Speedboat100's Recent Activity

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  1. Speedboat100 replied to the thread Build your own HO229 WW2 German Jet Fighter!!.

    Are you seriously asking that ? Planes are instable to start with. At 11:30: [MEDIA]

    Jul 17, 2019 at 3:14 PM
  2. Speedboat100 replied to the thread Fauceted Wind Turbine, Reynolds number advice please.

    Polish company is 30 years old. It seems to me that their turbine stalls very early and actually cannot utilize the 70% efficiency for...

    Jul 16, 2019 at 9:59 PM
  3. Speedboat100 attached a file to the thread Build your own HO229 WW2 German Jet Fighter!!.

    Yes but engine out situation etc demand more stability. Albion is an interesting caracter. Gliders are a different kinda system...

    A19602083000cp07.JPG Jul 16, 2019 at 7:16 PM
  4. Speedboat100 replied to the thread Fauceted Wind Turbine, Reynolds number advice please.

    I think the H-Rotor ( cycloturbine/H-Darreius ) is not ready yet...I mean the design is still not 100% perfect. That is why so many...

    Jul 16, 2019 at 7:00 PM
  5. Speedboat100 replied to the thread Fauceted Wind Turbine, Reynolds number advice please.

    Yes their system was heavily flawed, but their conclusions are very interesting. Also the solidity was very low...you can see the...

    Jul 16, 2019 at 6:54 PM
  6. Speedboat100 replied to the thread Fauceted Wind Turbine, Reynolds number advice please.

    Best source on this kinda turbine is the NREL data of the MCDonnell Aircraft Giromill tests in 1974-1978...during the oil crisis.

    Jul 16, 2019 at 11:11 AM
  7. Speedboat100 replied to the thread Fauceted Wind Turbine, Reynolds number advice please.

    You are on the right track...only ANEW company in Poland claims 70% efficiency for the simple H-Darreus type...and they may be even correct.

    Jul 16, 2019 at 11:09 AM
  8. Speedboat100 replied to the thread Fauceted Wind Turbine, Reynolds number advice please.

    Errr...you might be surprised but at least 4 universities have counted that 59,3 % is only valid on HAWT propellers..VAWTs can exceed...

    Jul 16, 2019 at 11:06 AM
  9. Speedboat100 replied to the thread Build your own HO229 WW2 German Jet Fighter!!.

    I always wondered why Jack Northrop and Horten Brothers wanted to get rid of the rudders altogether ?

    Jul 15, 2019 at 10:21 PM
  10. Speedboat100 replied to the thread First attempt at design for electric delta pusher.

    NEGATIVE ? Isn't any attention a good attention ? You get the thrust line lower if you have more motors closer to the trailing edge.

    Jul 15, 2019 at 8:23 AM
  11. Speedboat100 attached a file to the thread How does it fly?.

    This is good for all to read.

    riblett ga37a315info.jpg Jul 14, 2019 at 7:45 PM
  12. Speedboat100 attached a file to the thread How does it fly?.

    That is a neat foil as well.

    riblett ga37a315.jpg Jul 14, 2019 at 7:39 PM
  13. Speedboat100 replied to the thread First attempt at design for electric delta pusher.

    How about having at least 4 x 5 KW engines and smaller dia props in the tail ?

    Jul 14, 2019 at 7:20 PM
  14. Speedboat100 attached a file to the thread The big video topic.

    Everything didn't go as planned in the beginning of aviation.

    PM1928_FLYING_CAR_boat.jpg Jul 14, 2019 at 3:52 PM
  15. Speedboat100 replied to the thread World's Largest Aircraft (Stratolaunch) Flies for the First Time.

    This could be used as a hypersonic plane launcher.

    Jul 14, 2019 at 10:43 AM
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