O/T Jet Engines

Discussion in 'General' started by GixxerBlade, Jan 22, 2007.

  1. Mongo

    Mongo Administrator

  2. GixxerBlade

    GixxerBlade Oh geez

    OK it passed today even though it was like 35 degrees outside. +2 HP over the limit of what it was designed for (weak engine but I'll take it) BUT it now has high lube pressure. :( Can't win with this engine.
  3. GixxerBlade

    GixxerBlade Oh geez

    I won!!! Engine passed finally!!! Whewhoo!!!!
  4. RoadRacerX

    RoadRacerX Jesus Freak

    Hope you don't charge shop rate. They could have bought a new engine for the bucks they paid for labor. :Poke: :D
  5. GixxerBlade

    GixxerBlade Oh geez

    Yeah only 11 test cell runs and about 2000 manhours. LOL
  6. JamesG

    JamesG Architeuthis dux

    For future reference:
    Last edited: Feb 14, 2007
  7. g1k

    g1k Well-Known Member

    So what was the problem(s)?

  8. E=MC2

    E=MC2 Well-Known Member

    I can't believe i missed this thread! I'm curious as to what caused the engine to be down 250hp tho!
  9. GixxerBlade

    GixxerBlade Oh geez

    Turbine nozzle areas were changed drastically. We were T5 limited which is like saying that if you run this engine any hotter I'm going to blow myself up so what I had to do was figure out how to change the nozzle areas in such a way that I cool it down so I can spin it faster so it can run hot again, get it? We want the turbine spinning as fast as you can to compress more air to spin the turbine faster to compress more air to spin the turbine faster to compress more air to spin the turbine faster to compress more air to spin the turbine faster to compress more air :D...It's not an exact science especially with temperatures (OAT) in the 30's which requires the engines to produce more horsepower than say on a nice warm summer's day because the air is denser. Get it Nick?
  10. E=MC2

    E=MC2 Well-Known Member

    so your nozzle area was too small?
  11. GixxerBlade

    GixxerBlade Oh geez

    No. It was the right size....according to the engineers. :rolleyes: We have 4 stages of turbine nozzles. Two to direct hot air to the gas generator that powers the compressor rotor and two to direct the remaining hot air to the power turbine (which powers a gearbox which turns a rotorhead on a helo)So typically you would want smaller nozzles with the gas generator to speed the compressor rotor faster and larger nozzles with the power turbine to keep it cool so you don't reach that dreaded temperature limit. Imagine a nozzle to be like your garden hose nozzle, the smaller you make the hole the faster the water streams out.
  12. E=MC2

    E=MC2 Well-Known Member

    so is it a "freepower" turbine or is the shaft directly connected?
  13. GixxerBlade

    GixxerBlade Oh geez

    free spinning power turbine yes.
  14. racer_11

    racer_11 turn one fng

    i worked on army turbine engines for years. said, screw that, working on my dirt bikes got me my $weet tech rep job!!! pioneer uav's rule!!! (and i make sure i'm never around, that's what they teach ya in school!!!!) ha! ha!!!

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