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Skywalker X8 hand injury

Posted by Tommy Larsen on June 8, 2013 at 12:38am

3689529051?profile=originalEverytime i launch my X8 it's never any problems. That was until i mounted a bigger propeller. I went from 13x6 to 14x9.5 and my plane "suddenly" went out of my hand much faster than before! The result is a painful hand and a lot of thinking :) Maybe some of you guys should think twice before you hand launch your new X8 or similar...

Now i'm considering several options:

1. Build a catapult

2. Hand launch engine off and throttle up after the wing has left my hand

3. Build a device where i can take off in a 30 deg. angle just by using the propeller power itself?

4. Any other ideas??

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Comments

  • Joe Jackson June 8, 2013 at 7:42am
    I use gloves like these for hand launching flying wings,have yet to find out it they work or not.
    Cut Resistant Gloves,Yellow,L,PR
    View Larger
    Cut Resistant Gloves,Yellow,L,PR
    Item # 1AJ44
    Cut Resistant GlovesUncoated Coating Material, Kevlar(r) Lining, Cut Resistant Yes, Abrasion Resistant Yes, Puncture Resistant No, 2 ANSI/ISEA Cut Level
     
     

     

     

    They only cost a few dollars
     
  • Moderator
    Gary Mortimer June 8, 2013 at 7:29am

    Thanks for posting this, safety reminders are always good. I hope you heal quickly.

  • Tommy Larsen June 8, 2013 at 6:18am

    I don't have the RPM but i had 100% throttle and use a 4s Lipo battery on a 650kv engine

  • Distributor
    Stefan Olofsson June 8, 2013 at 6:01am

    Thanks! I think the RPM of the motor is needed as well. Really nasty cuts :-/

  • Tommy Larsen June 8, 2013 at 5:55am

    38mm between the cuts and 14x9.5 inch propeller. Be my guest :-)

  • Distributor
    Stefan Olofsson June 8, 2013 at 5:45am

    In theory, i think you should be able to calculate the launch speed if you measure the distance between the cuts :-)3692738421?profile=original

  • Tommy Larsen June 8, 2013 at 5:28am

    @Jared: I will think about the winf launch

    @Jason: I saw others fly with a much larger prop than myself so i wanted to try. I had one test before my hand injury and it looks very good with that prop size. Longer flying time on same mAh.

    @Dwgsparky: I would like to see pictures/videos of your catapult and consider buying one.

  • Moderator
    Dwgsparky June 8, 2013 at 5:15am
    A catapult is the safest option for flying wings, even the smaller X5 can do a lot of damage. They are safe and predicable. I have a design for a catapult for an X8 or smaller plane that works and is low cost, you can also buy the finished product or a short kit. Send a message. I hope your hand heals quickly.
  • Jason Wise June 8, 2013 at 4:33am

    Why a bigger prop in the 1st place?

  • Jared Reabow June 8, 2013 at 2:55am

    Wing launches allow you to throw much harder and they also allow you do do spin launches where you spin on the spot for extra speed and launch, mainly for large models that have a high stall.

This reply was deleted.