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  1. berridos

    New skin material

    https://techxplore.com/news/2022-02-aeroshark-thin-airplanes.html?fbclid=IwAR2WfL2-wADAsLTqzrvsriMR4MD5rC12tMC0awzMGl6aC5qqoVjrPMCH-Wo
  2. berridos

    Interesting generator

    https://www.aquariusengines.com/technology/
  3. berridos

    flutter-suppression technologies

    https://www.nasa.gov/centers/armstrong/news/FactSheets/FS-105.html Wonder how that system works. Overriding servos that move the ailerons against the wing oscilations?
  4. berridos

    qudacopter ice

  5. berridos

    Hydrogen storage

    http://sustainableskies.org/hydrogen-powerpaste-goop/?fbclid=IwAR0PhHcl_B8WAd0SdWFDowjKyRX0N3ykBVXdCjg5cDIwC3rAtDK0PNJPBMA
  6. berridos

    Liquidpiston not dead

    https://www.startengine.com/liquidpiston?fbclid=IwAR0zqq3E0QYiES3PmbQA6_6sSgkpjGkNjkg6bnk6WJtMBvNEdQtQd4PUhzY&utm_campaign=23846740117750039&utm_medium=liquidpistonrga&utm_source=paid%20social
  7. berridos

    Merlin quarter scale

  8. berridos

    Interesting device to change torque and rpm on motors

    https://www.facebook.com/watch/?ref=saved&v=307180163171145 Maybe useful integrated into a variable prop pitch setup?
  9. berridos

    D-Motor Supercharged Version

    https://www.d-motor.eu/blog/d-motor-blog-1/post/the-d-motor-family-expands-150-hp-29?utm_source=Season+Greetings&utm_medium=Email This engine is becoming sexier day by day, hope they survive until my project is ready. They need to add turbo to the LF26 too
  10. berridos

    Nice rotary

    http://www.rotronuav.com/engines/rt-600xe?fbclid=IwAR3RtT7vEOL8Tfi2hBMRShlEU6H_2bPExhdAA-DalxO9vYOEjUFmVsugT64 If they are unreliable maybe mount two of them) Seriously, could they be mounted side by side with a common gearbox that would allow for one of them to fail ?
  11. berridos

    Hybrid

    https://www.droneassemble.com/product/hybrid-drone-generator-for-building-big-delivery-drone-solution-100kgs-take-off-weight/?fbclid=IwAR1mu2QdW6kfC7S3V5h-QQAWm8zIdacyoCJTGPN5qNI2iSkG3MA0wemx9wI For my single seater i would have enough cruise power with 28kw maybe. So thats double than the...
  12. berridos

    Like this UL concept

    Dead simple. Better with a belt driven by an ice. The fuselage should be out of a single sandwich composite plate.
  13. berridos

    turboprop At 31kW (42hp), the fuel consumption was just 15.2 lph.

    https://www.pilotweb.aero/features/making-the-light-aircraft-turbotrop-a-reality-1-6927054?fbclid=IwAR0PinxFuMlZotHPT7m40NWUNQQR0s-FDYehdYMjeViEuKrR97ddGBWtIRU https://www.turbotech-aero.com/solutions/#turboprop
  14. berridos

    This flying car flies fine

  15. berridos

    Russian Sigma 7

    Like a lot this design. Never saw a design that could be trailered right off. https://avianikproject.ru/en/sigma-7/?fbclid=IwAR2g270CxecOxQSTeU3oXwMdDoGfHa5iSB3MmjswduUllz-DQjCPIH9zsHo
  16. berridos

    yamaha Phazer 80hp with rotax c box

    Excellent power to weight and reliability. Really convincing engine https://www.facebook.com/groups/1251356951570824/permalink/2261793910527118/
  17. berridos

    XLFR5 Reverse Engeneering Verhees Delta

    Hi everybody I am having a hard time understanding the verhees delta in xflr5. Basic parameters of the original: CoG between 1270 and 1390 cm Cruise speed 220kmh = 62 ms Nowhere is stated the reflex used in cruise, but on the main plans, i measured on an uncommented picture, an up reflex of...
  18. berridos

    Suitable airfoil large thickness, high RE

    Hi everybody I am seraching for a simmetrical airfoil that has the particularity, that it is very thick (20%) and operates at high RE (7.000.000). May somebody could give me a hint on the design characteristics that makes an airfoil suitable for large thickness or high RE environment? As a...
  19. berridos

    Interesting Paper LAR-Stall-Vortex-Planform-Reynolds

    I am reviewing a paper that fits very well my current interests: Would somebody shed some light on the excerpt below and the concept of induced camber? Maybe an explanation that would be understandable for kids would be very appreciated.
  20. berridos

    Orions Cardboard composite structures

    hi everybody According to respected members in this forum the structure proposed by Orion has several benefits over sandwich-single spar structures. I often think about how such a structure can be produced and see several serious difficulties for cases that deviate from a non tapered straight...
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