4K 4kg coreless metal gear micro servo (RER21791)

Usage Features:

Startup and Shutdown:

Transmitter Batteries: Insert four AA batteries into the controller, aligning polarity correctly.
Body Access: Turn the rear 1/4 body fastener, tilt the body forward, and unclip the front hinge to access the electronics.
Battery Connection: Strap in a fully charged 2S LiPo battery pack and plug it into the ESC.
Power Sequence: Turn on the radio first, then the ESC.
Shutdown Sequence: Unplug the battery from the receiver, then turn off the transmitter.

Radio Adjustments:

Servo Reverse (ST.REV / TH.REV): Switches on the transmitter reverse the direction of movement for steering (CH1) and throttle (CH2). Useful if the vehicle steers or moves opposite to controller input.
Steering Trim (ST.TRIM): Adjusts the neutral position of the steering.
Throttle Trim (TH.TRIM): Adjusts the neutral position of the throttle.
Steering D/R (ST.D/R): Adjusts the maximum steering travel (0-120%).
Calibration: A function to correct mechanical deviations of the throttle trigger and steering wheel. Involves holding the steering wheel and throttle trigger at max travel while powering on the transmitter, then moving them through their full range.
Mode Switching: Allows multiplexing ST.TRIM and ST.D/R buttons for CH1, CH2, CH3, and CH4 adjustments by quickly pressing the BIND button twice.
Beginner Mode: Limits throttle output to 50% and sets a specific channel range. Activated by holding the CH4 button and turning the steering wheel counterclockwise while powering on the transmitter.

Failsafe:

Function: Protects the model and surroundings if the connection between the receiver and transmitter is lost.
Default: CH2 (throttle) is set to braking. Other channels maintain their last output.
Setting: With both transmitter and ESC ON, hold the control at the desired failsafe position, then press and hold the BIND button for 3 seconds.

Protection Features:

Low Voltage Protection: Cuts off power to all channels when battery voltage drops below a safe operating range.
Overheating Protection: Cuts off power to CH2 (motor) if the receiver/ESC overheats. Power resumes once cooled.
Drive Train Blockage Protection: Cuts off power to the motor if a blockage is detected to prevent damage.

Maintenance Features:

Pre-Run Inspection:

Always perform a pre-run inspection to ensure no damage and that all screws and wheel nuts are secure. Repair or replace damaged parts before use.

Battery Care:

Never leave the battery connected when not in use.
Store batteries according to manufacturer instructions.
Never leave a battery unattended while charging.
Never charge batteries inside the RC vehicle.
Use a LiPo-specific charger and a LiPo safe charging pouch for LiPo batteries.
Discontinue use and properly dispose of any damaged or swollen LiPo batteries.

Electronics Care:

Allow the vehicle to cool down between runs to prevent overheating of electronics, which can shorten their lifespan.
Keep the receiver's antenna at least 1cm away from conductive materials (carbon or metal) to ensure optimal signal strength.
Avoid installing the receiver near the motor or other sources of electrical noise.

Troubleshooting:

The manual provides a detailed troubleshooting guide for common issues such as:

ESC not powering on.
Vehicle running backward.
Vehicle moving without throttle input.
Motor stopping suddenly.
Receiver/ESC powered on but not working (slow or quick blinking LED).
Clicking noise while steering.
Vehicle not steering or moving.
Vehicle turning automatically.
Incorrect steering direction.

Solutions often involve checking battery charge, verifying radio settings (reverse switches, trims, calibration), ensuring proper connections, and inspecting servo components.

Exploded Views and Parts List:

The manual includes comprehensive exploded views for various assemblies (Transmission/Transfer Case, Portal Gear, Front Axle, Rear Axle, Chassis, Front Axle to Chassis & Shock, Rear Axle to Chassis, Transmission to Chassis, Battery Tray & Skid Plates, Battery Strap, Receiver/ESC & Wheels/Tires, Body Assembly, Body Installation). These diagrams are accompanied by a detailed parts list with part numbers (e.g., RER28661, RER11378) for easy identification and ordering of spare and hop-up parts.

Hop Up Parts:

A dedicated section lists available hop-up parts, including various aluminum and brass components for improved durability and performance, such as portal boxes, diff covers, links, wheel hexes, shock bodies, and steel transmission gear sets.

Important Links:

The manual directs users to the Redcat Racing website for the full-length manual, ESC guide, radio guide, exploded views, parts lists, and a specific manual for electric vehicles.