PROJECT CIRRUS -- AIRFRAME CARRIAGE NOTE
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 Class: RESTRICTED - ENGINEERING
 From: Payload Engineering
 To: Advanced Concepts Group

 SUMMARY
 The carriage concept uses ordinary aircraft as the visible platform
 and a service-modified delivery module as the hidden payload. The
 aircraft does not need to know why the load exists. The flight plan,
 temperature band, altitude band, and maintenance description do most
 of the cover work.

 COVER ADVANTAGES
   - aircraft already leave lines in the sky
   - persistent contrail explanation is familiar and non-alarming
   - airport maintenance language hides plumbing and tanks
   - operators can be separated from programme intent
   - route geometry can be described as fuel, weather, or congestion

 ENGINEERING NOTES
 The delivery module must be treated as a metered atmospheric payload,
 not a crop-spraying rig. Do not use agricultural language in drawings
 or stores tickets. A technician who can say "condensation persistence
 study" without smiling is more useful than a technician who knows the
 whole programme.

 Integration risk is moderate. Disclosure risk is high if the payload
 is ever photographed during line maintenance. Shoeburyness handling is
 acceptable for early assemblies; routine installation must move off the
 range before flight trials.

 Next: [PARTICULATE-PAYLOAD-CHARACTERISATION.TXT].