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Thread: Supersonic with a propeller plane !

  1. #1
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    Lightbulb Supersonic with a propeller plane !

    I have been thinking. If you had very big surface area plane with 240 ft span and had Solar cells on it and batteries...and unlike a Solar Impulse you would be using both sun and batteries to propel the craft on at very high altitude you brake the sound barrier just like Alan Eustace did at 120 000 ft. I am pretty sure it is doable.

    What do you all think ?

  2. #2

    Default Re: Supersonic with a propeller plane !

    And what exactly would this airplane be flying through that had enough mass to keep it aloft and propel it to such speeds?

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    Default Re: Supersonic with a propeller plane !

    Quote Originally Posted by 1:1 Scale View Post
    And what exactly would this airplane be flying through that had enough mass to keep it aloft and propel it to such speeds?
    Exactly! Felix and Alan went supersonic straight down. BIG difference.

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    Default Re: Supersonic with a propeller plane !

    Quote Originally Posted by Race5 View Post
    Exactly! Felix and Alan went supersonic straight down. BIG difference.
    Check NASA Helios speed at different altitudes. You ought to know better than this as x-15 hurdled at above 300 000 ft.

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    Question Re: Supersonic with a propeller plane !

    Paul. MC Cready craft used 13 % efficient Solar panels on an aircraft that weighed just 2000 lbs. Now the newest film thin panels at Nasa have 33% efficiency. MIT just released they have doubled the litium battery capasity. You get my point ?

  6. #6

    Default Re: Supersonic with a propeller plane !

    Quote Originally Posted by Race5 View Post
    Exactly! Felix and Alan went supersonic straight down. BIG difference.
    Just fer giggles: what if Eustace wore a propeller-beanie on the way down?

  7. #7

    Default Re: Supersonic with a propeller plane !

    Quote Originally Posted by V1670 View Post
    Just fer giggles: what if Eustace wore a propeller-beanie on the way down?
    ...with a rope tried to his feet so he could pull the electric plane forward with the rope passing through a pulley anchored to the moon as he fell to Earth...

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    Cool Re: Supersonic with a propeller plane !

    Quote Originally Posted by 1:1 Scale View Post
    And what exactly would this airplane be flying through that had enough mass to keep it aloft and propel it to such speeds?
    It is gas called air; http://www.engineeringtoolbox.com/st...ere-d_604.html

    Above 60 km would be tricky if there was no chance to go beyond M1.

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    Default Re: Supersonic with a propeller plane !

    Quote Originally Posted by V1670 View Post
    Just fer giggles: what if Eustace wore a propeller-beanie on the way down?
    World's fastest gyrocopter.

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    Lightbulb Re: Supersonic with a propeller plane !

    If the propeller beanie was large and lite enuf Alan could land on the Moon too smoothly..kilometer long grafeine blades. NASA has studied several concept to fly an aeroplane like system in Mars atmosphere perfect doable as the gaseous substance there is equivalent to Earth atmosphere at 29 km. Mars has 1/3 gravity compared to Earth.

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