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DumHed
Experienced Roboteer
Joined: 29 Jun 2004
Posts: 1219
Location: Sydney
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Jet engine
In late '99 / early 2000 I built a basic turbine engine using a Toyota CT20 turbo and a combustion chamber made from various copper pipes and some sort of water heater casing I bought at a scrap metal shop.
It worked, but the chamber was too small to get the turbo up to a proper idle speed, although it did self sustain.
The flame extended too far past the end of the combustion chamber and caused the turbine to run too hot.
Recently I became inspired about turbines again so I put together a new engine on friday night (which might be a new record, 24 hours for a complete build? )
I used a hotdog exhaust resonator as my combustion chamber, with a plate welded on one end to mount the fuel injector and spark plug, a steam pipe elbow on the other end with a flange for the turbo, and a pipe welded in the side to connect to the compressor outlet.
The fuel (LPG) is injected via a car LPG mixer ring, and the spark plug protrudes through the middle of it.
The engine fires up quite easily and was happy to sustain 10psi of pressure, but made some nasty noises at 12-13psi so I shut it down.
You may notice what looks to be a garden hose connected to the turbo oil feed
I figured that since it has hydrodynamic bearings, as long as the pressure and flow are high enough, water should work instead of oil.
The end result is that yes it does, but the tap can't provide enough pressure for full power running.
I'll be building a proper oil system and changing to a larger turbo in much better condition this week.
I might have to bring it to the next event I can make it to _________________
The Engine Whisperer
- fixer of things
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Mon Nov 21, 2005 3:45 pm |
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