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Author Topic: Getting the best out of a TBS Discovery  (Read 234 times)

Steve W

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Getting the best out of a TBS Discovery
« on: October 28, 2018, 01:47:14 PM »

Having had a good chat with Coyote yesterday and him mentioning that he was setting up some older gear for a trainer, I got to thinking about the stuff I fly.

One thing that I barely use any more is my TBS Discovery and the reason for that is that the whole "feel" of it sucks compared to the quad that I do use, my Immersion Vortex, and the resulting footage is really bad in terms of the stability even though there's no gimbal on the smaller quad. It just feels smoother on the Vortex (because it is).

Is there any way to stabilise a larger quad? the spanner in the works is that I am using a low power system, 3s with 1038 props so it can't necessarily speed the motors up/down at the same rate as say a 4s with 8060 props. Therefore I'm not sure adjusting the gains would make that much of a difference - or will it? They're default at the moment.

One of the problems with the bigger props is that they act like sails in the wind, and it tends to make the quad "bob" whenever there's some kind of gust.

Any ideas? I'd like to use the quad - I paid enough for it back in the day after all.
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Andy Sayle

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Re: Getting the best out of a TBS Discovery
« Reply #1 on: October 28, 2018, 03:05:45 PM »

Try a 4s battery and 9x5 props.  I use the graupner e props, and mine flies pretty good.  Its never going to be as manaouvrable as a little 250, but for long distance cruising, it should be good...

What flight controller are you using?

Andy
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Duct Tape and a Hammer.  A cure for all known mechanical problems.

Steve W

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Re: Getting the best out of a TBS Discovery
« Reply #2 on: October 28, 2018, 03:06:46 PM »

Sorry, forgot to mention that - it's a Naza Lite flashed to V2
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Andy Sayle

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Re: Getting the best out of a TBS Discovery
« Reply #3 on: October 28, 2018, 03:17:47 PM »

Ah gotcha.  The Naza is always going to be the limiting factor.  Its great for what it is, but there is only so much you can do with it in terms of flying beyond just mooshing about in gps mode.

I'd try 9x5 props, 4s, and see how you go.  If you need more, then you will be looking at a new flight controller, and possibly a motor change to support 8 inch props turning at ungodly rpms!
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Duct Tape and a Hammer.  A cure for all known mechanical problems.

ched

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Re: Getting the best out of a TBS Discovery
« Reply #4 on: October 28, 2018, 03:23:02 PM »

I have a F450 with 920kv motors, 3s, 1040 props, gimbal etc with naza flashed. I found that the default gains did make it mushy. I took a win10 tablet to field and upped gains till I had oscillation then backed off a bit. I flew much better, still no 250 but it was much better than on defaults. That said I have not flown it since June 2017 which was when I built my Martian3 220  :D

So I would say take a backup of Naza settings and play with the gains. I think you can do it via tx pots if you don't have laptop/tablet.
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Coyote

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Re: Getting the best out of a TBS Discovery
« Reply #5 on: October 28, 2018, 03:40:07 PM »

I would totally agree with that approach, the Naza is default set to be instantly flyable, but needs tuning to get the best from it, but do not expect the earth :)
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English Turbines

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Re: Getting the best out of a TBS Discovery
« Reply #6 on: October 28, 2018, 07:58:16 PM »

  Hey Steve, I think you should just not waste time on it and wait for a calm day myself.

  Its surprising how far a 5 Inch quad will fly, even on a 1500mah Lipo....and they will carry a LOT more than that.

                                                                                               :vulture:
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Steve W

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Re: Getting the best out of a TBS Discovery
« Reply #7 on: October 28, 2018, 08:59:05 PM »

Yea I get it ET but at the end of the day I dropped 300 on it when it first came out and it's not entirely useless so I'd like to fly it and get some enjoyment out of it if at all possible.

Too good for the bin but not quite good enough to have fun with - I'd like to sort it.
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CurryKitten

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Re: Getting the best out of a TBS Discovery
« Reply #8 on: October 28, 2018, 10:12:22 PM »

Steve - one alternative might be to ditch Naza and try something else.  I realise that's the expensive bit, but given that you are having more fun on the IRC Vortex, perhaps it's wirth trying out a regular f3/f4 flight controller and running it as a bigger version of an acroquad (Or you could still run with a GPS and iNav if you preferred)

After talking to Painless360 and seeing some of his experiments of getting bigger quads in the air and flying as enduro machines, I thought about doing something similar with my old f450 I have sat around doing nothing.
 

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