FR712139A - Propulsion device for air navigation devices - Google Patents

Propulsion device for air navigation devices

Info

Publication number
FR712139A
FR712139A FR712139DA FR712139A FR 712139 A FR712139 A FR 712139A FR 712139D A FR712139D A FR 712139DA FR 712139 A FR712139 A FR 712139A
Authority
FR
France
Prior art keywords
propulsion device
navigation devices
air navigation
air
devices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Prokop Jakub Prokop
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR712139A publication Critical patent/FR712139A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/005—Spiral-shaped propellers

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
FR712139D 1931-02-26 1931-02-26 Propulsion device for air navigation devices Expired FR712139A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR712139T 1931-02-26

Publications (1)

Publication Number Publication Date
FR712139A true FR712139A (en) 1931-09-25

Family

ID=9078538

Family Applications (1)

Application Number Title Priority Date Filing Date
FR712139D Expired FR712139A (en) 1931-02-26 1931-02-26 Propulsion device for air navigation devices

Country Status (1)

Country Link
FR (1) FR712139A (en)

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