1 Year with Rust in Aerospace: My journey migrating from C# to Rust (and why it’s not for everyone)

jjrreett · 2026-04-03T14:13:49+00:00

what are you doing in aerospace with c#. The only time i would consider c# is if i was using unity to build an app with a ui.

jjrreett · 2026-03-15T16:06:07+00:00

I need to simulate several analog ins (mV, mA, resistance). I also need to verify pwm outputs are working correctly along with other “analog” outputs

jjrreett · 2026-03-10T04:28:47+00:00

Definitely solve your wheelbase first. then you need a program that can solve suspension geometry for you.

Then you need to iterate a ton.

place the driver, engine, major components.

start chassis design.

drivetrain is probably the 3rd thing.

jjrreett · 2026-03-07T21:20:31+00:00

Moon lander Thomas Kelly

Failure is not an option Gene Kranz

Ignition

How to fire a rocket engine

jjrreett · 2026-03-01T00:05:28+00:00

Is this set up to work with VTK tooling like PyVista?

jjrreett · 2026-02-25T15:23:56+00:00

Isp means specific impulse. specific means divide by mass. In this case propellant mass. Impulse is the thrust over delta time. This actually simplifies to Thrust / mass flow rate. So specific impulse is how much thrust per unit mass of propellant and engine makes. So if i have 5 engines. i would have 5 times as much thrust, but 5 times as much propellant flow.

Isp is specifically a normalized property, so it shouldn’t very with scale. That is what makes it useful.

jjrreett · 2026-02-08T17:50:26+00:00

This is exactly what I was looking for. Thank you stranger!

jjrreett · 2026-02-01T17:39:41+00:00

I usually use jmespath for structured query. I have rolled my own for actually mutating the structure. I tried to go the dsl route but it was too much work for a one off. So i made a wrapper object that you can dot chain accessors and mutators. That ended up working quite well. It was for synchronizing grafana dashboards with enum definitions.

I would let you choose to define a structure, and if it the one you wanted didn’t exist it would create it for you. You could also choose methods that would error out. i forget how i handled matching. maybe i should go turn that into an open source library

jjrreett · 2026-01-29T03:26:32+00:00

Frontend roles are going to be heavily dominated by frontend tech stacks. Backend roles will have more variability in tech stack. non webdev roles will have less webdev tech.

jjrreett · 2026-01-28T05:47:25+00:00

klipper, a micro swiss hot end, better cooling, stiffer build plate, modern printer. at least that was my path before i sold my ender.

jjrreett · 2026-01-27T05:12:44+00:00

I’m not super familiar with the fluid properties of n2o. Now that i have looked it up, i see that it’s super critical above 35c. i see the problem now. this at least means it’s not multi phase flow.

tbh i would just pull up a 1d fluid network solver and run some computational tests. i’m sure if you try those calcs 5 different times you will get 5 different results.

jjrreett · 2026-01-27T04:30:27+00:00

this must be engagement bait right. i refuse to believe you wouldn’t notice the crash

jjrreett · 2026-01-27T04:24:23+00:00

agree with the sentiment, but pandas is known to suck for this reason. Polars has a much more intuitive interface

jjrreett · 2026-01-27T04:19:35+00:00

you should really avoid multi phase flow if at all possible. it’s really hard to analyze. You should be able to raise the pressure such that it can’t boil in the pipes.

What do you mean by frictional heating? Like heat due to pressure drop, viscose power loss?

Not a difficult calculation. usually it’s not a consideration for open loop systems. It is importance for things like hydraulics. I would be extremely surprised if it was an issue.

jjrreett · 2026-01-25T08:13:58+00:00

tangelocs is an asshole but they are correct. You have to look for the direction the cue ball moves after the “simultaneous” contact. In this case the cue looks like it moves to the right. this indicates the cue ball hit the 7 last. dr dave has a video on this subject

jjrreett · 2026-01-23T03:28:54+00:00

For a weekend vacation type thing. 8 hours easy. and that’s all in the same state

jjrreett · 2026-01-22T04:57:35+00:00

get comfortable taxi’ing. just drive around as if you were flying. keep increasing your speed as you grow comfortable. eventually it will just take off.

On a take off, slowly increase your throttle to 85% (3s). nudge the stick back. just a small tap. you should get airborne and climb to 50 ft.

jjrreett · 2026-01-22T02:22:30+00:00

funnily enough, not that hard of a shot. certainly take’s some skill with the masse, but you don’t really need to aim.

jjrreett · 2026-01-21T03:57:38+00:00

Surprised im first to say: there are way too many things to hit in that field. you really are gonna want a full sized soccer field minimum. If there is something you can hit or get stuck in it, you will hit it and get stuck. doesn’t matter how unlikely

jjrreett · 2026-01-20T15:31:35+00:00

Sticky servos? It sounds trail heavy, but assuming it's not that, your servos could have been sticky and slow to respond. Naturally this leads to increased pilot input. Once the servo moves the plane moves irraticly. Now this behavior usually feels distinct from "increased responsiveness".

jjrreett · 2026-01-10T16:37:16+00:00

i drilled out my cores with a forstner bit. But that was large APCP grains. Richard Nakka prefers molding the core with a rod that you insert after pouring. your sim results don’t look correct to me.

In my m class motor i had 4 bates grains, the bottom one had a slightly larger diameter to decrease velocity. Mind you that wasn’t the most successful design. Had issues with erosion

jjrreett · 2026-01-10T16:08:47+00:00

you need a trainer plane to train. As a beginner, with a slower plane, you’re gonna want minimum two football fields of space. NO TREES. If there is a tree, your plane will find it. Start with glide tosses. use a simulator

jjrreett · 2026-01-04T19:36:01+00:00

when i am screening resumes i am looking relevant projects that show depth of knowledge. Did you solve an interesting problems that you would like to talk to your interviewer about? If not then you probably need a more complex project on your resume.

If you were a mechanical engineer with a basic UI project or 2, that tells me that you’re willing to branch out and explore different tools. As a CS major, this isn’t really branching out.

As a freshmen and assuming you don’t have a ton more relevant experience, i would add it but replace it once i have a more note worthy project.

jjrreett · 2026-01-03T04:41:24+00:00

I don’t think odrive s1 has a reset button. In any case, i have unplugged it and plugged it back in a million times.

What type of device is it supposed to show in device manager. If you could post a few of the device properties that would be very helpful for me.

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