Aircraft Reports - Aircraft Manuals Data and Publications

09/11/2026

Online Aviation Library

09/07/2026

Online Aviation Library by Sicuro Publishing

Convair XFY-1 Pogo & Lockheed XFV-1 | Flight Test

Discover the story of the Convair XFY-1 Pogo and Lockheed XFV-1, tw...

09/05/2026

Online Aviation Library

The Lippisch P.15 'Diana': Germany's
Frankenstein Jet Interceptor

An In-Depth Technical Development and Historical Blog Profile

In the final agonizing months of World War II, N**i Germany's aviation industry was in a state of utter chaos.
Under relentless Allied strategic bombing, regular aircraft production lines were shattered, supply chains were
virtually non-existent, and critical materials like aluminum and high-grade alloys were scarcer than ever. Yet,
out of this desperation emerged the Emergency Fighter Program (Jägernotprogramm), a final, radical
initiative aimed at producing cheap, high-performance jet interceptors capable of breaking the Allied bomber
fleets. It was during this twilight period, in March 1945, that the legendary aerodynamicist Dr. Alexander
Lippisch and Colonel Knemeyer conceived the Lippisch P.15, also known as the Diana.

The 'Frankenstein' Production Strategy

The most remarkable aspect of the Lippisch P.15 was not its futuristic aerodynamic profile, but its cynical,
brilliant industrial adaptation. Knowing that there was no time or resource available to design, tool, and test
completely new airframe components, Lippisch designed the P.15 as a composite vehicle—a technical
Frankenstein's monster cobbled together from aircraft already rolling off existing assembly lines:

• Wings and Tail Structure: Borrowed directly from the rocket-powered Messerschmitt Me 163C Komet.
Because the central fuselage section designed by Lippisch was wider than the original rocket body, the
overall wingspan was slightly extended, altering the roll rates and total lifting surface area favorably.
• Nose and Forward Fuselage: Adapted from the Heinkel He 162 Volksjäger. This allowed the cockpit
layout, instrumentation, and canopy glass molding tools to be utilized instantly without redesigning pilot
survivability components.
• Landing Gear System: Retractable undercarriage salvaged from the mass-produced Messerschmitt Bf
109. This was a massive operational upgrade from the dangerous, unguided landing skids used by the Me
163, enabling the P.15 to utilize conventional tarmac runways.
Aerodynamics, Air Intakes, and Propulsion

Dr. Lippisch was a pioneer of delta-wing and tailless aviation. The P.15 embodied his vision, featuring a highly
streamlined, tailless swept-wing planform. Unlike the volatile Walther rocket motor powering the Komet, the

P.15 was designed around a conventional, albeit highly advanced air-breathing powerplant: the Heinkel HeS
011A turbojet engine. The engine was deeply buried inside the rear central fuselage to maintain a clean
aerodynamic form.
To feed oxygen to the hidden turbojet, Lippisch engineered two sharp, triangular air intakes blended seamlessly
into the wing roots. This design minimized parasite drag while providing a direct boundary-layer airflow straight
into the compressor stage of the HeS 011 engine.


Projected Technical Data & Performance Specifications

Parameter Estimated Value / Specification
Aircraft Classification Single-seat Jet Interceptor Fighter
Powerplant Options 1x Heinkel HeS 011A Turbojet (1,300 kg / 2,866 lbs thrust)
Planned Wingspan 10.08 meters (33 ft 1 in)
Fuselage Length 6.40 meters (21 ft)
Heavy Nose Armament 2x 30mm MK 108 Autocannons (Nose capsule)
Heavy Wing Armament 2x 30mm MK 108 Autocannons (Wing roots)
Estimated Top Speed Approx. 950–1,000 km/h (590–621 mph)

Historical Fate: A Final 'Paper Project'

The final blueprints for the Lippisch P.15 'Diana' were finalized between April and May of 1945, right as the
Soviet Red Army breached Berlin and American forces overran industrial centers in central Germany. Though
high commands had tentatively ordered prototype construction from the Wesserflug company, the collapsing
regime ran out of time. No structural components were ever cut, and no mock-ups were constructed. The
aircraft remained entirely on paper—a quintessential entry in the speculative 'Luft '46' aviation genre.

Following the war, Dr. Lippisch's extensive data on tailless swept wings was captured by the United States
under Operation Paperclip. His innovative design principles heavily influenced the development of early
American delta-wing aircraft, most notably the Convair XF-92, leading eventually to the deployment of the
supersonic F-102 Delta Dagger and F-106 Delta Dart.

09/03/2026

Clerget-Blin Rotary Engine Documentation

A curated digital reference collection covering the Clerget-Blin rotary aviation engines, with particular emphasis on the 9B and 9BF, early 110 HP Clerget material, illustrated parts information and associated Sopwith airframe rigging notes. It is intended for aviation historians, restorers, museum teams, engineers and researchers studying the technology and operation of First World War rotary engines.

This is a structured archival collection built from the supplied historical scans. The collection may be expanded when additional verified Clerget-Blin records are identified, while the documents listed below define the present working scope.
Historical and design note

The Société Clerget-Blin et Cie of Levallois-Perret, France, developed its rotary engine range from Pierre Clerget’s earlier stationary, automotive and water-cooled aviation-engine experiments. The first rotary designs appeared in 1913, with major military variants entering service during the First World War. Clerget engines were also produced under licence in the United Kingdom, including by Gwynnes Ltd. and Ruston, Proctor & Co. Production is generally placed in the period 1913–1920, when the company entered liquidation.

Primary wartime applications associated with the range include the Sopwith Camel F.1, Sopwith Triplane, Sopwith 1½ Strutter, Avro 504 variants and Nieuport 12/17bis. After the war, surplus engines and airframes continued in limited civil, training, recreational and early rotorcraft contexts. Surviving engines today are principally associated with museums, restorations and carefully controlled heritage flying.
Technical reference: Clerget 9B and 9BF

Type: air-cooled rotary engine, with the crankcase and cylinders rotating around a stationary crankshaft.
Configuration: nine-cylinder, single-row radial arrangement.
Clerget 9B: approximately 130 HP, 120 mm bore and 160 mm stroke, about 16.29 litres displacement.
Clerget 9BF: approximately 150 HP, with the longer 172 mm stroke and about 17.5 litres displacement.
Compression ratio: 4.56:1 in the supplied technical overview.
Fuel and lubrication: early aviation petrol with total-loss lubrication using castor oil.
Engineering features: independent intake and exhaust valves, separate pushrods, a segment-gear cam assembly and a brass obturator ring below the piston crown to accommodate thermal expansion.

The supplied 1917 9B/9BF cover page states a speed of 1,250 RPM and a weight of 181 kg (400 lb) including the oil pump, air pump and two magnetos. Historical sources may use different weight bases, so figures should be read against their individual source documents.
Documents in the present collection

Clerget Patent Aero Engines 9B—130 Horse / 9BF—150 Horse, 1917, technical reference.
Illustrated List of Parts with Code-Words for Clerget 9B & 9BF Patent Aero Engines, illustrated parts list.
Royal Air Force Technical Notes (Series I), 110 H.P. Clerget, technical note; date not stated on the supplied cover.
Moteurs Clerget-Blin—Levallois-Perret, French reference volume; the supplied cover does not establish a complete edition record.
Sopwith Biplane F.1 130 H.P. Clerget Rigging Notes, Part # BSSOPWITHBIPLANE RNC, circa 1917–1918, service/airframe setup manual.
Sopwith 1½ Strutter 110 H.P. Clerget Rigging Notes, Part # BSSOPWITH11/2 RIGG C, circa 1916–1917, service/airframe setup manual.

Format and delivery

Digital PDF access is delivered electronically after purchase. Files are supplied as compressed RAR/ZIP archives where applicable. On Windows, use WinRAR or 7-Zip; on Mac, use The Unarchiver or a comparable extractor. After extraction, the documents open as standard PDFs for searching, reading and printing.
Regulatory and archival notice

This collection contains historical engine, parts and airframe setup material. It is supplied for historical reference, research, simulation, museum and restoration study, and is not current approved airworthiness data, a maintenance release, a repair instruction or an alternative to current data from the applicable authority or Type Certificate holder. The original Clerget-Blin manufacturing company is no longer operating, and no current Type Certificate holder is identified in the supplied records.

Legal Notice: This digital compilation, structure, indexing and presentation are © Sicuro Publishing. Underlying historical documents remain subject to their own copyright, provenance and distribution status. No endorsement by Clerget-Blin, the RAF, Sopwith, any aircraft manufacturer or any museum is implied.

Export Notice: Buyers are responsible for complying with applicable export-control, import and destination-country rules. Historical age alone does not determine reproduction or distribution rights.

08/31/2026

Online Aviation LibraryThe Fieseler Fi 103R Reichenberg was a late-World War II German manned version of the V-1 flying bomb developed in 1944. It was designed for highly dangerous, near-suicidal missions to precisely strike high-value Allied targets. Despite approximately 175 units being built, the program was cancelled before ever flying an operational combat mission.Design and The Escape RealityThe Reichenberg modified the standard, autonomous V-1 "Buzz Bomb" cruise missile. Technicians carved out a tiny cockpit inside the fuselage right in front of the pulsejet engine intake. It contained basic flight indicators, a control stick, and a single plywood bucket seat.Officially, the pilot was expected to guide the missile, jettison the canopy, and parachute away just before impact. In reality, the cockpit canopy opened directly in front of the high-velocity pulsejet air intake. Surviving an escape at 450 mph was practically impossible, and actual survival odds were estimated at less than 1%.Operations and TestingUnlike standard V-1s launched from ground ramps, the Fi 103R was configured to be air-dropped from a Heinkel He 111 bomber. Volunteers from the Luftwaffe's special operations unit, Kampfgeschwader 200 (KG 200), signed a declaration explicitly recognizing that their service would result in death.Early test gliders frequently crashed due to severe control defects. Famous German test pilot Hanna Reitsch flew the dangerous prototype repeatedly, diagnosing that the aircraft possessed an unmanageable stall speed that led to instant loss of lift.Why Was it Cancelled?In October 1944, command of KG 200 transferred to Oberstleutnant Werner Baumbach. Outraged by the waste of vital resources and backed by Albert Speer, Baumbach convinced Adolf Hi**er that human-guided su***de weapons contradicted German military traditions. The program was quietly abandoned, ensuring the Reichenberg never saw combat.Technical Specifications ComparisonStandard V-1 Flying Bomb (Fi 103):Crew: None (Gyroscopic Autopilot)Powerplant: 1 x Argus As 014 PulsejetTop Speed: ~400 mph (640 km/h)Warhead Weight: 1,870 lbs (850 kg)Operational Use: Over 10,000 fired at Allied territoryManned Reichenberg (Fi 103R-IV):Crew: 1 PilotPowerplant: 1 x Argus As 014 PulsejetTop Speed: ~450 mph (724 km/h)Warhead Weight: ~1,900 lbs (850-900 kg)Operational Use: 0 (Never used in combat)

08/15/2026

Online Aviation Library

"You can't own everything — but knowing where everything is, and owning the right things, is what creates real knowledge."

08/15/2026

Online Aviation Library

Lippisch DM 1 The Strange Glider

08/08/2026

Online Aviation Library

The Coal Powered Interceptor, Lippisch P 13a

08/08/2026

About Online Aviation Library

Online Aviation Library is a data publisher — not a regulatory authority, government institution, or official distributor. Our mission is to collect, structure, preserve, and publish surviving original aviation documentation. We operate on three principles: Preservation before reconstruction. Authenticity before completeness. Original evidence before modern interpretation. We don't teach; we tell stories.

08/05/2026

The Bréguet Br.1050 Alizé (French for "Tradewind") was a French carrier-based anti-submarine warfare (ASW) and maritime patrol aircraft developed by Breguet Aviation in the 1950s. Highly reliable and characteristically portly to house its bulky electronics, it served as a primary workhorse for the French Navy (Aéronavale) and the Indian Navy for over four decades.