What is the white spray-pattern residue inside these Falcon Heavy nozzles?What are these 'Lego' plates inside the Atlas 5 fairing?Why are exhaust flames “jumping around” the bases of the Falcon-9 engine nozzles; NROL-76?Do they assemble the Falcon Heavy on the TEL?What are these yellow devices attached to the Falcon Heavy?What is this object on the Falcon Heavy payload stream?Why the soot pattern on the nosecone of Falcon Heavy side booster?What are these tiles inside the Falcon 9 fairing?Why are these Falcon 9 1st stage bodies (apparently) wrapped in black plastic for transport?What are these flames on the Falcon 9 booster?What are these big shiny metallic “lumps” on the bottom edge of each Falcon Heavy nozzle?
Is there a name of the flying bionic bird?
Landing in very high winds
New order #4: World
Is every set a filtered colimit of finite sets?
Information to fellow intern about hiring?
Why is my log file so massive? 22gb. I am running log backups
Could Giant Ground Sloths have been a good pack animal for the ancient Mayans?
What do you call something that goes against the spirit of the law, but is legal when interpreting the law to the letter?
aging parents with no investments
Is there a familial term for apples and pears?
Could a US political party gain complete control over the government by removing checks & balances?
How to make payment on the internet without leaving a money trail?
What do the Banks children have against barley water?
What is the meaning of "of trouble" in the following sentence?
What happens when a metallic dragon and a chromatic dragon mate?
Why was the "bread communication" in the arena of Catching Fire left out in the movie?
When blogging recipes, how can I support both readers who want the narrative/journey and ones who want the printer-friendly recipe?
How to deal with fear of taking dependencies
Copycat chess is back
Can I legally use front facing blue light in the UK?
Doomsday-clock for my fantasy planet
Filling an area between two curves
Pristine Bit Checking
Landlord wants to switch my lease to a "Land contract" to "get back at the city"
What is the white spray-pattern residue inside these Falcon Heavy nozzles?
What are these 'Lego' plates inside the Atlas 5 fairing?Why are exhaust flames “jumping around” the bases of the Falcon-9 engine nozzles; NROL-76?Do they assemble the Falcon Heavy on the TEL?What are these yellow devices attached to the Falcon Heavy?What is this object on the Falcon Heavy payload stream?Why the soot pattern on the nosecone of Falcon Heavy side booster?What are these tiles inside the Falcon 9 fairing?Why are these Falcon 9 1st stage bodies (apparently) wrapped in black plastic for transport?What are these flames on the Falcon 9 booster?What are these big shiny metallic “lumps” on the bottom edge of each Falcon Heavy nozzle?
$begingroup$
What is the white residue in a spray pattern seen on the inside of each nozzle of each side core of this Falcon Heavy image from the Teslarati article SpaceX reveals Falcon Heavy Block 5 in first official photo, timelapse. See also SpaceX tweet.
I'm thinking it could be related to engine shut-down, but it looks like they are assembling a Falcon Heavy for launch, so wouldn't the nozzles have at least been cleaned after the previous launch?
spacex falcon-heavy identify-this-object nozzle merlin-1d
asked yesterday
uhohuhoh
40.4k18151514
$endgroup$
add a comment |
$begingroup$
What is the white residue in a spray pattern seen on the inside of each nozzle of each side core of this Falcon Heavy image from the Teslarati article SpaceX reveals Falcon Heavy Block 5 in first official photo, timelapse. See also SpaceX tweet.
I'm thinking it could be related to engine shut-down, but it looks like they are assembling a Falcon Heavy for launch, so wouldn't the nozzles have at least been cleaned after the previous launch?
spacex falcon-heavy identify-this-object nozzle merlin-1d
asked yesterday
uhohuhoh
40.4k18151514
$endgroup$
$begingroup$
Looks like they need those little spike strips that keep pigeons from roosting! Very, very large space-pigeons.
$endgroup$
– Avi Cherry
11 hours ago
add a comment |
$begingroup$
What is the white residue in a spray pattern seen on the inside of each nozzle of each side core of this Falcon Heavy image from the Teslarati article SpaceX reveals Falcon Heavy Block 5 in first official photo, timelapse. See also SpaceX tweet.
I'm thinking it could be related to engine shut-down, but it looks like they are assembling a Falcon Heavy for launch, so wouldn't the nozzles have at least been cleaned after the previous launch?
spacex falcon-heavy identify-this-object nozzle merlin-1d
asked yesterday
uhohuhoh
40.4k18151514
$endgroup$
What is the white residue in a spray pattern seen on the inside of each nozzle of each side core of this Falcon Heavy image from the Teslarati article SpaceX reveals Falcon Heavy Block 5 in first official photo, timelapse. See also SpaceX tweet.
I'm thinking it could be related to engine shut-down, but it looks like they are assembling a Falcon Heavy for launch, so wouldn't the nozzles have at least been cleaned after the previous launch?
spacex falcon-heavy identify-this-object nozzle merlin-1d
spacex falcon-heavy identify-this-object nozzle merlin-1d
asked yesterday
uhohuhoh
40.4k18151514
asked yesterday
uhohuhoh
40.4k18151514
edited yesterday
uhoh
asked yesterday
uhohuhoh
40.4k18151514
asked yesterday
uhohuhoh
40.4k18151514
asked yesterday
uhohuhoh
40.4k18151514
40.4k18151514
$begingroup$
Looks like they need those little spike strips that keep pigeons from roosting! Very, very large space-pigeons.
$endgroup$
– Avi Cherry
11 hours ago
add a comment |
$begingroup$
Looks like they need those little spike strips that keep pigeons from roosting! Very, very large space-pigeons.
$endgroup$
– Avi Cherry
11 hours ago
$begingroup$
Looks like they need those little spike strips that keep pigeons from roosting! Very, very large space-pigeons.
$endgroup$
– Avi Cherry
11 hours ago
$begingroup$
Looks like they need those little spike strips that keep pigeons from roosting! Very, very large space-pigeons.
$endgroup$
– Avi Cherry
11 hours ago
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
I believe it is residue from the TEA-TEB starting fluid.
Triethylaluminum combustion produces aluminum oxides, Triethylborane produces boron oxides. Both are shades of white and grey, matching the streaks. Each engine is tested on the stand at McGregor before installation in a booster, and again in the full booster checkout, so there are several opportunities to deposit the waste, even on a new booster.
They have expressed a goal of zero refurbishment before a typical reflight, which seems to include unnecessary cleaning. They likely have enough data on engine reuse to understand the rate it builds up at, and when it may become a problem.
answered yesterday
SaibooguSaiboogu
4,2062129
$endgroup$
1
$begingroup$
This makes sense (towards zero refurbishment); and the oxides may be quite refractory. I'd wonder if the local change in emissivity could cause temperature gradients and therefore extra stress, but I assume that's been considered.
$endgroup$
– uhoh
yesterday
add a comment |
Your Answer
StackExchange.ifUsing("editor", function ()
return StackExchange.using("mathjaxEditing", function ()
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix)
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
);
);
, "mathjax-editing");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "508"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fspace.stackexchange.com%2fquestions%2f35355%2fwhat-is-the-white-spray-pattern-residue-inside-these-falcon-heavy-nozzles%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
I believe it is residue from the TEA-TEB starting fluid.
Triethylaluminum combustion produces aluminum oxides, Triethylborane produces boron oxides. Both are shades of white and grey, matching the streaks. Each engine is tested on the stand at McGregor before installation in a booster, and again in the full booster checkout, so there are several opportunities to deposit the waste, even on a new booster.
They have expressed a goal of zero refurbishment before a typical reflight, which seems to include unnecessary cleaning. They likely have enough data on engine reuse to understand the rate it builds up at, and when it may become a problem.
answered yesterday
SaibooguSaiboogu
4,2062129
$endgroup$
1
$begingroup$
This makes sense (towards zero refurbishment); and the oxides may be quite refractory. I'd wonder if the local change in emissivity could cause temperature gradients and therefore extra stress, but I assume that's been considered.
$endgroup$
– uhoh
yesterday
add a comment |
$begingroup$
I believe it is residue from the TEA-TEB starting fluid.
Triethylaluminum combustion produces aluminum oxides, Triethylborane produces boron oxides. Both are shades of white and grey, matching the streaks. Each engine is tested on the stand at McGregor before installation in a booster, and again in the full booster checkout, so there are several opportunities to deposit the waste, even on a new booster.
They have expressed a goal of zero refurbishment before a typical reflight, which seems to include unnecessary cleaning. They likely have enough data on engine reuse to understand the rate it builds up at, and when it may become a problem.
answered yesterday
SaibooguSaiboogu
4,2062129
$endgroup$
1
$begingroup$
This makes sense (towards zero refurbishment); and the oxides may be quite refractory. I'd wonder if the local change in emissivity could cause temperature gradients and therefore extra stress, but I assume that's been considered.
$endgroup$
– uhoh
yesterday
add a comment |
$begingroup$
I believe it is residue from the TEA-TEB starting fluid.
Triethylaluminum combustion produces aluminum oxides, Triethylborane produces boron oxides. Both are shades of white and grey, matching the streaks. Each engine is tested on the stand at McGregor before installation in a booster, and again in the full booster checkout, so there are several opportunities to deposit the waste, even on a new booster.
They have expressed a goal of zero refurbishment before a typical reflight, which seems to include unnecessary cleaning. They likely have enough data on engine reuse to understand the rate it builds up at, and when it may become a problem.
answered yesterday
SaibooguSaiboogu
4,2062129
$endgroup$
I believe it is residue from the TEA-TEB starting fluid.
Triethylaluminum combustion produces aluminum oxides, Triethylborane produces boron oxides. Both are shades of white and grey, matching the streaks. Each engine is tested on the stand at McGregor before installation in a booster, and again in the full booster checkout, so there are several opportunities to deposit the waste, even on a new booster.
They have expressed a goal of zero refurbishment before a typical reflight, which seems to include unnecessary cleaning. They likely have enough data on engine reuse to understand the rate it builds up at, and when it may become a problem.
answered yesterday
SaibooguSaiboogu
4,2062129
answered yesterday
SaibooguSaiboogu
4,2062129
answered yesterday
SaibooguSaiboogu
4,2062129
answered yesterday
SaibooguSaiboogu
4,2062129
4,2062129
1
$begingroup$
This makes sense (towards zero refurbishment); and the oxides may be quite refractory. I'd wonder if the local change in emissivity could cause temperature gradients and therefore extra stress, but I assume that's been considered.
$endgroup$
– uhoh
yesterday
add a comment |
1
$begingroup$
This makes sense (towards zero refurbishment); and the oxides may be quite refractory. I'd wonder if the local change in emissivity could cause temperature gradients and therefore extra stress, but I assume that's been considered.
$endgroup$
– uhoh
yesterday
1
1
$begingroup$
This makes sense (towards zero refurbishment); and the oxides may be quite refractory. I'd wonder if the local change in emissivity could cause temperature gradients and therefore extra stress, but I assume that's been considered.
$endgroup$
– uhoh
yesterday
$begingroup$
This makes sense (towards zero refurbishment); and the oxides may be quite refractory. I'd wonder if the local change in emissivity could cause temperature gradients and therefore extra stress, but I assume that's been considered.
$endgroup$
– uhoh
yesterday
add a comment |
Thanks for contributing an answer to Space Exploration Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fspace.stackexchange.com%2fquestions%2f35355%2fwhat-is-the-white-spray-pattern-residue-inside-these-falcon-heavy-nozzles%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
$begingroup$
Looks like they need those little spike strips that keep pigeons from roosting! Very, very large space-pigeons.
$endgroup$
– Avi Cherry
11 hours ago