DE4014933A1

DE4014933A1 - Ultra-light aircraft with textile wing - is made from woven material which is inflated to produce required aerodynamic profile

Info

Publication number: DE4014933A1
Application number: DE19904014933
Authority: DE
Inventors: Walter Dipl Ing Pahling
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-05-10
Filing date: 1990-05-10
Publication date: 1991-11-14

Abstract

An ultra light aircraft has a wing with a delta shaped platform. The wing is made from a woven material supported on a frame and can be compactly folded so that it can be transported on a trailer which can be towed by a private car. The wing material is air and water tight and its frame is attached to stiffeners extending from the cockpit floor. The aerodynamic profile of the wing is produced by inflating it to a pressure slightly above that of the atmosphere. USE - Ultra-light aircraft.

Description

State of the art

In der Klasse der UL-Flugzeuge gibt es die verschiedensten Ausführungen: Wasserflugzeuge, Landflugzeuge, auch mit Schwimmern und auch mit faltbarem Flügel. Aber alle verwenden gestreckte Flügel und die meisten außenliegende Verspannungen als Leichtbauweise. Für UL-Flugzeuge wurde bisher weder ein Deltaflügel relativ starker Pfeilung verwendet, noch wurde die Konturerzeugung durch inneren Überdruck eingesetzt, die es erlaubt, die erforderlichen Versteifungen in den Flügel zu verlegen, ohne dabei auf die Holmbauweise angewiesen zu sein, aber hohe aerodynamische Güte zu erzielen. Nur wenige Typen gestatten das Beiklappen der Flügel, nur ein Modell das Falten, um die Standfläche zu verkleinern. Wenn die Demontage der Flügel und anderer Teile zum Transport vorgesehen ist, dann dauert sie meist so lange, daß darauf in der Regel verzichtet wird. Bisher ist es nicht gelungen, alle wünschenswerten Eigenschaften in einem Modell zu vereinigen.There are many different types of UL aircraft Versions: seaplanes, landplanes, also with floats and also with a foldable wing. But everyone uses stretched ones Sash and most external tension as lightweight construction. So far, neither a delta wing has been used for UL aircraft relatively strong sweeping was used, still the contour generation used by internal pressure, which allows the necessary Lay stiffeners in the wing without doing so the spar construction is dependent on, but high aerodynamic To achieve goodness. Only a few types allow you to fold the Wings, only one model folding to reduce the footprint. When disassembling the wing and other parts for transportation is provided, it usually lasts so long that in the Rule is waived. So far, not everyone has succeeded to combine desirable properties in one model.

task

Der vorliegende Entwurf eines deltaförmigen, faltbaren und straßentransporttauglichen Ultraleicht-Flugzeuges macht es sich zur Aufgabe, alle wünschenswerten Eigenschaften eines Freizeit-Flugzeugs (der UL-Klasse) erstmalig in einem Flugzeugmodell zu integrieren.The present design of a delta-shaped, foldable and road-transportable ultralight aircraft makes it the Task, all desirable properties of a leisure aircraft (of the UL class) for the first time in an aircraft model.

solution

Es handelt sich also um eine einheitliche Aufgabe, zu deren Lösung die Entwicklung einer Reihe verschiedener ineinandergreifender Lösungen von Teilproblemen erforderlich war. Diese kennzeichnenden Merkmale sind im Abschnitt "Patentanspruch" beschrieben. Zu ihrer Detaillierung werden folgende Abbildungen angefügt:So it is a unified task, to whose Solution developing a number of different interlocking Solutions to sub-problems were required. These are characteristic Features are described in the "Claim" section. The following figures are added to detail:

Abb. 1: Grundriß Fig. 1: Floor plan

Abb. 2: Seitenansicht Fig. 2: side view

Abb. 3: Längsschnitt mit Antrieb, Fahrwerk und Kufen (Skids) Fig. 3: Longitudinal section with drive, chassis and skids

Abb. 4: Querschnitt mit Fallschirm-Paketen Fig. 4: Cross section with parachute packages

Abb. 5: Faltvorgang Fig. 5: Folding process

Abb. 6: Transport-Konfiguration Fig. 6: Transport configuration

Claims

The subject of the application is an ultralight aircraft, which is characterized in that it consists of a foldable fabric wing with a frame and the remaining elements of which are integral parts of the wing. The foldability enables transport as a car trailer.
The following claims are made:

1. Delta wing made of airtight and waterproof fabric (film) with the appropriate cut.
2. Internal (electric motor) foldable frame, the stiffening of which starts from the cockpit floor.
3. Generation of an aerodynamically smooth contour by slight excess pressure in the wing fabric; the "compressed air" is taken from the drive system.
4. The cockpit is integrated in the wing with a corresponding cutout in the upper skinning.
5. The landing gear is attached to the cockpit floor and has a waterproof, elastic penetration of the lower wing skin.
6. Skids are attached to the undercarriage and the lower wing skin. They also represent aerodynamic fairing, skis and skids for use as a seaplane. For the latter purpose they have an (electromotive) extendable part for wheel cover.
7. One or two motors with impellers (semi-axial fan rotors) are used as the drive, which suck in air from inlets in the upper wing skin and expel it through a fabric push tube on the rear edge of the wing. There are thrusters in the jet outlet.
8. There are two rescue parachutes in the upper wing wing, which can be ejected by the overpressure in the wing.
9. When folded, a standard trailer hitch can be mounted on the front runner. The plane is protected by a stuff sack. The pack sack contains the prescribed car trailer electrical system and the license plate.