Admiral RX600SP 6-channel DSMX with Stability Plus Gyro

[Cayman one]

Thanks I’ll certainly purchase that one can you say if it’s compatible with futaba radios because that’s what I’ll be using

[Denniswpb]

I would absolutely put a RX600SP receiver with stabilization in it. Would not even think twice. Like I said in my previous post, I have never had an issue with one (except for the one that was my fault) and several of my club members also use them without issues. Just my opinion..

[Cayman one]

Can someone tell me which gyro is the best to use on my new freewing AL37 Airliner

[Denniswpb]

Check the Internal Resistance (IR) of each cell in your battery. I had a similar instance with my Admiral 5000mAh battery on my Carbon Z T-28. Right on takeoff roll, the power just dropped.. It happened twice so I took the battery out of service and checked it on my charger which will check for IR. Sure enough, one of the cell's IR was much higher than the others. New battery installed and no issues.

I have several RX600SP receivers and have not had any issues except for one. I had a significant crash with my Avanti EDF and I reused the receiver on the rebuilt Avanti after checking it all out EXCEPT for the stability. Right on lift off, it got squirrely and uncontrollable in Combo A.. Lesson learned is 1.) Don't assume the gyro is good after a crash without verifying it. 2.) Always start out in Combo C on the maiden flight of a new of repaired airplane and be able to quickly turn off stabilization in case things get out of control. As far as the Avanti, it was last seen going down in the woods and I never could find it. :-(

[Sailorman]

That’s very odd but interesting if true. I’ve got several FMS planes and leaving the ESCs in their default settings have never resulted in them shutting down like that. I’ve taken batteries down to below 20% quite often. 60% seems quite high. I think you should keep investigating as there may likely be something else going on.

Had this happen to me diagnosis was battery voltage dropping under load, when throttle was closed voltage recovered and normal operation resumed until power was applied again then voltage would drop and cause motor to cut.

[TwistedGrin]

Gents - Interesting to see motor soft shutdown issues on the Admiral receiver stabilizers......I too have suffered the exact issues on two new recent aircraft. Both of Aircraft were outfitted with 6 Hitech servos powered on 6s LiPo Castle Creation BEC's.

1. The 100amp BESC has 5amp output and a data logger that showed "Radio Signal Loss" right at the time I experienced soft motor shut down. I deployed a UBEC set up to 6.0v powered by the flight battery (6s) inserted into the Bat/Bind port. Subsequent flights seem OK without issue. I later added a Capacitor to another open channel for good measure.

2. The Talon 90amp BESC has a higher rated output voltage at 20amps but no data logger. 6 Hitech servo's powered via 6s LiPo.....this aircraft lost complete signal and nearly crashed. I deployed a UBEC set to 6.0v. STRANGE that this receiver will not power up with a Capacitor inserted in ANY open channel. Once the Capacitor is removed......everything seems normal.

This makes me very leary of the "Latest" batch of these receivers

I'll try to post up any NEW observations if I encounter any more bullet points.

TwistedGrin

[tvoydan]

No I haven't It always happens on approach. The ESCs chirps pretty loud.

My motor shutdown also happens on approach. I do NOT get any chirps from the esc. Funny thing is, after I landed (both times this happened), I can't get the motor to respond until after I return flaps to normal. After that the motor responded normally to throttle commands.

[xviper]

No I haven't It always happens on approach. The ESCs chirps pretty loud. There is at least one other member of our club that is having the same problems. He has an Eflite T-28 He flew the plane with the AS3X for over a year. He put in the Motion Rx and is having the motor fall off line intermittantly.

If indeed it’s the ESC chirps on approach, this would indicate to me that they are re-initializing just like when you first plug the battery in when starting to get ready to fly. Power is being interrupted either at the throttle lead to the RX or somewhere between the flight battery, ESC and the motor. I would trace all those lines/cables and look for loose connections, broken insulation or poor solder joints.
If this all started after changing receivers, pay more attention there. Try putting the AS3X receiver back or try an entirely different RX.

[xviper]

I think my problem comes from me not understanding the FMS escs. The default setting will shut down the motors at 60% of the battery. That is where I was having problems

That’s very odd but interesting if true. I’ve got several FMS planes and leaving the ESCs in their default settings have never resulted in them shutting down like that. I’ve taken batteries down to below 20% quite often. 60% seems quite high. I think you should keep investigating as there may likely be something else going on.

[Robbie9859901]

I think my problem comes from me not understanding the FMS escs. The default setting will shut down the motors at 60% of the battery. That is where I was having problems

[Robbie9859901]

FYI The antennas one points straight down and the other straight back.

[Robbie9859901]

No I haven't It always happens on approach. The ESCs chirps pretty loud. There is at least one other member of our club that is having the same problems. He has an Eflite T-28 He flew the plane with the AS3X for over a year. He put in the Motion Rx and is having the motor fall off line intermittantly.

[tvoydan]

I have one of these installed in my F8F. It works wonderfully. I also have a FMS Tigercat with this Rx installed. The motor randomly shuts down. 3 or 4 5 minute flights and the motor shuts down. When I get the plane to the pits, everything works perfectly.. One of our club members has one in his Efite T-28. Same intermitant operation. Any Ideas?

Robbie9859901 - Did you ever figure out your motor cut problem?

I'm experiencing the same problem on my eflite viper. Motor cuts out in flight without warning. All other servos are working fine. The couple times this happened, I was in approach for landing with flaps down so I was able to land. Very strange problem. Can't duplicate it on the bench. I actually wonder if the recvr is to close to the servo wires (it's a rat's next in the location area of the rx600sp)?

[Lrob]

I FINALLY found that the Gear Channel must be set to "I" in the Channel Assign menu.
That fixed the problem.
I still can't not find any instructions for the TX setup for my DX9.
Where did I miss that?

[Lrob]

I am trying to set up this RX. I followed the video's and written instructions.
After binding, I get only a solid green light. After pressing the bind "I" button, nothing changes.
The gyro works fine.... I think. I'm working on the bench before I install it in a plane.

What did I do wrong?

[xviper]

I don;'t have a problem starting the ESCs They always start. According to the trouble shooting chart the escs will shut the motors down, if the throttle channel goes off line for 2 seconds. The battery was 65% and is 6S.

Please explain the part in red. What indication do you have that they "start". Have you ever done the throttle calibration? If the ESC doesn't understand where zero and max throttle is, it may not see a throttle signal. The throttle signal line goes through those multi-connectors. Perhaps there's a poor contact at that location. I've also read that those wing connector boards and also have poor contacts. The throttle signal goes through those, too. I've put the dielectric grease on those pins and sockets during the build.

[Robbie9859901]

The Cat is stock. After the first time the engines shut down, I changed the BEC to a CC Pro. I thought that I had a bad BEC. That didn't help.. I don;'t have a problem starting the ESCs They always start. According to the trouble shooting chart the escs will shut the motors down, if the throttle channel goes off line for 2 seconds. The battery was 65% and is 6S. It is hard to believe that the battery voltage is low enough to stop the ESCs.

[xviper]

I have one of these installed in my F8F. It works wonderfully. I also have a FMS Tigercat with this Rx installed. The motor randomly shuts down. 3 or 4 5 minute flights and the motor shuts down. When I get the plane to the pits, everything works perfectly.. One of our club members has one in his Efite T-28. Same intermitant operation. Any Ideas?

After such a flight where the motor quits, you need to see how hot the motor and ESC is. Don't grab it in case you burn yourself. If either is very hot, it's likely overtaxed. Is everything stock? Did you change the motor or put on a pitchier prop? It could also be that the LVC (low voltage cutoff) is set too high. It could also be that the motor or ESC or both is not getting sufficient airflow for cooling.
Though not likely, it might be a loose connection at the RX on the throttle channel. Check all pins on the plug to make sure none are loose and all are seated.
Seeing how you have an FMS Tigercat, it could also be the following (I also have one): On mine, the very first flight of the day (after the plane has been in storage for some weeks, the motors/ESCs will not arm. Then I go into the control board and pull out both of those multi-connectors and vigorously wiggle them back on ensuring they are both seated thoroughly and evenly. I believe, at least with mine, the contacts in that connector might be a bit corroded and pulling them out and putting them back in "freshens" up the contact points. After I do this, no problems on subsequent flights that day. Next time, same thing. I'm going to try to inspect them very carefully on the bench at home and put a small spot of dielectric grease on each pin.
I have no specific idea about what's going on with the T-28.

[Ricky R]

I have one of these installed in my F8F. It works wonderfully. I also have a FMS Tigercat with this Rx installed. The motor randomly shuts down. 3 or 4 5 minute flights and the motor shuts down. When I get the plane to the pits, everything works perfectly.. One of our club members has one in his Efite T-28. Same intermitant operation. Any Ideas?

Can't say for sure, but symptoms like you describe are more likely linked to the ESC than the rx. See if a higher powered esc helps. Good luck.

[Robbie9859901]

I have one of these installed in my F8F. It works wonderfully. I also have a FMS Tigercat with this Rx installed. The motor randomly shuts down. 3 or 4 5 minute flights and the motor shuts down. When I get the plane to the pits, everything works perfectly.. One of our club members has one in his Efite T-28. Same intermitant operation. Any Ideas?