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EasyStar Mods - Spar Hole Reinforcement

Posted by Zach Lovering on April 21, 2009 at 4:59pm
Another simple modification to increase the spar holes strength. I notices that after just a few flights (and a few hard landings) that the spar holes in the wing started to stretch. To fix this problem, I reinforced the holes with fiber washers. (Note that these pictures were taken after I had already done this modification)Materials:1. Hobby knife2. CA3. Two fiber washers (5/16" ID x 3/4" OD)Process:1. Place the spar inside the hole and the washer around the spar so that the washer rest on the root end of the wing. The spar should be fully inserted into the wing so that the washer will be well centered.2. Make a shallow cut around the washer into the wing root to outline where the washer will be installed.

3. Remove foam as needed so that the washer will sit flush to the root end.4. Apply CA on the foam where the washer will be located. Install the washer and let dry.

Tags: easy, easystar, hole, mod, modification, mods, reinforcement, spar, star
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Comments

  • Zach Lovering April 21, 2009 at 6:49pm
    Thanks--and if you're ever in LA or San Diego, it would be great to meet up to fly.
  • Zach Lovering April 21, 2009 at 5:00pm
    You are correct. I meant to say 5/16", which is close to 8mm. I have updated both posts. Thanks for the correction.
  • Zach Lovering April 21, 2009 at 4:29pm
    San Diego is a great place. I will be moving up to LA later this year for work and will miss this place deeply.
  • Zach Lovering April 21, 2009 at 10:54am
    I picked up the magnets from my local hobby store, SureFlite in San Diego. The also sell their items online.
  • Zach Lovering April 19, 2009 at 4:34pm
    Yes there are magnets in the root. I am going to post the instructions for this modification in a couple days. The next post is going to be about upgrading to a composite spar. All of these mods are intended to "beef up" the plane to carry more payload.
  • helitron April 19, 2009 at 2:34am
    Zach, great idea ! Another possibility is to glue a short piece of CFK/GFK tube (20 mm for example) that fits exactly over the wing joiner tube into the hole of the wing.

    Erwin
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