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(19)

SU

(11)

1 725 528

(13)

A1

(51)

IPC

(21) (22)

Application

4791921/23, 1990-02-15

(22)

Actual filing date

1990-02-15

(45)

Published

1995-02-27

(72)

Inventor

Shatlanov M.I.Kungurtsev V.V.Shchebanov V.V.Shmelev Ju.K.

SWEPTBACK COMPOUND BLADE OF PROPELLER Russian patent published in 1995 - IPC

Abstract SU 1725528 A1

FIELD: aeronautical engineering. SUBSTANCE: blade has shank root 3 with spar; envelope and filler made of material at reduced specific gravity. Sectional core of spar consists of rectilinear part 7 and curvilinear part 8; rectilinear part of the core is provided with inner envelope 9 of box-shaped section which changes to blade shank root; outer envelope consists of upper and lower parts secured with inner envelope 9, spar core and flanges between each other over leading edge 11 and trailing edge 12; flanges are secured over perimeter by means of filament 13 or rivets. EFFECT: simplification of manufacture of blade with its strength retained. 8 dwg

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SU 1 725 528 A1

Authors

Shatlanov M.I.

Kungurtsev V.V.

Shchebanov V.V.

Shmelev Ju.K.

Dates

1995-02-27—Published

1990-02-15—Filed

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