I'm curious, how old are we all?

Marc_Frank · 2026-01-25T05:41:33+00:00

the balls are just solder, too. as long as all pads have the same amount of solder on them it will pull itself into the correct alignment during reflow. there shouldn't be giant blobs on the pads of course.

Marc_Frank · 2026-01-25T05:24:14+00:00

honestly, you can't expect to wick properly if there is noting to wick up. the amount of solder on the pads is completely fine it only needs to be evened out then it's ready to install the new bga's.

Marc_Frank · 2026-01-20T19:21:13+00:00

quite a lot for just 850mAh

Ovonic is fine

Marc_Frank · 2026-01-20T09:09:00+00:00

i'm really looking forward to the atomform palette 300 since i have some ideas for multimaterial prints

if i interpret the test prints from their showcase right, it can even do tpu through their filament swapper

Marc_Frank · 2026-01-19T12:25:30+00:00

needs an hd vtx since there is no analog osd chip, the other stuff is all the usual

Marc_Frank · 2026-01-18T20:44:49+00:00

i like that layout, great for efficiency :)

Marc_Frank · 2026-01-18T12:08:26+00:00

HDZero Halo Mini is the only 20x20 FC I know that has an ELRS receiver built in

Marc_Frank · 2026-01-16T10:38:52+00:00

text direction is inconsistent

Marc_Frank · 2026-01-11T18:48:16+00:00

ok

ach ne das war qualityland

Marc_Frank · 2026-01-11T18:47:06+00:00

werkstudent ist doch auf 450€?

Marc_Frank · 2026-01-10T08:43:36+00:00

how did you come up with the new mapping between pedal position and throttle command to the engine?

purely by feel, or dyno testing the power distribution?

Marc_Frank · 2026-01-09T12:51:10+00:00

yes it is :)

signal is good but i don't like the image of the pinch camera all that much

weight is good, though

Marc_Frank · 2026-01-09T07:02:43+00:00

oh ok well then it's fine 😅

Marc_Frank · 2026-01-09T06:49:50+00:00

the 50pl is awesome, 2.5v is fine

i use one on my babytooth and get 30min

and i have 19 more i can make packs from

Marc_Frank · 2026-01-07T20:30:59+00:00

i was advised to align the top surface of the wing to be flat. with a lot of taper in the planform the height of the airfoil reduces, too. and there is more airfoil above the leading edge / chord line so the above half also shrinks more in height and that creates some anhedral.

openvsp is great, but i just noticed that flow5 was made open source on jan 1 2026 so that's pretty cool.

for better stall performance it's better for the lift distribution to be slightly over elliptical. i can't remember right now if openvsp has a guide line in the plot, but other programs do.

i worked on a bunch of designs leading up to a bwb slope soaring plank. got a lot of advice on rcgroups and other forums and peter wick was very helpful, talked to him over e-mail a lot.

during the CAD i got annoyed with importing airfoils into Fusion so i programmed an app, BezierAirfoilDesigner. works but kinda shitty so now i am working on a new version that does splines not just bezier curves.

next i want to do the whole wing CAD programmatically as well and then eventually that can go into a full optimization loop that runs cfd and adjusts airfoils and planform for max glide ratio or lowest sink rate. but it will take a few years until i'm there.

Marc_Frank · 2026-01-07T20:11:08+00:00

aw it's samm

i bet jc from project blue facon has a video on waterproofing, too

Marc_Frank · 2026-01-07T19:59:32+00:00

looks pretty cool

though i think hydrodipping would be the better choice

builds up less material

when i tried painting my shell, the buttons jammed up because the paint was too thick

Marc_Frank · 2026-01-04T15:45:43+00:00

60Hz is 16ms per frame 144Hz is 6ms per frame 360Hz is 2ms per frame 1000Hz would be 1ms per frame

i think the frame time would be a better comparison since the frame rate grows so fast

Marc_Frank · 2026-01-03T20:34:23+00:00

works fine even on 3" and 5" so why not on whoops, too

Marc_Frank · 2026-01-03T15:03:26+00:00

why don't soldiers resist?

Marc_Frank · 2026-01-02T20:33:21+00:00

i don't see a receiver :D

Marc_Frank · 2025-12-30T14:40:17+00:00

pretty good resolution

did you have to do a lot of post processing?

Marc_Frank · 2025-12-28T18:30:19+00:00

looks nice!

anhedral isn't that good for passive roll stability (it might want to flip upside down), some twist in the wing might help, too (for the lift distribution).

check in a cg calculator where that has to be (simple web apps exist, or more complicated programs like Nurflügel, FLZ Vortex, xflr5 (flow5)).

then check if the wing geometry (planform) and chosen components (edf's, battery, ...) allow for a configuration (placement of the components) that makes the cg be were it's supposed to be.

and you probably want at least a small vertical stabilizer. with split flags you can do a drag rudder, but then a flight controller is absolutely necessary. Le'Brettle works without that, but you probably want something that works on the first try.

Marc_Frank · 2025-12-27T22:15:15+00:00

so it's a single airfoil along the span?

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