Bob C
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| posted on 12/4/06 at 07:47 PM |
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Electric oil pump
I need the above to supply a turbo bearing for a jet engine I'm making. Will a windscreen squirter pump enough oil & hold it together for
the few minutes it will take to win the bet & force "staz" to run naked through the village (bet made in pub by my brother in front of
many witneses......)
Anyone made a turbojet on here????
cheers
Bob
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flak monkey
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| posted on 12/4/06 at 08:01 PM |
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Washer jet pumps pump quite a high volume of water given their size. But it will depend on the viscosity of the oil whether they will handle it for
your job.... 
Sera
http://www.motosera.com
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paulf
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| posted on 12/4/06 at 08:05 PM |
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My brother and i built a gas turbine from a lorry turbo years back in the 1980s .We used a large turbo with angular contact ball bearings and just
filled the housing with oil between runs and then let it run as a total loss system.
If using a bush type bearing you will require some pressure and I would try and use a car oil pump rigged to an electric motor or a tank pressurised
with air or you could maybe use propane to pressurise the oil system if runing on gas.
We used a pump and burner from an oil fired central heating system driven by an electric drill and ran on parraffin.
The hardest part is getting the flame to sustain in the combustion chamber.
Paul.
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MikeR
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| posted on 12/4/06 at 08:10 PM |
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Look at a lot of modern cars - they use electric power steering pumps .........
in fact i've got two in my spare room. One known good and one reconditioned one that doesn't work (long story).
make me an offer on the one that has been reconditioned and doesn't work and i'm sure i'll sell it 
(of course i've got to figure out which is which!  )
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Simon
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| posted on 12/4/06 at 08:10 PM |
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Bob,
Would love to - have a couple of books on the subject and went to the 2 World Jet Masters at Wroughton a few years ago
Have you seen this
http://www.gtba.co.uk/disscussion_groups.htm
http://www.wren-turbines.com/ etc
Quite like the look of this one - gonna read it now
http://www.junkyardjet.com/
And this:
http://www.aardvark.co.nz/pjet/faq.htm
http://www.nyethermodynamics.com/nt1/index.html
ATB
Simon
[Edited on 12/4/06 by Simon]
[Edited on 12/4/06 by Simon]
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dave r
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| posted on 12/4/06 at 08:40 PM |
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good yahoo group on the subject too
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Bob C
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 posted on 13/4/06 at 11:38 AM |
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Cheers me dears
Had a look at the links - some I'd seen, found a useful one with dimensioned photos of the flame tube - excellent!
That wren gear is beaut innit, but I think the engines are over 2 grand.
I'm going with a propane bottle in a bucket of water - use the water to cool the turbo, nice loop there.
I'll post progress on here as the weeks go by - 1st step is combustor - I'll do a 316 stainless fabrication & test it using an
electric blower.
Bob
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britishtrident
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| posted on 13/4/06 at 12:23 PM |
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A Jabasco electric bilge pump is used by some oval racers to circulate final drive oil through an oil cooler.
-------------------------------------
better idea
Thinking about it if the engine is static all you need is a header tank at enough height above the bearing to supply oil.
[Edited on 13/4/06 by britishtrident]
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Simon
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| posted on 13/4/06 at 07:27 PM |
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Bob
These were the guys I saw at the WJM - I was standing about 25 feet away, but in line of exhaust.
Got a nice warm breeze over us (it was a very very cold day).
Fantastic bit of kit.
Saw the Wren engines at the Model Eng Exh in London a few years ago too
ATB
Simon
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