Phil Brooks Posted March 14, 2011 Share Posted March 14, 2011 Everyone has their own way of keeping the throttle closed, including rubber bands around the stick and other tricks. Here's my take on solving the problem. I've applied it to my Spektrum Dx6i, but I see no reason why it shouldn't suit any transmitter with a throttle cut function. Simply add a toggle switch in parallel with the throttle cut button. When it's closed it acts as if the button is permanently depressed. I've sited mine immediately behind the button, where it's not likely to be caught accidentally. Incidentally, the switch and wires came from an old 35Mhz JR Tx that had suffered the dreaded black wire disease. The pictures are self explanatory. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted March 14, 2011 Share Posted March 14, 2011 Or simply use a free mixer to set up throttle to throttle @ 0% in one switch position, and 100% in t'other. Assign a switch as required ( flap, mix, etc and away you go ) Quote Link to comment Share on other sites More sharing options...
Phil Brooks Posted March 14, 2011 Author Share Posted March 14, 2011 Yeah, I suppose that would do it! I'd been looking for a way to use a mixer, but hadn't worked it out, so went for the hardware solution instead Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted March 14, 2011 Share Posted March 14, 2011 Its really as simple as I said - just done it on mates DX7. We set up for flaperons in wing mix ( dual ailerons ) and he wanted to isolate the throttle with a switch ( its a powered glider ) and then use the throttle stick to proportionally control the spoilerons for landing.1 x fixed mix ( wing ) and 1 x free mix and all done in few minutes. Quote Link to comment Share on other sites More sharing options...
Romeo Whisky Posted March 15, 2011 Share Posted March 15, 2011 Can't see why you would need this extra switch on a Spektrum. (Even Tim's rather unusual application above is do-able without it). If the failsafe is properly set with throttle at zero on binding the receiver won't give power to the ESC even if signal is lost or if battery is connected before TX is switched on. I find this so reliable, in my view it is much safer to power up the model and position it on the runway before switching on the TX, than to have the TX on while the model is being handled. I know this is the opposite to the rules for 35MHz, but then why not make use of the benefits of the latest technology. Most decent ESCs (all mine of various makes) also have a system for preventing the motor from inadvertently burtsing into life on power-up. When you make mods like this to your TX you invalidate the warranty and Horizon cannot be expected to help out if the TX develops any other fault, as they usually do so obligingly. Quote Link to comment Share on other sites More sharing options...
David Gilder Posted March 15, 2011 Share Posted March 15, 2011 Dosnt the DX6i have a throttle hold switch on top right rear switch already.... Surely all you have done is install a second switch to bypass the one already in place!! Or have I missed the whole point in this!!?? Quote Link to comment Share on other sites More sharing options...
andy watson Posted March 15, 2011 Share Posted March 15, 2011 I used Timbos method when I took my first foray into electricity with a little autogyro. I set the switch (on my Futaba 10C) that is usually assigned as the IC throttle cut to be an on/off switch for channel 3 (throttle). Just as an extra safety guard. Quote Link to comment Share on other sites More sharing options...
Phil Brooks Posted March 15, 2011 Author Share Posted March 15, 2011 OK, so just when you think you've invented the wheel, the local bike club rides into town I'll get me coat. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted March 15, 2011 Share Posted March 15, 2011 Posted by David Gilder on 15/03/2011 07:24:40:Dosnt the DX6i have a throttle hold switch on top right rear switch already.... Surely all you have done is install a second switch to bypass the one already in place!! Or have I missed the whole point in this!!?? No, only throttle cut ( for IC )Honestly ....the simple way is just a mix, and then you can even assign which physical switch you want to use.If there's a demand, I can post the full procedure here for both DX6i and DX7. Just ask. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted March 15, 2011 Share Posted March 15, 2011 Posted by Phil Brooks on 15/03/2011 08:41:01:OK, so just when you think you've invented the wheel, the local bike club rides into town I'll get me coat. LOL - never mind Phil, I for one admire your job, after all it does what you wanted, you thought of it yourself, DIY, and its unique Have a gold star sir Quote Link to comment Share on other sites More sharing options...
Phil Claridge Posted March 15, 2011 Share Posted March 15, 2011 gold star tim, he deserves a sticky bun at least Quote Link to comment Share on other sites More sharing options...
Phil Brooks Posted March 15, 2011 Author Share Posted March 15, 2011 No No, I don't want to be known as the guy who took a sticky bun off Tim!! Quote Link to comment Share on other sites More sharing options...
Phil Claridge Posted March 15, 2011 Share Posted March 15, 2011 it was a bun in cheek sugestion phil Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted March 15, 2011 Share Posted March 15, 2011 Very wise Phil Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted March 15, 2011 Share Posted March 15, 2011 Phil, neat idea and it saves having to use up one of the mixers. Maybe we'll start to see throttle cut on a switch for electric models, it's a good safety addition for carrying them to and from the flight line. Quote Link to comment Share on other sites More sharing options...
crispin church Posted April 25, 2011 Share Posted April 25, 2011 on my dx6i i did the 0% and 100% on thro to thro and it does nothing at all even tried -100 to +100 so what am i missing here Quote Link to comment Share on other sites More sharing options...
Alan Cantwell Posted April 25, 2011 Share Posted April 25, 2011 erm, sorry to be a killjoy, but i would take notice of the non standard mod cocking up the insurance comment, i once phoned the bmfa, to ask about fitting a rubber duck arial to the tranny, it wasnt a recognised mod, therefore, illegal boring, innit? Quote Link to comment Share on other sites More sharing options...
NigelH Posted April 25, 2011 Share Posted April 25, 2011 Posted by Phil Brooks on 15/03/2011 08:41:01: I'll get me coat. Yes, to go and buy some more switches and mount them all round the tranny, Would look extra cool Quote Link to comment Share on other sites More sharing options...
NigelH Posted April 25, 2011 Share Posted April 25, 2011 Posted by Frank Skilbeck on 15/03/2011 12:51:18: Phil, neat idea and it saves having to use up one of the mixers. Maybe we'll start to see throttle cut on a switch for electric models, it's a good safety addition for carrying them to and from the flight line. Yes, it's about time. A week ago, I was stood next to someone who was about to take his PZ Extra 300 to the flight line. He had his tranny on the neck strap and no doubt he nudged the throttle stick. At the time, he was holding the nose from the front of the model. The prop spun up and was literally slashing his wrist. I grabbed hold of the fuselage and told him twice to let go of the model before he cut the throttle and then let go. He still flew but when he came back he'd got a two inch bleeding gash across his wrist which could have been very nasty if it had gone a little deeper. That's a very torquey motor and it would not have given up. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 25, 2011 Share Posted April 25, 2011 Posted by crispin church on 25/04/2011 19:57:23:on my dx6i i did the 0% and 100% on thro to thro and it does nothing at all even tried -100 to +100 so what am i missing here I assume you remembered to assign a switch - and set the throws for each way?Works fine for me...so not sure what you have done different . Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted April 26, 2011 Share Posted April 26, 2011 Futaba FF9 (most other models similar): Advanced menu Select a free PROG. MIX Select mix "ON" MAS THRO SLV THRO LINK OFF TRIM OFF SW (a switch of your choice) POSI (direction as appropriate to activate mix as your normal "default") RATE Throttle stick low: set -100% Repeat with stick high -100% OFFSET 0% (Throttle stick low - press rotary button if it isn't already at 0% I do this with all my electric models and only activate the throttle on the flightline. There's a good case to use a similar mix with a small offset to limit throttle to tickover on IC models - especially if you use a neckstrap! Quote Link to comment Share on other sites More sharing options...
crispin church Posted April 26, 2011 Share Posted April 26, 2011 i did set the mix switch i even tried doing it on elevator and got it to work on there but would not have it on thro to thro Quote Link to comment Share on other sites More sharing options...
crispin church Posted April 26, 2011 Share Posted April 26, 2011 other forums are stating that on dx6i there a fault and thro to thro dont work so switch is a good thing if you want it well done for a great post on how to do it i say Quote Link to comment Share on other sites More sharing options...
john haz Posted April 26, 2011 Share Posted April 26, 2011 Posted by Tim Mackey - Administrator on 15/03/2011 08:41:13: Posted by David Gilder on 15/03/2011 07:24:40: If there's a demand, I can post the full procedure here for both DX6i and DX7. Just ask. I would be very interested to see that mix Tim always found it a nuisance that I can't throttle hold my planks when I use it all the time on my foodmixers. Tried it myself but it's not working as it should. Is there a way of using the aux 2 to thottle hold a plane ? cheers, John Quote Link to comment Share on other sites More sharing options...
john haz Posted April 26, 2011 Share Posted April 26, 2011 Well, i found a mix that works on the R/DR - MIX switch but have no idea why it has to be setup like this - think I need to understand mix's a bit better This works Mix : Thro→Thro, Rate -100% -100%, SW:mix, offset: -125 Why do both positions have to be -100% ?? Wouldn't a -100 or -105 offset work the same ?? Why don't spektrum let us choose the switch WE want to use instead of having to use either the flt mode or rudder DR Quote Link to comment Share on other sites More sharing options...
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