Your Tetra Is a Straightforward Model to Fly, Yet It Is Not Suited for Absolute Beginners

The Tetra EPP model reminds of the real ultralight / microlight aircraft. Its size and immense resistance to damage just provoke to fly among obstacles a real air gymkhana – simply a model to have for pure flying fun! Its ideal time comes during your holiday trip in a calm early evening. Thanks to its features it is and ideal companion for your trips!

Despite a high-wing monoplane its aerobatic characteristics are excellent. The model has all control surfaces, allowing you thusly to execute e.g. a four point hesitation roll. Its is not going to be absolutely perfect, but you’d definitely surprise your audience.

The model comes with a self-contained power unit. It is a miniature propulsion module, same as on our Astir powered glider. The propulsion unit contains all necessary components (motor, propeller hub, propeller, controller and accumulator battery).

Your Tetra is a straightforward model to fly, yet it is not suited for absolute beginners.

You will need

Transmitter 4 channel

Receivere.g. Jeti Rex 5 (8 g), Duplex R4, R5 (5 g)

Servo 3x3,6 – 5g

PROPULSION

Motor 5g

Controller AC, for currents of at least 6 A

Propeller 4,5 /4GWS, (5/4)

Accumulator -2S1P LiPol 200mAh

A list of other necessary material: contact glue, cyanocrylate glue – medium thick, connectors to accumulator batteries

A list of necessary tools: modelling knife, soldering gun, snippers...

Basic instruction for charging the accumulator battery included in the kit:

Always use the charger designed for this type of accumulator battery, with a charging voltage of 4,2V per cell!

Always use the charger with a built-in balancer, or a stand-alone balancer with a charger. Only that way you ensure the maximum charging voltage of 4,2V per cell.

The charging current is 1C. It is a current that corresponds numerically with the accumulator battery’s capacity.

The accumulator with the capacity of 200 mAh you will charge with the current of

200 mAh=0,2A.

When charging, always place the battery on a fire-proof base.

Basic information about the controller:

Setting-up the throttle.

The throttle has to be set up for each new transmitter.

Set-up procedure: switch the transmitter on with throttle at “full”, wait about 2 seconds, until a beep, beep sounds.

Retard the throttle fully, then hear a number of beeps corresponding to the number of cells in the accumulator battery. In the end sounds a long confirming tone. The throttle setup is finished.

Standard operation

Switch on the transmitter with throttle fully back, switch on the controller. A special tone sounds, the number of beeps corresponds to the number of cells in the accumulator battery. In the end sounds a long confirming tone. You can give a full throttle and fly away.

Photos :

Glue in the wing spar - 2 x glassfibre rod of 1,0 mm diameter gluing the control horns

Make the slits through the rudder and elevator

First, glue a “hub” (i.e. a plywood washer) to each side of the wheel centre

Fix the axis of the wheel spat parallel to the longitudinal axis of the fuselage

Slits for the undercarriage and for the upper undercarriage anchor plate.

Slit for the elevator push-pull (bowden) rod and its connection to the servo arm

Inserting and securing the push-pull rods (bowdens)

Making slits for the aileron push-pull rods (bowdens)

Aileron rods before gluing the wing to fuselage

Adjusting the aileron push pull rod length before gluing the wing in place

Centre of gravity: 48-44mm from the wing leading edge

Displacement (throw)

Aileron10-15mm

Elevator 8-10mm

Rudder10-15mm

Balancing the model at the flying field.

Make the last check of the correct sense of control surfaces deflection.

Launch the model into a slightly climbing flight path. Trim gently and climb to higher altitude.

Check the position for the centre of gravity thusly: Bring the model into a steady descent of about 30 degree angle (motor switched off) and neutralize the controls (return them to neutral). If the descent increases too much, the centre of gravity is too far back. Move the accumulator battery slightly forward. If the model pulls out too abruptly, the centre of gravity is too far forward. In that case move the accumulator battery towards the rear. The ideally balanced model would gently recover from the descent.

The flight path of the model is of course influenced by adjustment of the motor. If the throttle is advanced smoothly, model should not veer off the straight flight path. If it veers, offset the axis of thrust in the opposite direction.

The authors of the kit wish you plenty of fun and thrillwith your Tetra.

Telink Ltd. est distribué par TOPMODEL SAS

Le jardin d’entreprises de Sologne

F-41300 SELLES-SAINT-DENIS

List of kit parts:

1 x wing of EPP

1 x fuselage of EPP

1 x horizontal tail of EPP

1 x vertical tail of EPP

3 x window

2 x wing stiffener 500 x 1mm

2 x aileron servo push-pull rod 80 x 0,8mm

2 x push-pull rod (bowden) 280 x 0,6mm

1 x plastic tubing 20 x 0,6mm (push-pull rod safety)

2 x piano wire 0,6x 320 mm

1 x undercarriage wire

2 x undercarriage wheel spat (2 parts)

1 x plywood

2 x aileron horn

2 x horn (rudder + elevator)

3 x undercarriage attachment

1 x motor bearers

2 x wheel

4 x wheel hub

Propulsion unit

1 x AC motor with drive plate

1 x 6A AC controller

1 x LiPo 2S1P 200mAhaccumulator battery

1 x propeller

2 x screw 2,2 x 8