Hybrid Rocket Engine Test 2

[AZBINION]

its a fuckin cutting torch

[Tim4706]

Im not a smartass dont blow your self up thats all

[wargarkaz]

Nice flame , but doesnt seems to have big Thrust

[ferarrienzo1]

MY FRIEND ASKED ME IF THAT FLAME WHI GO OTU IF ITS CAN MELT SOMETHINK

[mangomonkey278]

such a cool flame :D

[corbonzo1]

@jrbpyro101 just wondering, you do have a flashback arrestor on your hybrid rocket engine right? if not your entire Oxygen tank could explode.

[bacphanhaibac]

it hot then it cold

[nuclear12321]

Inside?

[Tim4706]

interesting but against the law to fly in the US without the proper documentation not to mention it can be very dangerous

[jrbpyro101]

@Tim4706 This engine was never intended to fly. But I have talked with amateur rocket builders who use hybrid engines and they said you don't need any documentation, at least where I live.

[schl0tte]

@Tim4706 theres a world outside the us, smartass!

[azhomegrown85]

So how is this engine going to be utilized? Have you designed or built a rocket that will use this engine? Im assuming you are using a rather large oxygen tank at the moment, which indeed may not be the case but likely so. With that in mind, how do you plan on carrying your fuel? Do you have an efficiently designed tank that can hold the proper amount of fuel while staying within the limits of you're power to weight ratio? Nice work so far though!

[jrbpyro101]

@azhomegrown85 This engine is absolutely not going to be employed in any rocket. It is too heavy and inefficient to even produce enough thrust to lift itself, oxidizer, and a rocket. Someday down the road I will machine an engine that is actually large enough to produce substantial amounts of thrust.

[gui577b]

Haha, that's pretty cool. I'm surprised the brass fitting didn't just melt.

[7249xxl]

this isnt an engine al u do is punp a flamable fuel or gas trough a tini nuzzle and even then u fail at getting trust out of it.

[jrbpyro101]

@7249xxl Its basic design is a hybrid rocket. A lack knowledge on your part does not qualify you to discuss whether this is or isn't an engine. If you didn't have pre-elementary sentence construction, grammar and spelling skills, maybe I could discuss with you in a professional manner why this device is classified and an engine.. But I am afraid you would not comprehend a single word.

Thanks for watching!

[flyingtigre1]

@jrbpyro101

yea!

I suppose if you throw a rock in air you would call that flying. If you throw it hard enuff.

I think you would get more out of your engine using your A.P.U. than the rocket thing it self. (auxiliary power unit) to create ignition.

thx for the Tech info though ja ja ja jaaa

F-1

[the3Dandres]

is this compressed air u use for this engine ?

[x2malandy]

3 nice pops and then the oxygen hose blew off. Nice.

[5mrmotor]

You cant have a great amount of thrust or your o2 hose would pop off, you should build a thrust bench. Just a clamp on a small sled hooked to a spring- perhaps a cheap fish scale to give some what acurate mesurements. check out robert madox's engine stands. It may give you some ideas for better acuracy. dont forget your flashback arestors on high pressure bottles! Good luck and keep burnin'!

[DarkLuster007]

am making a mini jet pack, where do u get polyethene and oyygen bro?

[MrXray3delta]

Nice: you've invented a gas jet

[mario2002278]

put something in the fire

[kshitijkumar89]

But Does it Blend ?

[syndetic]

Gotta watch out that the metal doesn't get so hot that it melts the plastic tubing that supplies the gas. I'd use flexible metal tubing instead.

[octavioveliz]

So this is how he set his house on fire!

[MrJohnDevour]

look up ''pulse jet engine'' there is a way for you to build a very simple high thrust device without moving parts.

[dansmith57]

i like this and if ok with you might try to build one - you could add a little cooling system to the tip, some microbore copper wealded on or sommin and pass a fluid through it (water or oil but oil might carbonize)......will stop the tip getting hot and distorting plus you can run it for longer.............

[vlad781]

shouldn't you be doing this outside?

[sslayer0117]

wtf is it running off of?

[bradkrit]

Oh but be careful. Not only are the tanks at insane pressures and dangerous, but you will need very high pressure tubing, connectors, valves, etc. Also suggest getting a 1-way valve so you don't blow up your tank with backflow. And the tank will get icy and super cold after use from all the liquid vaporizing. The trickiest part is igniting the ice cold vapor in the combustion chamber. Oxygen is good as an igniter, like what you have now. Cya!

[jrbpyro101]

@bradkrit Thanks for the info! I've started getting a nice flow of money for personal experiments so this summer I hope to get a little more serious with hybrid and maybe even liquid fueled engines.

[QsoftStudios]

@bradkrit Oxygen is not flammable as most people believe so an one way valve is unnecessary, and the kind of oxygan tank im guessing he is using is a benzomatic type one. thay are at a lower pressure then the 3000 psi tanks for oxyacetalyne welding.

[bradkrit]

@QsoftStudios Oh. I was under the impression that a powerful oxidizer is flammable when concentrated

[QsoftStudios]

@bradkrit Nope, an oxidizer is something that "oxidizes" something else. For example if you light a match and try and light a stream of o2 it will not light, instead the match flame will get bigger and glow alot brighter. It exelerates the burning of other substabses.

[bradkrit]

@QsoftStudios Ah so I guess a high concentration of a powerful oxidizer is only dangerous because anything could act as a fuel and burn super fast.

[syndetic]

@QsoftStudios Technically, an oxidizer is something that removes electrons from another agent in a redox reaction. In this case the oxygen is reduced and the polyethylene is oxidized.

[QsoftStudios]

Try putting a water jacket on the engine so that the nozzle will not melt XD

[bradkrit]

Good to see people playing with stuff like this! Nice work! If you want significant thrust you will need steel tubing and liquid oxygen instead of gaseous. That gets dangerous though. Another thing you could try is using nitrous oxide instead of oxygen. A common hybrid motor is nitrous oxide (like NOS for a car) and rubber. You can get NOS at any car tuning shop usually. They pressurize the tanks high enough to liquidize the NOS. Just flip the tank upside down so you draw liquid. Cheers!

[dansmith57]

@bradkrit NOS is a great idea!!!!!

[TheL046Kid]

It's just a torch.

[Abnesis]

THAT IS FIRING WATER!!! FIRE DROPS!!!

[gauntster84]

thats not an engine the definition of engine is A machine with moving parts that converts power into motion. i dnt see any parts that move

[jrbpyro101]

@gauntster84 It is also defined as any machine designed to convert energy, especially heat energy, into mechanical work. Would you say a F-1, J-2, and RS-24 just to name a few, aren't engines? Like I have to tell a lot of people now days, do read up before you go talking about devices and ideas you don't have the faintest idea about.

[sismofytter]

@gauntster84 Do a rocket engine have moving parts?

[pubuman]

@gauntster84 "Engine: a machine for converting thermal energy into mechanical energy or power to produce force and/or motion." (according to OED) - idiot!

[ajanta7]

dare ya to let the  clamp go

[robos234]

Can I use instead of oxygen HHO ?

[brandonsg123]

haha it farted at 0:20

[airlinerdude12]

it's not producing any significant thrust at all. All he is getting is a welder, or a cutters flame.

[jrbpyro101]

@airlinerdude12 Well no of course not. I MIGHT see a max thrust of a pound but still doubtful due to the simplicity of the parts used.

[7249xxl]

@jrbpyro101 no yo udont

[jerjanerayo]

@airlinerdude12 yeah i agree with that

[QsoftStudios]

@airlinerdude12 Actually these hobby engines can produce up to 4-5 lb of thrust.

[garuh123]

it look like old farts

[kanemitchell99]

where do you get the polyethylene and the oxygen? do you need to order it in somehow or can you just go out and buy it

[jrbpyro101]

@kanemitchell99 You can pretty much just go out and buy it.

[submelon8]

that back fire was sick

[willvb13]

wouldnt it be alot easier to just use an acetline tourch

[funtimeswithflames]

wuts the oxidizer

[jrbpyro101]

@funtimeswithflames oxygen

[itsaidhi]

@funtimeswithflames

its in the description

[Lordofdragons16]

I love how the hose blew off at the end.

[DanJeffery07]

Have you measured pounds of thrust?

[jrbpyro101]

@DanJeffery07 No I havent, I was planning to build a device to measure the thrust but I have moved on to other things.

[remi009340]

light a joint off it!

[Mykola40]

The videos like this are good guide for the bad guys.

[thepwnanater]

looks like it has a saliva problem, its dribbling!!!

[sniper133t]

Congrats you made a blow-torch.

I'm working on a pressurized self containing liquid fuel rocket motor, my calculations say it should be able to propel it's self. And if so ill put a tutorial on youtube.

[matzahdog]

MY HYRDOSPACE PROXIMTER WILL KILL ALL MY HATERS

[hubergeek]

Have you tried a graphite nozzle, so it won't melt with the heat?

You could also try tar and parafine to get more power.

[jrbpyro101]

@hubergeek Unfortunately I dont have the equipment to make a graphite nozzle otherwise I would use one. I have tried tar but didnt get much more power for some reason.

[iSOisoleucine]

I think you might need to prime it better. :P

[cookiesrock35]

so with more prototypes could you get this to fly?!?

[jrbpyro101]

@cookiesrock35 Ya I probably could. I would have to refine the nozzle, make a bigger engine, and get a light oxygen tank. But eventually I think it could get it off the ground.

[cookiesrock35]

@jrbpyro101 sweeet

[salmanpakipaki]

try putting ur hand a foot behind it !!!

[brittishrcpatato]

where do u get the oxidizer from? and how do u get it to the engine.

[jrbpyro101]

@brittishrcpatato I bought the oxygen from a welding store, and I used a plastic tube to get it to the engine from the tank

[brittishrcpatato]

@jrbpyro101 ok thanks what would they sell it as?

[jrbpyro101]

@brittishrcpatato sell what as?

[brittishrcpatato]

@jrbpyro101 the oxygen would it be in tanks?

[jrbpyro101]

@brittishrcpatato Yes

[vignesh12300]

@jrbpyro101 i think he means the oxygen tanks

[FoMoCoForever]

looks like a cuttin torch on steroids! Very cool!~ ohh and if any of you ever cut 3" steel with a torch you would know that there is potential for lift. especially when you add the extra o2. give it a proper nozzel and you would be set!

[Vitaliy711]

the "explosion" in the end was just the engine spitting out the burned polyethylene tube.

[olejniczak12]

just a mini flamethrower.

[Penguincracker]

you re-invented the the flamethrower, dude ^^

[wilfeatscheese]

i love the good grief at the end :)

[jochemk6]

is the oxidizer pure oxygen? or just normal air

[jrbpyro101]

it is pure oxygen

[Mitrolaja]

Im sure it doesn't make 5 pounds, it could be around 0,3-0,4pounds. That would mean that it makes 560 Ns, you need at least 200 grams from the best propellant to reach that and only under high pressure, 5MPa.

[jrbpyro101]

Where did you come up with those calculations? I have many friends that have build even smaller engines that put out anywhere from 4 to 7 pounds of thrust.

[Mitrolaja]

You wrote that it makes 5 to 10 pounds and we can see that it makes for 25-30 second. How much polyethylene did you put into?

[jrbpyro101]

I said maybe 5 to 10 pounds. I put is about 3 and a half inches of half inch tube.

[Mitrolaja]

So you have around 10-12 gramms of polyethylene, it reacts with 8-10 gramms of oxigen. With Laval nozzle and under high pressure you can reach 60 Ns. It burned for 25 minutes, so the trust was around 2,4 N, it is 0,5 pound.

[soverato3]

how mutch trust ???

[jrbpyro101]

I am not sure exactly, I have never measured it. I can guess there is anywhere from 5 to 10 pounds of thrust.

[Grundalizer]

weird how quiet it is when it puts out that long flame. but badass none the less

[jubetool]

b00m! ---> "good grief"

[douro20]

Pretty good for an engine made from plumbing fittings. You need to work a little on the flashback- a small brass check valve in the end might work to stop it from blowing off the oxygen hose when the fuel is spent.

[Patriotgal1]

VERY interesting!! How much thrust??

Being a TOTAL science nerd, I am VERY much into these things!!

[jrbpyro101]

I am not sure how many pounds of thrust it puts out because i never put it on any kind of device to measure thrust. I would imagine it puts out about 5 to 10 pounds of thrust

[Patriotgal1]

ThankYou!! I really need something in the range of 500-1,000lbs, for my "toy". I'm personally experimenting with 85% H2O2, and Kerosene!! IF I can keep the bell-throat from melting, it MAY just work!

Thanks again!

[hybridpyrotech]

do i have to use liquid oxygen for this?

because i can get medical grade oxygen (just the oxygen not liquid)

[jrbpyro101]

no i do not use liquid oxygen for this setup. On all the tests i have done so far i have used medical oxygen cylinders cause they are cheap and easy to find at flea markets... Where do you get yours or how much and what size are the ones you can get

[hybridpyrotech]

i live in singapore and i know where to get it in an industrial area its around 10 to 15 dollars for a tank

[Raketovemodely]

Take a look on this one watch?v=nsB_tXj9BCc

[jrbpyro101]

that looks like a pretty good engine!

[sniffsnarff]

"good grief!" lol

this stuff is fun, isn't it? you bet!

[mista123420]

air line...

[sethcat99]

I think it got a little hot.

[heading7593]

Thats pritty cool