Downwash Vectoring Louvers

Downwash vectoring louvers are the mechanism the source dossier attributes to the Focke Rochen for achieving forward flight from a vertical-lift configuration. The source states that "the Fw-Rochen would have achieved forward flight by vectoring the downwash from the propellers rearward through a series of louvers below them."

Claimed operation

• The Contra-Rotating Propellers in the Circular-Wing Annular-Duct Configuration produce a downward flow for vertical lift.
• A series of louvers below the propellers redirects that flow rearward, producing forward thrust.
• "The louvers themselves could also be completely closed for gliding flight in the event of engine failure" — that is, the closed position is claimed to restore a gliding configuration.

Evidence status

The source describes the mechanism entirely in the conditional mood ("would have achieved"). The Rochen was never built, and the page reports no wind-tunnel or flight data for the louver arrangement. The claim is therefore recorded as a design proposal, not a demonstrated result.

Related mechanisms on the same aircraft

• Auxiliary Combustion Chambers (Rochen) — the trailing-edge afterburner arrangement claimed to provide horizontal flight.
• VTOL Aircraft — the operational category.