Avo 68
Avo 68 Samburo | |
---|---|
Type: | Touring motor sailer |
Design country: | |
Manufacturer: |
Alpla , |
First flight: |
1975 |
The Avo 68 "Samburo" is a two-seater touring motor glider that was originally manufactured in Austria by the Alpla company .
history
The “Samburo” motor sailer project was launched by Helmuth Lehner in the mid-1970s. Together with the designer Werner Vogel, who was in charge of the technical management of the project, the Samburo touring motor glider was developed at Alpla. A total of 29 Samburo had been built by 1979; after that the production was stopped. The construction plans were taken over in the mid-1990s by the “Luftfahrttechnischen Betrieb Gerhard Nitsche” in Unterwössen . This operated the further development of the tow motor glider in order to enable inexpensive towing of gliders . In addition to the widening of the hull to improve comfort in the cockpit, a changeover of the drive on the 80 HP paid carried Rotax 912 A . This engine, with its quieter water cooling and dual ignition to improve operational safety, was the first choice for aircraft towing.
After 1996 the LTB Nitsche was taken over by the "Aircraft Phillipp GmbH". At the beginning of 1998, the Samburo, which is now powered by a Rotax engine, was the first German motor glider in Germany to be approved for towing gliders by the Federal Aviation Office .
In 2004 all rights to the Samburo were taken over by "M&D Flugzeugbau GmbH & Co. KG" in Marx ( Wittmund district ). Before the resumption of production, the overall concept of the motor glider was revised again, with more modern materials developed in the meantime being incorporated into the construction. In 2006, production of the new prototype began, which had its maiden flight on January 25, 2008. The first Samburo manufactured in Marx with the aircraft registration D-KMUD was delivered to the Air Sports Association Waterkant-Zetel on May 20, 2008. The Samburo is currently available in two versions: Samburo Basic with 100 HP and Samburo Plus with 115 HP engine and C-VFR equipment.
construction
The Samburo is manufactured in a composite construction, the fuselage consists of covered steel tubing, the wings and tail unit are wooden constructions, and in the latest version CFRP parts are also used. The original version of the Avo was similar to the disc SF 25 Falken, the landing gear had a main wheel with an integrated drum brake, a tail wheel coupled to the rudder control and two support wheels attached to the center of the wing. During the revision, the undercarriage was exchanged for a bipod undercarriage which, in combination with the hydraulic single wheel brakes, enables significantly improved ground handling. In contrast to the Falcon, the cockpit is entered via the wings.
The engines of the original version were within what was available at the time between 45 and 68 hp, each based on VW boxer engines. Later cm 2000 a 3 - Limbach - aeroengine installed, the / developed min (80 hp) at 3400 and in combination with a Hoffmann a power of about 59 kW variable pitch (three positions: takeoff, cruise and sailing) at significantly improved Flight performance led. In the meantime, the motorization has been converted to Rotax engines with outputs between 80 and 115 hp, which, thanks to water cooling and reduction gears and in combination with a constant-speed propeller from Hoffmann, work significantly more efficiently than the air-cooled engines based on VW and therefore considerably can be operated quieter. After the maximum take-off weight has been increased to 825 kg, the Avo has a usable payload of approx. 240 kg, which allows two adults plus luggage to be transported with full tanks.
The Rotax engines give the Samburo sufficient power reserves for inexpensive towing of gliders; With the Rotax 914F, a trailer load of up to 800 kg is permitted; consumption then increases to 22 liters per hour.
Technical data Samburo Plus
Parameter | Data |
---|---|
span | 16.68 m |
Wing area | 20.7 m² |
Wing extension | 13.6 |
Wing profile | NACA 642A215 / GÖ 549 |
Hull length | 8.05 m |
Preparation mass | from 585 kg |
Maximum flight weight | 825 kg |
Wing loading (max) | 36 kg / m² |
Top speed | 215 km / h |
Minimum speed | 55 km / h |
Cruising speed | 180 km / h |
Glide ratio | 25 at 95 km / h, 27 with controllable pitch propeller |
best climb | 6.0 m / s |
Web links
- Homepage of the company M&D Flugzeugbau
- DG Flugzeugbau website with a report on the testing of the Falke and Avo in use as tow planes
- Type approval of AVO 68 - v “Samburo” - EASA-TCDS-A.252 (PDF; 136 kB)