What else goes into building a jet engine? - Part 2 

Thank you! Stick it out.

I like to call it "struggle pr0n". 😎

Damn them tomatoes!

@@creativecomposites6193 LOL! :D

@@michaelblacktree 🤣🤣🤣

Yeah, watching him bumblefack around is fun for sure.

it's hard to justify them when i need twelve strange 80mm thin wall bearings that mcmaster would sell at $70 a pop. but generally they're great.

Its search function is an epic place to start regardless

McMaster Carr has lower probability of fakes or seconds due to a solid supply chain. Not everything is foolproof. But for dangerous or professional applications, I think we should use professional suppliers. For fun, safe home projects, other suppliers certainly can save money.

I won't say it justifies $179 vs $29, but remember they're a stocking distributor. It does cost money to maintain inventory, from space to warehouse it, to people to stock and pull orders, to paying taxes on unsold inventory, to SKU management. I don't know what the turnover is on any given item, but some are going to sell daily and others might sell once a year. It's this same reason that people get appalled by how much buying a car part from a dealer costs vs when it comes on the car (not talking about things like air filters, but more obscure rarely replaced parts, like dash clusters, ECUs, etc).

I loved the distilled spirits videos he made. Too bad I live in California, where beer and wine is all I’m legally allowed to make (and kombucha, too).

Great, good luck!

Well, Turbojet / Jet turbine engine science in this case, but they do rockets as well! I'd love to see them do a similar series on monoprop rocket engines. Going back nearly 15 years ago, I used to tinker with fairly simple H2O2 monoprop and Kerosene/NOS bi-prop engines. It's a fun hobby but pretty dangerous, especially when dealing with HTP (highly concentrated Peroxide, like 90%+).

@@racerex340 yes!!! 100% i think we're accidently learning rockets science. Not long ago on the channel we were treated to a full in-depth series of video on the optimum hobby firework fuel. which was awesome. also as a side note, the most concentrated 'usable' hydrogen peroxide fuel will never be above 70% (for long time). it both decays and same time is hygroscopic advancing the decay

@@Palmit_Rob, I used to buy 50% Food grade and distill to over 90% using vacuum distillation. Yes, it does decompose fairly quickly, but with the right container, you can keep 90%+ for a few weeks airtight. A cap full spilled would easily catch a lawn on fire... My monoprop engines just used simple silver screen packs as the catalyst, which would poison after a few runs but could be cleaned up by heating them cherry hot, quench in water and then run them through an isopropyl ultrasonic bath. You could make the packs last longer by weaving in platinum screen every 6 or 7 screens but that was far too expensive for what was basically me playing around.

@@racerex340 i believe you and i are agreeing :) 90%, to my small braincell, is quite a good yield, but hard to store usably for a good length of time (years would be ideal). even with special equipment. I reckon tech ingredients will slowly advance us to methane ch4, but first we will learn superchill. :)

@@Palmit_ if I had access to a really good lathe, I'd probably do HTP + nitrous oxide. Those high density rubber hybrids have great reliability, simple and can be throttled and stopped / restarted.

Thanks! It's never too late...

Good point.

It isn't and we will.

I'd use lithium as it converts neutrons into tritium. Useful stuff in fusion reactors.

@@TechIngredients Also useful in watch faces, marker lamps, and firearm sights!

Thanks!

I also ordered some of the thermal paste. Not sure what's happening but it's been months for me and I've sent them emails to no avail. Maybe they need enough orders to make a batch.

@@zmonchamp Good to know, thanks. Very disappointing though. Would at least expect some communication.

@@HansWeberHimself it's really disappointing considering not that long ago they did a video about being ethical, and not to believe in the scam products. I thought maybe they'd see this and we'd both get answers.

@@zmonchamp I’d appreciate answers a lot.

Fair enough. When we lived in Chicago, the local McMaster-Carr distributor had a UPS hub WITHIN their warehouse. Orders made by noon were delivered that same day!

It is. Propane can be used to freeze off warts and is a component in over the counter remedies.

And if freezing them off doesn't work, then you can burn them off :)

If I remember correctly it was due to High Power Density, Less Maintenance/Things to Go Wrong, and that they aren’t too picky fuel wise. I’m not an expert in the area though so feel free to chime in if you know more/have corrections or something.

@@ericlotze7724 Wow! I only knew part of that! I heard from a guy that used to drive tanks that they give them specs and settings to run every type of fuel and a few things that we wouldn't even consider fuel in those tank turbines! Thank you!

It might.

Or maybe a simple gasoline car High Pressure Fuel Pump? At lease some of those run off the camshaft so are not electric.

Those injector spray when there is a pulse, and the volume of fuel depends on the pressure. What modern common rail diesel do, it to trigger multiple times per cycle, and vary the pressure in the rail to deliver the right amount at the right time, so it runs as efficient as possible with "little bad stuff". A PWM signal is not what you need, it is the frequency. Also note that the coils based injectors (old) require quite a good current pulse, and the more modern piezo ones require a a good voltage kick (100~200V) so the drivers need to be pretty on point too.

In plumbing, we do the same thing with a hammer arrestor!

I love this video, knowledge is key to science!

The likelihood is very low, but yes there certainly is an explosion risk. That’s why all accumulators are charged with nitrogen or other inert gases. It would be as simple as putting a schrader valve on top of the metal pipe and filling it with nitrogen.

The injector from a pistons ICE will not work. They need pressure pulses that trigger the injection. If it is electronic, the electric pulses trigger, but it is basically a fuel volume per pulse, depends on pressure. If it is mechanic, you need the pump to create the pulses, even more complicated and still pulsed.

Working on it.🙂

That's right. Afterburners should always be an "afterthought". The secret is compression ratio and you need multiple stages for that.

Not necessarily , if the gas producer iand afterburner are constructed correctly and the required turbine temps are used , we can achieved a choked afterburner nozzle , unfortunately this guy doesn't really know what he's talking about , he sprouts the words but not the experience

It's unnecessarily complex and bulky when fuels like kerosene work well.

Especially with the Turboshaft version connected to a generator (and maybe even a Heat Recovery Steam Generator!) you could convert waste engine oil/pyrolysis oil into not just heat, like a waste oil burner, but electricity!

You might find our video on mixing nitrous and rockets useful.

Use technology to measure and record the volume levels as well as the time this occurs during the day. Get unimpeachable documentation, witnesses and a record of your interaction then go to the police and lay this out. If you're position is justified, they're more likely to help when you seem reasonable and organized. Escalating will do the opposite and you risk the police acting in your neighbor's defense.

The Jet Engines that “Gravity Industries” or LLC or whatever the name is are Commercial Off The Shelf Jet Engines (sold as RC Jet Engines, I don’t know if they sell them as micro-jet engines or something too; some gliders use them for self-towing, etc) that basically just need a fuel line and electric control (similar to that for the BLDC motors in RC Quadcopters etc). I would bet the ones they use too have electric starter motors. So since they are custom built for small Size+Weight etc instead of made using Turbocharger Turbines designed for Cars’ Exhaust, they can optimize for size and plug-and-play operation. Hope this helps, and i am not an engineer or anything so anyone else feel free to chime in!

Still damn impressive though, and idk how i would feel about running fuel lines down my arms with flaming jets inches away!

That will be a while yet.

@@TechIngredients Aww. 😓

Kerosene has about half the viscosity of diesel and so it will atomize easier.

@@TechIngredients Well… glad I was able to find Kerosene!

No.

Pulsatile is an adjective.

How about pulsatism 🤔🙄

That's not too much of a risk. If a back flow occurred, the lines themselves would contain air in addition to the column. For extra protection you can insert a one way, high pressure check valve into the fuel line. No pressure is lost, the peaks and troughs in the average delivery pressure are simply reduced.

@@TechIngredients Excellent, thank you for answering and explaining!

That's similar to our future plans.

Probably not.

Yes, we tried that in the hybrid rocket engines and the metal posts frequently melted. I'd be afraid of damaging the turbine.

As it stands, a couple of thousand dollars. You could do it for about half that.

How about a pair of Berkenstocks?

@@TechIngredients Ahahah no no the Birkenstock are too far of a choice in your case Sir. Love your humor and your videos! Thank you for what you are doing, the level of the explanations is to the top! ❤