This document provides an overview of the basics of a nitro engine car. It describes the key parts needed including the engine, glow plug, carburetor, and crankshaft. It explains how the glow plug is used to start the nitro engine and the purpose of the carburetor. It also discusses the fuel used, transmission components, braking system, electronics including receivers and servo motors, assembly process, chassis, suspension setup, and steering components of a nitro engine car.

1. Company Proprietary and Confidential 1
Basics of Nitro Engine CarBasics of Nitro Engine Car
Mr. KONAL SINGHMr. KONAL SINGH
Director and Founder of
ProBotiZ Group, NagpurProBotiZ Group, Nagpur
(W) - Probotizgroup.com (M) - 8862098889, 9423632068 (E) - probotizinfo@gmail.com

2. Company Proprietary and Confidential 2
Engine & Transmission
Parts Required:
• IC-Engine
(3cc single cylinder)
• Glow Plug
(Glow Plug starter
Rechargeable)
• Carburetor
• Crankshaft
(mostly comes with the engine)
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3. Company Proprietary and Confidential 3
Glow Plug
• To start a glow plug engine, a small direct current (around 1.5 volts)
is applied to the glow plug, using the glow plug starter, initially
heating the filament.
• The engine is then spun from the outside to introduce fuel to the
chamber.
• When fuel enters the combustion chamber, it is ignited by the
heated glow plug and with that, the engine springs to life, instantly
gaining the momentum to continue running after all the starter
accessories are removed.
• The engine’s Carburettor supplies the fuel and air needed for
combustion.
• It has several adjustments.
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4. Company Proprietary and Confidential 4
Carburettor
Engine Tuning:
•Adjust the
Fuel/air Ratio.
•Low Speed
Needle (screw).
•High Speed
Needle (screw).
•Idle Screw.
•Turn to Adjust
Them
(similar to
kitchen taps).
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5. Company Proprietary and Confidential 5
Fuel
•Mixture of methanol (75-80%), nitro methane (15-20%), castor oil
(5- 10%) called hobby fuel/ nitro fuel.
•Always keep the fuel in air tight container.
•Nitro methane is an explosive so handle carefully.
How to Stop the Engine
•Block the air cleaner with your fingers.
•Squeeze the fuel line.
•Either method will stop the engine.
•Squeezing the fuel line will rev up the engine first and then stop as the
engine leans out.
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6. Company Proprietary and Confidential 6
Transmission
•Differential with Casing.
•Dogbone Shaft (Drive Shaft).
•Clutch.
•Gear Box (Nylon Gears).
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7. Braking System
• An RC car uses a combination of Disc brakes but Cam is used for
actuation instead of hydraulic pressure.
• When servo is rotated in opposite direction, the carburetor is in
closed state, thus throttle gets cut off. At this position Brake cam
bushing pushes brake pad on its side against rotor.
• As result rotor gets pressed against brake pads and thus RC Car
stops.
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8. Parts Required
The following parts are required for manufacture of basic brake system:
•Brake pad/disc (Each rotor needs 2 brake pad).
•Brake callipers (If you use hydraulic brake system. 1 on each brake rotor).
•Master Cylinder & Spring (For hydraulic brake system)
•Brake rotors.
•Brake cam.
•Brake cam linkage.
•Brake cam bushings.
Parts common to transmission and brakes are:
•Drive shaft cups.
•Transmission box onto which driveshaft are attached.
Servo motor to regulate Throttle opening position in carburettor.
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9. Electronics
Receiver / Transmitter System
•For controlling a simple Nitro RC Car a simple 2 channel
RC controller will serve the purpose.
•The servo reads pulses from the receiver and moves the
servo output arm to a certain position.
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10. Servo Motors
• 2 motors required.
• Used to control throttle, brakes and
steering.
• Contains three wires coming out of it,
two of them give power and the third
controls the rotation.
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11. Company Proprietary and Confidential 11
Assembly
Servo Motor 1
• Controls both throttle and braking.
• Set the servo motor mean position at some angle in between its total
angle of revolution.
• Deviation of the servo motor in one direction will increase the air
intake of the IC engine, enabling throttle ( functions as the accelerator
pedal of a car).
• Deviation of servo motor in opposite direction actuates the brakes
( works as the brake pedal in a car).
Servo Motor 2
• Steers the car using the same rotational principal explained above.
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12. Chassis
•The basic frame or chassis of a radio controlled vehicle is the
platform upon which internal parts such as the motor and the
receiver sit. It's like a skeleton of human body.
•The chassis is typically made of a heavy, rigid plastic or aluminium.
•It provides good stability to the vehicle.
•It is less fragile in case of crashes.
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13. Suspension
•Suspension is the system of linkages and springs or shocks that
allows the wheels to move up & down independent of the chassis or
body.
•It gives the best suspension travel for a typical car.
•It protects the car and all its components.
•It prevents the car from rolling.
•It provides damping.
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14. Suspension-Basic terms
•Toe in/out : Toe-in means the tires point inwards, and toe-out means
the tires point outwards.
•Camber : Angle between the tire's centreline and the vertical plane (
usually negative).
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15. Under True
Ackerman
•In this setup the
intersection point falls
behind the axle centre.
•This causes the steering
response of the vehicle to
decrease slightly.
•So it could be described as
have toe in in relation to the
turning circle.
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16. • The steering ratio can be
adjusted by moving the outer
steering pickup point along the
Ackerman Axis (dotted line),
and still maintain the
Ackerman geometry.
• This action will decrease the
steering effort required, but it
will also slow the steering.
Steering Ratio
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17. Steering Assembly
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18. www.probotizgroup.in
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Mr. KONALMr. KONAL
Director ofDirector of PProroBBotiotiZZ
(M) -(M) - 94236320689423632068

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