52% Weeks Solution Test Flight (Hempel)

[bodywerks]

	Quote: Originally Posted by JEFFRO503
	Well.....i can say one thing , and this will probably start some sort of a debate in here ( when doesn't this topic start a debate??? ) I think bill can safely say that the " 1 receiver crowd" would of lost their airplane , while the " 2 receiver crowd" ( including bill) saved their planes so they can fly again. Some people insist on sticking with the idea that receiver never ( or almost never) fail......well.......that $100.00 extra receiver just saved a multi thousand dollar aircraft. I'm only flying a 35% , so i'm staying with a single , anything larger , i would never fly it without two receiver's....my $.02

You need to re-read his posts. He already changed out the reciever and had the same problem. It has to do with something else. If anything, it proves that with added gadgets come the possibility for more problems. I 100% stand behind the assertion that the only true redundancy is a back-up plane. That's not to say that dual receivers or batteries or whatever is wrong, but neither is a single receiver, battery, etc.

[bodywerks]

	Quote: Originally Posted by Tim G
	I think this is worth repeating. Are there any Dean’s connectors in this plane, we recently had an IMAC pilot go through this. I know it doesn’t look like they could fail but they can. If the receiver is good then does that mean that landing the plane twice with only half of it working could have been prevented with one receiver? I’m not trying to smart, just a question. Tim

Very good point about the deans! I received a battery pack from a company with the Deans preinstalled. I plugged it into the charger and got, "error, no battery connected or voltage too low". Upon further inspection, I fould that they got the connector too hot during soldering and melted the plastic ever-so-slightly, putting the contact plate at a slight angle, to the point that there was only a RCH point of contact. The slightest movement of the connected plug would result in an open circuit. I think this could also happen with several other different types of plugs. Anyway, I put a new plug on it, soldered it properly, and never had a problem since.

Oh, and I agree with your second point

[Dangerous Dan]

	Quote: Originally Posted by bodywerks
	Very good point about the deans! I received a battery pack from a company with the Deans preinstalled. I plugged it into the charger and got, "error, no battery connected or voltage too low". Upon further inspection, I fould that they got the connector too hot during soldering and melted the plastic ever-so-slightly, putting the contact plate at a slight angle, to the point that there was only a RCH point of contact. The slightest movement of the connected plug would result in an open circuit. I think this could also happen with several other different types of plugs. Anyway, I put a new plug on it, soldered it properly, and never had a problem since. Oh, and I agree with your second point

look at the pics earlier in the thread no Deans

[Stu_D]

	Quote: Originally Posted by JimC-MD
	. If the Rx switching unit fails then it is game over.

LOL ,man Jim you actually made me laugh out loud . I like a bloke who can
see the forest AND the trees .

To solve any problem firstly we must make the issues as simple as possible ,
but that is the hard part .

I'm not sure if we are just making the problems harder to find rather
than easier to fix . I thought the point was to have less problems but we
seem to of ended up with more points of failure .

I was a diehard fan of single batt system until I had problem , now its dual
system in all planes . I,m sure I will change my mind about dual RX the
day I have an issue with my single RX planes .

Dont Emotec have an all in one systen that does RX switching now .
Come to think of it what about weitronic (spelling) there system does
the lot ,from servo matching to dual batt reg and dual RX .

I still think our RX are almost bullet proof and in ths case it appears to
still be the case .

Stu

[3D Trev]

	Quote: Originally Posted by Dangerous Dan
	Where was you when we had the 1 vs 2 receiver thread...LOL Nice Save. Personally I have throttle on one receiver and Choke on the other on my 42% I can kill the engine with either receiver. Did you figure out why your receiver flaked?

Dan I am changing my new Extra to this system as well.................

trev

[Dangerous Dan]

good deal

[bodywerks]

	Quote: Originally Posted by Dangerous Dan
	look at the pics earlier in the thread no Deans

I know that, which is why I said that I think this could happen with several other different types of plugs. The guy just brought up a good point...

[thewrap]

Well Bill I hope your able to work out all the bugs. I know how frustrating that can be.

[Dangerous Dan]

	Quote: Originally Posted by bodywerks
	I know that, which is why I said that I think this could happen with several other different types of plugs. The guy just brought up a good point...

You are absolutly correct after the first loss bill said he wigled the connections and it came back a connector is definatly a plase to start looking.

[Dangerous Dan]

Bill did you loose a side randomly or just after a high G-type manuever?

Was the elapsed time before loss the same both times?

Was the plane in the same position for both losses? upright vs inverted, high vs low throttle, nose up vs nose down etc...

[Tim G]

One receiver or two, I don’t claim to know the best answer. I like the power expander systems, two batteries, and two-switch set-up. It’s hard to make it bullet proof, and it seams like I am hearing of power loss to one side resulting in a crash or having to land that way. I may be over looking it, but I haven’t heard of anyone loosing the single receiver with redundant power supplies and crashing due to a truly bad receiver. I need all of my plane working, Bill doesn’t even need both wings to land. So far I’ve had more of a need for a redundant motor, fuel tank, or timer.

[Dangerous Dan]

	Quote: Originally Posted by Tim G
	Bill doesn’t even need both wings to land.

Thats funny Right there I don't care who you are

[Tim G]

It just dosen't seem fair.

[toc pilot]

	Quote: Originally Posted by Dangerous Dan
	Bill did you loose a side randomly or just after a high G-type manuever? Was the elapsed time before loss the same both times? Was the plane in the same position for both losses? upright vs inverted, high vs low throttle, nose up vs nose down etc...

I have had 3 flights on the plane. The first flight ended after 2 minutes. I went home changed receiver and crystals. 2nd flight flew for a full 8-10 minutes or so with no problems. Third flight lasted 6-7 minutes before I lost the same side of the airplane with the new receiver.

There are 4 different power/signal leads plugging into that receiver (throttle, ailerons, elevator and smoke) side that will provide power to the reciever. If there is a connector problem, there are other leads to provide the receiver power. The failure is that the receiver is loosing power OR it is just not sending the signal to the board. 2-different receivers, same problems leads me to believe the problem is with the Powerbox Champion board. Powerbox and AI belives I have 2 bad recievers. I will install the DSS system on Friday and refly the plane with the same two receivers and mount a whip antenna on the suspected bad reciever and go fly! I suspect/hope I will not have any more problems.

Anyone want to take bets?

BH

[crhammond]

	Quote: Originally Posted by toc pilot
	and mount a whip antenna on the suspected bad reciever and go fly! I suspect/hope I will not have any more problems.

Bill ... you have a gazillion times more experience than me. But just in case I'd recommend you test each Rx independantly during range tests. I'm guessing you can unplug one RX from the DDR and do your check?

I have found with my dual setups with a whip that the whip has to be mounted just right or it gets a lot less signal than a std antenna... Ideally it is 90deg to the std antenna. You'd hate to loose the other Rx and switch to the whip side only to find the whip glitches out. Most likely the non-whip side will be in use 99% of the time as the signal strength on a non-whip is normally higher. Gives you a way to compare range of the dual setup vs. single too. Normally it will be a little less.

But you probably know this already and it seems obvious... I feel kinda funny mentioning it to you...but there ya go just in case.

I'm a huge fan - can't wait to see video of your beast in the air rippin it up!