Hitec Easy Star (Ready to Fly) Manuel d'utilisateur télécharger pdf (Page 23)

Fuselage

Canopy

L.H. wing

panel

Rudder

Elevator

Fin

Tailplane

Motor pod

R.H. wing

panel

Longitudinal axis

vertical axis

lateral axis

Basic information relating to model aircraft

Any aircraft, whether full-size or model, can be controlled around the three primary axes: vertical (yaw), lateral (pitch) and

longitudinal (roll).

When you operate the elevator, the model’s attitude alters around the lateral axis. If you apply a rudder command, the model

swings around the vertical axis. If you move the aileron stick, the model rolls around its longitudinal axis. As our EasyStar has

considerable wing dihedral, ailerons are not required for roll control. In this case the rudder is used both to turn the model

around the vertical axis, and also to roll it (longitudinal axis). External influences such as air turbulence may cause the model

to deviate from its intended flight path, and when this happens the pilot must control the model in such a way that it returns to

the required direction. The basic method of controlling the model’s height (altitude) is to vary motor speed (motor and propeller).

The rotational speed of the motor is usually altered by means of a speed controller. Applying up-elevator also causes the model

to gain height, but at the same time it loses speed, and this can only be continued until the model reaches its minimum

airspeed and stalls. The maximum climb angle varies according to the power available from the motor.

Wing section

The wing features a cambered airfoil section over which the

air flows when the model is flying. In a given period of time

the air flowing over the top surface of the wing has to cover a

greater distance than the air flowing under it. This causes a

reduction in pressure on the top surface, which in turn creates

a lifting force which keeps the aircraft in the air. Fig. A

Centre of Gravity (CG)

To achieve stable flying characteristics your model aircraft must

balance at a particular point, just like any other aircraft. It is

absolutely essential to check and set the correct CG position

before flying the model for the first time.

The CG position is stated as a distance which is measured

aft from the wing root leading edge, i.e. close to the fuselage.

Support the model at this point on two fingertips (or - better -

use the MPX CG gauge, # 69 3054); the model should now

hang level. Fig. B

If the model does not balance level, the installed components

(e.g. flight battery) can be re-positioned inside the fuselage. If

this is still not sufficient, attach the appropriate quantity of

trim ballast (lead or plasticene) to the fuselage nose or tail

and secure it carefully. If the model is tail-heavy, fix the ballast

at the fuselage nose; if the model is tail-heavy, attach the

ballast at the tail end of the fuselage.

The longitudinal dihedral is the difference in degrees between

the angle of incidence of the wing and of the tail. Provided

that you work carefully and attach the wing and tailplane to

the fuselage without gaps, the longitudinal dihedral will be

correct automatically.

If you are sure that both these settings (CG and longitudinal

dihedral) are correct, you can be confident that there will be

no major problems when you test-fly the model. Fig. C

Control surfaces, control surface travels

The model will only fly safely, reliably and accurately if the

control surfaces move freely and smoothly, follow the stick

movements in the correct “sense”, and move to the stated

maximum travels. The travels stated in these instructions have

been established during the test-flying programme, and we

strongly recommend that you keep to them initially. You can

always adjust them to meet your personal preferences later

on.

Transmitter controls

The transmitter features two main sticks which the pilot moves

to control the servos in the model, which in turn operate the

control surfaces.

The functions are assigned according to Mode A, although

other stick modes are possible.

The transmitter controls the control surfaces as follows:

Rudder (left / right) Fig. D

Elevator (up / down) Fig. E

Throttle (motor off / on) Fig. F

Unlike the other controls, the throttle stick must not return to

the neutral position automatically. Instead it features a ratchet

so that it stays wherever you put it. Please read the instructions

supplied with your radio control system for the method of

setting up and adjusting the transmitter and receiving system.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 43 44

Commentaires sur ces manuels

Pas de commentaire

Hitec Easy Star (Ready to Fly) Manuel d'utilisateur Page 23

Commentaires sur ces manuels

Produits connexes et manuels pour Jouets Hitec Easy Star (Ready to Fly)