Steam Required for a Catapult Launch?
Hi, As part of an modern Aircraft Carrier Design spreadsheet that I have been working on (which I have mentioned in a couple threads on these boards) I have been trying to determine the amount of...
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Hi,Sorry for the delay in getting this done, but I was having some problems making a PDF. So, for now here is a scan of the article in a WORD format.RegardsPathttp://www.mnvdet.com/CV/COGAS3.docx
View ArticleRe: Steam Required for a Catapult Launch?
That article is great... it solves most of the questions regarding the likely size and efficiency of naval waste heat generators. 1) Efficiency of the Steam GeneratorGT exhaust temp: 977 FAir temp...
View ArticleRe: Steam Required for a Catapult Launch?
HK: What are you using the output from the GT for? My assumption is you are to meet: a) propulsion b) hotel loads - I'm leaning to electric drive... With remaining propulsion coming from Diesels? So,...
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Don, good question. Given the fairly large GT output that will be needed to generate steam, you may not want diesels at all so as not to have a ton of excess GT power. Also the GTs will be almost as...
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HK: Turbines are only efficient between ⅔rds and full load; I'm not sure cruise requires even 1 of your pair of LM2500 G4s to be operating at ⅔rds to meet propulsion load (assuming hotel load is met...
View ArticleRe: Steam Required for a Catapult Launch?
HK wrote:That article is great... it solves most of the questions regarding the likely size and efficiency of naval waste heat generators. 1) Efficiency of the Steam GeneratorGT exhaust temp: 977 FAir...
View ArticleRe: Steam Required for a Catapult Launch?
don4331 wrote: Turbines are only efficient between ⅔rds and full load; I'm not sure cruise requires even 1 of your pair of LM2500 G4s to be operating at ⅔rds to meet propulsion load (assuming hotel...
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don4331 wrote: And when launching a strike, you will be using 100% of steam for the strikes; so turbo generator isn't available when hotel loads are probably also at their peak. I believe I am leaning...
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How about COSAD-IEP? COSAD has been done before (but not on carriers). Turbo-Electric has been done before (including on Lex and Sara, CV-2 and -3). And CODAG-IEP is being done on the QE class, so IEP...
View ArticleRe: Steam Required for a Catapult Launch?
HK: While your calculation of the Steam Generator’s efficiency is correct; the efficiency isn’t used in the steam calculations: LM2500 (early generation) GT output: 463,000 lb/hr @ 977 F Stack exhaust...
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Here are a few data points for hotel loads:Cavour's maximum hotel load is ~6.5MW (generating capacity of 17.6MW with 270% margin)....
View ArticleRe: Steam Required for a Catapult Launch?
Note the increase in power cylinder diameter for the C-13-2 (21"), which compensates for the lower operating pressure compared to the C-13-1 and C-13-3 (18" both). You need much more steam to fill the...
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Bager: Could the upper limit for the C-13-2 be for launching F-14 Tomcat's - 74k lb max weights? While the C-13-1/3 lower numbers be for the F-18 Super Hornet/E-2 Hawkeyes (66k/57k lbs respectively);...
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The C-13-3 is just a -2 cut down for Charles de Gaulle; the limitation is a function of the shorter stroke length. The USN happily launched F-14s from -1s on the earlier Nimitzes, and even the C-11s...
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IcelofAngeln wrote:The C-13-3 is just a -2 cut down for Charles de Gaulle; the limitation is a function of the shorter stroke length. The USN happily launched F-14s from -1s on the earlier Nimitzes,...
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Essex class used a different cat strategy than a Nuke. They align a certain number of boilers to the cats and keep it that way. Usage is about 150 or so gallons.
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How are you going to get super-heated 855deg/1,000+ lb. steam out of an LM-2500? The waste heat boilers on the CGs and DDs could just make enough steam for 100lb. hotel loads. Not to mention that they...
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I'm wondering if it's feasible to have a steam catapult installed on a flight deck on a modern freighter or tanker converted as a CVE.
View ArticleRe: Steam Required for a Catapult Launch?
Condottiere wrote:I'm wondering if it's feasible to have a steam catapult installed on a flight deck on a modern freighter or tanker converted as a CVE.Wouldn't you really do everything you need from...
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