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paulg's profile
Paul Graham
Paul Graham
Paul Graham
Verified account
@paulg

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Paul GrahamVerified account

@paulg

paulgraham.com
Joined August 2010

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    Paul Graham‏Verified account @paulg 19 Nov 2016

    Boom's supersonic airliner is going to be 30% more efficient than the Concorde: https://www.youtube.com/watch?v=nJkM-ykKRxg …

    11:12 AM - 19 Nov 2016
    • 48 Retweets
    • 100 Likes
    • Milo Spirig Emmanuel T Odeke jadamr Andrew Gertig Александр Дасаев Alex Shirazi James Malone Praful Thachery JIMMY LIU
    6 replies 48 retweets 100 likes
      1. New conversation
      2. Paul Graham‏Verified account @paulg 19 Nov 2016
        Replying to @paulg

        It's actually pretty impressive that with 1960s technology the Concorde's designers came within 30% of what's possible today.

        22 replies 29 retweets 181 likes
      3. Benedict Evans‏Verified account @benedictevans 19 Nov 2016
        Replying to @paulg

        fuel efficiency and sonic booms, though https://en.m.wikipedia.org/wiki/Oklahoma_City_sonic_boom_tests …

        2 replies 1 retweet 3 likes
      4. Andrew Miller‏ @amillermsme 19 Nov 2016
        Replying to @benedictevans @paulg

        both execution problems not intrinsic to speed. Grounding to remember that non digital problems can be decades long

        2 replies 0 retweets 0 likes
      5. Benedict Evans‏Verified account @benedictevans 19 Nov 2016
        Replying to @amillermsme @paulg

        are turbofans inherently more efficient that turbojets? Are smaller aircraft inherently less efficient?

        3 replies 0 retweets 0 likes
      6. Blake Scholl‏Verified account @bscholl 21 Nov 2016
        Replying to @benedictevans @amillermsme @paulg

        Bigger fans better at lower speed, less at higher speed. Mach 2.2 works with goldilocks fan

        1 reply 1 retweet 2 likes
      7. Blake Scholl‏Verified account @bscholl 21 Nov 2016
        Replying to @bscholl @benedictevans and

        variable/adaptive engines improve efficiency at wide range of speeds. But still 'in the lab', not MVP

        0 replies 0 retweets 3 likes
      8. End of conversation
      1. ATo‏ @Florent_ATo 20 Nov 2016
        Replying to @paulg @YouTube

        working in engineering and not using SI system for promotional (i.e. international) video in 2016 *facepalm*

        0 replies 0 retweets 0 likes
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      1. Willis F Jackson III‏ @wfjackson3 19 Nov 2016
        Replying to @paulg

        but will it be any quieter for the people it's flying above,

        0 replies 0 retweets 0 likes
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      1. (((EisarLipkovitz)))‏ @lipko 19 Nov 2016
        Replying to @paulg

        super cool, thanks for sharing. I think the demand side for this product is also much improved.

        0 replies 0 retweets 0 likes
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      1. Steven Irby‏ @StevenIrby 19 Nov 2016
        Replying to @paulg

        I hope they can make it happen, but to be honest I have more faith in these guys making it happen:http://www.aerionsupersonic.com/ 

        0 replies 0 retweets 0 likes
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      1. Simon Brooke  🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺‏ @simon_brooke 19 Nov 2016
        Replying to @paulg

        For any sakes, fifty years later you'd hope so! How many % has your computer improved in efficiency in that time?

        0 replies 0 retweets 0 likes
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