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  1. Topaz

    The Modern Tool Crib - A Poll

    Over in the Everlasting Gobstopper "21st Century Volksplane" thread, the question has arisen regarding the use of 3D printing and things like NC routers for a "modern" kit/plansbuilt plane. Lots of opinions have been floated, but I'm curious to see what the larger group thinks, objectively. So...
  2. Topaz

    ESA 2023 Western Workshop Lecture Videos

    The Experimental Soaring Association held its 2023 Western Workshop symposium at Tehachapi's Mountain Valley Airport on September 2-3, 2023. We have videos of most of the lectures, posted to the ESA YouTube channel with permission of the speakers. This thread will link to those videos as I...
  3. Topaz

    Acme

  4. Topaz

    Learning about structures

    I don't want to derail oriol's excellent thread, but I know there are other people out there like me, just starting on this journey oriol is taking who might also benefit from the question: @wsimpso1 do you have a recommended reading list for structures, on the path you describe above? I've...
  5. Topaz

    Experimental Soaring Association 2023 Western Workshop & Symposium

    The 2023 Experimental Soaring Association Western Workshop and Symposium will be held this year at Mountain Valley Airport (L94) in Tehachapi, California, Saturday, September 2nd and Sunday, September 3rd. AirNav: L94 - Mountain Valley Airport Mountain Valley Airport · 16334 Harris Rd...
  6. Topaz

    Trailer Design - Resources?

    Designing a trailerable airplane to fit a specific storage space means designing (or acquiring) a trailer to fit that specific storage space, and then the airplane fits inside of it. This is the "Russian Nesting Dolls" approach to aircraft design. ;) I'd like to at least sketch out the sort of...
  7. Topaz

    2021 Experimental Soaring Association Western Workshop - Trip Report

    I've just posted a trip report for this event in the Soaring section, here: Experimental Soaring Association 40th Western Workshop Full details and a photo album from the event.
  8. Topaz

    Predator 670cc Horizontal-Shaft V-Twin No Longer Available?

    Moderator Note: This discussion was forked off from this larger thread, as a sidebar. --------------------------------------------------------------- The Predator 670cc horizontal shaft engine seems to no longer be available for sale from Harbor Freight. At first I thought it was just...
  9. Topaz

    Biometric Data

    For those of us interested in aircraft design, getting useful biometric data - body dimensions - is always a challenge. The typical homebuilt designer measures him or her self, and calls it a day. That's fine except if you're someone like Ken Rand, designer of the classic KR series of...
  10. Topaz

    Beauty

    All right, which one of you guys has your beautiful Great Lakes parked at POC today?
  11. Topaz

    ESA Western Workshop 2020 Canceled

    Hello all, I believe it's been mentioned "unofficially", but here's the official post: The board of directors of the Experimental Soaring Association (ESA) has made the difficult decision to cancel the 2020 ESA Western Workshop in Tehachapi, California. A formal announcement was e-mailed to the...
  12. Topaz

    Mooney appears to be in big trouble

    From AOPA: https://www.aopa.org/news-and-media/all-news/2020/january/07/mooney-workers-told-to-go-home
  13. Topaz

    Where there's a will, there's a way

    Submitted for your amusement, from the Twilight Zone.
  14. Topaz

    TESTS and IMPROVEMENTS - *** READ THIS FIRST BEFORE POSTING ***

    The intent of this section is to describe and discuss actual tests and/or improvements you have performed yourself in some area of homebuilt aircraft design, construction, maintenance, or operation. It's not intended for links to third party research or modification work. We have Aircraft...
  15. Topaz

    Sailplane altitude record now above 62,000'MSL

    The Perlan Project set another altitude record for sailplanes: 62,473'MSL Look ma! No motor! :gig: https://www.avweb.com/avwebflash/news/Glider-Altitude-Record-Now-62473-Feet-231439-1.html
  16. Topaz

    Announcing the Experimental Soaring Association Western Workshop 2018

    The Experimental Soaring Association is holding its 2018 Western Workshop on Labor Day Weekend, August 31st through September 3rd, 2018, at Mountain Valley Airport in Tehachapi, CA. Lecture titles include: Ultralight Sailplanes Soaring in Tehachapi Is There a Case for a Club-built Two-place...
  17. Topaz

    Request for Information - Winton "Jackaroo"

    We were talking about simple ultralights the other day, and about the same time member jany77 posted a thread with a video of a neat little ultralight I'd never seen before. Almost nothing remains uncovered here at HBA for long, and member rotax618 identified it as a "Winton Jackaroo" or its...
  18. Topaz

    The Realities of Air-Camping

    One of the goals on my plate for the next couple of years is to get my Sport Pilot license. I love soaring, but let's face it - it's not at all useful for even recreational travel. I'm getting tired of having to drive to aviation events that are a fairly trivial flight away, but a dreary long...
  19. Topaz

    "Typical" VW wooden prop weight?

    Hi all, Can anyone provide a ballpark weight for a "typical" 56-inch diameter wooden, fixed-pitch prop as is used in most VW conversions? Don't need it down to the ounce; just need a ballpark value. Ran the usual list of suppliers on the intertubes, but while everyone is happy to give...
  20. Topaz

    Cozy IV Canopy Dimensions

    Hello all, I have a quick question that I'm hoping someone in the group can answer. What are the outside dimensions for the Cozy IV canopy? I don't need the shape, just the width at the widest point, height from the rear edge to the bottom, and overall length. I know that the canopy is...
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