My Elbow Engine

[chrisholds1]

Lovely, simply lovely!

[superbungabunga]

very unique

[gregiec1210]

Whats it for?

[mikenco]

That is a thing of beauty. I bet you have the coolest shed in the country!

[DARKSTAR1462]

stick a playing card in the bottom and launch it!

[ekpil2000]

Reminds me of an axial piston pump, but this seems simpler.

[blogwitch]

@ekpil2000 Similar, but I think the axial pump works on a swashplate principle.

[ninja6kid]

where do you even find a piece of aluminum that big to machine...must have cost a pretty penny..

[blogwitch]

@ninja6kid, like most of my engines, they are made from scrap materials picked up from here and there, nothing is thrown away until it has no further use. It most probably cost me (mainly for the fasteners) about 2 to 3 pounds.

[ryan012185]

simplest action but the coolest iv'e seen,,,,

[pco1984]

Wonderful!

Especially the dome on the back.... love it!

Would you mind me copying your work for my next school project?

[blogwitch]

@pco1984 No problems, do as you wish with it.

[jacklav1]

A week's work!

[blogwitch]

@jacklav1 Yes, just in my spare time.

[piespokladowy]

*****

[treasureinvessel]

the engine is amazing, but what about the 96% loss of energy in making compressed air ?

[TAPriceCTR]

how the heck is this so quiet?

[14omega28ok]

You British Folk are some intelligent Motherf*****s Great video man

[JonDeth]

So does this engine have a specific application, is it more efficient than other 90 degree drive mechanisms, does it actually serve a realistic purpose and application?

[DELRICO213]

wow im like in shock very good job i only wish i could build like that.

[pissedatpez]

thats an amazing design, id probably overload mine if i had it just to se how much it could take:/

[JGMagoo]

First, wouldn't this technically be a 'motor' an not an 'engine' since it is powered by an outside source?

Second, how does the efficiency and strength of this elbow joint compare to, say a 90-degree bevel gear?

[JohnTheRipper222]

my dad made one of these in his high school machine shop class now i have it. its tight.

[Blaster7492]

put it at 200psi lul

[Shawzy147]

NICE ONE : )

[pombenenge]

1:20 looks crazy

[Dirtboy101]

thats fantastic

[MrROTD]

wow this blew my mind, I had to do some research on it, now I understand what I'm seeing lol. Beatiful engine and a cleverdesign

[deaftodd]

Interesting, what if theres an unexpected strong workload, will it bend those elbows?

[TwisNinja]

there are ratchet tools with that same type of elbow

[mouayad888]

its powered by air so its like air air compressor

[perpetualmotion192]

Could you get me a copy of these plans? Its something I'd like to try to build in shop.

[blogwitch]

If you do a search for John-Tom you should find a site where the plans are available

[digitalbroadcaster]

Nice machine shop work! Actually, first class finishing! Well done.

[thesniperofcs]

Nice Motor :)

[Lubomiro1988]

wow great is it pneumatic ??

[NBAfreak14]

can you send me the construction plan from the elbow engine? i would like to build this in my education.

(sorry for my english,i'm german^^)

[blogwitch]

This is an engine made to show the concept of how the elbow joint worked.

You could have one input, and the output would be at 90 degrees to the input, but the output could be around a full 360 degree arc if required, with the centre of the arc being the centre on the input shaft.

I hope that explains it more clearly.

[cprich22]

im realy confussed

[noudge]

I wonder how it would react if the driver becomes the driven and I can not imagine what would be the future application of this mechanism.

[blogwitch]

If you read the previous posts, it does in fact explain why this engine was created.

In earlier times, it was used in many applications, such as line shafts for driving machinery.

[noudge]

I bet this will be made of tough material on the elbow connecting part if this has to be used in line shaft. Is this really an engine or only a mechanism? I am confused on the term engine.

[mashersmasher]

that thing looks like it's about ready to fly apart! not by it's construction since it looks beautifully constructed but because it's moving so fast! what would happen if you tried to run it on steam?

[Mentorcase]

Very nice effort.

[allterrain07]

good concept.

have more information

[ollieoniel]

How efficient is it?

[sushimotoo]

Hi,

nice concept.

But is'nt it a little bit to fragile?

Have you tried it in a larger scale?

[SIMONE1932]

molto interessante sarebbe vedere il particolare della distribuzione

[pcoronaCPP]

Can you explain how it works. that would be great. Thank you.

[PB360]

Just wondering how much torque you can get out of that...It looks like its going quite fast but ...maybe a gear conversion will help...its for a college class. Im Studying mechanical engineering

[blogwitch]

As described above, this engine is a by-product of experiments and theories of Hobson's coupling, and you are perfectly right, it has has hardly any power generation properties of it's own.

It's just a baffling little bit of eye candy.

[cornholeklink]

I guess the loads it can traverse over the 90 degrees is extremely limited, hence we do not see this in real life. Only good enough to spin a little fly wheel.

[blogwitch]

It is actually not my design, I just made it from basic plans.

But it is to demonstrate what is called a 'Hobsons Coupling', which allows a drive to turn thru 90 degrees without the use of gears.

Imagine the flywheel being replaced by a shaft, as the shaft is turned, the one at 90 degrees to it also turns because of the way the 90 deg couplings move.

It is one of the most baffling engines when seen running, but one of the simplest in design. 6 cylinders and pistons only 5 moving parts.

[SthealthRaider]

i dont understand how u made that!@

[PackratCND]

Now that is the coolest little gismo I have seen in a long time ... Well done !

What was the motivation behind it ????

[ososordo]

es impresionante su invento , creo que funciona con aire , exelente para aplicar a infinidad de articulos del hogar o de trabajo , tal ves hasta vehiculos , lo felicito

[wrxlou]

wouldnt wanna go sticking ya finger in there

[ScoutCrafter]

Beautiful Job! Smooth runner! Thanks for sharing!

[justimaginenow]

how does it work??/

[AZURA888]

I believe i understand. It is a neumatic motor an there are 3 valves an they go up and down by the air energy. This movement impels the pulley which there is in other rotational plane, so this sistem could be very good to change the spinning direction without a complex transmition of gears.

[REWYRED]

I have never heard or seen such an animal! Very interesting!

[tim5656]

wow ive never seen something like this before

[ZZZZ7HUIX]

cool

[gptau]

great work! this engine is a dream of my childhood ( a plan on french "popular mechanics"!!!)

[blogwitch]

If you search for a site containing 'john-tom' maybe there will be some info about this engine

[HartfordTommy]

Beautiful. You're an excellent presenter too.

Say, I had no idea what I was looking at until the end, where it can be begun to be understood,

a bit!

How about another viddy of this engine with an intro telling us how the motions go, and what's inside the elbow cylinder?

Thanks!

[Schwan427]

that is really amazing to watch. i couldnt tell what was going on until it finally stopped at the end and i could stare at it for a minute.

[aubreyaub]

G'day. have just about finished my own engine.

It only "SEEMS" to run in reverse. You must suply "air" to the other side. Just being a smart bugger, but bloody nice, otherwise.

Cheers, Aub.

[danhow3]

What a lovely little engine, truly genious. I have been researching model engines for one of my projects i have to make later on in my apprenticeship. i was wondering if you have any plans/info you could possibly send me? please get back to me.

Kind Regards,

Dan

[HOPPERFZR]

i have plans for this engine if you like

[FrazerGert]

do you stil have the plans for this elbow engine, in metric for me

[steamyman]

fascinating! thanks for showing it! see my vids at steamyman - that's wat to type in the youtube search box.

[billybasstv]

this is very cool

[snoopdog68]

Thats great, I will be building one myself.