Spektrum SPM18000 DX18QQ User Manual download pdf (Page 15)

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You establish failsafe positions when you bind your transmitter and receiver. If the radio

signal connection is lost between the transmitter and receiver, the receiver immediately

moves the aircraft control surfaces to the failsafe positions. The Spektrum AR12120

receiver has three failsafes programming options: SmartSafe, Hold Last Command,

and Preset.

If you assign the receiver THRO channel to a transmitter channel other than throttle, we

recommend using Preset failsafe with the throttle in the low position.

NOTICE: Failsafe features vary according to receiver. Always consult the receiver

instruction manual for failsafe features.

Before ﬂ ight, ALWAYS conﬁ rm the failsafe functions as you would expect.

SmartSafe

Failsafe

SmartSafe failsafe is a technology that only acts on the throttle channel and offers

the following beneﬁ ts:

• Prevents electric motors from operating when the receiver power is on and the

transmitter power is off.

• Prevents the speed controller from arming until the throttle is moved to the low

throttle position.

• Powers off an electric motor and reduces gas/glow engines to idle if signal is lost.

To Program SmartSafe, move the throttle to the low or off position before putting the

transmitter into bind mode.

To Test the SmartSafe failsafe

1. Power the transmitter and receiver on.

2. Power off the transmitter. The throttle should immediately move to the failsafe

position.

CAUTION: Make sure the aircraft is fully restrained on the ground. If the

failsafe is not set correctly, your aircraft might advance to mid or full throttle.

Hold Last Command

The Hold Last Command failsafe maintains the last command on all channels except

throttle. If the radio signal is lost, the aircraft maintains the commanded heading until

the receiver regains signal.

To program Hold Last Command, follow the provided binding instructions in this

instruction manual.

To Test Hold Last Command

1. Power on the transmitter and receiver.

2. Move one of the control sticks to the desired Hold Last Command position and

hold the input.

3. While holding the control input (for example, a small amount of rudder) power off

the transmitter. The rudder should maintain the input command.

CAUTION: Make sure the aircraft is fully restrained on the ground. If the

failsafe is not set correctly, the aircraft throttle might advance to mid or full

throttle.

Preset Failsafe

The Preset failsafe moves all channels to their programmed failsafe positions.

We recommend using Preset failsafe to deploy spoilers on sailplanes to prevent a

ﬂ yaway if the radio signal is lost.

To program Preset failsafe:

1. Insert the bind plug in the bind port on the receiver and power on the receiver.

2. Remove the bind plug when the orange LED on the main receiver and all attached

remote receivers ﬂ ash rapidly. The orange receiver LEDs will continue ﬂ ashing.

3. Move the transmitter control sticks and switches to the desired Preset failsafe

position. Power the transmitter on.

4. Failsafe programming is complete when the orange LEDs on the transmitter and

all receivers turn solid.

CAUTION: Make sure the aircraft is fully restrained on the ground. If the

failsafe is not set correctly, the aircraft throttle might advance to mid or full

throttle.

Programming Failsafe Positions

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Spektrum SPM18000 DX18QQ User Manual Page 15

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