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  1. #1
    BaldEagel's Avatar
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    Jet-Teng L39 for P20

    Just received my L39 from Singapore through RC Warbirds, very nice bit of kit, only one bit of damage to the gel coat under the intakes other than that a pleasant experience to un pack, nice 3mm metal control rods with metal quick links and fibre glass horns which was all a nice surprise, will detail more when I start the build.

    Mike

    Can't seem to upload images at the moment will try later.
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  2. #2
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Some achive pics to be going on with, flaps are live hinged, canopy catch and canopy already fitted, large air intakes will need only some small mods to get one of GBR Jets Duo tanks in and the tail pipe will be an easy fit as well.

    Mike
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  3. #3
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Short cut to RC Warbirds 90mm EDF site: http://www.rc-warbirds.com/index.php/cPath/118_121

    Mike
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  4. #4
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    RE: Jet-Teng L39 for P20

    Hi Mike,

    Congratulations on the L-39. Will be following your thread with interest!

    A couple of questions: Turbine?, Retracts? Tail Pipe?

    I´ve got a Savex L-39 with a Wren 44 Gold. Just need to do a couple of minor tasks before its ready.....

    This one of yours is smaller than the Savex...you haven´t considered using EDF instead of turbine?

    /Pete
    "The Last Boomer has gone"!

  5. #5
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Hi Pete

    Turbine will be a JetCat 20 as per the title of the thread, no I have not considered EDF, I have a couple and the Viperjet fly's so pure it can't be beaten.

    Retracts will be E-Flight retract.

    Tail pipe will be from GBR Jets made for the Habu, have not decided on twin or single wall yet, there is a lot of dia in the rear fus and I think the twin wall will not be needed.

    The cloaking device will be in the tail, the problem I always find with the cloaking device is the feed back into the Tx, if you put the Tx down whilst it is switched on, I can never find the Tx again, gone through 10 Tx this month alone.

    Will hopefully get the pics up today.

    Mike
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  6. #6
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Managed to get a few uploaded, but still not able to get all of them onto the server? having to load one at a time. Arghhh

    Panel lines and rivet detail evident in these pics.

    Mike
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    My Gast is Flabered.
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  7. #7
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Thought others may like to know that the bare airframe weighs in at 1350grams, retracts should arrive today, I will weigh it again with the retract, pipe and fuel cell, at the moment it copares well with the Habu 32.

    Mike
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  8. #8
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Few more pics, the Habu Tam designed trailing link gear from Boomerang jets has arrived, simple job to get the link pointing backwards as it needs to so that it can fit into the already cut wheel wells, nose leg is over long, but that will be easy to modify as well.

    The flap is live hinged and once freed up can easily accommodate 90degs of movement, nice nose detail on it, possible going to mount the horns internally, still got to decide on the servo's I am going to use, probably Hitec HS85MG's.

    If anyone wish's to see something specific please ask and I will see what I can do.

    Mike
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  9. #9
    Cliffhanger's Avatar
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    RE: Jet-Teng L39 for P20

    The L-39 flies great with a p20

    Here is the video of the maiden:

    [youtube]http://www.youtube.com/watch?v=wnKeJFFHdWw&hd=1[/youtube]

    And here's one of the second flight which I did today:

    [youtube]http://www.youtube.com/watch?v=pTBC1TldSMo[/youtube]

    You won't be disappointed.

    Kind regards,

    Cliff

  10. #10

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    RE: Jet-Teng L39 for P20

    Isnt that the same L39 as the Top Gun one ?

    Dennis

  11. #11
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Cliff

    Thought it would be a good platform for the P20 as you have got there first, perhaps you would like to share your set up?

    Dennis

    No idea, if it is then Top Gun obtain it from Jet Teng who are the manufacturer in Singapore.

    Mike
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  12. #12

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    RE: Jet-Teng L39 for P20

    How much did you pay for shipping? I'm tempted by one of their Hawks.
    www.ukjetshop.com
    UK Dealer for Bavarian Demon and Emcotec. Reseller of Ashlock connectors,

  13. #13
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Can't remember exactly, but it was ridiculusly inexpensive, something like 50EU, but got hit for tax, you need to PM me.

    Mike
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  14. #14

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    RE: Jet-Teng L39 for P20


    ORIGINAL: BaldEagel

    Cliff

    Thought it would be a good platform for the P20 as you have got there first, perhaps you would like to share your set up?

    Dennis

    No idea, if it is then Top Gun obtain it from Jet Teng who are the manufacturer in Singapore.

    Mike

    Here is the Topgun one available in the UK

    http://www.cmldistribution.co.uk/cml...tId=0000005135

  15. #15
    Cliffhanger's Avatar
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    RE: Jet-Teng L39 for P20

    Since the original L-30 came without a manual, I have taken the time to write one during my build.
    I can upload pictures of the turbine install.
    I have ordered a 32 cm long dual wall tailpipe directly at JetCat.
    The ideal diameter of the tailpipe is 45mm.

    Here's the manual:
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  16. #16
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    ORIGINAL: bigplumbs


    ORIGINAL: BaldEagel

    Cliff

    Thought it would be a good platform for the P20 as you have got there first, perhaps you would like to share your set up?

    Dennis

    No idea, if it is then Top Gun obtain it from Jet Teng who are the manufacturer in Singapore.

    Mike

    Here is the Topgun one available in the UK

    http://www.cmldistribution.co.uk/cml...tId=0000005135

    Dennis

    The Top Gun L39 has a built up wing film covered, the Jet Teng as shown in the photo's above is all composite and carbon reinforced.

    Cliff

    Thanks for the infomation.

    Mike
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  17. #17
    Cliffhanger's Avatar
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    RE: Jet-Teng L39 for P20

    Here are some pics of the install:

    I have used the following fuel tank:
    Graupner 1340 500ml Tank
    Graupner 133 fuel resistant plug





    Don't forget the tiptank LEDs.
    they make this jet complete..


  18. #18
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Cliff

    Did you reinforce the UC wing mounts? I am thinking that the blocks just glued to the wing surface may not be strong enough for my rough patch, going to make a couple of wing ribs out of ply to add reinforcement to a couple of 5mm ply mounts, will put pics up when I do it.

    I notice from your pics that you have not used a 1.1M long fuel feed line as recommended by JetCat, do you get any pulsing of the turbine? I certainly do on the Kero feed to the starting plug its very noticeable.

    Mike
    My Gast is Flabered.
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  19. #19
    Henke Torphammar's Avatar
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    RE: Jet-Teng L39 for P20


    ORIGINAL: BaldEagel

    do you get any pulsing of the turbine? I certainly do on the Kero feed to the starting plug its very noticeable.

    Mike

    How do the pulsing look/sound like IRL? do you see a differ in thrust or a pulsating noise from the engine?[X(]
    /Henke
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  20. #20
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Its a definite pulsing of the turbine on Kero start up as soon as it switches over to main fuel feed (1.1M tube) the pulsing stops.

    Mike
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  21. #21
    Henke Torphammar's Avatar
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    RE: Jet-Teng L39 for P20


    ORIGINAL: BaldEagel

    Its a definite pulsing of the turbine on Kero start up as soon as it switches over to main fuel feed (1.1M tube) the pulsing stops.

    Mike
    Okey, thanks :-) btw did't they suggest a 400mm coil before?! changed to 1.1m now?
    /Henke
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  22. #22
    Cliffhanger's Avatar
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    RE: Jet-Teng L39 for P20

    Yes, i have the 1.1 meter fuel line nicely roled up under the radio tray.
    The extention is between the pump and the valve.

    Can you please make a drawing of the undercariage ribs?
    I need to update mine to.
    the blocks have too little area to devide the stress.


    Thanks,

    Cliff

  23. #23
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20


    ORIGINAL: Henke Torphammar


    ORIGINAL: BaldEagel

    Its a definite pulsing of the turbine on Kero start up as soon as it switches over to main fuel feed (1.1M tube) the pulsing stops.

    Mike
    Okey, thanks :-) btw did't they suggest a 400mm coil before?! changed to 1.1m now?
    Only ever seen the recommended 1.1M fuel line length in the P20 manual.

    Cliff

    Will post pics as soon as I do them, maybe this afternoon.

    Mike
    My Gast is Flabered.
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  24. #24
    Henke Torphammar's Avatar
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    RE: Jet-Teng L39 for P20


    ORIGINAL: BaldEagel


    Only ever seen the recommended 1.1M fuel line length in the P20 manual.
    Thanks alot :-)
    /Henke
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    Ready2fly Yak-130 "Mitten", Lambert Kolibri T35 - Пенопласт летчик-истребитель

  25. #25
    BaldEagel's Avatar
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    RE: Jet-Teng L39 for P20

    Made up the false ribs for the UC support, I forced a piece of paper into the opening and used my fingernail to trace the outline onto the paper then transfered that onto the ply for the ribs, the small piece of ply marked with an X is saved to fill between the wing skin and UC support. I used the existing blocks supplied with the L39 as they are of good quality, just cut the balsa blocks underneath them at the width of the ply false rib to form the tenon joint.

    Mike
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