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#flutter

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TomKrajci 🇺🇦 🏳️‍🌈 🏳️‍⚧️

Glider rudders need a counterweight to be properly balanced.

What?! Aren't airplanes supposed to be light? Why add more weight?

This reduces the tendency toward flutter. (Any airplane, at a high enough speed, will flutter. Don't go that fast.)

An unbalanced rudder (or any flight control surface) will be prone to flutter at slower speeds.

1st photo shows the rudder on a bracket that allows the rudder to freely pivot. (See alt text for more discussion.)

2nd photo shows rudder oriented normally. (See alt text)

en.wikipedia.org/wiki/Aeroelas

Imagine being the test pilot here...deliberately gaining speed to get (just barely) into the flutter regime...surviving, and learning.
youtube.com/watch?v=kQI3AWpTWh

I am not using a control horn to reduce the control pressure I feel on the rudder pedals. Modern gliders typically don't need that.

en.wikipedia.org/wiki/Flight_c

en.wikipedia.org/wiki/Balanced

The rudder is free to pivot on this bracket. The counterweight mass has shifted the center of gravity a bit forward of the pivot axis, so the trailing edge swings up and the counterweight swings to the bottom. If there were no counterweight mass on this rudder, the trailing edge would drop to the lowest position. But this is not desirable, in terms of center of gravity location, to minimize vulnerability to flutter. So, we add the counterweight. But how much mass? Enough to balance the rudder on the pivot axis in a static test? Or do we need to consider other forces in a dynamic test? (See next photo....)
With the rudder oriented normally I can grab the bracket and accelerate the rudder side-to-side. That acceleration creates inertial forces...center of gravity...counterweight helping locate the C/G, etc. But we are moving through the air and that rudder has considerable surface area...so, now we are adding aerodynamic forces into this test. (The static balance test does not involve aerodynamic forces.) With the current counterweight, when I accelerate the rudder side-to-side...the heading/pointing of the rudder stays roughly constant. There is a rough balance between the aerodynamic forces that want to pivot the rudder one way, and the counterweight's forward shift of the C/G that wants to pivot the rudder the other way. Is this the correct amount of counterbalance for the rudder? For an amateur project, that is very difficult to model and predict. (It's difficult for the pro's with highly engineered designs.) Live testing in flight will be the final arbiter.
#AvGeek#Aviation#ElectricAircraft
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James Scholes

It legitimately angers me that Google claim any sort of robust #accessibility support in their half-baked #Flutter UI toolkit. From the need for users to manually enable an accessible mode in web apps, to the use of accessible names to convey role information on mobile, to a borderline unusable keyboard experience on Windows, it is a rotten mess throughout.

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Florian 'floe' Echtler

I've been teaching "Introduction to #Mobile Development" for 4th-semester students over the last years.

I've used #Android and #Java but got quite disillusioned with the Android development ecosystem (to call it a moving target would be a bit of an understatement).

So this year I tried out #Flutter, but that seems to have a rather steep learning curve for relatively inexperienced students... So off the top of your head(s), what would you recommend for this kind of course?

(Boost for reach!)

· 6 people · Closed
Public
zeyus :gopnik_implant_b:‎

But, I have done something that is super cool and I have nobody to share it with, and nothing to show for it besides some passing tests.

github.com/zeyus/liblsl.dart/b (readme is outdated, see tests)

HMU if you're a #softwareengineering , #networkengineering , #systemsarchitecture or #designpattern nerd, I'd love feedback and suggestions for improvement (or just question my sanity)

GitHubliblsl.dart/packages/liblsl at main · zeyus/liblsl.dartDart interface for Lab Streaming Layer / liblsl. Contribute to zeyus/liblsl.dart development by creating an account on GitHub.
#dart#flutter#crossplatform
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Cihat Gündüz

I am very lucky to be working as a freelancer on a project that I love & use in all my apps: #TelemetryDeck. 📡

Recently, I've had the pleasure of contributing my own ideas to the project. Today, I'm happy to introduce a new feature that's been long awaited: Duration Signals!

🔗👇 (1/2) 🧵
telemetrydeck.com/docs/article

telemetrydeck.comTrack User Engagement with Duration Signals in TelemetryDeck | TelemetryDeck
More from TelemetryDeck
#iOSDev#AndroidDev#Kotlin
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F-Droid

This week in #FDroid (TWIF) is live, but boring. Yes, the cycles run and run, yes 9 new apps are now included, yes 138 more updated. But as things go, with unattended updates, it's all background noise.

What's special? It's the week of UI rewrites:
* #Auxio got #MaterialDesign
* #BadgeMagic is now #Flutter powered
* #Spotube is now #shadcn UI themed

Enjoy: f-droid.org/2025/03/13/twif.ht

f-droid.orgFashion change - UI rewrites | F-Droid - Free and Open Source Android App RepositoryThis Week in F-DroidTWIF curated on Thursday, 13 Mar 2025, Week 11Community News@OxygenCobalt has shipped a huge 4.0.0 update with a total user interface ref...
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Medformatik | Florian

👋🏼 #introduction though I'm not new here, but moved to my #selfhosted #Mastodon instance half a year ago 📦.

I'm Florian 👨🏼‍💻, #IT/computer science student at #RWTHAachen 🇩🇪🎓 and #tech enthusiast.
I do lots of #selfhosting in my #homelab, develop apps with #Flutter 📲, but also websites 🌐 and other #software 💻.

I'm very passionate about emergency #medicine 🩺 and work as a #paramedic (Rettungssanitäter 🇩🇪) on the #ambulance 🚑 in #ems 🚨.
I love water sports, be it #sailing ⛵, #diving 🤿 or #swimming 🏊🏼‍♂️.

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Medformatik | Florian

👋🏼 Ich bin nicht #neuhier, aber vor gut 1/2 Jahr auf meine #selfhosted #Mastodon-Instanz umgezogen 📦.

Ich bin Florian 👨🏼‍💻, #Informatik|student an der #RWTHAachen 🎓 und #tech-Enthusiast.
Ich hoste vieles im #homelab #selfhosting, programmiere Apps mit #Flutter 📲, aber auch Webseiten 🌐 und andere #Software 💻.

Zudem begeistert mich die #Notfallmedizin #Medizin und ich bin als #Rettungssanitäter im #Rettungsdienst tätig 🩺🚑.
Ich liebe #Wassersport, egal ob #Segeln ⛵, #Tauchen 🤿 oder #Schwimmen 🏊🏼‍♂️.

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Phil

Flutter is fun and easy until you realize that your app contains some proprietary Google Mobile Services (GMS) stuff, because you added the "location" and/or "geolocator" package and they somehow use the Fused Location provider. Both packages however are open source.

I threw both out and found another way to implement location access with the NETWORK_LOCATION of Android instead. No more GMS stuff in the app...

I think this is all very intransparent and you never know what you really get when adding a dependency.

#Flutter#Android#Location
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popey

The #Ubuntu #Flutter community of developers is planning a desktop jam!
discourse.ubuntu.com/t/ubuntu-
discourse.ubuntu.com/t/ubuntu-

Ubuntu Community Hub · Ubuntu Flutter Community Desktop Jam (Idea)Hello, I’m sorry if I put this in the wrong place-- I’m new here. I’m from the Ubuntu Flutter Community(I think you also posted the wrong link just right click copy this one here: https://ubuntufluttercommunity.org/) and we are planning on hosting a “jam” for desktop applications built in flutter. The ides is inspired from the traditional game jam and the fact that flutter is an underutilized toolkit for desktop apps. It certainly has the potential for desktop use— we can see that with the fa...
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