What is the white spray-pattern residue inside these Falcon Heavy nozzles?What are these 'Lego' plates inside...
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What is the white spray-pattern residue inside these Falcon Heavy nozzles?
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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
7 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
7 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
7 hours ago
$begingroup$
Looks like they need those little spike strips that keep pigeons from roosting! Very, very large space-pigeons.
$endgroup$
– Avi Cherry
7 hours ago
$begingroup$
Looks like they need those little spike strips that keep pigeons from roosting! Very, very large space-pigeons.
$endgroup$
– Avi Cherry
7 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 23 hours ago
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
23 hours ago
add a comment |
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1 Answer
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active
oldest
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1 Answer
1
active
oldest
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active
oldest
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active
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$begingroup$
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 23 hours ago
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
23 hours ago
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 23 hours ago
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
23 hours ago
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 23 hours ago
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 23 hours ago
SaibooguSaiboogu
4,2062129
answered 23 hours ago
SaibooguSaiboogu
4,2062129
answered 23 hours ago
SaibooguSaiboogu
4,2062129
answered 23 hours ago
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
23 hours ago
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
23 hours ago
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
23 hours ago
$begingroup$
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
23 hours ago
add a comment |
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$begingroup$
Looks like they need those little spike strips that keep pigeons from roosting! Very, very large space-pigeons.
$endgroup$
– Avi Cherry
7 hours ago