From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm1-x330.google.com (mail-wm1-x330.google.com [IPv6:2a00:1450:4864:20::330]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id ACDF13CB38 for ; Wed, 26 Apr 2023 17:11:04 -0400 (EDT) Received: by mail-wm1-x330.google.com with SMTP id 5b1f17b1804b1-3f1958d3a53so61537945e9.0 for ; Wed, 26 Apr 2023 14:11:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1682543463; x=1685135463; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=5dbvJX4GwrmpSVmrzNfAQy1OZZ2mimDQs8hOusrFQaU=; b=QanWQJYdRzbh6N94SLiPbljsBiTWJvJ46B6EdFzwbSPAyhZSaINUFmJfZmrly5CfiZ zk9qmRQl4ttwK6KF/Rmk/RCFLpcaJ6JzYvAAtaoCfrLjYBabXUakwuvLb7IXmJJPsrVQ Oxue7zr9jOEKN34kDb+3lHrULO2HuKAILiGwL/ec7qHRo8nx5AVOULKBiPPCL6QK8ftu gb9HHfhx2c/xXXihb1mYqKZLujQt49HIwjXnFNYhZd26/LMZEcvNecbPHfohXq46jfiE aXAep/0Xv8symrq77cHufKTNVUBY22TFlwrFa/ikj9hBSOs11U5yU/ApoEDGeXlGYoOc Za3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682543463; x=1685135463; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5dbvJX4GwrmpSVmrzNfAQy1OZZ2mimDQs8hOusrFQaU=; b=K6LT0NEEO2WAE+uUf9ETW7/WLi2bxoGt62EKIoeDxmP5f9I2YcGSgI5R+ZxhPk4+l0 dwcvUp6GtD7LlSUqCUv29N4eINHlz8FY6cVieC2qq7lzasbz00mILUwvaweSVw2KhxON zpwwfRETGUaBkDHF22dlH6QTFCOytxY9rHTIBXArZtD3OKwsg3avbZYVkANr6VgjJpy6 lVkc4bmDHVhFmQONXl4aeQLeH376Nkf9sEeCR2hN5Sd4ykqHh5Au9OpcO74NNMT72ahs hhqrp9ywXPB1c+VaC4Bn5InoUwlU3hIld3m1B0zsOOpU7+86euiBuIHVfBhjPubdRVz6 93dA== X-Gm-Message-State: AAQBX9ceyrWTeJ6kTz7i26r8urhvhXWk0R5MLL3Z4l9IkzZ2Q329+acd HEDcfumpkBxwwmdKVD4DRljHtswQ1DZpm1R/TD2pv0t0 X-Google-Smtp-Source: AKy350bacfl2yDrMWqpwcZ4V0eD0SrimXVOjseDTFGBvVwK/GiP+uNo/l752zAK1Vq5LHG4pLTY31HKc4crdnhHJyYs= X-Received: by 2002:a7b:cb47:0:b0:3f0:967e:2cfb with SMTP id v7-20020a7bcb47000000b003f0967e2cfbmr14702156wmj.36.1682543463153; Wed, 26 Apr 2023 14:11:03 -0700 (PDT) MIME-Version: 1.0 References: <202304262041.33QKfOVh096953@gndrsh.dnsmgr.net> In-Reply-To: <202304262041.33QKfOVh096953@gndrsh.dnsmgr.net> From: Dave Taht Date: Wed, 26 Apr 2023 14:10:51 -0700 Message-ID: To: "Rodney W. Grimes" Cc: Dave Taht via Starlink Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Starlink] some post Starship launch thoughts X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Apr 2023 21:11:04 -0000 On Wed, Apr 26, 2023 at 1:41=E2=80=AFPM Rodney W. Grimes wrote: > > > As always I enjoy the flood of information we get on this list! > > > > still, so far, my research on a nitrogen deluge system (instead of > > water) has come up empty for me, except as a fire suppressant. So it?s > > either crazy or brilliant. Or both! I really liked the idea of > > something cooler that was a natural byproduct of the LOX process... > > I dont think cooler does much, isnt it the "energy of vaporization" > that is actually doing all the "work" in this type of system? > > H2O is 40.7 kJ/mol and LN2 is 5.6 kJ/mol so you would > need ~7 times as much LN2 to do the same work. Now that! was the kind of numbers I was looking for! Still, water has to come from somewhere, and be stored. I will keep thinking about it. I like that they seem to think that a water cooled steel plate will suffice. > And the reason N2 is used as a fire suppressant is again not > because of temperature, but because it displaces the O2 and > suffocates the fire. N2 is also easier on our ozone layer > than the prior used Halon. Finally, this is usually > compressed N2 gas, not LN2. > > -- > Rod Grimes rgrimes@freebs= d.org -- AMA March 31: https://www.broadband.io/c/broadband-grant-events/dave-taht Dave T=C3=A4ht CEO, TekLibre, LLC