On this tutorial, I’ll display cut back throttle sensitivity in Betaflight in addition to on radios working EdgeTX. The following tips aren’t simply useful for learners; skilled pilots and racers may profit when flying in tight areas that require exact throttle management at slower speeds. When you’re struggling to handle altitude in your FPV drone—maybe your quad feels too highly effective, jumpy, or twitchy on throttle—this information is for you! This can be a frequent difficulty amongst learners flying in Acro mode, the place there’s no computerized altitude maintain. Fortuitously, there are efficient methods to make your throttle simpler to handle with out negatively impacting general drone efficiency.
How Throttle Scale Helps New Pilots
Throttle scaling might be particularly helpful for FPV learners. A typical FPV drone has a particularly excessive thrust-to-weight ratio, hovering round 20% to 30% throttle. Newcomers usually discover this difficult, as they’re nonetheless creating exact management, leading to issue sustaining steady altitude because of the tiny throttle stick vary they’re snug utilizing.
Advantages of lowering your drone’s throttle output:
- Reduces twitchiness and overcorrection.
- Gives finer management and elevated decision on the throttle stick.
- Helps develop muscle reminiscence for clean throttle management.
Nevertheless, relying closely on throttle scaling would possibly restrict your capability to develop as a pilot. Ideally, it is best to embrace this problem by steadily growing your throttle restrict as your abilities enhance. Finally, mastering your drone at its full 100% throttle vary is the purpose.
That stated, if extreme energy negatively impacts your enjoyment or creates frustration, throttle scaling generally is a invaluable instrument. Finally, prioritize your flying expertise and progress as a pilot, however don’t draw back from incrementally difficult your self.
Skilled pilots and racers additionally profit from throttle scaling. By lowering most throttle, you possibly can enhance precision in difficult environments, equivalent to technical race programs or tight flying areas the place most throttle isn’t wanted, however nice management is important. Throttle scaling maximizes stick decision exactly the place it issues—making it a flexible addition to your FPV toolkit.
Utilizing Throttle Scale in Betaflight
The best option to cut back drone energy and pace is thru Betaflight’s throttle scale setting:
- Go to the “PID Tuning” tab.
- On the high, swap to the “Rateprofile Settings” part.
- Discover “Throttle Restrict” and “Throttle Restrict %”.
- Within the dropdown, select “SCALE” – That is the setting you need. It scales your full throttle vary all the way down to a share.
- In Throttle Restrict (%), set it to one thing lower than 100%, like 80%. This implies full throttle in your stick will now solely command 80% motor output.
- Click on “Save”.
Betaflight affords another choice known as “CLIP”. Moderately than scaling all the throttle vary, CLIP cuts off throttle above sure share. For instance, setting CLIP to 80% means your throttle stick works usually as much as 80%, after which no extra throttle is supplied. The profit is the hover level stays the identical as earlier than, however the disadvantage is you lose throttle stick decision, doubtlessly leading to much less exact management. CLIP might be helpful in sure functions, however for many FPV pilots, SCALE is often the really helpful choice for lowering energy of your drone.
Totally different Throttle Scales per Price Profile
Betaflight helps as much as 4 separate fee profiles, every with its personal throttle scale settings. You’ll be able to swap between these profiles through the Betaflight OSD menu or assign a swap in your radio (configured in Betaflight’s Adjustment tab).
Contemplate setting completely different throttle scales for varied flying eventualities—indoor versus outside, freestyle versus racing, and so on.
Motor Output Restrict (Not Really helpful)
You could discover one other setting in Betaflight known as Motor Output Restrict below the PID Tuning tab.
I don’t advocate utilizing Motor Output Restrict to easily gradual your drone down. This setting is meant primarily for limiting motor KV to scale back ESC present or utilizing higher-voltage batteries for high-KV motors.
Unnecessarily limiting Motor Output could make your drone sluggish as a result of motors gained’t obtain full pace when required, resulting in decreased responsiveness and even instability. For basic throttle administration, Throttle Scale stays the superior and safer selection.
Throttle Expo in Betaflight
Other than throttle scaling, one other frequent technique to handle throttle sensitivity is utilizing Throttle Expo in Betaflight. Throttle Expo flattens a portion of the throttle curve across the hover/cruising level, offering finer management decision in that space, whereas nonetheless preserving 100% throttle vary.
Though this technique might be useful in sure conditions, I personally don’t advocate it for learners. Throttle Expo could make throttle response much less predictable, because the hover level might shift relying on battery voltage, propeller effectivity, and payload weight and so on. As an alternative, I strongly advocate utilizing Throttle Scale, as mentioned earlier, for extra predictable and constant throttle response.
Throttle Scaling on EdgeTX Radios
When you’re unable or want to not use Betaflight for throttle scaling, you are able to do the same factor in your EdgeTX radio. This technique is easy and is particularly helpful in case you fly a number of drones, as it might apply universally throughout fashions.
Go to Mixer in your radio. Discover the Throttle channel, maintain down the Enter button, and choose Edit.
The default Weight worth is 100 (representing 100% throttle). Scale back this to your required throttle share (e.g., 80 for 80% throttle).
Throttle channel worth begins from -100 to 100 (0% to 100%), so you need to modify the Offset worth to make sure the throttle vary begins appropriately at -100. For instance, in case you set Weight to 80 (20% lower than default), your Offset needs to be set to -20.
That’s it! Your drone will now have a scaled throttle output.
You’ll be able to even configure a knob or slider in your radio to dynamically modify throttle scaling throughout flight. This may be notably helpful for pilots steadily flying each indoors and outside or racers who want various throttle limits for various tracks.
Superior Setup: Dynamic Throttle Scaling with Potentiometer
Need to dynamically change throttle scaling on-the-fly utilizing a knob in your EdgeTX radio? Listed here are two highly effective methods to perform this: Mixer Multiplex and World Variables.
Technique 1: Mixer Multiplex
On this instance, I’ll use a knob (potentiometer) to fluctuate throttle scaling from 50% to 100%.
Within the Mixer menu, discover the throttle channel.
Insert a brand new line beneath your current throttle channel by holding down Enter and deciding on Insert After.
Edit this line, select a knob or slider because the supply, I’ll use S2 on this instance. Set Weight to 25, Offset to 75.
Scroll down in the identical web page and set Multiplex to “Multiply”.
Now add one other line below the one we simply created. Once more, choose the identical knob/slider because the supply (S2 in our instance), and set Weight to 25 and Offset to -25.
However this time you wish to choose “Add” within the Multiplex setting.
And it is best to find yourself with this:
This needs to be working now!
Lastly you possibly can setup a swap to allow/disable this function. Merely add a swap place in these two strains, so the max throttle stays at 100% and unaffected by the knob when the swap is just not lively. Do that for each *= and += strains.
To set completely different most throttle vary, like 0% to 100% as a substitute of fifty% to 100%, you solely must mess around with the Weight and Offset of the 2 strains below throttle. Listed here are two examples, 50% to 100% and 0% to 100%.
50% to 100% Max Throttle
- *= S2 Weight 25, Offset 75
- += S2 Weigh 25, Offset -25
0% to 100% Max Throttle
- *= S2 Weight 50, Offset 50
- += S2 Weight 50, Offset -50
Technique 2: World Variables
This method is extra advanced however demonstrates the flexibility and energy of EdgeTX’s World Variables (GV) function. It achieves the identical end result because the Mixer Multiplex technique however would possibly encourage different inventive setups.
Go to Inputs.
Create two new inputs. Use the identical slider or knob of your selection because the Supply. We are going to use S2 in our instance.
We are going to use the values of those inputs because the Weight and Offset of the our throttle, subsequently I title these inputs TWgt (Throttle Weight) and TOfs (Throttle Offset) respectively.
It’d sound a bit complicated now, no worries, simply hold following what I’m doing right here, it doesn’t matter what you name them so long as you recognize which is which.
And set the Weight and Offsets values in response to the diagrams beneath. These values will enable the throttle cap to alter from 50% to 100% as we flip the slider from 0% to 100%.
It is best to find yourself with 2 new inputs like this.
Now go to the Particular Operate web page.
Create two “ON” features to regulate GV1 and GV2 base on the inputs we beforehand created. What these principally do is to show the slider worth into “international variables” so we are able to entry it in this system freely;
TWgt = GV1, and TOfs = GV2.
Don’t overlook to allow these features by checking the bins on the proper.
Right here is the ultimate step. Go to the Mixer web page, and edit the Throttle channel.
Use GV1 because the Weight of the Throttle channel, and GV2 because the Offset. You’ll be able to truly do that within the Inputs Web page too, both approach is ok.
That’s it! It needs to be working now.
If you want, you possibly can assign a swap to allow/disable this function. Go to Particular Capabilities.
Assign two features to a spare swap you wish to allow/disable this function, and use “Alter GV1 100”, and “Alter GV2 0”. That is principally setting the throttle channel weight and offset within the mixer again to the default values.
To make use of completely different max throttle vary, merely mess around with Weight and Offsets within the two slider inputs. Listed here are some examples:
50% to 100% Max Throttle
- TWgt (Weight 25, Offset 75)
- TOfs (Weight 25, Offset -25)
0% to 100% Max Throttle
- TWgt (Weight 50, Offset 50)
- TOfs (Weight 50, Offset -50)
Remaining Throughs
Throttle scaling can considerably enhance your management over FPV drones, benefiting learners and skilled pilots alike. Whereas scaling through Betaflight is easy, EdgeTX radios provide versatile, dynamic strategies to swimsuit completely different flying eventualities. Experiment with these settings to search out your superb stability of responsiveness and management, enhancing your FPV flying expertise.
