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  1. N

    Is it a bird? Is it a Plane? Is it a Helicopter? Nope - I'm building one of those new drone thingy's!

    There's a lot of times where a difference of opinion is just that, in this case, it's not. So, lets talk about a single electric motor. We'll even make sure it's a permanent magnet motor, so we don't have to worry about brushes. Things that can cause it to fail: Vibration causing a short in...
  2. N

    Flying wing as cheap and simple option for basic fun flying.

    Flat wrap aluminum covered wing with a slight taper? Endplate rudders, or rudder on the fuselage? High wing design with a fuselage built of flat sides with a fiberglass nose and a flat wrapped windshield? Shoot, conventional engine placement on the nose would simplify things even more, and...
  3. N

    Flying wing as cheap and simple option for basic fun flying.

    A thing that misses a lot of people.. like us.. is it needs to be pretty. The target audience shops mostly with their eyes. If it doesn't look neat/awesome/worthy of effort they're not gonna build the design. It's worth noting, that flying wings often have a fairly narrow performance...
  4. N

    Lack of twin engine E/ABs

    That plane is really, really pretty. Your product is really, really, impressive too. I believe I met you at oshkosh. I like what you're doing.
  5. N

    Lack of twin engine E/ABs

    Quite. Though... if you have enough small engines you could have a fully blown wing.... There was a project at oshkosh this year that had ten motors and a genset providing for a fully blown wing.
  6. N

    Lack of twin engine E/ABs

    For series built planes: Rutan Defiant Velocity V Twin Cri-Cri Lazair For one offs: Twin Engine Quickie 1 RV6a Built as a Twin Zenith Gemini Rutan Voyager To directly answer your question, you don't see a lot of twins for a whole slew of reasons. Most practical, is due to common design...
  7. N

    Is it a bird? Is it a Plane? Is it a Helicopter? Nope - I'm building one of those new drone thingy's!

    I haven't seen refrence to this previous work in this thread. But... You should probally take a look at this guys work. This is his all electric version. He's made them with gas engines too. "been done, proven to work."
  8. N

    Ducted fan aircraft

    Static. Question is how much thrust it's still making at flight speeds.
  9. N

    Human Powered Flight

    Kevlar.. is exactly that. That chain is 110 links? You'd need at least four of those to do something for a human powered plane. No. A metal chain isn't going to beat a kevlar. Are you under the impression that the car in that video is human powered?
  10. N

    Human Powered Flight

    There may well be... but I think that may be more about the availablity of the airplanes than the number of people who could do it. As noted, the entire peloton of the TdF could fly human powered planes quite well. Horsepower wise. About chain, not in comparison to kevlar thread there isn't...
  11. N

    Human Powered Flight

    Posts from people like you, are why i'm still here.
  12. N

    Human Powered Flight

    How did this become about "average human being" No, your general off the street person, even "a good and healthy example" is ever going to have enough power to do this. You need a elite athlete, or at least "exceptional example" to make this work. This was about winning prizes right? Your...
  13. N

    Human Powered Flight

    This week? France. The tour is there this week and next week IIRC. There's a solid 200 riders, most of which could get within 20% of those numbers. So I'm seeing lots of numbers here. And, depending on the circumstances, they're all vaguely right. Untrained people? you can figure...
  14. N

    Human Powered Flight

    https://www.cyclist.co.uk/in-depth/10269/cycling-hour-record#:~:text=Belgian%20Victor%20Campenaerts%20holds%20the,time%2Dtriallist%20in%20the%20saddle. So.. the hour record on a bicycle is 58km. Which is 34.9 miles. That.. kind of gives us a budget. That's roughly 650 watts. Given we need...
  15. N

    spec list of efficient light planes

    Also, the quickie.
  16. N

    Spaceship 2 amphibian

    So lets start with the videos: and "Spaceship 2 was designed and built from scratch in under two years by legendary Australian Aircraft Designer Steve Cohen. The aircraft is built entirely out of composite materials. It is powered by a Rotax 912, 100HP engine and it cruises at 85Kts @ 75%...
  17. N

    Simple pusher pseudo-jet

    That's a tradeoff, definitely. It also makes the plane less sensitive to trim changes (eg, movement of fuel, or people, in the plane) Becuase of the whole lever arm thing. This is where someone needs to make engineering decisions.
  18. N

    Simple pusher pseudo-jet

    I'm not sure that's a problem. I think you might just end up with a plane that rides "nice". If I am to pick up what you're putting down, are you referencing the problem with jets, and roll coupling?
  19. N

    Making a boom, before Boom Aerospace - Messing around with breaking mach.

    Understatement of the year. *giggles*
  20. N

    Making a boom, before Boom Aerospace - Messing around with breaking mach.

    That's not home buildable. Mission: To have the coolest thing in the sky. Though, how about some real numbers: 2 hour flight duration, sustained level flight above mach 1.1. Room for a pilot and a passenger. I understand, there's a practical knot limit below flight levels, so this will...
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