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Old 12-09-2008 | 02:17 PM
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Zeeb
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From: St George, Utah UT
Default RE: DX7 Fail safe


ORIGINAL: BuschBarber

Zeeb - I have the XP9303 with the Spektrum module. At first, I wanted the Retracts to default to UP, when there was a Failsafe event. I have since changed the default to DOWN, because every time I turn on the Tx and AR9000 Rx, the Retracts cycle, unless the default is set to DOWN.

Having the Failsafe, for Retracts, set to UP, would present a problem if you place your model on the Ground and proceed to turn on the Tx and Rx., as the gear would go UP and Down.

I am told that the system goes into Failsafe until the Rx links with the Tx, Thus, it is better to set the default Failsafe setting, for Retracts, to down.

I would prefer that if my aircraft goes into Failsafe, that the gear went up, so if it crashed, it might save the gear.
Well you've got the same issue as Andy, the manual is not real clear on what they call Failsafe.

If you read the stuff closely you can find it, but I had to look here for an answer before I was able to actually find it in the DX-7 manual. Coming from a Futaba 9Z WCII, the Spektrum programming was something of a system shock.

Basically, the manual refers to setting the failsafe after you finish setting up the model with the throttle in the desired position and normally one would do that with all the other servos set to neutral, or in the case of a retract servo to "down". This does NOT mean the servos other than the throttle will go to this position on signal loss, all it does is program the rx for where to drive the servos when first powered up and before it links with the tx. So the guys with retracts who did not do this final binding and had say the travel reversed on the retract servos, found out when they turned on the model that it would retract the gear and then when it linked with the tx the gear would extend.

Just remember to re-bind after setup or any major changes to the system like linkages, sub-trims and so on and you'll be fine...