Aircraft turboprop engine comprising two coaxial propellers

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United States of America Patent

PATENT NO 9776707
SERIAL NO

14723990

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Abstract

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The invention relates to an aircraft turboprop engine having two unducted propellers, coaxial about a rotation axis (LL), respectively upstream (12) and downstream (14′), each propeller comprising an annular row of blades, the blades of the downstream propeller (14′) each having a truncated head and each comprising a leading edge (20′) and a trailing edge (22′), the radially external ends (A2, B1) of which are distant from each other and are connected by a terminal edge (21′), characterised in that the terminal edge (21′) of each blade of the downstream propeller (14′) has, at at least two points, tangents in a meridian plane having different slopes, the upstream end (A) of the terminal edge defining a maximum radial dimension (R2) of the blade and its downstream end (B1) defining a minimum radial dimension (R3) of the terminal edge.

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Patent Owner(s)

Patent OwnerAddress
SAFRAN AIRCRAFT ENGINES2 BOULEVARD DU GÉNÉRAL MARTIAL VALIN PARIS 75015

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dejeu, Clement Marcel Maurice Fontenailles, FR 8 28
Louet, Anthony Pascal Eloi Alfortville, FR 2 6
Vlastuin, Jonathan Evert Charenton Le Pont, FR 11 41

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