Twister goes Molded

Discussie in 'HLG/DLG/F3K' gestart door Alex Hoekstra, 19 dec 2007.

  1. de materiaalverzamelaar

    de materiaalverzamelaar

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    Le Twister

    Bon soir Alex,

    Mais oui Le Twister est tres beau et un bon planeur
    A bientot en L'Allemagne
    Au revoir

    Le collecteur du materiaux
     
  2. Bas B

    Bas B

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  3. Alex Hoekstra

    Alex Hoekstra

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    Hi Alex

    habe ein kleines Video vom Twister gemacht ->
    RZhd5-1NvZQ[/media] - Twister DLG

    Der Twister ist so wendig und agil, Habe auf Querruder +-18mm und
    auch die Bremsen (35mm) wirken sehr gut.

    Cu Martin
     
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  4. PWR

    PWR

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    [​IMG] [​IMG]
    [​IMG] [​IMG]

    Het is een echt goede film, kan niet wachten.

    Regards
    Palle
     
  5. Alex Hoekstra

    Alex Hoekstra

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  6. Alex Hoekstra

    Alex Hoekstra

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    Klein tipje van de sluier..........
    [​IMG]
     
  7. PWR

    PWR

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    Hey Alex. It looks damn good, thank you for the picture. :-D
     
  8. Sadkingbilly

    Sadkingbilly

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    Wow, mooi zeg... Ben benieuwd!
     
  9. Sadkingbilly

    Sadkingbilly

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    En, nog meer tipjes van sluiers, alex? ;)
     
  10. Alex Hoekstra

    Alex Hoekstra

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    De vleugel op de foto was de onderkant van de kist van PWR. Hij had daar speciaal om gevraagd. Inmiddels al lang en breed in Denemarken.
     
  11. PWR

    PWR

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    Hi there

    Yes - it's my new Twister and it is really nice.

    I've been out and make the first flights, and it looks very promising.

    Best regards
    Palle
    [​IMG]
    [​IMG]

    "Thanks Loet"
     
    Laatst bewerkt: 17 feb 2009
  12. PWR

    PWR

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    Hi
    After a total lack of radio contact, today my new Twister look like this.
    [​IMG]
    [​IMG]
    [​IMG]




    Well I think it can be repaired, but how? ​


    What fiber do I need and how should it be wound on the boom?
    Which direction should the fibers lie.
    How far past the fracture site should I go with the fibers and how many layers can I develop?
    Can Alex or someone else come up with good advice for this repair. ​

    I would say that the Twister is far the best DLG'er I've ever flown, and it can not do to radio failure, but it seemed as I am rather unlucky at the moment.
    regards
    Palle​
     
  13. Bas B

    Bas B

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    Palle,

    I gues Alex or Loet will provide repair instructions (you also can consider to go for a new fuse).

    Most important is to find the cause of the radio failure. What equipment do you use and how is the antenna positioned in your Twister?

    Bas
     
  14. Frans Bal

    Frans Bal The First Aviators

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    Hello Palle,

    That doesn't look very nice.
    Your'e right it can be repaired.
    Here is how i have done it.

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    Frans
     
  15. Loet Wakkerman

    Loet Wakkerman

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    Sad Story Pelle.

    Once I have repaired a fuse and that was easy.

    - first, make the fuse as straight as possible (using your eyes) and solve the puzzle with the broken fibres. Put them nicely together and fix it using 10 seconds glue (cyano) on some points. Only on some points, lets say 3 all around.
    - then look again. If it is still straight fix the rest of broken fibres with cyano.
    - sand it so the fuse is smooth again.

    Now there are several possibilities.
    -I know that one of the Dutch pilots repaired his fuse with kevlar cloth. 1 cm wide and wrapped around the broken part and overlapping for 50%.
    -use UD carbon fibres in the length of the fuse and of course all around. I did it like that and the fuse is still OK.
    -use carbon cloth and do the same as with the kevlar.

    Use 24 hours epoxy to wet the fibres and firmly wrap plastic tape around the fibres. Making it smooth and pressing out the epoxy which is too much.

    Follow the link for more (other) information on:
    Wie Kohlerumpf reparieren - RC-Network

    It's a pity you don't live close because it is a matter of less than an hour.

    Good luck

    Loet
     
  16. Alex Hoekstra

    Alex Hoekstra

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    After al the good advice there is not much to ad anymore. If you want i can send you a litle carbonfibre same as the fuse is made from.

    Alex
     
  17. Bas B

    Bas B

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    Additional info.

    - The method used by Frans (first 4 photos) is perfect for fuses having fishing rods, but can not be used for a Twister because this fuse it is not perfectly round inside.
    - I should prefer a full carbon repair using UD carbon fibers and not using Kevlar (a carbon repair looks much better on a carbon fuse). The Kevlar repair Loet refers to was made during a contest where no other material was available.
    - For alignment I use medium cyano and for the final fixation I use thin cyano.
    - If a fuse breaks it fails on the side that is under pressure. A fuse repaired with cyano can withstand pressure but can not withstand tensile (Note: make absolutely sure that no parts are missing in the broken fuse, especially at the side of the fuse that is under pressure during launch). The main (but not the only) function of the layers you add during the repair is to withstand tensile. This is why the thickness of the repair can be less than the thickness of the fuse, but better a layer too much…….
    - The required width of the repair depends on the thickness of the repair and on how good the repair attaches to the fuse, how thicker the repair and how worst the attachment how bigger the overlap should be (if the overlap is big enough the additional layers breaks on tensile before sheared from the fuse). If more layers are used start with the smaller ones and end with the bigger ones.
    - Finally make sure that no sharp edges are inside the repaired fuse that can damage your Dynema.

    Bas
     
    Laatst bewerkt: 22 feb 2009
  18. PWR

    PWR

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    Hello
    Thanks for all the good advice.:worship:
    I will start the repair today so it can fly again.

    I also have to solved the problem with the radio.


    I use a Schulze 8.35 receiver, which I've used in another model without problems for over a year.
    I chose this particular receiver because it has always worked well.
    The antenna is outside on the underside of the boom, as I have it on all my models.
    Of course, some 12 cm of the antenna is running inside the body, before it comes out, but that is like that on all my models and it gives no problems.

    Should I try to extend the antenna with 12 cm to see if it can make a difference?

    I will of course ad a new receiver before I fly again.


    After the radio failure with the Twister, I flew for 2.5 hours with my other models and then everything worked fine, so it's not in my transmitter the problem is.

    Alex
    Thanks for your offer, it is very nice of you, but I have material so I can make the repair.
    PS. Have you received the package from me?

    Best regards
    PALLE
     
  19. Alex Hoekstra

    Alex Hoekstra

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    Over here we mostly let the antenna run through the boom and extend it with enamelled copperwire and let it run out the boom at the back. This way the antenna is running completly in free air nowere to be shielded by carbon fibre.

    Yes i got your package.
     
  20. Bas B

    Bas B

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    Hi Palle,

    already repaired the fuse (and was the repair power-launch proof)?

    Best regards,
    Bas
     

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