2. Aeromodelling is the art of designing, building
and flying miniaturized aircrafts
(powered or non-powered).
What is Aeromodelling?
It is both a hobby and sport; the hobby aspect
involves building and assembling model aircraft,
and the sport part involves the flying.
3. Model airplanes are
sized down models of
an aircraft
The calculations are
easy and importance
is given to building of
the plane
4. What is this Workshop about?
Did you always want to get into the aviation
industry? Have you ever dreamt of becoming an
Aeronautical Engineer? Ever wondered how it
feels to design your own aircraft and see it soar
into the sky? Then Take a Break and come to Jet
wings RC Aircraft Workshop.
5. WHY ?
This workshop by Jet wings gives you an
opportunity to understand the theory behind the
functioning of aircraft and aircraft design. It
makes you innovate by coming up with your own
design of an RC aircraft and fabricate it from
scratch. An interactive lecture session and design
session helps you design the best performing
aircraft.
8. LIFT
It’s the upward force acting on the planes due
to the air flow over the wings
It is determined by the design of the wing and
the wind nature as
L=1/2ρV2ACL
CL is the lift coefficient
V is flight speed, A is wing area
ρ is density of air
9. THRUST
It’s the force provided by the engine of the
plane
Mainly two type of thrust generators are used
1. IC Engines
2. Electric Motors
We will be seeing about electric motors here
10. WEIGHT
This is the weight of the plane along with its
payload and motors.
This should be minimized as much as possible by
proper design.
11. DRAG
This is the weight of the plane along with its
payload and motors.
This should be minimized as much as possible by
proper design.
12. Difference between aircraft and
airplane?
An aircraft is any machine that can fly.
Airplanes, hot air balloons, helicopters, or
even flying platforms are considered aircraft.
An airplane is a specific type of aircraft that
has fixed wings and engine, it is heavier than
air that is capable of sustained, powered, and
controlled flight.
13. What is an RC aircraft or RC
plane?
A remote-controlled
aircraft is a small flying
machine that is
controlled remotely by
an operator on the
ground using a hand-held
radio transmitter
14. Materials used for RC aircrafts
Balsa
Styrofoam
Depron
Coroplast
15. Balsa
This wood is very light and can
can easily work for almost
every purpose in aeromodelling.
16. Styrofoam
This material is light as
well as strong.
It is a kind of expanded
polystyrene used especially
especially for making RC
aircraft structure.
17. Depron
It is a closed cell Styrofoam
foam in sheet form.
It is a fantastic medium for
building model aircraft.
It is extremely lightweight.
18. Coroplast
Coroplast is simply the two
sheets of plastic separated
by another layer of zigzagged
zigzagged plastic.
It is lightweight, inexpensive,
inexpensive, and fairly sturdy.
21. Brush-Less DC motor (BLDC)
A Brush-Less DC motor (BLDC) is a synchronous
electric motor which is powered by direct-current
electricity (DC) .
Which has an electronically controlled
commutation system, instead of a mechanical
commutation system based on brushes.
In such motors, current and torque, voltage and
rpm are linearly related.
23. A Servo is a small device that has an output
shaft.
This shaft can be positioned to specific angular
positions by sending the servo a coded signal.
As long as the coded signal exists on the input
line, the servo will maintain the angular
position of the shaft.
As the coded signal changes, the angular
position of the shaft changes.
servo motor
24.
25. A transmitter is an electronic device which,
usually with the aid of an antenna, propagates
an electromagnetic signal such as radio,
television, or other telecommunications.
When talking about RC transmitter modes we are
referring to how the transmitter is set up to
control the airplane
which sticks operate which controls on the
model.
Transmitter
26.
27. It consists of receiver module
and a antennae wire of about 2-
3 feet long.
The receiver gets signal from the
transmitter and then acts upon
the servos
Nowadays there are ECSs which
have separate power for the
receiver so there is no need for
separate power.
Receiver
28. Li-poly batteries are also gaining favor in the
world of Radio-controlled aircraft as well as
Radio-controlled cars
where the advantages of both lower weight
and greatly increased run times can be
sufficient justification for the price.
However ,lithium polymer-specific chargers
are required to avoid fire and explosion.
Lithium polymer batteries
31. The lift generation is decided by the shape
of the wings and the aerofoil
The lifting force is provided by the
difference in the pressure of air flowing
below and above the wing and is governed
by Bernoulli’s principle
Wings and Aerofoil
32. How do you design a good wing?
By proper calculation of
the wingspan , wing
loading and aspect ratios
By making a good aerofoil
By optimizing the angle
of attack to have good
lift to drag ratios
33. Angle of Attack (aoa)
This is the relative angle made by the wind with the wings
34. Angle of attack is
directly proportional to
the lift coefficient till a
maximum limit which is
generally about 17o
After which the plane
stalls
Relation between aoa & lift
37. These are the surfaces which divert the
direction of wind to provide change in
direction of flight
There are basically three types of rotation
of plane which provide the change in
direction
40. It is the ratio of the weight of the plane to
the wing area
Gives a measure of the load given per unit
area of the wing
Wing loading is an important factor which
decides the balance between the forces
Wing Loading
41. Aspect Ratio is the ratio of square of
wingspan to the area of the wing
AR = l2 / A
Where ‘l’ is the wingspan and A is the area of
wing
Typical aspect ratios for gliders are 6-8
Aspect Ratio(AR)
44. After the thrust required is calculated the
configuration of the motor is decided
The motor is selected by its KV rating which
is basically the RPM per volt it can deliver
The KV rating is calculated by max current so
while selecting a battery and ECS see to it
that continuous current rating is greater than
motor rating.
Motor specifications
45. One of the usually motors used is the 2204
motor which provides about 350 gms of thrust
The thrust provided also depends upon the
propellers used which is again specified by its
pitch and diameter length.
Typical motors
