• Sprog question

    Posted by Roger Larson on March 14, 2023 at 10:27 pm

    So I have heard different people say different things about spogs and how tight to make the velcro that holds them. What does a trike pilot need to know about Sprogs?

    Doug Bo replied 8 months, 1 week ago 5 Members · 6 Replies
  • 6 Replies
  • Jim Garrett

    Member
    March 14, 2023 at 11:29 pm

    Larry or Wes has a video showing what sprogs do on the ground and in flight. Worth watching. It is on youtube.

    • Jeff

      Member
      March 22, 2023 at 8:14 pm

      link?

  • Doug Bo

    Member
    July 15, 2023 at 8:40 pm

    From my North Wing manual …

    put the Velcro loop around the end of the sprogs. Leave Velcro loops slightly loose (approx. 1/2” gap)

    • Larry Mednick

      Moderator
      July 17, 2023 at 11:01 am

      The sprog loops have little bearing on how the sprogs work. The reason for the Velcro being left loose is so the Velcro doesn’t get hung up as the sprog passes in and out as the wing flexes.

      The sprogs were only active in this video when he was on the ground. After that, they had no purpose during this demonstration. They are critically important in the air to prevent a tumble during negative Gs. But 99% of flights are 100% positive G load flights. Until that one time they activate (cables go tight) and keep pitch stability.

    • Doug Bo

      Member
      July 19, 2023 at 4:50 pm

      Thanks Larry for the explanation

  • Doug Bo

    Member
    July 15, 2023 at 8:41 pm

    Video from Paul H.

    https://youtu.be/ip5GDKc4hzc

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