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  1. Hephaestus

    BD-5 - Why is it so engrained in our psyches?

    So I got to watch a funny sight this week... Had almost 20 people in the hangar; having a longer serious discussion about a destructive test that had - unexpected outcomes. In rolls my hangar neighbor - with his latest bd-5(a? short wings ) acquisition, complete with a fresh layer of barn...
  2. Hephaestus

    Test pilots - When to bring one in?

    So, MD-RA visit yesterday. Got a lovely autographed pre-cover inspection now. So only 99% left to go The inspector suggested I should already have brought a test pilot into the fold. (He's rightfully concerned about cleansheet airframe + "less proven" engine). Curious - what's the usual...
  3. Hephaestus

    process help request

    Ok, test parts are killing me... Wondering if someone has some more experienced hand ideas that they'd be willing to share. This is that hybrid topology optimized layup that I've been playing with. Drag knife cut cloth , wetted out, CNC routed pvc foam cores, laid up into a mold - vacuum...
  4. Hephaestus

    Carbon Nanotube Reinforcement

    Not sure if it'll work; but what about adding carbon nanoparticles added to the resin matrix? Kind of a middle ground solution but if it works for you... It looks like they're looking at combining with others to get more flame/heat resistance now. Might be worth a discussion...
  5. Hephaestus

    CNC fabric cutter?

    Curious about some options to cnc cut carbon, kevlar and fiberglass fabrics. Of course the local composite supplier has some crazy 5-6 figure commercial offerings... Yes, engineer found some new FEA module... After 2 days in the shop, I realize there's no way to hand cut these accurately/ I...
  6. Hephaestus

    S Littner Plans- gone or new contact info?

    So Slittneraircraftplans.com is now redirecting to website resellers, the two email addresses I had (@ the website and @videotron ) are bouncing... Anyone know their actual status? Folded or just snafu? Thanks
  7. Hephaestus

    X-Winder

    There's an 8yr old thread for the original kickstarter... Figured maybe worth reposting. They're optionally up to 4 axis, and 2 rolls capability now. Was hunting for some tubes in the right dimension, not finding what I wanted... This seems like an interesting option. Except the actual...
  8. Hephaestus

    Aviation funnies

    Clearly I've been aviating wrong 😂
  9. Hephaestus

    GA "AQP" movement

    Docs here: https://www.aviation101.com/aqpgrassroots Video gets you started down that series here: Youtube doing random things got me onto blancorilio (Juan brown) / Dan ryder talking AQP in GA. I really don't like the AQP term, but I really do see the content as probably something GA needs...
  10. Hephaestus

    Equatorial snowbird aviation life

    So, as it hits -30c again... thoughts turn to warmer climates again... 😂 Curious if some of you better traveled types have some thoughts on a more equatorial winter escape? Lower day to day cost of living, not super restrictive aviation rules... Beach access... being able to buy at an Airpark...
  11. Hephaestus

    RIP Chuck Yeager

    https://www.12newsnow.com/article/news/nation-world/chuck-yeager-obit/507-3ea329c3-68b8-481b-9017-41f9db373e56 For those like me hiding from the news... This one's noteworthy. RIP Mr Yeager
  12. Hephaestus

    99lb/45kg primary glider

    Hangar beers discussion last night that got me curious. What we were discussing is an option to get back to "old school" glider training. Students spend a bunch of time waiting around between flights, most of the time getting "busy work". While primary gliders operating as hang gliders don't...
  13. Hephaestus

    That's how you ship a plane!

    Brand new ask-21 arrived in my neck of the woods. Gotta love Germans who know how to ship things across the world! Sorry it's not a 20' seacan :popcorn: about twice that.
  14. Hephaestus

    14dof (2x 7dof) foam cutter

    There's a new idea or two for you guys to mull over.
  15. Hephaestus

    8months later... Medical resolved. Wx sucks.

    I have paper! I can go fly again! 20g30 at 70° to runway... Guess we wait some more... Why are the gods so cruel?
  16. Hephaestus

    Lazy bee derived LAR design

    Well maybe its time to move it out of the daydreamers thread as I continue to play with it. Based on the Clancy Lazy Bee - an 'older' RC design of the 70's that was made to look a lot like the old-timers. I know some of us RC geeks always keep one handy as they're a ton of fun. Low rates -...
  17. Hephaestus

    EASA urgent AD rotax 912/915

    https://www.casa.gov.au/airworthiness-directives/ad-folder-name?field_ad_folder_name_tid=ROTAX Manufacturer(s): BRP-Rotax GmbH & Co KG, formerly BRP-Powertrain GmbH & Co. KG, Bombardier-Rotax GmbH & Co. KG, Bombardier-Rotax GmbH Applicability: Rotax 912 iSc2 Sport, 912 iSc3 Sport and Rotax 915...
  18. Hephaestus

    Offshore composites

    Mentioned in another thread... Figure I'll ask opinions. If you search a certain website - that sells everything known to man produced in a certain offshore economy that everyone loves to hate. You'll find some amazing prices on raw composite materials. I ordered some composite honeycomb...
  19. Hephaestus

    I think I found my next paint/wrap

    Clickbait of course but I'm not rehosting all those pics. Yes I'm lazy. https://aviationhumor.net/kulula-a-south-african-airline-with-a-sense-of-humor/ And I've always liked that firetruck green color.
  20. Hephaestus

    Book recommendations? Structural design?

    So, after a summer of sitting around with Raymers aircraft design, and largely verifying what others had worked out by trial and error (at its heart it is a known and proven conventional design) I have a design on paper and mostly in CAD I'd like to start turning into a buildable aircraft...
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