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  Contents   Commitment to Environmental Excellence - Contrails

Introduction

Background

Contrail

Wingtip Condensation Trails

Exhaust Gases

Chaff and Flares

Aerial Spraying

Cloud Seeding and Fire Suppression

In-flight Emergency Fuel Release

The "Chemtrail" Hoax

Link to Related Sites

References

Layman’s Library

In Flight Emergency Fuel Release

Another common, but infrequent, procedure is the release, or venting, of fuel as a safety measure. If an in-flight emergency (IFE) is declared, a pilot will want to land the aircraft with as light a load as possible to prevent the possibility of damaging the aircraft and/or causing a fuel leak on landing. In order to lighten the fuel load a pilot can continue to fly until the fuel is burned or vent the fuel into the atmosphere. Fuel that is released, or vented, typically atomizes into a fine spray as it is released and typically evaporates before it reaches the ground. JP-8 jet fuel released at low altitudes appears as a fine mist and may not volatilize before reaching the ground surface. The release of fuel does not produce a contrail and appears more like a smoke pattern that dissipates quickly.

 

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