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DE3916706A1 - Inflatable aerofoil gliding parachute - has outlet holes to permit through-flow of inflating air - Google Patents

Inflatable aerofoil gliding parachute - has outlet holes to permit through-flow of inflating air

Info

Publication number
DE3916706A1
DE3916706A1 DE19893916706 DE3916706A DE3916706A1 DE 3916706 A1 DE3916706 A1 DE 3916706A1 DE 19893916706 DE19893916706 DE 19893916706 DE 3916706 A DE3916706 A DE 3916706A DE 3916706 A1 DE3916706 A1 DE 3916706A1
Authority
DE
Germany
Prior art keywords
air
parachute
gliding
flow
aerofoil
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.)
Withdrawn
Application number
DE19893916706
Other languages
German (de)
Inventor
Joachim Dipl Phys Dr Artmann
Hans Artmann
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 DE19893916706 priority Critical patent/DE3916706A1/en
Publication of DE3916706A1 publication Critical patent/DE3916706A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D17/00—Parachutes
    • B64D17/02—Canopy arrangement or construction
    • B64D17/025—Canopy arrangement or construction for gliding chutes

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)

Abstract

The gliding parachute has holes in the leading edge, which enable air to flow into the parachute and inflate it to form an aerofoil cross-section. In existing gliding parachutes of this type there is no outlet for the air. There are air outlets (4) in the rear part of the upper surface of the aerofoil. The air flowing from these outlets (4) flows tangentially over the upper surface of the parachute. These outlets holes prevent the formation of vortices at the inlet holes (2) and improve the gliding characteristics of the parachute. USE - Gliding parachute inflated to form aerofoil section.

Description

Technische AufgabeTechnical task

Erhöhung des Auftriebs und Verringerung des Widerstandes von Gleitschirmprofilen zur Verbeserung des Gleitwinkels bzw. der Gleitzahl und Erhöhung der Fluggescgwindigkeit.Increasing buoyancy and reducing drag of paraglider profiles to improve the glide angle or the glide ratio and increase the flight speed.

Beschreibungdescription

Bei Gleitschirmen bildet sich das flugfähige Profil 1 (siehe Abbildung) durch Aufblasen des Schirmes. Dazu werden im vorderen Teil des Profils Lufteintrittsöffnungen installiert, über die durch von der Anströmung erzeugten Überdruck Luft einströmt.In the case of paragliders, the airworthy profile 1 (see illustration) is formed by inflating the glider. For this purpose, air inlet openings are installed in the front part of the profile, through which air flows in due to the excess pressure generated by the inflow.

Üblicherweise wird die Luft im Schirm vollkommen aufgestaut.The air is usually completely blocked in the screen.

An den Lufteintrittsöffnungen 2 treten verstärkt Verwirbelungen auf, die den Auftrieb verringern und den Widerstand erhöhen. Diese Störungen können gemindert werden, wenn Luft an den Eintrittsöffnungen 2 auch während des Fluges einströmen kann (Absaugen der Wirbelzone).At the air inlet openings 2 , turbulence occurs which reduce the buoyancy and increase the resistance. These disturbances can be reduced if air can also flow in at the inlet openings 2 during the flight (suction of the vortex zone).

Hierzu werden Luftaustrittsöffnungen im hinteren Profilbereich eingeführt (3 und 4).For this purpose, air outlet openings are introduced in the rear profile area ( 3 and 4 ).

Zur Verstärkung der Zirkulation wird die Luft bevorzugt an der hinteren Profilkante nach unten ausgeblasen 3.To increase circulation, the air is preferably blown down at the rear profile edge 3 .

Darüber hinaus kann durch tangential im oberen hauptsächlich hinteren Bereich des Profiles ausblasende Luft 4 die Strömung beschleunigt und ein besseres Anliegen der Strömung an das Profil erreicht werden.In addition, the air can be accelerated by tangential air 4 blowing out tangentially in the upper rear region of the profile, and the flow can be brought closer to the profile.

Um sichere Flugbedingungen und möglichst hohe Luftaustrittsgeschwindigkeiten zu erreichen, ist im Vegleich zur Lufteintrittsfläche eine kleinere Gesamtaustrittsfläche vorgesehen.For safe flight conditions and the highest possible air outlet speeds to reach is a smaller one compared to the air inlet area Total exit area provided.

Die Lufteintrittsöffnung ist möglichst im Bereich des vorderen Staupunktes 1 unterzubringen.The air inlet opening is to be accommodated as far as possible in the area of the front stagnation point 1 .

Vorteile/Kern des PatentesAdvantages / core of the patent

Verringerung der Wirbelbildung an Lufteintrittsöffnungen durch Absaugen. Vergrößerung des Auftriebs und Verringerung des Widerstandes durch Ausströmen der durch die vordere Öffnung eintretenden Luft am Profil hinten.Reduction of eddy formation at air inlet openings by suction. Increasing buoyancy and reducing drag through Outflow of air entering the profile through the front opening behind.

Claims (3)

1. Gezieltes Anbringen von Luftaustrittsöffnungen an Gleitschirmprofilen, deren Luftaustritt durch übliche Öffnung für Lufteintritt im vorderen Tragflügelbereich gespeist wird.1. Targeted attachment of air outlet openings on paraglider profiles, whose air outlet through the usual opening for air entry in the front Wing area is fed. 2. Anbringen von Luftaustrittsöffnungen (Schlitze o. ä.) nach Anspruch 1 am hinteren Tragflügelbereich unten zur Erhöhung der Zirkulation.2. Attaching air outlet openings (slots or the like) according to claim 1 on the rear wing area to increase circulation. 3. Anbringen von Luftaustrittsöffnungen nach Anspruch 1 im oberen Tragflügelbereich zur Erreichung einer tangential am Profil anliegenden Ausströmung.3. Attaching air outlet openings according to claim 1 in the upper wing area to achieve a tangent to the profile Outflow.
DE19893916706 1989-05-20 1989-05-20 Inflatable aerofoil gliding parachute - has outlet holes to permit through-flow of inflating air Withdrawn DE3916706A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893916706 DE3916706A1 (en) 1989-05-20 1989-05-20 Inflatable aerofoil gliding parachute - has outlet holes to permit through-flow of inflating air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893916706 DE3916706A1 (en) 1989-05-20 1989-05-20 Inflatable aerofoil gliding parachute - has outlet holes to permit through-flow of inflating air

Publications (1)

Publication Number Publication Date
DE3916706A1 true DE3916706A1 (en) 1990-11-22

Family

ID=6381198

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893916706 Withdrawn DE3916706A1 (en) 1989-05-20 1989-05-20 Inflatable aerofoil gliding parachute - has outlet holes to permit through-flow of inflating air

Country Status (1)

Country Link
DE (1) DE3916706A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676032A1 (en) * 1991-05-03 1992-11-06 Julien Pierre Aerodynamic device with great adjustable lift

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676032A1 (en) * 1991-05-03 1992-11-06 Julien Pierre Aerodynamic device with great adjustable lift

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Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee