BBerson's Recent Activity

  1. BBerson replied to the thread Wing spar fatigue pattern.

    Could be some aluminum corrosion in the bars. Looks like a typical crashed wing separation.

    Apr 25, 2019 at 12:49 AM
  2. BBerson replied to the thread Provocative Places to Unfold My Wings.

    According to this https://www.howmuchisit.org/how-much-do-movie-tickets-cost/ a movie is $6 to $20, perhaps $8 to $10 average (for two...

    Apr 24, 2019 at 6:01 AM
  3. BBerson replied to the thread Filing weld joints.

    Ok, I didn't mean the " flapper" but rather the " flap" disc shown here, second photo https://en.m.wikipedia.org/wiki/Flapwheel I...

    Apr 24, 2019 at 4:33 AM
  4. BBerson replied to the thread Filing weld joints.

    The 4" 80 grit sandpaper grinder wheels sold at welding stores are aggressive but leave a smoother surface than a grinder. The...

    Apr 24, 2019 at 3:42 AM
  5. BBerson replied to the thread Provocative Places to Unfold My Wings.

    Should definitely trailer your ultralight to Oshkosh, finished or not. Do a forum on it, or the trailer, or whatever. One guy did a...

    Apr 24, 2019 at 2:08 AM
  6. BBerson replied to the thread $84k ultralight Corsair.

    Belite cut the $50k initial price drastically. But I don't know of any others. I noticed ICON has full page ads on the back cover of...

    Apr 24, 2019 at 1:11 AM
  7. BBerson replied to the thread Provocative Places to Unfold My Wings.

    You can fly in to most fly ins and hang around for a while without payment and leave in a while. It is sort of on the honor system. They...

    Apr 23, 2019 at 11:43 PM
  8. BBerson replied to the thread $84k ultralight Corsair.

    New prices have always been ridiculous, so look at used. My first airplane was a Chief basket case for $1500. I bought it with my...

    Apr 23, 2019 at 4:42 PM
  9. BBerson liked radfordc's post in the thread Let's go fly a drone!.

    Here is a homebuilt version of the manned multi-rotor flying machine. [MEDIA]

    Apr 23, 2019 at 4:30 AM
  10. BBerson replied to the thread Beam Theory Explained - How Spars Work.

    My example calculation was with stiffeners at 5" spacing. Which gave a factor or safety of 2.4. Don't know if that is non- buckling or...

    Apr 22, 2019 at 10:30 PM
  11. BBerson replied to the thread Beam Theory Explained - How Spars Work.

    I don't use Excel. Using my hand calculations and a sample procedure on page 411 of Aircraft Structures, I find that .020 2024 web is...

    Apr 22, 2019 at 3:58 PM
  12. BBerson replied to the thread German flying wing.

    And single seat has best visibility. Less CG problems.

    Apr 21, 2019 at 10:09 PM
  13. BBerson replied to the thread Boeing - Design Issues....

    I watched another Smithsonian Air Disasters episode last night about an Airbus 330 that pitched down so hard several passengers were...

    Apr 21, 2019 at 3:44 PM
  14. BBerson replied to the thread Redrives for most commercial engines..

    Yes, an actual customer with a custom aerobatic application should contact Ace for help with the custom application. This was explained...

    Apr 20, 2019 at 7:46 PM
  15. BBerson replied to the thread Torsional Vibration and Resonance - Basic Theory and Issues.

    Are the balls rubber or steel or aluminum? They look grey color.

    Apr 20, 2019 at 2:43 PM
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