ELECTRIC FREE FLIGHT

GENERAL

The purpose of this page is to publicise the new electric free flight class being promoted by Henk van Hoorn.

CURRENTLY THE MODEL IS OUT OF PRODUCTION PENDING THE FINALISATION OF THE COMPETITION RULES BY THE FAI. The FAI has now confirmed F1Q as a new class. Once this has settled down a re-launch of an updated model is envisaged.

The D.E.P.P.T.

P.s. Either you build your own model or you can order a ready to fly model from Henk van Hoorn (Free Flight Factory) or Mike Woodhouse (Free Flight Supplies).

Operation Manual Electric Power Model

1. General

The EPP has a timer operated motor start, motor stop, auto rudder and VIT

Motor Graupner Speed 400, 7.2 volt

Battery: 7 cells 600 mAh

Motor run 30 sec.

Flight pattern: left/left

2. Trimming

Set the stabiliser in the glide position ( upper position). Rest of the lines are not connected.

Hand launch until you have a nice flat glide and a wide left turn. :.

Trim the VlT so the stab has 1 mm down movement \ Trim the auto rudder so it has 2 mm more left

3 Test flights ( motor start in hand mode and D/T together wit motor stop)

Wind the timer fully and let it unwind until the slot in the lower disc is - 15 sec from the lower arm, and lock the timer.

Set the 3 arms ( DIT time is not important yet) Hook the rear switch line (red ) to the upper arm ( this function will start the motor in automatic mode) Hook the front switch line ( bleu) to the lower arm ( this function will stop the motor) Hook the VIT, auto rudder and D/T lines also to this lower arm Start the timer, check if it is running, and take the red line of the arm manually ( now the motor will start)

If done properly you,ll have about 10 seconds left until the motor stops.

Do not launch, but inspect the sequence of the functions.

After 10 seconds the motor should stop, stab goes to D/T and auto rudder goes to glide circle.

Repeat the procedure but this time you can launch the model gently flat to max 10 degrees up ( don't be hasty after starting the timer, a motor run of 5 to 10 sec is more then enough for the first flight )

Check the flight pattern, you should have a straight climb ( between 10 and 20 degrees) and wide left circle. lf there is a tendency to stall use more VIT.

Repeat this test until there is a nice non critical climb.

Now you can increase the motor run to 15 sec. If everything is ok you can change to automatic mode ( and 30 sec motor run)

4 Automatic mode

Wind the timer and let it unwind until the slot in the lower disc is almost at the upper arm.

Set the D/T scroll for 15 to 20 sec.

Hook all lines up ( the D/T line is now hooked to the DIT arm)

Remember to hook up the red line always first to prevent a sudden motor start.

You are now ready for a automatic start.

Release the timer, and wait for the motor to start ( 2 to 5 seconds is a good preparation time)

Launch the model after the motor has started. ( take your time for you have plenty of motor run time left)

5 Fine trimming

Use as little VIT as possible and 2 left turns in 30 sec motor run is a good figure.

The glide is a bit faster than a F 1 A model due to the greater weight of the model.

The moment the motor is stop you notice a gentle down movement, but recovery should be completed within 5 seconds.

6 Charging

Use a delta peak charger ( automatic cut off ) and set for 2 amps, and use a master dry motorcycle battery of 12volt7Ah

Initial charging time is about 30 minutes.

If charged at home, charge the battery prior to the first flight for maximum power.

Charge after each flight ( charging time is about 5 minutes)

Important: at the end of the day empty the battery by doing runs of approx. 30 sec and cooling time in between until the battery is almost empty.

Store the model.

The model is equipped with fast charge batteries. Do not attempt to charge with a slow charging device as the Ni cad batteries have a high internal resistance and you will not reach maximum capacity. A loading current of 2 to 4 times the battery capacity is needed.( 600 mA x 2 to 4 = 1.2 A to 2.4 A )

We wish you lots of fun, but be careful because the running prop of an electric power plane can be as dangerous as one from a combustion engine.

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