11-11-2011, 05:26 AM
Join Date: Apr 2008
Location: Wisconsin, USA
Thanked 569 Times in 555 Posts
Club: www.racinercclub.com (I'm the newsletter editor)
Originally Posted by bimmerland
I do have a DX7 but have not gotten thru all the programming yet. I am on my third electric. Started with a converted baby ugly stik that used to have a Cox .049 on it. My second one is an apprentice 15E and have graduated to a parkzone wildcat. When I stumbled upon the electrostik I knew it had to be my next plane. I always loved the way they flew. If I could find an old Sig Kommander I would be in seventh heaven. One of my real favorites....
The info below is not original, I found it in the Internet. Following these instructions, that makes your DX7 transmitters "Gear" switch a motor throttle kill switch. Make certain to place the throttle trim to zero, or throwing the gear/kill switch results in a minor throttle shift.
Electric Flight Safety
Ideally every electric aircraft you have should be equipped with an arming device on the craft itself (either and ESC switch or power interrupter plug) as well as having a throttle cut switch on your transmitter. Since electric motors can startup unexpectedly and inflict a lot of painful damage the double precaution can avoid some nasty injuries. Although an arming switch/plug on the aircraft ought to be sufficient on its own there are times when it is armed with the intention of flying but something distracts you and the aircraft is now vulnerable to a careless jog of the throttle lever, the transmitter becomes your last line of defense.
I have implemented a transmitter disable switch for all my aircraft (helis as well as conventional planes) this way the process is second nature to me. The idea is that whenever the aircraft is not expected to fly the transmitter switch is in the disable position. The moment before takeoff I switch it to enable, fly as required then the moment the aircraft touches down and I have completed taxiing it I always click the switch to disabled.
Some of the more advanced transmitters have the ability to set a throttle cut switch up within their menus however others need a little work to make it happen. Below I give the process needed to set up a Spektrum DX7, it is likely this technique can be used on other transmitters, it is well worth doing and if you are still unsure how try looking online for your particular transmitter.
In my case I use the switch at the top right hand corner of the transmitter as the kill switch, this seems to be a standard as far as I can tell, the DX7 does have a label saying HOLD for this switch (as well as Ruder D/R).
Setup Process For the Spektrum DX7 Transmitter:
From your selected plane setup menu (pressing scroll and select simultaneously) move to one of the mixing channels (I used Mix 3, for mixing with the gear switch - kyleservicetech).
Select source and destination for the mix to be THRO (short for throttle), the display should show:
THRO -> THRO
Now move to the rate section and set both sections to -100% (you will be able to set one of them with the throttle stick down and the other with it up).
Move to the SW: section and set it to MIX
Move to the OFFSET section and set it to -100%.
If you toggle the gear switch you should see the text to the right of the THRO -> THRO change from OFF to ON, when this reads ON the throttle is disabled (this should be with the switch pulled toward you).
Carefully try this out with your model turned on, with the switch toward you it should not be possible to start the motor at all (even helis should be disabled despite the position of the idle up switch). And, as always, check all remaining transmitter functions for both direction and unexpected operations. In case something else got changed by accident.
All that remains now is to cultivate the habit of ensuring the switch is in the disabled position whenever you pick up the aircraft and whenever it is not on the flying field.
Retired and the days are just too short, busier than ever!