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Pack the receiver in soft foam and install it on the right-hand side between switch and turbine electronics as
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shown in (Fig. 22). For this we recommend our soft receiver packing, Order No. 1665: the receiver is
packed in neoprene and fixed to the fuselage floor with Velcro tape.
Attach the receiver battery to the retaining plates (No. 33) in the front part of the fuselage using cable ties
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(No. 34a), checking once more that the model's CG is correct. In the model described in these building
instructions the receiver battery was located below the switch plate (No. 27), and the correct CG was
obtained without the addition of lead ballast.
Prepare the machined switch plate (No. 27) (Fig. 21b) to accept the Power switch harness, Order No. 3050,
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or the switch, Order No. 3046. The switch plate should be attached to the longitudinal former using two 2.9
Ø x 9.5 mm self-tapping screws (No. 50). Don't forget to drill 1.5 mm Ø pilot-holes in the longitudinal
formers to avoid splitting the material.
Programming the radio control system
Both control surfaces on each wing panel must move through the same deflections and at exactly the same
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speed in both directions.
The two elevons on each wing work identically, i.e. they both act as superimposed elevators and ailerons.
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When programming and adjusting the control surface travels it is important to ensure that they operate
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symmetrically and synchronously, i.e. if you apply up-elevator or down-elevator all four elevons (both
wings) should move through the same angle at exactly the same time. If you work carefully your model
will fly perfectly straight "hands off", without any tendency, for example, to roll when you apply up-
elevator!
Check also that the aileron travels are the same up and down.
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To set up and fine-tune the control surface travels use a setsquare and measure at the trailing edge at
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exactly the centre point each time.
Control surface travels
Elevator travel:
Aileron travel:
Rudder travel:
The stated travels apply to the Harpoon 1 only. They only apply to the Harpoon 2 if the model is flown
WITHOUT canards.
The stated control surface travels and exponential settings were found to be optimum on our test models with the
CG located at 100 mm. You may wish to alter them to suit your personal style of flying.
The thrust vectoring pipe:
The thrust vectoring pipe can be swivelled upward to enhance and amplify the model's up-elevator
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response.
The thrust vectoring pipe can be swivelled downward to enhance and amplify the model's down-elevator
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response.
The maximum travel up and down is limited by the turbine's thrust nozzle. When setting up the servo
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travels it is essential to ensure that the thrust vectoring pipe cannot contact the turbine's thrust nozzle, as
this could cause electrical "noise" and radio interference. On our models the thrust vectoring pipe is
actuated and mixed using the following method:
Assign the thrust vectoring servo to a slider channel and set the maximum possible movement of the pipe
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up and down by adjusting servo travel at the transmitter.
The trim of the thrust vectoring pipe can now be fine-tuned by adjusting the centre / neutral position of the
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servo via the slider on the transmitter.
Assign a curve mixer to a toggle switch, and mix the thrust vectoring pipe movement proportionally with
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up- and down-elevator commands. The advantage of using a curve mixer is that it enables you to adjust the
mixer ratio of the thrust pipe function independently, including exponential, simply by offsetting the curve;
this makes the model even more agile and manoeuvrable.
The zero / neutral position of the thrust pipe corresponds to the axis of the turbine.
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The advantage of thrust vectoring control is that it improves the model's general agility and
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manoeuvrability, although its primary advantage is that the take-off run can be shorter. Please note that
using the thrust vectoring system in flight does call for care and practice, and we recommend that you start
slowly and "feel your way forward" with the response of the thrust vectoring system, i.e. start by selecting
small travels and a linear mixer curve.
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Änderungen vorbehalten! Keine Haftung für Druckfehler! Ident-Nr. 0057999
04/2003
+/- 33 mm
+/- 23 mm
+/- 10 mm
)
) 25% Expo
)
68
68
Made in Thailand
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