Schleicher ASW 19

Schleicher ASW 19
Type:	Glider
Design country:	BR Germany
Manufacturer:	Alexander Schleicher
First flight:	November 23, 1975
Production time:	1975-1986
Number of pieces:	425

The Schleicher ASW 19 is a glider the manufacturer Alexander Schleicher GmbH & Co .

The ASW 19 was designed in 1975 by Gerhard Waibel as a successor to the ASW 15 . It was developed as a performance aircraft of the FAI standard class . By 1986, 425 copies were made by Alexander Schleicher in Poppenhausen . The main focus of the design was the aerodynamically significantly improved fuselage, which tapered to a point in the cockpit area, in which Waibel implemented a new double-shell safety cockpit for the first time, which has since been standard on all Schleicher aircraft.

The exterior of the wings was largely taken over from the ASW 15 . Only the wing-fuselage transition was modified, the aileron depth slightly reduced, and the airbrakes on the underside were omitted. However, the wings differ in construction; Among other things, the spar of the ASW-19 wing was made in a separate mold. Balsa wood was no longer used as a support material , but Conticell plastic foam.

The ASW 19 glider index is 100, the "Club" version is 98.

Differences to ASW 15

An ASW 19B

The ASW 19 has a newly developed fuselage with a damped T-tail , while the previous model had a cross tail with a pendulum elevator . The fuselage is significantly more aerodynamic, especially at high speeds, and thus provides a performance advantage compared to the ASW 15. Further differences to the ASW 15 with its laterally offset tow coupling and plug-in hood are the coupling, which is located centrally in front of the wheel in the landing gear shaft, and the canopy that can be folded forward . In the early versions of the ASW 19, the instrument panel was still firmly mounted in the fuselage. In order to improve boarding and especially the emergency exit options, the instrument panel was later connected to the hood as a folding mushroom. This option has been retrofitted to many ASW 19s.

The ASW 19 has a shell-type GRP fuselage without balsa wood or honeycomb tubes as support material. In this design, too, significant progress has been made compared to the ASW 15. However, the many changes led to a very high curb weight, which is often over 260 kg.

technology

To improve the properties in aircraft tow, many ASW 19s are equipped with a second coupling on the underside of the fuselage a little in front of the control stick. The airbrakes of the first ASW 19 were still single-story. To optimize the landing properties, the improved version ASW 19B, which was manufactured from 1978 onwards, has double-decker flaps which enable steeper approaches to short landing fields. These two options were also retrofitted to numerous ASW 19s later. One disadvantage of the many possible modifications is the reduction in the maximum payload in the cockpit. With many ASW 19s this is less than 100 kg. A 19 with a nose coupling, folding instrument panel, double-decker flaps, water ballast system and flight data computer can weigh between 260 and 280 kg, which is 20 to 40 kg more than the typical weight of some other club-class aircraft.

A single ASW 19 was modified to the ASW 19X. The wing was given a new profile with a blowout at the TU Delft, which led to a significant increase in performance comparable to the LS4 .

Competitions

In 1978 the Dutchman Baer Selen won the title of glider world champion in the standard class with an ASW 19. After the appearance of at Schneider made LS4 and the by Schempp-Hirth produced Discus the ASW was rarely represented in 19 international competitions on the front seats. Gerhard Waibel therefore developed the successor model, the ASW 24, with a completely new design including a safety cockpit with an energy-absorbing crumple zone and a stiffened cockpit area.

ASW 19 today

Instrument panel of a modernly equipped ASW 19 with central PDA navigation and Flarm collision warning device

Today the ASW 19 and ASW 19B are very popular FAI club class gliders . In this class, aircraft are rated below a performance index of currently 107, which are no longer aerodynamically competitive in the current FAI standard class. Due to the harmonious flight characteristics and the good flight performance, a neat ASW 19 is usually worth more on the used market today than the competition models Glaser-Dirks DG-100 and LS-1 . Other popular club class aircraft are, for example, Standard Cirrus or Standard and Club Libelle .

Technical specifications

Parameter	Data
class	FAI standard class (today: FAI club class)
Construction year	1975-1986
number of pieces	425
constructor	Gerhard Waibel
span	15 m
Wing area	11.00 m²
Wing extension	20.45
Hull length	6.82 m (ASW 19B: 6.48 m)
Wing profile	Wortmann FX 61-163, FX 60-126
Empty mass	approx. 260 kg
Water ballast	80 kg (ASW 19B: 100 kg)
Max. Take-off mass	408 kg (ASW 19B: 454 kg)
Wing loading	30–37 kg / m² (ASW 19B: up to 41 kg / m²)
Top speed	255 km / h
Minimum speed	67 km / h
slightest sinking	0.62 ms −1 with a wing load of 30 kgm −2 and 72 km / h 0.73 ms −1 with a wing load of 41.3 kgm −2 and 90 km / h
best gliding	approx. 38.5 at 95 km / h (without ballast) approx. 38.5 at 112 km / h (with ballast)
Largest load multiple at 170 km / h	+5.3 to −2.65 g
Largest load multiple at 255 km / h	+4.0 to −1.5 g

See also

• List of aircraft types

Web links

Commons : ASW 19  - collection of pictures, videos and audio files

• Alexander Schleicher glider construction

Individual evidence

1. ↑ Alexander Schleicher: All types of aircraft since 1951 , accessed on December 18, 2018.
2. ^ Georg Brütting : The most famous gliders . 1st edition. Motorbuch Verlag special, Stuttgart 2003, ISBN 3-613-02296-6 , p. 121 .