Admiral RX600SP 6-channel DSMX with Stability Plus Gyro

[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.

[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

[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.

[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. :-(

[Cayman one]

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

[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]

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'm a Spektrum guy so I can't tell you for 100%, but as long as Futaba is using DSMX protocol, I don't see an issue.

[Cayman one]

What’s the best flap setting for takeoff and landing of the freewing AL37

[Denniswpb]

Probably best to ask that question on the AL37 forum https://www.hobbysquawk.com/forum/rc...ommercial-jets I'm sure someone there can give you great advise on it.

[OV10]

I'm a Spektrum guy so I can't tell you for 100%, but as long as Futaba is using DSMX protocol, I don't see an issue.

Futaba is NOT a DSM protocol so the answer to Cayman one, Futaba is not compatible with Spektrum/Admiral/Lemon Rx's

[Denniswpb]

Futaba is NOT a DSM protocol so the answer to Cayman one, Futaba is not compatible with Spektrum/Admiral/Lemon Rx's

Well then, there ya' go.. Like I said, I'm a Spektrum guy.

[xviper]

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

Since you are on Futaba, you need a gyro that isn't protocol specific, like the ones that are built into a receiver. For this sort of plane, you can do with something that is simple and stabilizes each axis, particularly the AIL and ELE axis and to a lesser extent, the RUD. "Best" in an individual assessment and preference. A very simple one is the HobbyEagle A3L. You can manually adjust the gains or you can set it up to be turned ON/OFF and even do master gain via a knob on your TX. Another good one, but without the ability to turn ON/OFF or have a master gain, is Freewing's own gyro. Both of these get spliced in between the RX and the servos.

[Spitfire]

Am getting ready to set-up the RX600SP in a pattern/sport plane and am concerned about the mounting of the RX in the plane. This is a low wing plane so the fuselage mounts on top of the wing. Inside the fuselage, the plywood plate for mounting things - like the receiver - would have the rx600sp upside down. I'm sure you can in-vision this. Is this ok and what problems will I in-counter?

[OV10]

Am getting ready to set-up the RX600SP in a pattern/sport plane and am concerned about the mounting of the RX in the plane. This is a low wing plane so the fuselage mounts on top of the wing. Inside the fuselage, the plywood plate for mounting things - like the receiver - would have the rx600sp upside down. I'm sure you can in-vision this. Is this ok and what problems will I in-counter?

Needs to mounted upright per the product support page update of Jan 28,2019
https://www.motionrc.com/collections...er#support-tab

This is directly from the quick start-up guide also
INSTALATION – The Admiral RX600SP must be installed on a surface that is horizontal when the model is in normal level flight attitude. The long axis of the unit must be aligned with direction of flight and the servo connectors should be to the rear of the aircraft. NOTE: It must be installed in an upright facing position.

[Spitfire]

Thanks OV10 for the reply. I've read that but was wondering if there was a way to install the unit in an ' old style pattern ' plane. I would assume this receiver will only work as a Receiver for those types of aircraft.

[OV10]

Thanks OV10 for the reply. I've read that but was wondering if there was a way to install the unit in an ' old style pattern ' plane. I would assume this receiver will only work as a Receiver for those types of aircraft.

"old style"...……….HA...…...it's a models, so make it work by configuring an appropriate mounting base for the Rx
This Rx will work in any aircraft with the correct number of channels.

[curlyculp]

Needs to mounted upright per the product support page update of Jan 28,2019
https://www.motionrc.com/collections...er#support-tab

This is directly from the quick start-up guide also
INSTALATION – The Admiral RX600SP must be installed on a surface that is horizontal when the model is in normal level flight attitude. The long axis of the unit must be aligned with direction of flight and the servo connectors should be to the rear of the aircraft. NOTE: It must be installed in an upright facing position.

I have one mounted upside down and works great. It shouldn't matter. It doesn't know up from down. All it senses is movement about the 3 axis's. (there's no such thing as 6) And the corrections can all be reversed. Just make sure it's mounted lengthwise and you should be good. Set the sensitivity of the 3 axis's to high, and simply pick it up and test it. If the counter movements are backwards, change the appropriate dip switch.

[curlyculp]

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.

I've had several shutdowns with the RX6000SP. Most were on a 6cell 70mm EDF on landing rollout. Most of those (maybe all) when the airplane left the pavement and went in the grass. Cycling the throttle cut switch brought the motor back to life. But the last one was 5 seconds after liftoff. I was able to safely deadstick it back, but haven't been able to duplicate it. I put a battery in, turn the motor one, tap the receiver, shake it, bounce the airplane up and down... nothing.

On my 90mm EDF, I had the motor quit on takeoff roll. Cycled the throttle cut and again, came back to life. Flew it and had no problem.

These are scary issues. I started a separate thread on the problem and most think it's the ESC. I'm doubting that now.

I'll get a resistance checker for the batteries.

[Chris___aviation]

Hi
I have a Spektrum DX7s and wanted to ask if anyone uses it with the Admiral RX600SP with stability plus gyro. If you do use that setup could you tell me how to setup the recovery mode?
thanks
Christoph