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Mini flight stabilisers

What's available, what do you think

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Martin McIntosh14/07/2020 11:40:46
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3612 forum posts
1237 photos

Spent the morning playing around with these on the bench and had some fun and games.

Using a known good Orange 9ch Rx I tried a 6.6V LiFe pack. No response to the aux channel and everything sat there twitching by itself so I connected a brand new UBEC, 5V 5A which seemed a bit intermittent, in fact I believe that the metal tape screen wrapped round it was shorting something so it went in the bin. Tried a known good one with a 2s Lipo and it did not like that either, the Rx kept losing its bind. I then realised that one of the satellites was not working. Binned that and replaced it, similarly the servo connected to rudder ch was iffy. Still no response to the control ch.

Connected a large ESC in order to use the BEC and things calmed down. At last I could control the beast but there can be a delay at switch on, otherwise OK but if they are that sensitive to the type of power supply I am unsure what to do. Most of my i/c models use 2s LiFe, some on 5s NiMh, and what about an electric one where I shall have to use the BEC? Part two when I have tried one.

Denis Watkins14/07/2020 14:20:26
4655 forum posts
132 photos

5s Nimh is nearest the specified 4.5 - 6v range of an NX3 Martin

So while you practice on the bench, give it a go with the Nimh while you get used to it.

The NX3 takes its voltage from the Rx servo outputs and makes no claim to operate over 6v.

I always align front to back, where the rear of the model are your leads coming from the stab

Top/ Up is where you can read the writing and adjust the pots

Martin McIntosh14/07/2020 14:51:13
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3612 forum posts
1237 photos

A 5s NiMh fully charged will be a lot higher than 6V for quite a while. I do not have a spare one so will connect up to an existing model. Still puzzled as to why they do not like a 5V 5A UBEC. I was using 2 digi and 2 analogue servos to test them with. My mini jets which I bought them for use digi servos all round. I shall see what happens.

Martin McIntosh14/07/2020 17:11:34
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3612 forum posts
1237 photos

I was wrong about the mini jet servos, they are mixed analogue and digi. Gyro works OK on the Gnat and Hunter, but when I tried a freshly charged 6V NiMh using my test servos they just went mad. I think that I shall just put these down to experience and ditch them.

For safety on 2.4 I now never use 4.8V since a bad cell means a lost model.

Edited By Martin McIntosh on 14/07/2020 17:13:23

Ron Gray20/07/2020 08:58:43
2428 forum posts
965 photos

Just arrived in today's post, they are small! Pictured against an FrSky RX6R and a pound coin.

fullsizeoutput_15ad.jpeg

Ron Gray20/07/2020 09:08:54
2428 forum posts
965 photos

The 'obvious' drawback of these is the lack of a 2nd channel for ailerons so would probably need servo reverser plus differential would have to be manually applied rather than through Tx. Also I don't think that there is a way to alter the gain control, but I need to look into that in more detail. But for the smaller 'simpler' 'planes and as a rudder and elevator only gyro they look good. Hope to install one and try it out tomorrow evening.

Brian Cooper20/07/2020 09:56:19
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615 forum posts
27 photos

I will be the voice in the wilderness here by declaring that I do not like these electronic stabilisers. . This is based on having flown about 20 models fitted with them over the years...... not my models, but models which other people wanted me to test for them.

I find them "intrusive" at best. They soften the control responses and question every command input. Grrrrrrr. One of them, fitted to a 3D machine, would not even allow the model to raise its nose into a prop hang. Oh, no.... it put the nose back down before reaching 45 degrees... Grrrrrrr.

The worst one I experienced was a couple of weeks ago where the wretched system would not allow the controls to deflect fully to any stick inputs. . If I applied left aileron, the stabiliser questioned the command before deciding to allow a little bit of control deflection. . It was just like NANNY saying (after a short delay) "Well you have asked for left aileron but I will just let you have a little bit this time". Grrrrrrr.

The systems insist that "Nanny knows best" . . . Well, chaps, when I move a stick, I expect an instant and ACCURATE response to my inputs, right there and right then. My commands are not supposed to be a subject for discussion by an electronic Nanny.

NANNY does NOT know best. . Rip out those horrid stabilisers and FLY the models as they should be flown.

B. C.

Ron Gray20/07/2020 10:52:40
2428 forum posts
965 photos

Brian I find that they are only intrusive if not setup correctly or the right mode hasn't been selected, by you! Most also have an off function too (apart from the one at the top of this post in my Tempest). Taking the Tempest as an example, it has 2 modes, in the first it will not let the model have excessive controls but in the second you can do what you like with the sticks and the model will respond as though there isn't a gyro. However the gyro is working and is smoothing out little course deflections caused by wind gusts, which means that even in stiff cross winds that little model flies like it's on rails and is so smooth. Try doing that yourself!

Denis Watkins20/07/2020 11:25:30
4655 forum posts
132 photos
Posted by Ron Gray on 20/07/2020 10:52:40:

Brian I find that they are only intrusive if not setup correctly or the right mode hasn't been selected, by you! Most also have an off function too (apart from the one at the top of this post in my Tempest). Taking the Tempest as an example, it has 2 modes, in the first it will not let the model have excessive controls but in the second you can do what you like with the sticks and the model will respond as though there isn't a gyro. However the gyro is working and is smoothing out little course deflections caused by wind gusts, which means that even in stiff cross winds that little model flies like it's on rails and is so smooth. Try doing that yourself!

Absolutely yes

fly boy320/07/2020 11:48:17
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3783 forum posts
22 photos

Slightly off topic, due to orientation of our runway we cannot always take off into wind. Not too bad with light winds, but a bit naughty with winds above 10-15 knots. Landing obviously gives most problems at this time. Would a stab. help in these cicumstances I wonder ?

Brian Cooper20/07/2020 11:52:01
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615 forum posts
27 photos

Use them if you must, but they are not for me (in any wind conditions). 

B. C.

Edited By Brian Cooper on 20/07/2020 11:53:40

Ron Gray20/07/2020 12:17:38
2428 forum posts
965 photos

@BC - Indeed.

@FB3 - yes they can help in that situation. Plus there is a school of thought that says you can overcome tail heavy (warbird) 'planes without adding nose weight! I've not tried this but will be doing so as it intrigues me!

Mike T20/07/2020 12:20:56
582 forum posts
41 photos

Can any (or all) of the available stabilisers be set up on a 'pot' to give 0-100% intervention?

The unit in my ZOHD Dart does its job very well, but only has three settings with no scope for adjustment.

Steve J20/07/2020 12:44:37
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2101 forum posts
61 photos
Posted by Ron Gray on 20/07/2020 12:17:38:

Plus there is a school of thought that says you can overcome tail heavy (warbird) 'planes without adding nose weight! I've not tried this but will be doing so as it intrigues me!

I don't think that I would fancy a model that couldn't be flown in manual mode.

[looks at his list of airframes for one suitable for an elevator gyro test ]

 

Edited By Steve J on 20/07/2020 12:45:32

Dickw20/07/2020 12:58:43
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782 forum posts
103 photos
Posted by Steve J on 20/07/2020 12:44:37:
Posted by Ron Gray on 20/07/2020 12:17:38:

Plus there is a school of thought that says you can overcome tail heavy (warbird) 'planes without adding nose weight! I've not tried this but will be doing so as it intrigues me!

I don't think that I would fancy a model that couldn't be flown in manual mode.

[looks at his list of airframes for one suitable for an elevator gyro test ]

Edited By Steve J on 20/07/2020 12:45:32

I have a taildragger warbird (Spitfire) that in a fit of madness I fitted with a castoring tailwheel. Manoeuvring on the ground is easy, but the first attempts at take off were hilarious. The use of a gyro on rudder turned up to max damping in a "take off" flight mode solved the problem and it now takes off in a straight line.

I am sure a gyro could be used in a similar way to help fly a tail heavy model but, like Steve J, I am not sure I would want to rely on that for anything decent.

Dick

Ron Gray20/07/2020 13:00:24
2428 forum posts
965 photos

IIRC there was an article in RCM&E about this some time back and it seemed to work. I’ve got a smallish warbird that needs a bit of extra nose weight so may well give it a go.

Steve J20/07/2020 13:11:56
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2101 forum posts
61 photos

Posted by Dickw on 20/07/2020 12:58:43:

I have a taildragger warbird (Spitfire) that in a fit of madness I fitted with a castoring tailwheel. Manoeuvring on the ground is easy, but the first attempts at take off were hilarious. The use of a gyro on rudder turned up to max damping in a "take off" flight mode solved the problem and it now takes off in a straight line.

Takeoffs and landings with my ParkZone Mosquito are usually done with rate gyro on the rudder and ailerons.

I had a 30cc Yak 54 with a rudder gyro and used the rudder in heading lock for taxiing cross wind.

Denis Watkins20/07/2020 13:15:31
4655 forum posts
132 photos
Posted by Mike T on 20/07/2020 12:20:56:

Can any (or all) of the available stabilisers be set up on a 'pot' to give 0-100% intervention?

The unit in my ZOHD Dart does its job very well, but only has three settings with no scope for adjustment.

Many have pots on 3 axis Mike, so you can set up properly between 0-100%

When looking you will see 3 small circles for a tiny screwdriver on the face of the unit

Ron Gray20/07/2020 13:22:48
2428 forum posts
965 photos

There are a few such as the Eagletree Guardian that can have variable gain control set to a pot. I think, but correct me if I’m wrong, that most of the cheaper ones don’t have that feature but the more expensive ones do. The FrSky S series Rx do have that feature too.

Shaun Walsh20/07/2020 13:23:38
466 forum posts
54 photos
Posted by Dickw on 20/07/2020 12:58:43:
Posted by Steve J on 20/07/2020 12:44:37:
Posted by Ron Gray on 20/07/2020 12:17:38:

Plus there is a school of thought that says you can overcome tail heavy (warbird) 'planes without adding nose weight! I've not tried this but will be doing so as it intrigues me!

I don't think that I would fancy a model that couldn't be flown in manual mode.

[looks at his list of airframes for one suitable for an elevator gyro test ]

Edited By Steve J on 20/07/2020 12:45:32

I have a taildragger warbird (Spitfire) that in a fit of madness I fitted with a castoring tailwheel. Manoeuvring on the ground is easy, but the first attempts at take off were hilarious. The use of a gyro on rudder turned up to max damping in a "take off" flight mode solved the problem and it now takes off in a straight line.

I am sure a gyro could be used in a similar way to help fly a tail heavy model but, like Steve J, I am not sure I would want to rely on that for anything decent.

Dick

I have a Lemon stabilsed receiver in both a Hobbyking Slowpoke and a Hobbyking skipper. With the stabiliser turned off the Slowpoke will go round in circles rather than take off, turn the stabiliser on and it takes off in a straight line. Both models are much less affected by gusty conditions, in fact you can see the stabiliser correcting for crosswind gusts making it possible to fly in a wider range of wind conditions.

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