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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

  • Moderator
    Dwgsparky June 8, 2013 at 8:24am
    I will send some pictures / video etc when I get back to my pc
  • 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?

This reply was deleted.