PAYLOAD USER’S GUIDE

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Falcon User’s Guide 4. ENVIRONMENTS Falcon 9 has been designed to provide as benign a payload environment as possible, via the use of allliquid propulsion, a single staging event, deeply throttleable engines and pneumatic separation systems. The environments presented below reflect typical mission levels for a Falcon 9; mission-specific analyses will be performed and documented in an interface control document for each contracted mission. 4.1 Transportation Environments SpaceX recommends using the quasi-static limit load factors provided by NASA-HDBK-7005 (Table 4-1). SpaceX has quantified the maximum predicted environments experienced by the payload during transportation. Transportation will be accomplished by two wheeled vehicles: a payload transporter from the payload processing facility to the hangar, and the launch vehicle transporter-erector from the hangar to the launch pad. It is expected that transportation environments will be enveloped by the flight environments in Section 4.3. Transportation Method Table 4-1: Recommended quasi-static load factors for transportation Longitudinal Load (g) Lateral Load (g) Vertical Load (g) Slow-moving dolly (expected ground transport loads) ± 1.0 ± 0.75 ± 2.0 4.2 Temperature, Humidity and Cleanliness The standard service temperature, humidity and cleanliness environments during various processing phases are provided in Table 4-2. SpaceX can accommodate environments outside the standard service, e.g. ISO Class 7 (Class 10,000) cleanroom cleanliness. Please contact SpaceX for details. Conditioned air will be disconnected for a short duration during rollout to the pad. Spacecraft environmental temperatures will be maintained above the dew point of the supply air at all times. A nitrogen purge is available as a nonstandard service. The payload attach fitting (PAF) and fairing surface are cleaned to Visibly Clean-Highly Sensitive, achieving a residue level between A/5 and A/2 and particulate between 300-500 micron, per IEST-STD-CC1246D. Table 4-2: Temperature and cleanliness environments Phase Spacecraft processing Control System Payload processing facility heating, ventilation and air conditioning (HVAC) Approx. Duration Temp. °C (°F) Humidity Cleanliness (class) Flow Rate (cfm) 3 weeks 21 ± 3 (70 ± 5) 50% ± 15% 100,000 N/A Revision 2 © 2015 Space Exploration Technologies Corp. All rights reserved. 18
Falcon User’s Guide Propellant conditioning Facility heating, ventilation and air conditioning (HVAC) 3 days 21 ± 3 (70 ± 5) 50% ± 15% 100,000 (Class 8) N/A Spacecraft propellant loading Transport to hangar (CCAFS only) Encapsulated in hangar Encapsulated roll-out to pad Encapsulated on pad (vertical or horizontal) Facility heating, ventilation and air conditioning (HVAC) Transport trailer unit Ducted supply from hangar facility HVAC Mission- Unique 21 ± 3 (70 ± 5) 50% ± 15% 100,000 (Class 8)
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PAYLOAD USER’S GUIDE

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