For Mt quantities you'd need of order 100m fires per year, unless the guns were huge. But shells can be reused.
As I explained, gun launched jets likely aren't optimal. A linear motor or coil gun would be better. On Sun, 5 Nov 2023, 18:54 , <robertgch...@gmail.com> wrote: > Can someone do the following calculations? How many shells? How much > material would they consume each year? What happens to the shell casings > once they've delivered their load? What environmental impact would these > discarded shell casings have and in particular would they contain any > environmentally undesirable materials? What would be necessary for this to > receive social licence? > Regards > > Robert > > > On 05/11/2023 18:22, Andrew Lockley wrote: > > I've already looked at this. The meteor missile (modern) and blood hound > (cold war) use ram rockets. Nammo make ram artillery, and there's Chinese > manufacturers, too. It's not inexpensive to start these ramjets, > considering rockets or barrel wear. Coil guns might be viable. There's > manufacturers eg velontra.com making small hypersonic jets, which don't > require a hard start. > > Ballistic flight makes recovery difficult. > > On Sun, 5 Nov 2023, 18:15 Gilles de Brouwer, <gdebrou...@gmail.com> wrote: > >> A low cost SAI option? >> >> Regarding the trillions or billions to do SAI geoengineering, consider >> this option: >> >> Watch "How ramjets may change the role of artillery on the battlefield" >> on YouTube >> https://youtu.be/0vIPNElDkns?si=9Z_mUQUXBm-4dBxF >> At 4:21 you can see the 150km range parabolic trajectory goes as high as >> 105km altitude! >> >> Maybe Iowa battleship 16 inch guns with this ramjet tech could send stuff >> to orbit. >> Or could this be a low cost SAI geoengineering option? >> 1. How much would it cost to refurbish and send these old battleships to >> the Arctic and Antarctic waters and deliver to much higher altitudes? The >> armor plating would make the battleships iceberg damage resistant. >> 2. How much longer would the particles stay at useful altitudes? >> 3. Would they stay in place much longer with little wind at these very >> high altitudes? >> 4. Would it be more effective than aircraft delivered SAI? >> >> Note from the Iowa Class Wikipedia page: "...all four are museum ships >> part of non-profit maritime museums across the US." >> >> Gilles >> >> On Sat, Nov 4, 2023, 5:16 PM Jim Baird <jim.ba...@gwmitigation.com> >> wrote: >> >>> From the Physics and Economics of Thermodynamics Geoengineering, >>> reference 77 of the Healthy Climate Action Coalition Petition to World >>> Leaders: The Case for Urgent Direct Climate Cooling, The cost of removing >>> 1139 Gt of CO2 with this technology (Negative Emissions CO2 OTEC) would >>> therefore be $175 trillion. CDR technology for creating synthetic fuel from >>> atmospheric CO2 or for other purposes currently costs about $600 per ton, >>> with a goal of reducing this to below $100. [48] So, a goal of returning >>> atmospheric CO2 levels to preindustrial from a 2054 level of 1577 Gt is >>> likely to cost at a minimum $114 trillion. >>> >>> >>> >>> *From:* healthy-planet-action-coalit...@googlegroups.com *On Behalf Of >>> *Gilles >>> de Brouwer >>> *Sent:* November 4, 2023 4:21 PM >>> *To:* H simmens <hsimm...@gmail.com> >>> *Cc:* healthy-planet-action-coalition < >>> healthy-planet-action-coalit...@googlegroups.com>; via NOAC Meetings < >>> noac-meeti...@googlegroups.com>; Planetary Restoration < >>> planetary-restorat...@googlegroups.com>; geoengineering < >>> geoengineering@googlegroups.com> >>> *Subject:* Re: Hansen Vs. Mann - Is Global Warming Linear Or >>> Exponential? - CleanTechnica >>> >>> >>> >>> My comment left on the article: >>> >>> Steve I like your writing, but "Trillions" is obviously wrong. Billions >>> is more realistic even with expensive new high altitude aircraft, but maybe >>> much less expensive with a small fleet of specialty airships. >>> >>> All the SAI geoengineering risks are scare mongering without data to >>> back it up and such dogma unscientific opinions from "scientists" are >>> damaging to science as an institution. AI, for example genetic algorithms >>> or better could design an SAI strategy that minimizes the negatives, as >>> it's an optimization problem with infinite variables which is why progress >>> is so slow. Coupling computational models with small scale real atmosphere >>> experiments with full public data access for review is critical to make a >>> smart decision to potentially avoid billions starving, cooking, and/or >>> dying of thirst, or migrating. >>> >>> Thanks, >>> Gilles de Brouwer >>> >>> >>> >>> >>> >>> On Sat, Nov 4, 2023 at 3:10 PM H simmens <hsimm...@gmail.com> wrote: >>> >>> >>> >>> This article provides the author an opportunity to declare war on Geo >>> engineering by for example claiming that scientists estimate that >>> Geoengineering will cost “on the order of tens of trillions of dollars”. >>> >>> >>> >>> Nice to know that we can count on the media to be fair and balanced. >>> >>> >>> >>> Herb >>> >>> >>> >>> https://cleantechnica.com/2023/11/03/hansen-vs-mann-is-global-warming-linear-or-exponential/ >>> >>> >>> >>> Herb Simmens >>> Author of *A Climate Vocabulary of the Future* >>> >>> “A SciencePoem and an Inspiration.” Kim Stanley Robinson >>> @herbsimmens >>> HerbSimmens.com >>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Healthy Planet Action Coalition (HPAC)" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to healthy-planet-action-coalition+unsubscr...@googlegroups.com >>> . >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/healthy-planet-action-coalition/3D131483-011F-4A9A-9B2D-3BA99C9A9F05%40gmail.com >>> <https://groups.google.com/d/msgid/healthy-planet-action-coalition/3D131483-011F-4A9A-9B2D-3BA99C9A9F05%40gmail.com?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Healthy Planet Action Coalition (HPAC)" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to healthy-planet-action-coalition+unsubscr...@googlegroups.com >>> . >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/healthy-planet-action-coalition/CAGQ2tEqsU%3Drm7ZJpo4p67O9p-HHL0f_%3Dq9Xd2Q5nj6bLUFvkqw%40mail.gmail.com >>> <https://groups.google.com/d/msgid/healthy-planet-action-coalition/CAGQ2tEqsU%3Drm7ZJpo4p67O9p-HHL0f_%3Dq9Xd2Q5nj6bLUFvkqw%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "geoengineering" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to geoengineering+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/geoengineering/CAGQ2tEq6GP68_404MZonwgf4NZFypGLHeTzcvK0V%3DNPoZEMEWQ%40mail.gmail.com >> <https://groups.google.com/d/msgid/geoengineering/CAGQ2tEq6GP68_404MZonwgf4NZFypGLHeTzcvK0V%3DNPoZEMEWQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to the Google Groups > "NOAC Meetings" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to noac-meetings+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/noac-meetings/CAJ3C-05sBDn1Bf5JgCiKxHeXLfaWjVQRP7T-VZK_zKTGDgnf8Q%40mail.gmail.com > <https://groups.google.com/d/msgid/noac-meetings/CAJ3C-05sBDn1Bf5JgCiKxHeXLfaWjVQRP7T-VZK_zKTGDgnf8Q%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > -- > You received this message because you are subscribed to the Google Groups > "NOAC Meetings" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to noac-meetings+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/noac-meetings/2b46ef3a-c096-4ef5-acc2-7e3c33ea21ae%40gmail.com > <https://groups.google.com/d/msgid/noac-meetings/2b46ef3a-c096-4ef5-acc2-7e3c33ea21ae%40gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. 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