When did Starship switch from having the methane header tank close to the main tank to having it in the nosecone?I have looked around the threads, but I didn't find anything with a search.I know SN15 had the "before" design, and S24 has the current design with both header tanks in the nosecone. What about S20?I hope someone can illuminate me.
Quote from: Alberto-Girardi on 05/28/2023 05:01 pmWhen did Starship switch from having the methane header tank close to the main tank to having it in the nosecone?I have looked around the threads, but I didn't find anything with a search.I know SN15 had the "before" design, and S24 has the current design with both header tanks in the nosecone. What about S20?I hope someone can illuminate me.I am quite certain, that the header tank (which came with ship 5) was in the nose cone right from the beginning. As someone above already stated it was needed to balance out the ship during the bellyflop, which was one of the test subjects in the first 10km hop.
Oxygen header tank was in the nose cone right from the beginning. Methane header tank was moved to the nose cone only recently. I don't know the time of decision.
Are there any indications where the header tanks will be for the crewed version of the Starship? All the images I have seen show the crew compartment without any down-comer in the nose cone.
Up to 12 passengers, with private quarters...Nosecone area available for entertainment, manufacturing, and scientific opportunities
Would it not make some degree of sense to engineer the top end of Starship like a Dragon 2 on steroids sans the heatshield element?standard disclaimer - if this has been discussed previously here or elsewhere, apologies...
Quote from: winkhomewinkhome on 05/29/2023 04:47 pmWould it not make some degree of sense to engineer the top end of Starship like a Dragon 2 on steroids sans the heatshield element?standard disclaimer - if this has been discussed previously here or elsewhere, apologies...Yes please not here.See the ever active aborts threadhttps://forum.nasaspaceflight.com/index.php?topic=56632.0
Quote from: InterestedEngineer on 05/30/2023 12:48 amQuote from: winkhomewinkhome on 05/29/2023 04:47 pmWould it not make some degree of sense to engineer the top end of Starship like a Dragon 2 on steroids sans the heatshield element?standard disclaimer - if this has been discussed previously here or elsewhere, apologies...Yes please not here.See the ever active aborts threadhttps://forum.nasaspaceflight.com/index.php?topic=56632.0LOL - I really must be losing it in my advancing years > I have reread my question multiple times now and neither did I mention the intent/need/option to abort, nor did I infer an inflight abort option...I guess I was revisiting, if my feeble memory recalls correctly, the "Swiss Army" Starship, where the ship was built with a utilitarian propulsive section. and the upper portion could be any assortment of purpose built units. potentially a Dragon-like on steroids unit.hopefully that brings some clarity vs my attempted initial brevity.
I'm curious what the actual temperature of the surface on the inside of the nozzle actually is during operation? On one side it's very cold, the other very hot. Which wins out? I suspect that the surface is actually fairly cool but that's really a WAG. Does anyone around here have any actual knowledge on that?
I'm curious what the actual temperature of the surface on the inside of the nozzle actually is during operation?
SpaceX is likely using something like GRCop-84 for the main combustion chamber.https://ntrs.nasa.gov/citations/20050123582John
Quote from: livingjw on 05/31/2023 12:25 amSpaceX is likely using something like GRCop-84 for the main combustion chamber.https://ntrs.nasa.gov/citations/20050123582JohnWould a copper alloy be strong enough to support the combustion chamber pressure directly or is it used as a liner with steel or some other stronger outer jacket?
Quote from: Tangilinear Interjar on 05/30/2023 04:54 pmI'm curious what the actual temperature of the surface on the inside of the nozzle actually is during operation? On one side it's very cold, the other very hot. Which wins out? I suspect that the surface is actually fairly cool but that's really a WAG. Does anyone around here have any actual knowledge on that?I believe the nozzle is conductive with something like copper since you want to conduct the heat to the coolant (LCH4) that's a short distance away.Which means they don't get very hot.
Quote from: Okie_Steve on 05/31/2023 03:33 pmQuote from: livingjw on 05/31/2023 12:25 amSpaceX is likely using something like GRCop-84 for the main combustion chamber.https://ntrs.nasa.gov/citations/20050123582JohnWould a copper alloy be strong enough to support the combustion chamber pressure directly or is it used as a liner with steel or some other stronger outer jacket?Copper can be used by itself but likely they’re using a jacket made of some other metal.