DX-7.... explain this!

[bodywerks]

Yep, your virtual memory took a dump. I'll bet that's what they find. You won't get a new plane out of it, but consider it a learning experience. Are you using Hitec servos and a programmer? Just curious, because you'd think that your elevators and rudders and throttles would have been a little funky, too.

[snap]

I've had this happen. I changed direction on a throttle servo when I shut the radio off it din't save the changes. What I noticed is that sometimes if I don't save my setting and then turn the radio off and back on my setting change is gone. Now it's habit check and double check all surfaces before flight.

[RappyMan]

Hey guys - this sucks - a brand new plane is in pieces. The plane was pre-flighted about 15 minutes before on the first flight. We didn't even change models - just shut off the plane & TX... flew the chopper and then fueled up the 260 and bam. I agree that catching reversed ailerons before the 2nd takeoff would have been great... but we just did it!!! If the DX-7 hadn't been malfunctioning, the crash wouldn't have happened. If you watched the vid - you saw it change aileron reverse settings after the radio was turned off and back on again. I don't think a replacement plane is out of the question. Everyone though SweetPea should have got a new plane out of XPS. I at least thought they could have stepped up to the plate and done what they could have to get things fixed. I've seen stories about DA sending out a motor to someone who was having trouble - so they could got to a contest instead of sending the motor in, waiting & waiting some more. I'm trying to keep FG here and not use the 4 letter words to describe things. I've sent in a DA-50 that had a knock start after 2 flights. They replaced/updated a bunch of stuff for free & shipped it back for free. They were fun to talk to on the phone and were great.
These were airtronics servos - no programmer or hitec servos present. All the issues seem to be in the DX-7

[3DHobbyShop]

Dude, very sorry for your loss. I own a couple of DX-7's, and have had no problems, but if I ever experience that particular problem, I expect I'll also have a crash, because in the heat of battle it is so very difficult to remember to check all the surfaces.

So, I feel for you, hope it never happens on my setups. Just curious, how old is that particular DX-7? Both of mine are looking pretty ratty...I was considering replacing them just to be sure. If yours was old, I'll replace mine. If yours was new, I'd be inclined to stick with my old ratty ones.

One thing - You are totally right about DA service, it's legendary. And, as you know, you pay extra for it. I would say that a DX-7, while it is a *very* good product IMO, is not "DA level" in radios. That would be (at least) a 9303 2.4GHz, and really more like a 12 channel. The DX-7 is a $349 sort of bargain system that works extremely well...I'd equate it to a DL engine. On those, you don't pay for DA-level service..and you don't get it.

Hope things go better next time out. Also, how did you like that airframe for the one flight?

EDIT - I see yours was over a year old. Yeah, I think I'll be replacing mine like I planned.

[bodywerks]

Herein lies the problem:
Damage Limits
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOSS OF
PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCT,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY. Further,
in no event shall the liability of Horizon exceed the individual price of the Product on which liability is asserted.
As Horizon has no control over use, setup, final assembly, modification or misuse, no liability shall be assumed
nor accepted for any resulting damage or injury. By the act of use, setup or assembly, the user accepts all
resulting liability.
If you as the Purchaser or user are not prepared to accept the liability associated with the use of this Product,
you are advised to return this Product immediately in new and unused condition to the place of purchase.
Law: These Terms are governed by Illinois law (without regard to conflict of law principals).

I copied and pasted that from the DX-7 manual...sorry for your loss.

[Jurgen Heilig]

	Quote: Originally Posted by RappyMan
	Here's the vid and pic... ... So we change it in the DX-7, turn it off & back on... the DX-7 "forgot" the change to the ailerons! Check the vid - how is this happening? ...

Model Memory #13 should never be used.

OK, let's get serious: What happens if you leave the programming mode normally, rather than just turning the tx off?

Jürgen

[KIM]

most people dont read that stuff, o well

[KIM]

most also DONT PRE FLIGHT O WELL

[KIM]

system should remember changes

[smokin]

i tell ya what.... PREFLIGHTS EVERYTIME!!!!!!!
i realize that knowing that now won't bring your rig back, but i do believe it will save future planes for you!
good luck and keep flying!

[rede2fly]

it wont matter how old the dx-7 is it would still be in warranty. they havent been out 3 years. i have been flying jr for as long as they have been on the market and never had this problem. not saying that it couldnt happen. just saying never herd of it. i'am sorry for the loss. but as others say,and as i do allways,allways, preflight. so its really hard for you to expect horizon to pay for your negligence to do your duty as the pilot,to do a preflight check. sorry but you just have to bite the bullit on this, and let it burn in the ole memory file (the brain). they will indeed be as good as da and fix the problem,if they find one for free. of this i'am shure. they are awsome to deal with. and that is why i buy as much as i can from them. i trust them they have allways done the right thing for me for the last allmost 20 years

[RappyMan]

So it's pretty much unanimous on the pre-flight check then? Ha ha! You could be president - ignore the obvious and focus on something else. There's no where I haven't agreed with: a second pre-flight before the second flight would have saved the plane. What's the reason the plane is wrecked? The DX-7 took a dump! A pre-flight would have caught this.... but the reason the plane crashed is the DX-7 forgot that we just reversed the ailerons 15 minutes ago. (A pre-flight would have caught this!!! (I'm repeating it over and over so you don't have to!))
It's also interesting that 3 others have had the same problem - out of the 500 or so that have looked at the thread. One seemed to be fixed by charging the battery, one just had to re-enter the info & not sure on the other. Spektrum (JR) is a pretty well known name - it's not a start up with unknown quality.
Does anyone know what would be required to fix the condition? What's the probablity it might happen again? Is shelving / stomping on it and getting something else the way to go? I'm hoping for some confidence in the radio again & don't want to chance something else. Thankfully the 260 just hit into a field & not something or someone. If anyone has helpful info (other than preflight (got it!)) please let know.

Thanks
Terry

[jimbomilligan]

preflight.

[KIM]

i have found that 90% off all mym accidents were do to me not doing something or checking something,so we all forget some time and then it bites ooo the other 10% was my fault also.

[RappyMan]

Okay Jim - that and the guy pointing out not to use model #13 have made me laugh. I need some of that!

It's always the pilot - that's what makes this one a bit of a mystery. I've never seen a TX do something like this before - never even heard of someone having the TX try to sabotage you. I would guess that all radios are somewhat similar & could happen to any brand. My trusty 8U has been around over 8 years & has tons of use with no issues... the DX-7 doesn't have a scratch on it and has worked perfect for about 1 year till this.