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  2. Mick West

    Mick West Administrator Staff Member

    It's a patent (3899144) for creating a visible trail on a towed target (a target towed behind another plane, and used for target practice). Normally they use smoke created with heat from the engine to create a visible trail, but in the towed target there is no heat source.

    The entire aim of the patent is to create the VISUAL of a contrail.


    Here's what the "contrail" will be emerging from - a "towed target"

    It seems like they are more likely to use flares now, which also gives the benefit of simulating the engine heat source.



    Spraying things from a plane is not rocket science.

    One also has to ask why this is considered evidence of a secret plot. Why patent something if you want to keep it secret?
    Last edited: Nov 30, 2013
  3. Dorion

    Dorion New Member

    Sorry, Mick. I believe the patent that is being referred to is actually US 3899144 A, "Powder Contrail Generation."

    "Light scattering pigment powder particles, surface treated to minimize interparticle cohesive forces, are dispensed from a jet mill deagglomerator as separate single particles to produce a powder contrail having maximum visibility or radiation scattering ability for a given weight material."

    The device actually looks like this:


    Attached Files:

    Last edited by a moderator: Nov 30, 2013
  4. Mick West

    Mick West Administrator Staff Member

    Yes, that's the patent. Are you disagreeing with something?

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