How to set a Throttle Cap on your Taranis

A throttle cap removes the top XX points of resolution of your throttle output and stretches the remaining top half of your stick out over the full range of your stick, improving throttle resolution in the top half and giving you many benefits that can help in racing in particular, and maybe even freestyle!
Edit: ignore the % values I throw out, the math is incorrect and not taking into account the bottom half of the stick.
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[@SickocrowAU]

-100 through 85 throttle channel is an 92.5% throttle cap. There's 100 points of resolution either side of zero. Outputs is used to cut off the unused points that your Quad won't read. As it stands your sticks actually have 2% less resolution because you haven't set them right.

[@Justinsmashh]

Video and explain to me as if I’m a child because this isn’t clicking in my head. You’re saying I have no difference in my upper throttle?

[@SickocrowAU]

Justin Skinner Sorry mate didn't mean to throw a spanner. See in the top right corner where your see the actual Nano second pulse output where you adjusted the value. That's the output the receiver puts into the quad FC. It's the same values you see on the Betaflight receiver page. Those only are read between 1000-2000us, and anything else is classed as invalid or out of range. It 'maxes out' once you got below 1000us or above 2000us.

[@Justinsmashh]

So end result is what? No response what-so-ever in the top xx% of my throttle stick range now?

[@Justinsmashh]

Does the 85 points of resolution extend to 100% of my stick range or do I just lose that 15 points of resolution and have a dead stick in that area?

[@SickocrowAU]

Justin Skinner What you doing does work, don't get me wrong. Just the math is a bit off. What I'm getting as is your end points on your pitch, roll and yaw sticks aren't sent right. At full deflection your outputting a value that maxes out, so your losing a little bit of resolution on the sticks because the full deflection area is basically wasted and ignored.

[@TMacFPV]

First time I ever heard of this and therefore have never seen anyone explain it before. More throttle res makes sense to me. Thanks for bring this up. Will give it a shot! Keep flyin' fast!

[@TMacFPV]

Justin - ok, I just tried this throttle cap thing for the first time today (at 85%) while practicing some Split S maneuvers. Results: Better altitude control and less over-corrections. Only 6 months at FPV, however, I was able to notice a significant positive stick control experience right away. Will keep working on it, but I think it may be my "Go To." Thanks! 👍

[@Justinsmashh]

Happy it’s helping you!

[@3000gtwelder]

I wish I would have saw this before I took off my Engineer X 2500Kv motors lol. I love the 2307 size, but the Kv was just to high for me, and killed the throttle resolution, not to mention a few cells in my batteries lol. I think I might put them back on now, after seeing this. I am so used to the throttle curve I get from 2306 2400 Kv I had to switch back. Great tip, thanks!

[@flowstateaerials]

This is a good tip! I haven't tried it myself, but I have noticed that there's barely any difference in speed between 100% and 85% on the stick when I'm flying. The only thing really is how much more juice it's demanding.

[@doyleadams5628]

Thanks I'm new to racing drones and your video was a game changer for me today wished I'd seen it 4 weeks ago

[@jamesonkruger6989]

This was exactly the vid I needed, been flying 4s indoors and I'm scary out of control! Thanks great video!!!

[@warehousefpv]

You should do this to your inputs instead of outputs. With outputs you are just cutting the positive side of your stick. With inputs you can "slide" the whole stick input down to get what you are describing. Basically add a -15 offset to your throttle input. This way your mid point will actually shift.

[@Justinsmashh]

Make a video and explain it. I’m not following.

[@Justinsmashh]

copy and pasting my reply to another comment, as I think it answers you as well. Too long, don't want to read? Basically, I like that it's just the top half of the stick and that the midpoint doesn't change. And paste... ok, watched all these videos and digested your words. I think I stand by what I said, numbers excluded. The overall result is the same regardless of the numbers I threw out and that's what counts. I see the weights suggestion also, but in the end i'm still seeing an increase in resolution on the top half of my sticks with this method and the whole point in the first place for me doing this was to remove that bit of potential power so I didn't accidentally bump to much throttle causing me to gain altitude. Improving resolution was a side benefit and as I see it on my radio, the top half of my stick does, in fact, stretch more, while maintaining the same midpoint. The weights method, or offset method, or whatever, looks to do similar except it seems to move midpoint down as well. This to me would mean you need more stick to hover, correct? I don't see that as a good thing, now that I've put thought into it. I just want more control in the area I'm mostly in, which is the top half of the stick. So I think this method is still the best for what I'm after. I could still be misunderstanding something, correct me if I'm wrong.

[@JohnEFly]

The most interesting part of this to me is that you say you change your throttle cap between events. I’ve seen guys doing this for over a year now, but I’ve always been too scared to try it for fear of screwing with the feel of my quad that I have memorized. Maybe I will actually go forward and test this on a track now. I’ve been able to pull quite a few sub 17s rq laps in practice. It would be really interesting to see what impact this would have... thanks for the video!

[@Justinsmashh]

Dang you got super fast dude! I saw your 7 lap run and you are smooth as butter. I can only pull 17s on the sim lol

[@TMacFPV]

Was wondering if you were going to try this out. If/when you do test this out, I'd be interested in seeing your results through a video

[@Murathanaksoz]

old but gold trick

[@Sugar_K]

Install Betaflight 3.4..go to the cli and type Set throttle_limit_type = scale Set throttle_limit = 80% ( or what ever you what ) Save And your done You can have it set up differently on your different rate profiles.. 😊

[@RossHasAdrone]

Sugar K thanks so much for this! How do I set different profiles to a switch? I’d love to switch between 4s and 6s batteries. Thanks for your help!

[@MojoPapiFPV]

Be mindful of copying this model when you setup your next quad. If you're using RF/F1 - the install wizard will compensate for the cap, so make sure to reset before you do the config. BF/BTF I believe now has a scale option that allows you to do it in software which should give you better resolution than doing it in radio. Also for freestyle/gopro setups it may be worth playing with bumping the first 0-10 percent of throttle to maybe around 25%. Since the quad needs a lot more stick to even hover, this should give you back a lot of resolution where it matters.

[@funKdatFPV]

Thats really cool! Need to try that on one of my quads.

[@EdEditz]

Thanks for this! Excellent video.

[@HomeGrownCanadianFPV]

killer tip.... awesome job brother

[@KLNYC]

THanks Justin.. Let me try this..

[@RossHasAdrone]

Thanks so much for the info! Straight to the point. Is there anyway to set this toggle to a switch? I would love to be able to switch between 4S and 6S batteries on the fly.

[@hulpe]

this fully depends on your stator size.. with a 2207 you will definitely "miss" something if you cap down the top 15%.. with smaller height stators not so much so this might make sense to cut the portion of the throttle where it tapers off anyway .. so yea.. for me, i need that juice, just in case :D

[@Justinsmashh]

Well suprisingly it worked very well on a superlight 2205 setup that comes in at 235g with props. Really helped with maintaining altitude

[@Justinsmashh]

So... I wouldn't say fully stator dependent. More pilot dependent ;)

[@hulpe]

not surprising at all^^ thats exactly what i said.. smaller stators taper off anyway so it doesnt really hur to cap them off a the top^^ but with 2207 you have more linear thrust even in the higher throtle range so it would be wasted if you cap there :P

[@MiniQuadVision]

Thanks will try that

[@warehousefpv]

Regardless keep up the great fast flying!

[@TMacFPV]

Justin-I have tried this out and I like it. Just came across this new BetaFlight "feature" today. Looks like as of BF 3.4, you can do the same thing through BF now. It sounds like it is more "user-friendly" and you can turn it ON/OFF with a switch as opposed to having to go back in to your TX. Please let me know if you believe this new BF feature does the same thing as you are describing in this video. Thanks! Check out this link which describes the BF feature: flexrc.com/2018/07/12/throttle-limit-in-betaflight-3-4-longer-flights-and-cooler-motors/

[@nerdCopter]

+1👍 thanks for the vid and commentary! I have a "curve" that is a 2-point straight line from 0 to 70. this is the same as capping off 30 correct? this is what i thought and have been flying since i started.

[@prayashshakya9770]

Useful thanks

[@revd13]

I'm def gonna give this a shot. BTW, how do you get all your quads on 1 model? subbed...

[@Justinsmashh]

Just bind a new quad to the same model! You could even have them all powered up at the same time... but don’t try to fly them lol

[@kokoblokoFPV]

true story!

[@StacemanFPV]

Interesting... Might play with that

[@StacemanFPV]

Ok tried it on my freestyle rig.. Didn't like it.. Granted the motors are only 2300kv.. I could see the appeal on race courses though with bigger motors

[@Justinsmashh]

At least you tried!

[@StacemanFPV]

Justin Skinner I'm a pincher too so I'm a bit more precise on the sticks so I think that is a factor too

[@filiprez33]

85% would be setting it to 70 bc it's -100 to 100 (0.85x200)

[@mattiaalessandroromani6370]

Hey Justin, great tip!Have you tried on other channels (ex. pitch, yaw and roll) or it might be completely unnecessary and could negatively affects the rates? Regards

[@JustinSkinnerfromdallas]

that's what your rates are for, you can control the response of roll/pitch/yaw that way!

[@mattiaalessandroromani6370]

Justin Skinner that's true.i was just wondering if you tried to add this method on top of the rates and see the result.but probably it won' t change much.thank' s

[@johndewhurst6730]

Can you do this with a futaba t10j?

[@rocket5710]

How does this affect low throttle control? Typically on a tight technical course, i find myself in the 30-45% throttle range most of the time. If I did this 85% cap would that mean that I would have to bump up my "typical cruise" throttle to about 45-60% throttle range for a tight course? Or will it be the same (30-45%)? and I just dont get the top 15% speed of the throttle?

[@Justinsmashh]

Your mid point and below is unaffected, it’s just your top half of your stick that is adjusted. There is another method if you wanted your entire stick range to change. I’m remaking this video to explain more clearly and show the other method as well

[@AmanVerma-rw9xi]

Nice tip! ^_^