DE2415172A1 - Variable profile foam filled wing - with underside having variable shape from vacuum applied to bulk of profile - Google Patents

Variable profile foam filled wing - with underside having variable shape from vacuum applied to bulk of profile

Info

Publication number
DE2415172A1
DE2415172A1 DE2415172A DE2415172A DE2415172A1 DE 2415172 A1 DE2415172 A1 DE 2415172A1 DE 2415172 A DE2415172 A DE 2415172A DE 2415172 A DE2415172 A DE 2415172A DE 2415172 A1 DE2415172 A1 DE 2415172A1
Authority
DE
Germany
Prior art keywords
wing
profile
underside
variable
vacuum applied
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.)
Pending
Application number
DE2415172A
Other languages
German (de)
Inventor
Bernhard Ruenzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Priority to DE2415172A priority Critical patent/DE2415172A1/en
Publication of DE2415172A1 publication Critical patent/DE2415172A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C3/00—Wings
    • B64C3/38—Adjustment of complete wings or parts thereof
    • B64C3/44—Varying camber

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The wing profile has a rigid upper surface profiled to the selected shape and with the front and rear edges braced by insert strips. The underside of the wing profile is of rubber while the wing itself is filled with rubber plastic foam. To increase the lift of the wing for STOL the inside the wing is coupled to a vacuum line which then draws in the underside profile until the underside is convex. The amount of shape variation is controlled by the amount of vacuum applied, and is finely adjustable.

Description

Titel: Tragflügel variabler Profilgeometrie mit weitem Geschwindigkeitsbereich.Title: Airfoil of variable profile geometry with a wide speed range.

Kurzauszzug: Tragflügel mit stufenlosem Übergang zwischen Langsam-und Schnellflugprofil.Short extension: hydrofoil with stepless transition between slow and Fast flight profile.

#ie Flügelunterseite wird verformt.#the underside of the wing is deformed.

Beschreibung Bei den hier vorgeschlagenen Tragflügel handelt es sich um einen kostengünstigen, wirkungsvollen und einfachen Flügel mit großem Geschwindigkeitsbereich.STOL-Flugzeuge mit relativ hoher Unterschallgeschwindigkeit dürften der Einsatzbereich für diesen Flügel sein,der im unteren Geschwindigkeitsbereich einen hohen Auftrieb ohne die üblichen komplizierten externen Auftriebshilfen erreicht.Description The hydrofoils proposed here are an inexpensive, effective and simple wing with a wide speed range STOL aircraft with a relatively high subsonic speed should be the area of application for this Be a wing that has a high lift in the lower speed range without the usual complicated external buoyancy aids achieved.

Funktion (zu Bild I) Die Flüvelunterseite besteht aus wetterfestem Gummi.Ein hochelastisches,leichtes Schaumstoffmaterial füllt den flügel aus.Function (to picture I) The underside of the wing is made of weatherproof Rubber. A highly elastic, lightweight foam material fills the wing.

Die Gummifolie(oder ein ähnliches Material)ist ist auf die Spanten und den Schaumstoff aufvulkanisiert.Sie ist vorgeaspannt.The rubber sheet (or similar material) is on the bulkheads and the foam is vulcanised on. It is pre-tensioned.

Im Start-Lande-und Langsamflugfall wird im Inneren des Iuftdichten Flügels über eine Entlüftungseinrichtung ein Unterdruck erzeugt,dadurch wölbt sich das Guinmi der Flügelunterseite nach innenund drückt den Schaumstoff zusammen.Der hierzu erforderliche Unterdruck liegt bei einigen hundert mm Wassersäule.In the case of take-off, landing and slow flight, the interior of the air is tight The wing generates a negative pressure via a venting device, causing it to bulge the Guinmi of the underside of the wing inwards and compresses the foam the negative pressure required for this is a few hundred mm water column.

Die Flügelgeometrie "langsam" wird im Extremfall durch die Formgebung des Schaumstoffes bestimmt.In the extreme case, the wing geometry is "slow" due to the shape of the foam determined.

Zwischenwerte sind durch die schwingungsdämpfenden Eigenschaaten des Schaumstoffs möglich,sie können durch Variation des Unterdruckes eingestellt werden.Intermediate values are due to the vibration-damping properties of the Foam possible, they can be adjusted by varying the negative pressure.

Im Schnellflugfall wird im Flügel ein geringer Überdruck erzeugt,der Kor rekturzwecken dient und die Flügelunterseite leicht bläht.In the case of high-speed flight, a slight overpressure is generated in the wing, the Corrective purposes are used and the underside of the wing inflates slightly.

Die Flügeloberseite ist starr.The top of the wing is rigid.

Allgemeines Wie aus Bild I ersichtlich,kann der Tragflügel aus "Formzellen" bestehen.Die im Langsamflug hervortretenden Spanten können auftriebsmindernd und/oder stabilisierend wirken.Sie können jedoch auch die Form der Flügelgeometrie "langsam" haben und treten beim Langsamflug nicht hervor.Siehe Bild II Allgemeines Der Schaumstoff im Flügelinneren hat nicht nur eine formende und dämpfende Funktion,er wirkt im Langsamflugfall kraftausgleichend auf den oberen Flügelteil,der dadurch von dem im Flügel herrschenden Unterdruck wenig verformt wird.Der Schaumstoff muß nicht den ganzen Flügel ausfüllen.Siehe Bild II Bemerkung Dieser Flügel ist bei Tiefdeckern besonders wirkungsvoll.Er gestattet die Ausnutzung des Bodeneffektes.General As can be seen from Figure I, the wing can be made of "shape cells" The ribs protruding in slow flight can reduce lift and / or have a stabilizing effect. However, you can also change the shape of the wing geometry "slowly" have and do not protrude when flying slowly, see Figure II General The foam inside the wing not only has a shaping and cushioning function, it has a force-balancing effect on the upper part of the wing in slow flight is little deformed by the negative pressure prevailing in the wing. The foam must do not fill in the whole wing. See Fig. II Note This wing is at Particularly effective for low-wing aircraft, allowing the ground effect to be exploited.

Rine Formzelle ohne Schaumstoffüllung zeigte bei ersten Versuchen befriedigende Ergebnisse.Rine molded cell without foam filling showed in the first tests satisfactory results.

Claims (2)

Patentansprüche:Patent claims: 1. Gelenklose Unterdruckprofilverstellung von Tragflügeln mit weitem Geschwindigkeitsbereich mittels elastischer Flügelunterseite.1. Jointless vacuum profile adjustment of wings by far Speed range by means of the elastic underside of the wing. 2. Ausfüllung des Flügels mit elastischem Schaumstoff zur Formgebung, Kraftkompensation und Schwingungsdämpfung.2. Filling the wing with elastic foam for shaping, Force compensation and vibration damping. L e e r s e i t eL e r s e i t e
DE2415172A 1974-03-29 1974-03-29 Variable profile foam filled wing - with underside having variable shape from vacuum applied to bulk of profile Pending DE2415172A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2415172A DE2415172A1 (en) 1974-03-29 1974-03-29 Variable profile foam filled wing - with underside having variable shape from vacuum applied to bulk of profile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2415172A DE2415172A1 (en) 1974-03-29 1974-03-29 Variable profile foam filled wing - with underside having variable shape from vacuum applied to bulk of profile

Publications (1)

Publication Number Publication Date
DE2415172A1 true DE2415172A1 (en) 1975-10-16

Family

ID=5911527

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2415172A Pending DE2415172A1 (en) 1974-03-29 1974-03-29 Variable profile foam filled wing - with underside having variable shape from vacuum applied to bulk of profile

Country Status (1)

Country Link
DE (1) DE2415172A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4235397A (en) * 1978-04-29 1980-11-25 British Aerospace Flow deflector blades

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4235397A (en) * 1978-04-29 1980-11-25 British Aerospace Flow deflector blades

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