Receiver choice help...

Welcome to our Community
Wanting to join the rest of our members? Feel free to sign up today.
Register

quadfpv

New member
Feb 7, 2019
5
0
#1
Hi, I'm getting this slope plane called the weasel trek

https://www.dream-flight.com/products/weasel-TREK

It has two servos and a nimh battery like this

https://www.dream-flight.com/collec...sories/products/750mah-rx-battery-weasel-trek

I was thinking this rx would be ok with my QX7 tx but not sure if it's compatible with the glider and my QX7?

https://alofthobbies.com/frsky-v8r4-ii-4-channel-receiver.html

I also would like your suggestion regarding a rx that you think would be good?

Thanks,

Kelly
 

Wayne

Administrator
Staff member
Nov 29, 2017
1,014
132
Novato, CA USA
#2
Yes, that receiver will work, but I would like to try and talk you into this one:
https://alofthobbies.com/frsky-g-rx6.html

It is a more future proof receiver and has a ton more features like full telemetry, full range, and a built in vario. Not that you need all of those features for a Weasel, but you may want to use the receiver in your next plane too. Also, this receiver is much smaller even though it has a lot more in it. :)

-Wayne
 

quadfpv

New member
Feb 7, 2019
5
0
#3
Yes, that receiver will work, but I would like to try and talk you into this one:
https://alofthobbies.com/frsky-g-rx6.html

It is a more future proof receiver and has a ton more features like full telemetry, full range, and a built in vario. Not that you need all of those features for a Weasel, but you may want to use the receiver in your next plane too. Also, this receiver is much smaller even though it has a lot more in it. :)

-Wayne
Hi, I'm not just going to get rid of this plane and then reuse stuff, this will be permanent in this plane and will probably last me years since it's just slope flying and a very durable model. I don't need any special stuff just 4 channels for two servo's and a battery and maybe a battery voltage monitor thing so if you say this receiver https://alofthobbies.com/frsky-v8r4-ii-4-channel-receiver.html I mentioned will work fine in the weasel and my QX7 then I'd rather spend half as much...

Thanks for you reply...
 
May 31, 2018
78
10
#4
The v84RII will work with the Q-X7 but it is a short range RX and the antenna is prone to break off. It is a VII so no telemetry. You have to select the D8 protocol to use it on a Q-X7. It is only still sold because there are a lot of V and D TX modules out that cannot use D16.

The Q-X7 supports VII/D8, D16 and LR12 out of the box so there are other choices...
Note: If you are in the EU, D8 is disabled by default in EU LBT versions of the TX but can be enabled if a conversion is necessary.

If you don't mind a bit of soldering the XMR is another choice for a short range RX. It has no telemetry but it is inexpensive and low power consumption...
https://alofthobbies.com/frsky-xmr-micro-park-flyer-receiver.html

Some people also use the D4RII in small gliders because it has low power consumption...while still being full range and having telemetry. It uses D8 and is an older design so has more limited application.
https://alofthobbies.com/frsky-d4r-ii-4-8-channel-receiver-with-27ms-cppm.html

However I would probably go with the new RX4R or RX6R because they are just as small and more versatile if you want to put the RX into another plane at some point. Plus you don't need to solder on the pins vs the XMR. They have telemetry which is immediately useful for RSSI and RX battery...both good things to have.
https://alofthobbies.com/frsky-rx4r.html
https://alofthobbies.com/frsky-rx6r.html

The G-RX6 adds a Vario (altitude sensor) if that is something you want...not sure how useful it would really be for something like the Weasel though and the integrated Vario RXs have a bit of a mixed reputation for drift that the standalone varios don't seem to suffer from. Don't have any of them...just what I have read.
 

quadfpv

New member
Feb 7, 2019
5
0
#5
The v84RII will work with the Q-X7 but it is a short range RX and the antenna is prone to break off. It is a VII so no telemetry. You have to select the D8 protocol to use it on a Q-X7. It is only still sold because there are a lot of V and D TX modules out that cannot use D16.

The Q-X7 supports VII/D8, D16 and LR12 out of the box so there are other choices...
Note: If you are in the EU, D8 is disabled by default in EU LBT versions of the TX but can be enabled if a conversion is necessary.

If you don't mind a bit of soldering the XMR is another choice for a short range RX. It has no telemetry but it is inexpensive and low power consumption...
https://alofthobbies.com/frsky-xmr-micro-park-flyer-receiver.html

Some people also use the D4RII in small gliders because it has low power consumption...while still being full range and having telemetry. It uses D8 and is an older design so has more limited application.
https://alofthobbies.com/frsky-d4r-ii-4-8-channel-receiver-with-27ms-cppm.html

However I would probably go with the new RX4R or RX6R because they are just as small and more versatile if you want to put the RX into another plane at some point. Plus you don't need to solder on the pins vs the XMR. They have telemetry which is immediately useful for RSSI and RX battery...both good things to have.
https://alofthobbies.com/frsky-rx4r.html
https://alofthobbies.com/frsky-rx6r.html

The G-RX6 adds a Vario (altitude sensor) if that is something you want...not sure how useful it would really be for something like the Weasel though and the integrated Vario RXs have a bit of a mixed reputation for drift that the standalone varios don't seem to suffer from. Don't have any of them...just what I have read.
Thanks, the weasel is only meant to be flown LOS so even though it says 1km range I won't be needing more than 200-300 ft max. I really am not sitting in the future about other builds and honestly this might be my last RC endevour but I am worried that you said the antenna falls off and I read that also somewhere? I will just take the paper case off and clear heat shrink around the antenna mount and maybe the will help it stay on but crashes with slope gliders I think aren't as spectacular like electric planes or quads so I should be fine...

Here are my quad builds with a R9 rx so you can see I simplifying given quads are so freaking complicated...

https://rotorbuilds.com/profile/8247

I'd also rather not splice the +/- wires to use sbus when it's just plug the servos and battery in and go, seems much more simpler to me. I use R9M on my quads so I'm use to sbus but like you said no need with the weasel. current consumption is even half with the v8r4-11 but not sure the (ms) latency of it but thanks cause the d4r-11 that you mentioned would have been my strongest 2nd choice

Here is a video for the weasel so you can see how little it needs to just fly around...


I appreaciate your answers and thanks again...
 

Konrad

Well-known member
Jan 23, 2018
875
47
San Francisco
#6
I do fly the G-RX6 and G-RX8 and can tell you that with the new RX firmware the Vario is more stable. I don't think the issue was with its ability to sense altitude changes. But rather than guys tried to use it as an altimeter.

Full discloser; I don't like to fly with Varios' as I find them a distraction from reading how the plane is flying in the air. There is enough of a delay as to make them slow compaired to my MK-1 eyeball.

Like Wayne, I'd like to see you get a bit more than you need when it comes to radio equipment. I can say that this has saved me a lot of money in the long run.

For your weasel this RX4R should be perfect and modern. I use these in most of my foam models.
https://alofthobbies.com/frsky-rx4r.html
 
Last edited:

quadfpv

New member
Feb 7, 2019
5
0
#7
I do fly the G-RX6 and G-RX8 and can tell you that with the new RX firmware the Vario is more stable. I don't think the issue was with its ability to sense altitude changes. But rather than guys tried to use it as an altimeter.

Full discloser; I don't like to fly with Varios' as I find them a distraction from reading how the plane is flying in the air. There is enough of a delay as to make them slow compared to my MK-1 eyeball.

Like Wayne, I'd like to see you get a bit more than you need when it comes to radio equipment. I can say that this has saved my a lot of money in the long run.

For your weasel this RX4R should be perfect and modern. I use these in most of my foam models.
https://alofthobbies.com/frsky-rx4r.html
It's just a slope glider and I'll probably be within 75-200ft of the weasel and I can't afford to get other planes in the future and I have enough quads to last me a long time as do I have a FPV plane so I just wanted the bare minimum. I'll test the v84RII within it's range and see how the antenna stays put and if some bizarre reason it is problematic then I'll go with the d4r-11 but it's nice to know there are a billion Rx's to choose from which will all work and I appreciate your comments...

Thanks...
 

Wayne

Administrator
Staff member
Nov 29, 2017
1,014
132
Novato, CA USA
#8
The V8R4-II will work fine for your application. The Weasel probably will last you years of fun, that is pretty common with that ship. :)

Hope I didn't come off like I was beating you up, not at all my intention. It was just a suggestion. I really try not to up-sell people, it is just my honest opinion. One of the reasons my personal transmitter is also an X7, I really like them, and they fit my needs for slope perfectly.

Take a look at the D4R-II, it does cost a little more, but it is a rock solid performer and you will pick up that telemetry, a very nice feature, especially when you aren't sure how much voltage you have left in the weasel. :) The V8R4-II is well liked by many, but it is one of the oldest units from FrSky, and also one of our higher warranty items due to the antenna issue mentioned above.

Either way you go, I think you will be fine. :)
 

quadfpv

New member
Feb 7, 2019
5
0
#9
The V8R4-II will work fine for your application. The Weasel probably will last you years of fun, that is pretty common with that ship. :)

Hope I didn't come off like I was beating you up, not at all my intention. It was just a suggestion. I really try not to up-sell people, it is just my honest opinion. One of the reasons my personal transmitter is also an X7, I really like them, and they fit my needs for slope perfectly.

Take a look at the D4R-II, it does cost a little more, but it is a rock solid performer and you will pick up that telemetry, a very nice feature, especially when you aren't sure how much voltage you have left in the weasel. :) The V8R4-II is well liked by many, but it is one of the oldest units from FrSky, and also one of our higher warranty items due to the antenna issue mentioned above.

Either way you go, I think you will be fine. :)
Hi, thanks I thought it a good plane to start. Not sure how to get my taranis to tell me how low voltage is on the weasel with the D4R-ll but I already ordered the V8R4-ll so I'll get to experience the weasel which is 20 years old, even though I go the anniversary edition, and a really old Rx :O...lol I appreciate knowing what's the best or a better deal in the long run, just wanted to keep it simple with such a simple airplane...
 
May 31, 2018
78
10
#10
...
I'd also rather not splice the +/- wires to use sbus when it's just plug the servos and battery in and go, seems much more simpler to me. I use R9M on my quads so I'm use to sbus but like you said no need with the weasel. current consumption is even half with the v8r4-11 but not sure the (ms) latency of it but thanks cause the d4r-11 that you mentioned would have been my strongest 2nd choice

Here is a video for the weasel so you can see how little it needs to just fly around...


I appreaciate your answers and thanks again...
That was why I suggested the short range and cheaper XM as an alternative.

To be claar the XMR is a 6ch PWM receiver. There is no SBUS involved. It comes pinless for use with micro plane builds which I'll agree is annoying to have to solder up if you want pins anyway. Kinda wish they had designed it in a more conventional way with perhaps a snap off section if you didn't need the servo power bus. But they didn't....

FY I- with the D4RII the RX voltage is internally connected to the RX Bat voltage so you don't need any additional sensor for a glider. That and RSSI are built in.

For main battery voltage in a powered electric plane you can use a FBVS-01 connected to the A2 pin. You may need to calibrate the value.

https://alofthobbies.com/frsky-battery-voltage-sensor-fbvs-01.html

A2 is an analog input so you can also construct your own voltage divider to use with a specific battery type and cell count to match the level.
 
Last edited:

sawatt

New member
Oct 1, 2018
1
0
#11
You'd be surprised how far you can get a sloper away from you. I've had my Alula over 1/4 mi away. And seen the Weasel just as far away.
 

Wayne

Administrator
Staff member
Nov 29, 2017
1,014
132
Novato, CA USA
#12
@PressAllTheKnobs - Actually, the XM is a short range receiver with no telemetry and no PWM. It is intended for small craft that are using flight controllers.


I think you are referencing the XMR. I'd probably only suggest the XMR when weight and space is VERY important. On the Weasel, not important at all.

We really do need to do a big old detailed poster for all of the receivers. There are so many now, and they have such similar names it is even confusing to me at times. We have been discussing better names with FrSky, and debating better ways to present them on our web site to cut the confusion.

-Wayne
 
May 31, 2018
78
10
#13
yes. I am aware of that. It was a typo..thanks for pointing it out. I corrected it. I had suggested the XMR in my earlier post as an alternative...only because it is inexpensive and the application allowed for a shorter range RX.

On the naming I'm not sure it is that bad really... a chart would be helpful though.
 

Wayne

Administrator
Staff member
Nov 29, 2017
1,014
132
Novato, CA USA
#14
Check out all of the XSR versions now. Especially when you add in the flight controllers.

X4R, X4R-SB, X4R-SB no pin, R-X4R . All are 4 channel X series receivers. I know what they are, but a new FrSky users is going to be rather lost as to which 4 channel might be a good fit for his application.

Anyhow, all is good. We all seem to get this figured out one way or another.