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  1. #1

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    How its made, Model turbine engine

    Big difference in how JETCAT assemble there engines cool.

    http://www.youtube.com/watch?v=I3jE-PXV-68
    It's a hobby - keep it simple

    www.332ndredtail.com

  2. #2

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    RE: How its made, Model turbine engine

    Very cool!
    Thanks.

  3. #3
    Xairflyer's Avatar
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    RE: How its made, Model turbine engine

    Excellent find, terminology is interesting, personal favourite is, threaded slot

    Details of the balancing will confirm to some why there are grinding marks on the compressor wheel, that was discussed in another thread.
    www.letterkennymodelflyingclub.com
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  4. #4
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    RE: How its made, Model turbine engine

    What is the big difference you mention though? Don't most do it basically the same way?
    The bitter taste of poor quality lingers long after the sweet taste of low price is forgotten.

  5. #5
    Xairflyer's Avatar
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    RE: How its made, Model turbine engine

    There is also a video there on the manufacture of a BVM Ultra Bandit.
    There is something wrong with the sound, but it can be heard faintly if you turn everything up full

    http://www.youtube.com/watch?v=DVfUiR2WZWw&NR=1
    www.letterkennymodelflyingclub.com
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  6. #6

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    RE: How its made, Model turbine engine

    ORIGINAL: AndyAndrews

    What is the big difference you mention though? Don't most do it basically the same way?
    I remember watching Rei or albert back in RAM days, The outer casing, the tail cone and the starter cover was the last to be installed. But then again Jetcat uses a different type of fuel injector.

    Excellent find, terminology is interesting,


    http://www.youtube.com/watch?v=ykpVsGYSi9E
    It's a hobby - keep it simple

    www.332ndredtail.com

  7. #7
    Couch Potato's Avatar
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    RE: How its made, Model turbine engine

    Oh no, the secret's out of the bag !

    Every man and his dog will me making miniature turbines now

  8. #8
    Xairflyer's Avatar
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    RE: How its made, Model turbine engine

    You will find in most turbines the case is what holds the NGV (stator plate in video) in the correct place so normally needs to be fitted before turbine itself.
    This as well also allows bearing change with minimal stripping
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  9. #9
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    RE: How its made, Model turbine engine

    anyone notice the dude is bleeding all over the engine ?? lol ... is that the JetCat secret ??? should be red, not purple


    ~V~
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    - working model MFD & HUD, 3D design & printing, CNC, Laser-cutting
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  10. #10

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    RE: How its made, Model turbine engine


    ORIGINAL: wojtek

    anyone notice the dude is bleeding all over the engine ?? lol ... is that the JetCat secret ??? should be red, not purple


    ~V~
    He also put a band aid at the end
    It's a hobby - keep it simple

    www.332ndredtail.com

  11. #11
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    RE: How its made, Model turbine engine

    This short clip was pretty amazing. Too bad the turbine manufacturers don't make an informative DVD like this and package it with every turbine they sell. It would give you an Idea of what makes your engine do what it does. A short clip on setting fail safe, ecu operation and which way to orient fuel lines (follow the arrows) etc for those visual learners would complete the DVD. Just a stray rambling...............
    Ken H
    \"Just go fly something\"

  12. #12
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    RE: How its made, Model turbine engine

    wow super clip, one wonders why they cost so much with such a simple design [:-]
    Contest Director AMA # 8394

  13. #13
    Xairflyer's Avatar
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    RE: How its made, Model turbine engine


    ORIGINAL: KXH121

    This short clip was pretty amazing. Too bad the turbine manufacturers don't make an informative DVD like this and package it with every turbine they sell. It would give you an Idea of what makes your engine do what it does. A short clip on setting fail safe, ecu operation and which way to orient fuel lines (follow the arrows) etc for those visual learners would complete the DVD. Just a stray rambling...............
    I believe this is what Hobbyking are planning to do with their new turbine.
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  14. #14

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    RE: How its made, Model turbine engine


    ORIGINAL: Xairflyer


    ORIGINAL: KXH121

    This short clip was pretty amazing. Too bad the turbine manufacturers don't make an informative DVD like this and package it with every turbine they sell. It would give you an Idea of what makes your engine do what it does. A short clip on setting fail safe, ecu operation and which way to orient fuel lines (follow the arrows) etc for those visual learners would complete the DVD. Just a stray rambling...............
    I believe this is what Hobbyking are planning to do with their new turbine.

    6 hours to manufacture @ $1.00 per hour (China's industrialized city average rate) brings the labor to $6.00... They already manufacture turbine components in China for the Germans. Yep, estimate a street price of less than $1500:-)

    Gerry
    (wishing out loud)

  15. #15

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    RE: How its made, Model turbine engine

    Once again guys. If your only going to sell 500 of them you cant get by making 20% profit on one. They also left out the pesky part about turning, grinding and treating the shaft, casting and working the NGV and wheel and CNCing the compressor. THere is also the part that is always left out called R&DOh yeah I forgot the chinese dont bother doing that part themselves. Scotty
    \"If you ain\'\'t crashed-You ain\'\'t flown\"

  16. #16

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    RE: How its made, Model turbine engine

    Hey Scotty,

    Can you "like" a post on RCU?

    Good to see one person has a clue.
    John Redman
    JetCat USA

  17. #17

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    RE: How its made, Model turbine engine

    Anyone bought a multi axis CNC machine lately? Anyone undergone the training and experience required to accurately and efficiently operate one? It's a real serious investment. Then we have product liability insurance, which is something a reputable turbine shop will have to play CYA after a consumer does something stupid. Of course Hobby King, being remote in China, will likely circumvent that part of the consumer responsibility process.
    Never lie, and never minimize or gloss. Tell it like it is and let the pieces fall where they may. The truth always wins.

  18. #18
    Xairflyer's Avatar
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    RE: How its made, Model turbine engine

    www.letterkennymodelflyingclub.com
    www.jmaireland.com

  19. #19
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    RE: How its made, Model turbine engine

    From what I can imagine the materials and labor should be @ $150

    Sell a $2000 engine, deduct labor and materials of $150
    Enjoy a profit of $1850 and take the rest of the week off.

    Whan a $3600 engine is sold, then it's a party added to the week off.

    But those CNC and router machines cost a bunch.
    We in the Federal Government have no sense of humor that we are aware of.

  20. #20

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    RE: How its made, Model turbine engine

    I give up. Scotty
    \"If you ain\'\'t crashed-You ain\'\'t flown\"

  21. #21

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    RE: How its made, Model turbine engine

    How come every time Airplanes400 gets involve the thread dies

  22. #22

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    RE: How its made, Model turbine engine

    It's a hobby - keep it simple

    www.332ndredtail.com

  23. #23

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    RE: How its made, Model turbine engine

    but, but, he is SO official though, look at that emblem from the State Department [X(]

  24. #24

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    RE: How its made, Model turbine engine

    I bet O'bummer hired him

  25. #25

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    RE: How its made, Model turbine engine

    Just wanted to chime in here. The metals are the most expensive part of the turbine. I would think that the turbine side is using either inconnel or monel for the hot section and either aluminum or stainless for the compressor section.

    The machining of these parts is tricky as well and more than likely done on a CNC machine with multi axis. Once programmed correctly the parts can be milled in a few hours.

    A jet engine as simple as it seems is a very complex mechanism and with the RPM's they turn must be robust enough to handle the stress not only from heat but from vibration and centrifugal force. If inferior metals are used in it's construction the compressor side and turbine side are susceptible to creep. Basically what this does, is the blades tend to grow and will eventually contact the turbine or compressor case internally and will FOD the engine.

    I don't know what China is using in their engines nor do I know what jetcat and others use. However the guys that have been around for awhile have a pretty decent track record. The jury is still out on the China product.

    Profit aside for what the modeler is getting for around 2k to 5k is a bargain when it comes to model turbines.

    On a business jet or airliner the minimum cost of 1 engine brand new is around $750,000 (Small turbine) and the last time I had to purchase an engine,a (CF-34 engine same one on the A-10 tank killer) that goes on a business jet (Challenger 601-605 models) cost around 2.5 million per side and cost anywhere from 250,000 to 1.2 million to overhaul.


    Regards
    Glenn Williams
    When all else fails pull the right stick down!


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