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The Bird 9 (the falcon 9 explained using the 1000 words people use most regularly)

Stashed in: @elonmusk, space, Space!, SpaceX!

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It really makes you think much harder than if you were to read the actual description for the units.  the up side is that kids can understand this and have fun deciphering it


Yeah, I'm having trouble understanding it!

Explanation from Reddit comments:

I wasn't able to understand this, so I translated it:

  • Falcon 9 is the first LV that may be reusable and supplant the current EELV market by performing RTLS and enabling rapid reuse to reduce launch costs.

  • Atop the rocket is the payload fairing, made of Aluminum honeycomb bonded to a carbon fiber laminate with cork, designed to protect the fragile payload inside from the aerodynamic forces that the rocket is subjected to upon launch (especially important at Max-Q!).

  • Inside the fairing is the payload, often a heavy comsat or hotbird heading to a 1800m/s deficit GTO, to be deployed approximately 30 minutes to 1 hour after launch. It is loaded onto the vehicle in the PIF at the LC, often after the SF has taken place.

  • The upper stage of F9 uses a single MVac to power into orbit, which combusts the Falcon-architecture's standard mix of refine RP-1 & LOX to produce a vac thrust of 801 kN (180 klbf). To achieve an optimal vac. Isp of 340s (dat expansion ratio), the extension skirt is manufactured out of Niobium metal. Because of the difference in temperatures between the oxidizer & fuel, F9 does not employ a common bulkhead. With all this, F9 can deliver over 13t to a 200x200km LEO with a 43.5 deg incl.

  • To keep the stage at appropriate pressurization, He, stored in COPV's, is located within the second stage and slowly released into the main tanks as the reactants are expended.

  • Merlin is a turbopump based solution and does not employ full flow or staged combustion for simplicity. For roll control, the turbopump exhaust can be used.

  • The first stage consists of similar componentry, including larger, He COPV's. The stage consists of 9 M1D's, each generating 720kN of thrust (chamber pressure of 9.7MPa), and inducing an aerospike-like affect on the center engine. In fact, the 150:1 TWR of M1D is the highest ever achieved in a rocket engine. Be aware though, if the thrust vector is not very similar to the velocity vector, range will be commanded to terminate flight and prevent the IIP straying outside the designated corridor.

  • Following MECO, the RCS/ACS & grid fins control the first stage's orientation as it performs three burns to slow its velocity and descend back into the atmosphere.

  • At the base of F9 lies four landing legs, with a weight of approximately 1 TMS (standard unit of measure) - thankfully they don't need to support the entire GLOW of the vehicle, only the 20t or so that remain during landing. During the final phases of the RTLS portion of flight, in the subsonic regime, He pressurant opens the legs and they assume a locked position before the vehicle touches down at 0m alt with a vel of 0m/s. Ablative paint protects the legs from the hot exhaust of the central M1D.

Found here:

TMA.  Too Many Acronyms.

The point of the Bird 9 is to de-explicate.  :) 

Plus, it's cute.  "Fire comes out here"

Ha! I know. 

The funny thing is the Reddit comment after that one: "FINALLY someone who speaks English."

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