Using the Spektrum module using open transmitter with DSMX receivers don`t you have to rebind each time you change planes?
Bricks,
It depends on the module. The Orange Module is a PPM based module (it reads the channel positions off the radio and nothing else), so it requires a rebind. (in fairness it has 4 TX modes -- DSMx/DSM2 and 22/11ms -- and each mode can hold a single bind at one time) The Hacked Spektrum Modules and iRangeX modules are integrated with the radio, and the radio can digitally control the module's settings and binds. For those, the model match functionality (bound model will match the radio's current program ) works.
Sprzout,
I know what you mean. The stock gimbals feel rough and cheap, and in that case the M9/M7 gimbals are a serious upgrade . . . and one that doesn't have to happen right away. I have the M9's on my x9d and the feel is MUCH better. Butter smooth regardless of how stiff you set the springs. As for how difficult, the Mod was dirt simple -- open the case, unscrew/unplug the old, plug/scew-in the new, close the case. Set tension to taste.
As far as the DSMX module . . . yeah, that's not as easy. The hacked spektrum modules are the cat's meow, but if you're not into building one yourself, they can be hard to find. Takes about $20 in parts, but you do need to solder a bit, and have an old radio to harvest the TX module from. (OGnapkin -- you can harvest the TX module out of your DX6i to build one). Where you can find them, pre-built they run in the ~$70 range . . . but as I've mentioned, they're hard to find. The iRangeX module is an open project that has picked up some legs off the DeviationTx project, and you can find it fairly cheap from the Chinese cloners (~$35) -- if you open source the hardware and there's demand, they will build it. I'd get one of the latest STM versions -- those chips hold more protocols, so you're not as likely to get shortchanged out of a TX protocol you want.
OGnapkin,
As far as "what kind of things can you do on it that you cannot do on spektrum tx" . . . kinda a loaded question, let me see if I can unpack a few . . .
well to start, one radio to rule them all. With the right TX module, you can bind to nearly ANY RX. Not just the brand name on the front cover. This is something lacking in every Spektrum TX.
Next, cheap telemetry. Spektrum had telemetry first, but they squandered it -- modules were big and expensive, and only their best radios could handle it. They've gotten a bit better . . . but it's still expensive, and while most of their latest radios support it, most of their RXs do not. For the Taranis, not only can you get battery health/capacity, you can easily get altitude, GPS, airspeed . . . and a host of other data depending on the sensors you install. Some sensors are dirt cheap . . . some are not. Some you can build yourself. In most cases the battery voltage alone is all you need, but sometimes knowing how high you are can be handy . . . or how strong the TX signal is as heard by the RX . . . or your last known position . . . or . . . well, we're getting to that creativity bit. In the Spektrum radio you can have this, but it costs a good chunk more, takes up more space in your airframe and the data is for reference and warning only -- the data can be used on the Taranis to adjust the radio's behavior -- that can be powerful with the right crazy idea.
Which comes back to the Open . . . the flow of the radio programming itself lends to some serious automation. sure, flying a FT bloodywonder the default script generated program is almost overkill, but some planes aren't as simple . . .
In this case, I submit my current go-to airframe for an example . . . The full-house hand-launched competition DLG (sadly, the pilot is not that competitive, but that's not the plane's fault). Electrically, it's a simple 4 servo airframe with no powerplant (not even an ESC -- the single cell battery plugs directly into the RX and I can fly on a single 500ma pack all day). one for rudder, one for elevator, one for each aileron (separate control so flaperons can be deployed to change the wing's camber mid-flight). It normally flies with 6 different modes -- launch(for the moment before it's released), Zoom (for the climb up), thermal (rising air), cruise (neutral air), speed (sinking air) and landing (full flaps to strip the plane of energy and airspeed). from the pilot's seat, this is far from a simple plane, but oh so fun to hand toss it up, catch a thermal and soar with.
This is more than your DX6i can handle easily (trust me, I fly with a buddy who tried -- it was painful). the trim-changes between modes alone are killer, where the openTX versions make it as simple as flipping a switch . . . and now the plane flies different.
In fairness, the latest Spektrum airware has specific flight modes for these kinds of airframes, and it helps quite a bit . . . but recall how I mentioned it will "do what it expects you want easy "?
Among the community of competitive pilots (hey, I'm just having fun down int the low-scoring pilots) there are a few competing programs that do all this and include features like automatic task timing (recording your flight score according to the bizzare rule of the current round's task), launch training (reporting your latest launch height and comparing it to recent ones to give an ata-boy or do-better), flight logging (really, how high were you?!?), Quick-turn assistance (don't wait for the landing, grab the wingtip out of the air and launch it again!) . . . and if you want something different, you can program what you want.
What does the OpenTX give you that Spektrum can't? Just that -- the ability to do what you want, not just slight riffs off what the designer (clever people, but still) *Thought* you want.
Are DLGs representative of the RC flight hobby? Good gravy no. It's a cool high-performance nitch, which I think more folks would enjoy, but this kind of complexity is what you get when you push in weird directions. Sailplanes are not the only craft that benefit from this kind of power. Is every RC pilot going to need this level of power? Probably not. Most will get by.
Will you? Dunno. All depends on how creative you think you might want to be. For me, I like that my radio is a partner that works with me in flying, rather than a challenge I have to kludge around when I want to do something genuinely off the wall.