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tbzep 04-07-2021 03:54 PM

Buckets on Boosters
 
What are the buckets for on the outboard boosters?
https://www.nasa.gov/sites/default/...e8182e15_o.jpeg

TigerHawk 04-07-2021 04:25 PM

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?

Earl 04-07-2021 04:30 PM

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.

Earl

jeffyjeep 04-07-2021 05:19 PM

F.O.D. collection possibly?

LeeR 04-07-2021 05:27 PM

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.

frognbuff 04-08-2021 06:45 AM

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.

tbzep 04-08-2021 08:09 AM

The central core stage doesn't have one, so I'm sure Lee is just yanking our chain. We know they use a single igniter on the core and use thermalite to air start the sparky strap-ons. Unlike our BATFE, they haven't outlawed thermalite and igniters yet. ;)

Rocketflyer 04-08-2021 10:02 AM

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.


:cool: :chuckle: :chuckle:

LeeR 04-08-2021 03:20 PM

Quote:
Originally Posted by tbzep
The central core stage doesn't have one, so I'm sure Lee is just yanking our chain. We know they use a single igniter on the core and use thermalite to air start the sparky strap-ons. Unlike our BATFE, they haven't outlawed thermalite and igniters yet. ;)


Tim, you caught me ... It was an April Fools joke, which occurs later in Russia than the USA — on Aprilsky 7.

TigerHawk 04-08-2021 05:06 PM

Quote:
Originally Posted by LeeR
Tim, you caught me ... It was an April Fools joke, which occurs later in Russia than the USA — on Aprilsky 7.


:chuckle: :chuckle:


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