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#engine

3 posts3 participants0 posts today
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Nielso

Dem Irrtum aufgesessen seiend, in der Werkstatt sei es noch kühl, habe ich meinen #Roland #JDXA Plastikmüllbomber, pardon, #Synthesizer repariert.

Er leidet unter dem #IC10-Problem: Ein kleiner Spannungswandler auf der grünen Platine, auf Platz IC10, überhitzt… und das Problem wird über die Jahre schlimmer. Beim letzten Konzert ist mir die Kiste über 10× mit großem Getöse live ausgestiegen.

Die neue Platine hat schlappe 553€ gekostet und wird das Problem Erfahrungsberichten zufolge etwa für 5 Jahre lösen, bis der Fehler wieder auftritt, von dem der Hersteller angeblich keine Kenntnis hat und vor allem wohl kein Bedürfnis, ihn zu beheben.

5 Jahre Zeit, mir zu überlegen, wie ich das 1,5mm große Bauteil erfolgreich ersetzen kann durch eine neue Schaltung. Fast 2000€ hat dieses Instrument vor ca. 10 Jahren gekostet.

Sicher der letzte Synth von Roland für mich. Die neueren sind nur noch Remixes der immergleichen #ZenCore #Engine und so spannend wie eingeschlafene Füße und auch in etwa so belastbar?!

Olly 👾

Building a #Stirling #Engine #Bike.

A Stirling Engine is a heat engine, powered by the expansion and contraction of a working fluid [such as air] which is heated and cooled in a cycle. In the video [Tom Stanton] begins by demonstrating the Stirling Engine with some model engines and explains the role of the displacer piston. His target power output for his bike engine is 150 watts [about 0.2 horsepower]….

youtu.be/zB3lrLjqIh4

#diy#engineer#artist
TomKrajci 🇺🇦 🏳️‍🌈 🏳️‍⚧️

Successful high power test of the glider's electric motor with the spinner and propeller installed.

I had it at full power: 4600 RPM and 150 amps at 115 volts DC. I conducted this test three times. No problems with vibrations, excessive temperature of the motor or any other components, or rapid draining of the batteries.

This is a major milestone for the electric motor system.

#AvGeek#Aviation#ElectricAircraft
Replied in thread
Æ Sea F.

@schratze #WellActually

3000 RPM is exactly the middle of the range of a standard consumer car #engine. And for combustion engines it's where they are the most efficient in terms of horsepower over fuel consumption. You don't want to put any load, even moderate acceleration on your engine at low #RPM, which is basically idling.

See. You want to accelerate, ok, moderately, but still to accelerate. You need some amount of energy for that. The energy comes from burning fuel, nothing else. So, to accelerate at a certain rate you need some volume of fuel. Now, lets shift gears the way so the engine keeps low RPM, let's say 1500 RPM, the half of 3000 to simplify the math. At 1500 it will make half the strokes per second than at 3000. But you still have to pour the same amount of fuel per second to keep up with the acceleration. So the engine is forced to burn twice as much fuel per stroke. That means more compression in the cylinder, more stress on moving parts, more heat. And more heat means more energy lost into the environment. So no, accelerating even moderately at low RPM is not efficient. That's why automatic #transmissions are configured to rev up when #acceleration is requested.

3000 RPM is louder, yes. But in this mode the engine mostly blows air through its cylinders if the load is moderate. It produces relatively less heat because it burns less fuel per stroke. Also when the transmission is on lower gear the engine endures less stress.

So, no, it's not a scream. It's a song :)

PS: Very high RPM, like at 6000 is also not most efficient but it's used for max #horsepower the engine can produce when needed (Sports Mode).

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Glitchy Pixel

Hey! I've been creating a #game #engine #framework in #vala

Its ECS based, and its called Veggies (eat your veggies!). 🥦

My reasoning for this framework is to have a game framework alternative to #csharp. I'm not liking the encroachment #microsoft has over #gamedev and #indiedev

The video is the well known bunny mark demo. Renders up to 16000 bunnies before being under 30 fps. Still needs a lot of optimization.

I'm taking ideas from frameworks like #pygame, #pine, #FNA and #excaliburjs

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Jared Stevens

Alright, I promise I'll get back to the fender flares... this project just got hot...
I got super lucky and found a blown $500 motor on FB marketplace with a HESCO ALUMINUM HEAD.

Bonus: It has roller rockers.

Machine work on the block and head is done. Going to stroke it to 4.6L and go with a Clegg's Stage 2 cam. Just gotta turn wrenches.

#jeep#jeepxj#engine
Continued thread
Y⃒̸̷̝̜̙ͥͥͥngmar

The other strimmer engine just needed a replacement fuel line, the original had gone brittle and broken.

The engine runs fine and is barely used. But the bottom half of the strimmer is missing entirely. The remaining tube is bent. Looks like it may have been left on the ground and someone drove over it.

Could get a replacement shaft and tube, but I don't really need a third strimmer.

Ideas? Make a really short strimmer for children? Attach an old propeller and use as outboard engine? Motorized flyswatter?

Maybe I'll just keep it as spare engine.

Fun fact: The shaft in the tube is a flexible one, so it works even when the tube is bent. I didn't know that.

#DIY#Repair#Strimmer
Y⃒̸̷̝̜̙ͥͥͥngmar

Fixed one of the strimmers from the pile of mowing junk the neighbours gave me.

The fuel tank was missing, but a tank from the parts box fit. It needed a new rubber grommet in the fuel tank.

These things get fuel by pressurizing the tank, so two hoses go there, pressure in and fuel out.
If the grommet doesn't seal tight, the pressure leaves through the gap and no fuel is pumped to the carb.

There was even a brand new carb for it in the box, I guess someone ordered that trying to fix it.

Then I strimmed around the house, kitchen garden and back of the sauna until I found some wild strawberries there, which I rather eat than cut 😆

Free strimmer. Well, about €0.50 in parts invested.

#DIY#Repair#Strimmer
Alex@rtnVFRmedia Suffolk UK

Because of AI slop and confusion caused by (often well-meaning) Americans on international online spaces, I was unsure if the engine on my #GolfGTI had just direct or multi point #fuelinjection

Managed to snag an official VW workshop manual and checked with my own eyes, was pleased to see the CHHA engine in my car does indeed have the extra fuel rail and injectors in the intake manifold (this is good, as #petrol sprays over the back of the intake valves and keeps then cleaner, without it they are prone to coke up and require walnut blasting)

I do not know why Americans only get engines with direct injection (into the combustion chamber), whether this is simply cost cutting by #Volkswagen of #America or some other reason..

#cars#engine#CarMaintenance
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Ivan Enderlin 🦀

Vello, github.com/linebender/vello.

Vello is a 2D graphics rendering engine written in Rust, with a focus on GPU compute. It can draw large 2D scenes with interactive or near-interactive performance, using `wgpu` for GPU access.

The more I learn about Vello, the more I'm fascinated by the number of state-of-the-art techniques that are used. It's so rich.

e.g. Fast GPU bounding boxes on tree-structured scenes, arxiv.org/abs/2205.11659

GitHubGitHub - linebender/vello: A GPU compute-centric 2D renderer.A GPU compute-centric 2D renderer. Contribute to linebender/vello development by creating an account on GitHub.
#rendering#engine#gpu
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