Author Topic: Falcon 9 Launch towers  (Read 746 times)

Online Slarty1080

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Falcon 9 Launch towers
« on: 02/17/2019 01:57 pm »
What are those short towers around the launch pad of Falcon 9 used for?
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Offline Orbiter

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Re: Falcon 9 Launch towers
« Reply #1 on: 02/17/2019 01:58 pm »
Lightning protection.
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Offline Jim

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Re: Falcon 9 Launch towers
« Reply #2 on: 02/17/2019 03:09 pm »
Leftovers from Titan IV

Online ugordan

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Re: Falcon 9 Launch towers
« Reply #3 on: 02/17/2019 03:26 pm »
Plus, they're not exactly short. They're what, 250 feet tall just to the bottom of that white cylinder, which is another 150 ft high?
« Last Edit: 02/17/2019 03:28 pm by ugordan »

Offline PM3

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« Last Edit: 02/17/2019 04:46 pm by PM3 »

Online Slarty1080

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Re: Falcon 9 Launch towers
« Reply #5 on: 02/17/2019 06:21 pm »
Why not just a metal spike at the top? What's with the white cylinder bits?
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Online ugordan

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Re: Falcon 9 Launch towers
« Reply #6 on: 02/17/2019 06:27 pm »
Because the towers themselves are not meant to be isolated ligthning rods. If you look carefully at SLC-40 imagery, you'll see catenary wires going between all four towers and a middle grid inside that one. The purpose of the towers is to create a "net" by shielding the launch vehicle from high electric field tension when a lightning strike hits, sort of like a Faraday cage does. It's not supposed to *attract* lightning.

Offline PM3

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Re: Falcon 9 Launch towers
« Reply #7 on: 02/17/2019 07:12 pm »
What's with the white cylinder bits?

"The big top rods are insulators  ... spun fiber in polymer matrix structure ... at the time the biggest such cylinder in the world."

"The fiberglass (FRP) tubes on the top of the launch platforms are a part of a lightning protection system and are insulators with cables that form a cone of protection for the launch tower. They were designed by my former company CH2M HILL, (Gainesville,FL)an engineering firm, and were manufactured by Starline Fabricators, Astatula, FL"

https://space.stackexchange.com/questions/2958/what-are-the-towers-around-the-spacex-launch-pad-used-for
« Last Edit: 02/17/2019 07:17 pm by PM3 »

Online Slarty1080

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Re: Falcon 9 Launch towers
« Reply #8 on: 02/17/2019 08:38 pm »
thx - does that mean that Starship will need an even bigger set up? Or will that be different because its made of Stainless?
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