The Siebel Fh 104 "Hallore" was a sleek German twin-engine transport and liaison aircraft developed in the late 1930s, renowned for its clean aerodynamic design, high-speed performance, and role as a personal courier for senior Luftwaffe officers during WWII. This collection provides the essential technical documentation for understanding this rare and historically significant aircraft.

Definitive Collection with Free Lifetime Updates: This is a living collection that we continuously expand and refine. As we acquire additional Siebel Fh 104 documentation, technical bulletins, or variant-specific materials, we update this collection and provide free lifetime updates to all purchasers. Your one-time purchase guarantees access to all future additions and improvements to this collection.

Historical Note

The Siebel Fh 104 "Hallore" was designed by Siebel Flugzeugwerke in the late 1930s as a high-speed civil transport and liaison aircraft. Featuring a low-wing cantilever monoplane configuration with an elegant elliptical wing planform, the Fh 104 combined a metal fuselage with plywood-covered wings and a hydraulic inward-retracting landing gear housed in the engine nacelles.

Powered by two Hirth HM 508D V-8 inverted air-cooled piston engines producing 280 PS (276 hp) each, the Hallore achieved impressive performance for its era: a maximum speed of 350 km/h (217 mph) at sea level, a cruise speed of 335 km/h, and a range of 920 km (572 miles). With a service ceiling of 6,600 meters and excellent stability characteristics, the aircraft became a favored personal transport for high-ranking Luftwaffe officers including Adolf Galland and Ernst Udet.

Though originally intended for civil use, the Fh 104 was primarily employed by the Luftwaffe during WWII as a fast, reliable courier aircraft. One notable example completed a 40,000 km tour around Africa in 1939, demonstrating the aircraft's long-distance capabilities and reliability. Only 46 units were produced before production shifted to the larger Siebel Si 204 in 1942, making the Fh 104 a rare and collectible subject for aviation historians and enthusiasts.

Manuals Included in This Collection

• Montage- und Betriebsanleitung Nr.104 04 - Assembly and Operating Instructions detailing assembly procedures, operational guidelines, and maintenance protocols
• Baubeschreibungen (1938) - Construction Description manual outlining building and construction standards from the initial production period
• Baubeschreibungen (1940) - Updated Construction Description manual with revised construction standards
• Betriebsstoff-Anlage Manual (1940) - Fuel System documentation focusing on fuel system design, operation, and maintenance

This collection spans the aircraft's production period from 1938 to 1940, providing comprehensive coverage of assembly, construction standards, operational procedures, and fuel system specifications for the Siebel Fh 104 "Hallore."

Engineering Norms and Standards

Design and Aerodynamics: Low-wing cantilever monoplane with elliptical wing planform, metal fuselage construction, plywood-covered wings, and hydraulic inward-retracting landing gear. Two-bladed variable-pitch propellers driven by Hirth HM 508D engines.

Performance Specifications:

• Maximum Speed: 350 km/h (217 mph) at sea level
• Cruise Speed: 335 km/h (208 mph) or 300 km/h (186 mph) depending on altitude
• Range: 920 km (572 miles)
• Service Ceiling: 6,600 m (21,650 ft)
• Rate of Climb: 6.0 m/s (1,090 ft/min); 1,000 m reached in 1 min 54s
• Landing Speed: 97 km/h (60 mph)

Dimensions and Weights:

• Wingspan: 12.06 m (39 ft 7 in)
• Length: 9.5 m (31 ft 2 in)
• Height: 2.64 m (8 ft 8 in)
• Empty Weight: 1,510 kg (3,329 lb)
• Gross Weight: 2,350 kg (5,181 lb)

Propulsion: Two Hirth HM 508D V-8 inverted air-cooled piston engines, each producing 280 PS (276 hp/210 kW), equipped with two-bladed variable-pitch propellers.

Manufacturing Standards: German aviation engineering standards of the late 1930s and early 1940s, with construction documentation following Luftfahrtgeräteliste (LGL) specifications and Siebel Flugzeugwerke internal engineering practices.

Video: The Special Birth of the Siebel Fh 104

Format and Delivery

Instant Digital Download: Upon purchase, you will receive immediate access to download all manuals in this collection as high-quality PDF files. These documents are optimized for both screen viewing and printing, with clear scans preserving all technical diagrams, specifications, and German-language text.

File Organization: All manuals are organized in clearly labeled folders by document type and date, making it easy to locate specific technical information.

Compatibility: PDF files are compatible with all modern devices including Windows, Mac, iOS, and Android platforms.

Disclaimer

These manuals are provided for historical reference, research, and educational purposes only. They represent the original factory documentation from the 1930s and 1940s and should not be used as the sole basis for any restoration, maintenance, or airworthiness decisions. Always consult current aviation authorities, certified engineers, and appropriate regulatory bodies for any aircraft-related work.

This digital compilation, structure, indexing, and presentation are © Sicuro Publishing. Original factory manuals are historical documents in the public domain.