Jet engine

adibrook · Post by **adibrook** » Sat Jun 05, 2004 9:37 am

Hey everyone.

I'm going to try to build a jet engine out of a car turbo.

But ther's one thing i don't understand about it. How do you lubricate it? In your jet engine project you talked about oil pressure etch, but where is that oil going?

adibrook · Post by **adibrook** » Sun Jun 06, 2004 6:04 am

I went to a garage and had a look at an old turbo...And they seems to have a pressurised oil feed.

Strange, but i never knew that! Oh, well, now that i do, i'm pretty confident that i can build a gas turbine after i finish my tiny valveless.

Stephen H · Post by **Stephen H** » Sun Jun 06, 2004 6:07 am

tiny valveless?... how small is tiny?.. tiny doesnt often work

adibrook · Post by **adibrook** » Sun Jun 06, 2004 8:03 pm

about 5mm inside dia piping, and 12 mm dia combustion chamber bit.

If it works, this will power a really light model boat, and maybe eventually a plane.

Tom · Post by **Tom** » Sun Jun 06, 2004 9:24 pm

forgive me, but i dont see how that will work, let alone power a plane. i mean, there is no way something like that will generate enough thrust to carry enough fuel?

Tom

Stephen H · Post by **Stephen H** » Sun Jun 06, 2004 9:46 pm

adibrook if you look in the valveless section you will find that you are not going to get this valveless working. it is to small! people who have been here for years cant even do it!

Post by **Mike Everman** » Sun Jun 06, 2004 11:29 pm

Even if it could sustain itself, it would be less than 2-3oz of thrust max, if everything was going right... I'm betting you've made it less than a foot long, too, which means it will have to operate at greater than 5-600Hz, which also isn't going to happen, unless you use hydrogen and a sophisticated delivery.

Kentfield's team concluded a lower limit of 22mm dia, but silly me, I'll always look at that as a challenge! I'm really not trying to dissuade you from trying, but some fundamental limits of the acoustic length, acoustic energy available, and fuel mixing must be known and worked around somehow.

milisavljevic · Post by **milisavljevic** » Mon Jun 07, 2004 12:40 am

DELETED.

adibrook · Post by **adibrook** » Mon Jun 07, 2004 6:50 am

Oh, ok..Maybe it won't work then...

I'll try to build one abit bigger, with probably about 50mm piping.

Stephen H · Post by **Stephen H** » Mon Jun 07, 2004 6:57 am

that sounds more realistic... hows the turbine comming ?

adibrook · Post by **adibrook** » Mon Jun 07, 2004 3:14 pm

On sat, i'm gonna go down to the scrapyard. They said that if i'm prepaired to take the turbo off myself, it'll be 25 quid, which doesn't seem bad compared to other people who have quoted my about Â£175.

The turbo i had a look at (which i mentioned previously) had cnackered bearings, so i couldn't use it.

adibrook · Post by **adibrook** » Fri Jul 16, 2004 4:08 pm

Yay...finally got one. have a look at my other thread

www.pulse-jets.com

Jet engine

Jet engine

Found out...

Tiny is...

Oh...

scrapyard

Got one!!!