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Old December 21st 18, 05:26 PM posted to sci.space.policy
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Default BFS drops composite construction

Meanwhile, Boeing continues work on composite tanks for the Phantom Express:

"This vehicle will be the first space vehicle to utilize the much lighter
composite cryotanks, saving nearly 40 percent of weight from comparable aluminum
tanks. All of these innovative measures will help Phantom Express achieve its
operational goal of daily flights to space."

See:

https://www.boeing.com/features/2018...ion-11-18.page