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  #1  
Old 04-07-2021, 03:54 PM
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Default Buckets on Boosters

What are the buckets for on the outboard boosters?
https://www.nasa.gov/sites/default/...e8182e15_o.jpeg
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Old 04-07-2021, 04:25 PM
TigerHawk TigerHawk is offline
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At first I thought they were some kind of power transformer, but they have an open ended hose coming out of the bottom of them. Are the boosters liquid or solid fuel powered?
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Old 04-07-2021, 04:30 PM
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The boosters are liquid.

I was wondering if it is some sort of low positive pressure purge system for the empty liquid fuel tanks on the boosters, but those ‘buckets’ do not seem large enough to handle the volume of pressurized air (nitrogen or helium, usually) to adequately do that. Plus, that hose out the bottom of each looks more like a ‘drain’ almost of some kind.

So, not really sure what they are.

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Old 04-07-2021, 05:19 PM
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F.O.D. collection possibly?
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Old 04-07-2021, 05:27 PM
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The buckets contain coiled up “starters” (interestingly, the Russians frown on the use of the term “igniters”, too). These are inserted while horizontal, to make sure they are fully seated. Then the plastic plugs are installed. To this day, much arguing ensues regarding connecting in parallel, or serially.
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Old 04-08-2021, 06:45 AM
frognbuff frognbuff is offline
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Great question! I have always wondered about those devices too!

What is your source, Lee? Or are you just having fun? To me, these are definitely a fluid reservoir of some sort, since the designers went out of their way to have all four buckets in the "tube UP" orientation during horizontal assembly and transport. A hydraulic accumulator would likely work in any orientation, so that probably isn't it.

Russian designers like to use a hypergolic "starter fuel" - one that reacts with LOX - to ignite their LOX/Kerosene engines. If that were the case, then one would also expect a "bucket" on the core too, but I don't see one there.
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Old 04-08-2021, 10:02 AM
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Quote:
Originally Posted by LeeR
The buckets contain coiled up “starters” (interestingly, the Russians frown on the use of the term “igniters”, too). These are inserted while horizontal, to make sure they are fully seated. Then the plastic plugs are installed. To this day, much arguing ensues regarding connecting in parallel, or serially.


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Old 04-11-2021, 01:59 AM
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Quote:
Originally Posted by LeeR
The buckets contain coiled up “starters” (interestingly, the Russians frown on the use of the term “igniters”, too). These are inserted while horizontal, to make sure they are fully seated. Then the plastic plugs are installed. To this day, much arguing ensues regarding connecting in parallel, or serially.


Well, "start" is their word for launch. And the launch pad, for that matter.
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Old 04-11-2021, 01:57 AM
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Quote:
Originally Posted by tbzep
What are the buckets for on the outboard boosters?
https://www.nasa.gov/sites/default/...e8182e15_o.jpeg


Seems to be something for when the rocket is horizontal on the transporter/railway car. They may get detached before the rocket flies. (hey, sorry for being obvious, but I just got here)
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