Ar7100r ?

[blax1]

Guys I don't want to start a bush fire, but I'm reading some ugly stuff around the traps about this Rx :(

Anyone here had any brown outs glitches etc, a few heli-s have gone in big time just lately, with the majority of pilots saying the Rx was at fault, of course this is yet to be proven, but I thought I'd ask and see what happens here, lots of post on RR and Heli-Freak are conducting a poll on people that have had issue's.

I love the concept of this Rx, I want to run one on my new project and I do use other Spektrum gear with no problems what so ever, hopefully this will turn out to be user error with installation problems and maybe low voltage issue causing these problems.

[Rcflyin2]

Hey : I live close to horizon and get to hang out with the bench tech's. So i get to fly some of this stuff as it comes out.
With all the sectrum type receivers to bind to radio the plug actually makes it goto a low voltage state. this being stated to make a brown out your voltage is low enough to cause the receiver to go in bind mode.
now here has been the fix they have updated the code in the receivers to now do fast rebind.
The r/c car guys use a Capacitor, can be made or spectrum offers one. plugs in to extra channel.
Car stereo guys use them to keep voltage stable on amplifiers.

I am currently running this receiver and have about 20 flights on it no glitches what so ever. That i have noticed.

My setup ar7100r running a 7.4 volt li-po 2000mha . with ds 8717's on head
Now here is the neat thing this receiver has 2 output power settings with the built in regulator.
I am running the cyclic servos on 7.4 volt and this is only able to be done on the metal cased servos.
On gyro and throttle i have it running on the 5 volt outputs.
And the rev limiter is set for idle up 2 to run 83 % throttle. getting me about 2100 rpms on my head.
this was easy to setup and program.
Also this receiver can be installed with no switch, use the included extension and a bind plug on it shuts it off. this is handy as you can plug in your volt ohm meter of choice and arm heli and see actual working voltage and load against battery while moving the controls.

So far i have spectrum receivers in my heli and my gas planes. I suggest using the data logger from spectrum as well this helps you see your holds and data loss.

With any spectrum receiver make sure nothing is rashing the little antenna. Thats brought down my buddys heli when the receivers first came out. rubbed on the canopy.

Nick,
Just a noob but thats my 2 cents. :)

[blax1]

Hi Nick

Thanks for the reply, sorry it took me a while to get back. :o

Well I purchased one, I've read everything I can find about this RX and as stated the vast majority of people are having no problems what so ever, the one's that did, were due to faulty installs and low voltages, as extra insurance I also purchased another satellite antenna and a data logger just to check antenna orientations for fade out's etc and to keep an eye on things generally, looking forward to get this machine in the air, it should be awesome..:)

With regards to set up, 4x DS8717's, DS760, BLS251, all powered by Outrage 7.4 Li-po 5000mah.

Cheers Ralph

[buzzsaw]

I have the 7100R's in all my ships and not a glitch!;)

[DALEPABAJO69]

A BUDDY OF MINE TELL'S ME THAT THE SENSOR THAT READS THE RPM ON THE ENGINE FAIL'S TO OPERATE PROPERLY,AND I CHECKED IN RUNRYDER AND SAW THE SAME RESPONSE.SOME RUN IT WOTH THE SENSOR AND OTHERS DO'NT,I GOT THE SAME RECIVER AR7100R PUTTING IT ON MY NEW REX 700 W/YS91 SR,LET SEE WHAT HAPPENS:confused: IF SPEKTRUM HAS THIS PROBLEM WHY DO'NT THEY RECALL THIS STUFF?:confused: LIKE I ALLWAY'S SAY NAME BRAND IS'NT ALWAY'S THE BEST WAY.

[John 3D]

There are 2 versions of the AR7100, the plain version and the version with the RevLimit circuitry and the RPM sensor. The AR7100R is the one with the RPM sensor

[jairoblaster]

I run this RX in my Vibe 90, no glitches. I think the problems that people are having are due to not enoph batt. all spektrum RX's are very reliant on constant power. This meaning you need large decent out put batt's like a lipo. I use( 2) 2100 lipos on a Y harness that way I know I always have a good batt, if one goes bad. I have aprox 50 flights no troubles yet, as for the rev limiter, It works great. You have to turn you gear channel to I think 20 % before it will come on and activate. This is probly the cause of the trouble, or they have the gear channel reversed. good luck

[DALEPABAJO69]

2 lipo you say?well not a bad idea but a little more weigt, I'll check the gear channel see what happen's

[jairoblaster]

ya it is a bit more weight but with this heli its not an issue it flys like I could add 5 lbs to it with little difference.

[John 3D]

The 7100R has a separate power input wire with the Spectrum power connector on it. Its designed to run on a 2 cell Li-Po. I think the Spektrum Li-Po is 1500mah. That's also why the receiver has its own 5v regulator.

[jairoblaster]

I was incorrect about the gear channel what you have to do is go into you radio and switch on gov mode and that turns you gear channel to govener. make sure before you switch it that your tavel adj is +100 -100 then switch it. then you gear channel should be named gov and you can adj the overall travel to change your rev limmit. hope this helps if you tell me what radio you are using I can walk you through the menus that you need. good luck. Oh ya buy the way it is 20% to activate it the closer to 100% you get the higher the rpm will be

[rotorfreak7]

Well guys, I didn't know this until just a minute ago. There is a difference between the AR7100 and the AR7100R. I didn't know this and I just finished purchasing one on Ebay. I've still got a GV1 to use, but I was hoping to be able to access the port on the AR7100 which I thought was the same as the AR7100R. I thought the R was something that Horizon Hobby had on there site to denote the kit with the sensor. It is not just a sensor difference, but a totally different Rx. Well, I guess the good thing is that it is 2048res and can use an extra Rx for a total of 3 Rx on board the airframe. Hope this helps someone else so they don't make the same mistake. :)

[weaselbean]

Yea butt don't forget to calibrate the thro servo movement for the rev limiter!

[John 3D]

The AR7100R has a rev-limiter, the GV1 is a governor. There is a big difference. If you have a AR7100 receiver and a GV1 governor, you are actually better off than with just a AR7100R receiver. The difference is just alot of money.

It would be pointless to use an AR7100R receiver with a governor though

[rotorfreak7]

What is the difference between a Rev Limiter and a Governor?

[3D-Seth]

What is the difference between a Rev Limiter and a Governor?

rev-limiter only keeps your head speed from going over a certain amount.

Governor tries to keep your head speed in one spot. In other words, a governor will increase or decrease throttle. A Rev-limiter will only decrease it.

However, you can set a 100% flat throttle curve to keep it above the limiter, but the limiter will keep it at the right amount.

Hope this makes sense.

Seth

[jones007]

This might be a little off the current topic, but closer to the original topic. I use a 7100 in my 600ESP with a single remote antenna, and a 7100R in my 700N-SE with two remotes. I use a Spektrum data-logger on both systems, and always check voltage and data loss statistics before shutting down. On most flights (about 200 on the 600ESP) I have none to maybe a couple of packets lost during a 5 minute flight, but every now and then the logger will report 50 or 60 hits, and twice it has reported a hold, although I didn't feel the hold in flight. Presumably I was doing something boring at the time.

On the 700, again on most flights I have none to just a few packets lost, but twice now I have had one of the remote Rxs show 999 packets lost, and it was not the same remote for the two cases. I think the logger can't show larger numbers then 999, so I'm guessing that the remote just didn't work at all during the flight. In both cases, the primary Rx and the other remote had almost no losses, so there were no fads or holds, but it worries me that there is something fundamentally wrong with the setup. Has anyone else seen anything like this?

--Kevin