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  1. Fireflyer228

    Is there such a thing as a dual counter rotating prop gyrocopter, Kamen style, or otherwise?

    It turns out that counter rotating props are extremely efficient. Worth the complexity enough that Howard Hughes tried it in the 40s (and almost lost his life-probably due to the complexity you mentioned). That said it’s making a new comeback with better technology.
  2. Fireflyer228

    Ebay Today

    I’ve been thinking about this with aircraft I see falling into disrepair. I’ve been thinking they key might be in a bribe. “I’ll get this a/c flying again and we’ll go get a hamburger”. Maybe that could be the key for someone not wanting to sell. Kenneth
  3. Fireflyer228

    Acceptable Fiberglass Suppliers for Aircraft Construction

    A presenter at an EAA composite workshop today kept mentioning Rock West (www.rockwestcomposites.com) No affiliation, but I’m also looking to buy some mold making materials, strand mat fiberglass, carbon fiber fabric and epoxy for resin infusion. Thanks for the great info and links in this...
  4. Fireflyer228

    Variable pitch prop design for electric

    Beautiful electric variable pitch prop
  5. Fireflyer228

    Not so simple retractable gear

    Hey all, I didn't want to hijack the Simple Retract thread. Are any of you familiar with the Infinity main retract gear kits sold for canards? http://infinityaerospace.com/product/featured/landing-gear/ The Infinity system is a hydaulic system with 3 ways to get the gear down. Any...
  6. Fireflyer228

    51% rule?

    Thanks all who have already replied. This is exactly what I wanted to understand. It seems like one FAA document leads to another then another then another I hadn't found the homebuilt 'Repairman Certificate' window had closes. I'm not trying to short cut the rules, just as I tried to explain...
  7. Fireflyer228

    51% rule?

    I have heard the Airworthiness Certificate referred to as the 'white ticket'. Added note. Airworthiness Cert is white for Certified aircraft, I just noticed my E-AB Special Airworthiness Certificate is pink. Is this normal?
  8. Fireflyer228

    51% rule?

    Ron, Great post and also the comments of others. I snipped out the E-AB portions. "Only one repariman certificate is issued to an E-AB aircraft"? Even if another builder and has rebuilt more than the previous owner and documented it? I thought the original builder would still be on the...
  9. Fireflyer228

    Ebay Today

    The Bede4 listed on Ebay in Idaho is a great little aircraft, but $12k for an unfinished project for that aircraft seems like a lot.
  10. Fireflyer228

    Why battery-powered aircraft will never have significant range

    Roughly a factor of 4 and you'd be at the original Cri-Cri (9hp a side-twin engine) for one full size person. With currently flying electric examples. https://deankmiller.com/cri-cri-aircraft-for-sale/
  11. Fireflyer228

    Introducing AeroAcademy - Online Courses about Aerodynamics and Flight Dynamics

    Doug, I'm enrolled. Thank you for sharing this. Good stuff!
  12. Fireflyer228

    Trace based simplified composite analysis. Opinions?

    My last post on this thread. On my phone it looked like it was recent and on this website I can't edit my posts after a few minutes. It makes me a little crazy when I re-read my posts and it looks like a child wrote it. Sorry for my random post. I didn't mean to detract from the topic. I...
  13. Fireflyer228

    Trace based simplified composite analysis. Opinions?

    *their data* sorry for the typos
  14. Fireflyer228

    Why battery-powered aircraft will never have significant range

    Rolls-Royce in the all electric game https://www.ainonline.com/aviation-news/air-transport/2020-10-27/rolls-royce-and-tecnam-develop-electric-commuter-airliner
  15. Fireflyer228

    What did you do on your airplane project today?

    I would love to see that database & spreadsheet, if she ever wants to share. Actually, all can be done in a database and queried any myriad of ways depending on how she built the tables. and can be so much easier to enter data. Even knowing what the Raptor project is... She’s a keeper!
  16. Fireflyer228

    Experimental Ducted Fan Aircraft Designs

    Yep, meant not a ducted fan. Referring to the Fully Charged episode that I linked in my post. Electric aircraft counter rotating, not ducted. Taking "Not DF" out like that takes it out of context.
  17. Fireflyer228

    Experimental Ducted Fan Aircraft Designs

    Not DF but electric aircraft with counter rotating props. This was a few years ago, so I wonder where this project is now. High power sport racer is how they describe it.
  18. Fireflyer228

    Craigslist

    I sent a PM. I'm curious.
  19. Fireflyer228

    Craigslist

    Thanks Bille, The Boulder VariEZE fell through. The guy wouldn’t get back to me with photos. Although that’s a nice looking LongEZ I can’t swing the purchase a finished bird. I’m going to have to die from 1000 cuts instead of one big cut purchasing a finished aircraft. I did purchase som Cozy...
  20. Fireflyer228

    Ebay Today

    The other Velocity SE project for sale https://www.globalair.com/aircraft-for-sale/Velocity
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