Keg-Based Propulsion Design - KegRocket Ep. 2

[@TomStantonEngineering]

Enjoying this project with a beer in hand 🍺

[@KegRocket]

Hoping you enjoyed the 2L bottle features 😉

[@TomStantonEngineering]

I did! Especially the burst test haha

[@SpaceFlamingo07]

Enjoying this project with the US drinking age in hand

[@feelincrispy7053]

I feel like you’re always in every niche engineering project video comment section haha makes sense I guess

[@skittersspider1704]

Possibly would be if I was 21 or older, I live in the US

[@BPSspace]

WAKE UP BABE NEW KEGROCKET VIDEO JUST DROPPED

[@ChrisCrozier]

OOOoooo Beer rocket + Meat rocket = SPACE BBQ!

[@richspillman4191]

I hope your telemetry electronics is used on this project. It was great seeing you in the footage.

[@DylanEdmiston]

lolll

[@Banaannaa]

this is crazy, I watched one of your vids then wanted to see some liquid fuel ones and found this video and comment!

[@julianlauterfeld6273]

Mister Bisslington in the house 😂

[@robertkesselring]

Video published right before Star Ship's second flight when a lot of people are searching for 'rocket launch' videos... Well played sir.

[@uvbe]

got this randomly recommended... I love it! Waiting for part 3!!!!

[@BlackLight025]

You could redesign a beer tap to feed head pressure and empty the propellant as well The nozzle can probably be put together like the old nasa style if you give it multiple small high performance engines instead of just one. Making small components would be quicker when testing different designs I test propulsion devices for a living if you want advice 🚀 would love to see keg-rocket take flight and go farther than anyone thought

[@KegRocket]

Thanks for the thoughts here. We did consider multiple smaller chambers but were slightly concerned about the consequences if one of them failed to light. I like the idea about incorporating a beer tap.

[@Gingerbread3232]

@@KegRocketbro you gotta post on KZbin again we are waiting!

[@zaflowgalactic]

Since you're doing shots of moonshine now, it's kinda like a Jagerbomb! Cant the launch pad be called the Keg Stand? The feed system will help keep it from needing turbo pumps and other insane to engineer challenges. All you need now is just the combustion chamber, and to tinker around with the alcohol blow down gas being NOT AIR for obvious safety reasons. Argon, helium or propane might work but the pressure in the ethyl alcohol tank will be varied differently. The total oxygen amount to get 1/3rd liquid, and the orifice sizes to get appropriate flow are all going to be different constants or variables, but I would map the alcohol to the oxygen's natural flow for simplicity unless throttling is a must. You'll need to throttle one of the valves differently than the other to get a consistently fuel rich burn as the oxygen will evaporate much differently than the alcohol, so you will have two different pressure decay rates. Also you may want more alcohol to get more cooling without adding more specific impulse because there is no oxygen to turn it into power. One approach is to make a test rig for your engines and just try a bunch of combinations, you may find throttling the engines either super easy, super hard, or completely optional. The other contemplation is how to get maximum height and speed, with variables such as burn time, thrust level... Maybe there is an optimum, or maybe just full send, since there will be a 1g acceleration working against you. The less time you fight that 1g the better, but there are structural limitations of course and you don't want a dented beer can at max q. Good luck! I wanna see space men and women take sips of fuel on the ISS as soon as you can get it to them! XD

[@artej11]

I wanted it to fly on Keg-rosene :

[@oliverer3]

There's something about engineering around arbitrary requirements just because it's fun that I just love!

[@king_br0k]

Love it, useing the limitations of your concept as advantages

[@rikpoletti]

You can use liquid CO2 to pressurize fuel tank. it's 76 atm at standard temp, wich is compatible with Keg pressure limit. A rubber inner tube can be used to separate CO2 from Fuel and Liquid Oxigen. So you can have constant pressure for all the flight.

[@Rizzler420-uh4yd]

COMPLEXITY! COMPLEXITY BAD!

[@ProjectBrupeg]

Having built a air compressor from two kegs welded together. I absolutely strongly endorse making a rocket out of these magical stainless tanks!

[@KegRocket]

Now that's a marine grade air compressor!

[@soft-conf]

LETS GOOO!!! KEG ROCKET EP 2!! I have been patiently waiting.

[@vinylexperience77]

I love channels like yours. This is what KZbin was founded on. It is a shame what is going on with KZbin. Keep up the awesome work and recording it, and sharing it with us all.

[@NicholasRehm]

I am rooting so hard for you Keg stand on launch day mandatory

[@Lilpiip123]

Honestly talk to red bull. They love sponsoring crazy ass projects like this if you just slap a red bull logo on it lmao.

[@benjaminnevins5211]

Whoooooo! Been waiting for an update!

[@AirCommandRockets]

Great update! Really interesting to hear the methodology behind the design.

[@cherylm2C6671]

Seems to me that acceleration would help out feeding of fuel, and, at a constant feed rate, acceleration would increase as fuel is burned and overall weight drops off. Secondly, the pressure difference between the inside and outside of the tank would increase as the rocket climb, both considerations leading to there not being as much loss of feed rate. Also, to the degree that the feed rate falls off, the pressure in the engine would also drop off, so the back pressure in the fuel lines resisting flow would be less. By the way, the V2 used alcohol (I read 75%) and liquid oxygen.

[@BPBomber]

Just like your 2L bottle demonstration, I experience that same effect in practice using a pump garden sprayer to spray weeds. As the amount of liquid it contains decreases, to a point, the sprayer seems to work better and better.

[@KegRocket]

Exactly!

[@babygorilla4233]

I like how I immediately understood why you want less propellant in the tank because it's exactly how the garden sprayer I use to water plants works. As you pump more out there's more gas to pressurize so it runs out slower and pumps the fluid more smoothly. I water my plants by rocket science cool.

[@Cyrus_of_the_mountain]

A liquor fueled rocket, sounds like the ticket to me!

[@baileyrahn266]

how about the oxygen tanks pressure? The super cold oxygen will warm up and boil off increasing pressure and the pressurized air will decrease in pressure being chilled by the oxygen. maybe fill and pressurize the ethanol tank then fill the oxygen tank without pressurizing it then monitor the pressure in the oxygen tank as it rises until it reaches the desired pressure and then ignite?

[@KegRocket]

The oxygen tank (keg) will be vented to the atmosphere until final countdown and then pressurized with nitrogen. As long as the vent valve is not shut for too long, it should not be an issue

[@timebert9467]

Really cool project. Have a look at keg CIP systems (how kegs are cleaned). It's pretty much the same as your pressure feed system but on an unmodified keg.

[@simonabunker]

Great explanation! It would be interesting to hear how you are going to deal with cryogenics - I have heard liquid oxygen can be nasty stuff. Loved the extra scrubbing out of hypergolic fuel!

[@vicroc4]

He's definitely going to want some insulation on the LOX tank.

[@theredstonehive]

I think a fuel choice of anything other than ethanol would be illegal for this project.

[@petrosiuksline7013]

More more more, we want more!

[@adamrak7560]

you might want to use 96% ethanol and not 99%. It is cheaper, and burns a bit cooler, with almost the same performance. If you have engine temperature troubles, you can easily go down to 60% ethanol + 40% water, which should perform okay, but burn "very cool"*. * for a given value of "very cool"

[@BSpinoza210]

Cooling and keeping the LOX cold is going to be....challenging. You're going to need some insulation, not to mention the complete cluster f*k that is dealing with LOX. Cleaning is going to be king, as any dust particle or stray hair provides fuel for the LOX that can be ignited, and it will ignite, LOX always finds a way.

[@szszg]

I was just wondering about this project while looking at some Guinness kegs at the front of the pub. And bang, update!

[@AIM54A]

run 75% ethanol and 25% water in your mix for your fuel. You get almost the same performance but better cooling.

[@baileyrahn266]

Not a tutorial my ass. My neighbors are gonna hate me

[@ryanthompson7884]

Yes I sure do enjoy feeding fuel and oxidizer into a... a uh... ...combussin' chamber? 😳

[@dmacpher]

“Zoom zoom” is the best engineering requirement

[@noobFab]

Been waitin' fer this!!! Suh-weeet! Can't believe you had to spend that long explaining how the Keggaroo is gonna fly, I mean it's not rocket sci.... oh, wait...

[@E30B]

'honey wake up keg rocket posted a new banger

[@richspillman4191]

I hope you partner with BPS Space for the telemetry electronics.

[@fgbhrl4907]

What effect does the acceleration have on the flow of the fuel / oxidizer?

[@richspillman4191]

Great question, there is also the atomization of the ethanol to consider, and at what temperature, then the viscosity of the liquids and the pressures of each, then the G forces. Check out "EXTREME ROCKET!!! O25,000" Gerald 'Skippy' and his 'death from above' O 25,000 motor rocket. He estimated 50 G's, built it for 100 G's, and pulled 75 G's. It is an awesome launch! WHOMP!

[@KegRocket]

It will increase the pressure at the bottom of the tank slightly, but it's a relatively small effect

[@StarScapesOG]

I don't drink, but I find the serendipity of the beer keg rocket running on ethanol to be hilarious!

[@kronos10705]

LETS GO!!! MEN I TRUST IN INTRO!!!

[@GaryMcKinnonUFO]

Von Braun would love this, home-built rockets.

[@brucerowney8380]

Good stuff! Enjoy the journey and thanks for sharing it with us!

[@srabansinha3430]

Kegs have a big Way to go ! Enjoying your enthusiasm to the brim ;)

[@dfgaJK]

I'm fascinated to see how complex the rocket engine is. I am intrigued to know if it will open up the prospect of model rocket full thrust vectoring!

[@actionjksn]

You cannot legally put thrust vectoring on a hobby rocket. That would be a guidance system, which means you made a missile. You would get a very unfriendly visit from the federal government.

[@kwkspectre]

Glad to see an update on this project. Are you going to source the LOX or build a generator to make it yourself?

[@KegRocket]

We plan to have it sourced from an industrial supplier... But we'll cross that bridge when we get there.

[@atrumluminarium]

I wonder how dissolving methane in the ethanol would change the impulse

[@SpeedyGwen]

about the empty space for blowdown mode, its actually the exact same principle as for water rockets, around 33% is the most optimal amount of water compared to air, more water and it will lose thrust fast, less water and it will run out of water sooner without as much deltaV gotten, I am extremly happy of doing water rockets as a kid and knowing that from it

[@shawnrinkel8377]

I’m with Tom on holding a beer. This is so cool!

[@notmadrocketscientist1902]

I like how simple your propellant feeding system is. You don't need extra tank for nitrogen and pressure regulators both oxygen and fuel. Not necessary less mass but simple.

[@WimsMill]

The first rockets (German V1 and V2) also used ethanol. They reportedly had problems with storing this liquid. It would often disappear.

[@djdrack4681]

Wait? I'm an expert in avoiding The Kraken so Kerbals don't die... How can you have staggered duel LXO/liquid fuel tanks? Even IF it was a intermix ratio of 1:1, you'd have a rocket that is top/bottom heavy, light in the middle...which Jeb Kerbin is sus about. Alternative 1: Couldn't you cut the kegs and put a plate/gasket seal so bottom is 2/3 and top is 1/3...bottom is fuel+ comp air, top is comp air tank for maintaining pressure. Have a adapters in the plate as blow/pressure valves in: so its purely passive: moment fuel compartments pressure drops below X psi valves open and let extra comp air in. Alternative 2: Scramjet style pressurization Same 2/3 and 1/3 type separation of the kegs...but top compart. is ramjet style inlet valve to just provide pressurized air as rocket is flying: same blow valve approach, but you don't need the weight of the comp air on takeoff; you'll make it once rocket gets to speeds for it to work.

[@bakedbillybacon]

You guys are absolutely amazing. Let's f* beer launch!

[@dallingoodrich]

you should carbon fiber or kevlar wrap the kegs turning them into MUCH HIGHER pressure POVs for pressure fed rocket.

[@accordv6er]

Has anyone used any sort of kinetic ram that leverages the existing weight of the propellant and some check valves to get slightly more pressure at the end stages of tank discharge? Not worth the weight? Or a spring/some sort of accumulator that can be charged alongside the pressure over/liquid setup here? I'm imagining a gas shock's floating piston essentially... I guess these don't work with the kegs, and additional cylinders that can take pressure are probably not worth the weight either. ... A design may still be worth considering. An internal bladder fed by a hose to a small accumulator with a spring in it, to keep pressure above a certain level.

[@finnrutha4577]

Love the video and the project idea! 😄 all the the best from New Zealand from an employee at Rocket Lab 🤘

[@defenestrated23]

Cave Johnson: Here at Aperture Orbital Services, we use liquid ozone! That's 50% more oxygen per oxygen!

[@tomarmadiyer2698]

Kegel Space Program

[@DylanEdmiston]

I think you will probably need to water down your fuel to not melt the engine. Copenhangen suborbitals does this... Really excited to see what you do with the engines. Hit me up if you want help with those. I have a CNC that would help.

[@KegRocket]

Yes we may need to dilute it. Thanks for the offer, we'll keep it in mind!

[@11regnartseht]

You could dilute the fuel with beer.

[@TrebleSketch]

Thabks for the update, you've done well at explaining the reasoning/why and such! And love the bloopers too :D

[@donlindell1994]

Where are the awesome tee shirts with amazing logos?!?!? How can I possibly enjoy a frosty adult beverage while watching the much anticipated launch episode without wearing some sort of officially licensed "KEG ROCKET" merch? This is exactly why I went back for my MBA after working 5 years as an EE. THE MONEY!!!!

[@KegRocket]

We're working on it, stay tuned!

[@Ian-sm9uv]

Here's hoping you livestream the launch so we can all shotgun a beer during the countdown.

[@aaronsimpson8329]

Okay I'm not gonna lie, I saw the thumbnail and saw the channel name and turned to my girlfriend and make a joke about it. And then the video started playing and wow I was impressed. And feel necessary to say I like what you're doing here! I haven't even started the video and I know it's gonna be legit

[@vicroc4]

As an added bonus, by using LOX/ethanol you're using the same combination that the X-1 did. (Also the V-2)

[@donovangregg5]

Turns on Gauge on top of bottle, saw 200 and about threw up LOLOLOL. Realized that is just a start up number LOL.

[@-_-hi8964]

Thank for the update. Love this project.

[@merxellus1456]

No matter how small or how slow, i really wish u guys do weekly updates.. this project is quite interesting

[@TmanT321]

Heck yeah man keep it up! Love the music taste too. Men I Trust is one my favorite bands

[@eqilibrius]

Wrong Thumbnail! That's the reason why this episode doesn't get a lot of views. It tool even me several days of youtube recommending me the video until I finally clicked on it. Put up a real picture of the rocket 🚀 😎

[@ulrichmachtle4864]

I heard when you buy 2 Merlin Rocket Engines, you get the 3rd for free...

[@setituptoblowitup]

Long live keg rocket,when old dudes say they got rocket fuel in there cup thay mean it ⛽😵🤙

[@AdricM]

what was the top pressure the bottle took? back in the 90's we found they failed at about 250psi, but i know they are thinner now.

[@KegRocket]

Close to 1200psi, but it was specially modified to do so.

[@user-el4np5xt8c]

Awesome concept, nice work man. Thumbs up and hope you get big^^

[@dash8brj]

Shame it can't run on beer - that would be hilarious. Subbed - you were suggested to me by the algorithm. looking forward to what you come up with for the rocket engine itself :)

[@tonydotnottingham]

Thanks for explaining your thought process and taking us along for the ride!

[@MrGatlin98]

Hahah "Legal Limit" and "Cumbussin' Chamber" are great Easter eggs.

[@owngamesgamer4030]

if you put liquid oxygen in the front keg it would make the rocket more stable thats cool

[@gsestream]

responsibly? what was in the keg before the rocket application? :) whats the problem with that, diy/buy or not.

[@ch4.hayabusa]

This is why the sale of 190 proof food/rocket grade alcohol is legal in Texas

[@justus1995]

Wouldn't pressure regulating the fuel supply lines simplify the motor design a lot? Been following the project quite a while, love these videos

[@KegRocket]

It might simplify the motor a bit, but these are solvable problems

[@MAZEMIND]

So step 1: Keg Rocket. Then Step 2: Hyper Sonic Keg Rocket.🚀🚀🚀

[@burntorangeak]

I am indeed enthusiastically watching this project.

[@caseybackes]

Bro. Nerd to nerd, this is freaking awesome. Cool engineering project, thanks for documenting the process. Very interesting to watch. Keep up the great work!

[@lukeyboi2204]

can't wait for future videos!

[@julius6429]

Love the series! Can you send a can of beer on the rocket? That would be the cherry on top❤

[@fruitymf6952]

That's ine of the best project I've seen here and I hope it will be succesful it's a really nice idea

[@tbounds4812]

this is the first ive seen of these videos i knew id enjoy it but god damn dude i didn't expect the video to be this high quality

[@mfzb0912]

Make the pressure tank the nose cone.. it holds air like the head of a beer.. header tank..

[@walkstheman98]

This is a project worth waiting for new videos. I love this amount of effort and engineering done for fun, makes me want to build stuff again

[@XIIIStefanC]

I always thought Jet Fuel was Kerosine? awesome video btw!

[@wtechboy18]

man is trying to email drinks to space at 14 kilobeers per second (kbps)

[@AllToDevNull]

Hope you included the reduced pressure capabilities of cold metal.

[@dirtdart81]

Exciting update, looking forward to the next, whenever it comes

[@hamlordofpork]

I really hope the button to initiate the launch sequence is a beer tap lever

[@Ender240sxS13]

Fantastic, can't wait to see work on the engine. My senior design project for my aerospace engineering degree focused on designing a liquid prop engine for a cis-lunar "space tug", i love this kind of stuff.

[@ryelor123]

I wonder if a heating element in each tank could be useful to increase the pressure.

[@plane7453]

Yes, I was really hoping there was going to be another one of these Videos.

[@nickjones6065]

Great video, well explained, I even understood the maths!

[@RocketmanAleks]

I love everything about this project, and your videos make it so easy to digest the info! So excited to continue to follow project KegRocket. I'm gonna have to come out to see the launch when it happens! 🚀

[@Azr0n-40k]

So next vid is about a thruster or the on board computer or parachutes!

[@meihem76]

I spent 7 years following a Classic Mini build with a 3-6 month update schedule that was initially expected to take a few months. I'm patient enough to wait for this in your own time.

[@KegRocket]

Thank you for being a reasonable person :)

[@ABFMick]

Here from Project Binky?

[@IanMott]

Best use of kegs ever!