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jdubg23,
You bring up a good point of discussion/reminder. I think most people know they should rebind after the plane is fully setup and trimmed out, but some of us get lazy and put it off for a while....some forget. Due to excitement of having a new plane 99% done, what we know and what we do are sometimes two different things.....I've cut some corners in the past without happy endings!!! Thanks you for including that in your post above. Gryphon |
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I don't think that I had a radio problem. I always rebind after setup and the first trim flight.
There were a number of folks watching my second takeoff, as they wanted to see this thing fly. After the crash, more than one fellow said they saw the elevon suddenly go down. I did pop the elevons up to get her vertical after takeoff. So it pitched up and then went down. I had plenty of airspeed here. There was very little altitude and it was starting to turn left. The plane hit at a nose first angle and skidded around after the nose retract broke. The outer plastic piece that the screws goes through for the hinge was pulled out. It looks to have very little glue on it. They have a tiny metal cross bar, too. These parts are very short! There is little to grab in the foam with! |
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Because it sets your fail-safe settings to be in trim. Otherwise, if the RX loses connection to the TX in flight, it will put all control surfaces to whatever they were when you originally bound (binded?) it. If the plane needed trim to pull the nose up, for example, and you didn't re-bind, the plane would nosedive if the RX lost signal in flight. Which would probably be a bad thing.
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Me, too. I've always bound once at the beginning. Have never had radio issues. I change trim almost every time I fly. Certainly these people can't be serious about having to re-bind before every flight? Is this deep seated in superstition or anal retentiveness?
Changing trim is no different than operating any of the sticks (like grossly adding and subtracting trim). Binding IDs the RX with the TX ("handshake" if you will). Once they talk the same language, it shouldn't matter what the conversation is. I may be wrong so someone please offer a technical explanation rather than "I bind after every trim change and not a single issue". |
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Just remember... however the control surfaces were (in trim, out of trim, way way out of trim) when you did the last bind, that's how the plane is gonna fly if/when it loses signal. |
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It matters to me. Call me crazy, but when my plane loses signal, I'd really prefer that the throttle be cut and control surfaces go neutral. That seems like a better situation to me than the plane nosediving into the ground, going straight up into a stall which would also result in a nosedive, making a hard turn in one direction or another, etc. But, that's just my $.02 Everybody can setup their own planes however they want.
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i was taught by someone with much more experience than i, that at least for SPEKTRUM rx's, the servos resort back to their trim position at "bind". so this is my story. got the scimitar and was imressed with the fit and finish. maidened it the next morning, first flight started off eventful. the plane needed so much up trim it was ridiculous, it bounced three times on takeoff because she kept wanting to dive! finally got her up and trimmed out, mucho up clicks maybe 1 click aileron. landed a bit hot... in my excitement to try the TV which i never turned on by the way, i failed to rebind the plane after trimming. so switched packs and tookoff again. 20ft off the deck i lose all control and she nose dives into the groundthe battery flew out, nose broke off, right wing departed airframe.... at first assessment it didnt seem so bad, a new right fin, a new spar, a new canopy, one stripped servo, and a bent motor shaft and prop/collet(like $85). horizon comped me all these parts upon learning of the disaster lol. after 10 or 12 successive flights i have since lost the TV servo and an elevon servo(another$100) i have to think due to the reduced lifespan after the imnpact. anyways... im not really sure what happened to this day, but i have just been under the assumption that i had a brownout or some other signal loss that caused her to go back to her untrimmed state and did a nosedive just like she wanted to on the maiden!!
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Last edited by jdubg23; Feb 01, 2012 at 02:09 AM.
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