×
Aircraft / Aviation Vehicles & Artillery Small Arms Warships & Submarines Military Ranks Military Pay Scale (2024) Special Forces

Hafeli DH-1


Twin-Boom Reconnaissance Biplane


Switzerland | 1916



"The Hafeli DH-1 was the beginning of a line of reconnaissance-minded aerial platforms for the Swiss Air Force appearing during World War 1."

Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Hafeli DH-1 Twin-Boom Reconnaissance Biplane.
1 x Argus As II 6-cylinder, water-cooled inline piston engine developing 120 horsepower driving two-bladed wooden propeller in pusher arrangement.
Propulsion
78 mph
125 kph | 67 kts
Max Speed
32,283 ft
9,840 m | 6 miles
Service Ceiling
155 miles
250 km | 135 nm
Operational Range
Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the Hafeli DH-1 Twin-Boom Reconnaissance Biplane.
2
(MANNED)
Crew
28.9 ft
8.82 m
O/A Length
42.0 ft
(12.80 m)
O/A Width
9.8 ft
(3.00 m)
O/A Height
1,653 lb
(750 kg)
Empty Weight
2,480 lb
(1,125 kg)
MTOW
Armament
Available supported armament and special-mission equipment featured in the design of the Hafeli DH-1 Twin-Boom Reconnaissance Biplane .
1 x 7.45mm machine gun on trainable mounting in forward cockpit (managed by the observer).
Variants
Notable series variants as part of the Hafeli DH-1 family line.


Authored By: Staff Writer | Last Edited: 09/13/2021 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.

Swiss aeronautical engineer August Hafeli helped the German aero-concern of AGO Flugzeugwerke realize their C.I and C.II reconnaissance-minded biplanes in 1915 as World War 1 (1914-1918) raged across Europe. That same year, Eidgenoessische Konstruktionswerkstaette (K+W) was established in Switzerland and Hafeli was hired on to complete a similar project for the Swiss Air Force - beginning with the twin-boom "DH-1". This aircraft then spawned a series of similar designs for the country that included the DH-2 of 1916, DH-3 of 1917, and DH-4 of 1918 - these featuring a more conventional in-line design arrangement.

The DH-1 biplane would have reconnaissance as its central role and utilize a proven over-under biplane wing arrangement featuring three bays. Wood and fabric were used throughout its construction. The crewspace involved open-air cockpits seated along a centralized nacelle with booms stretching rearwards with each component capped by a small-area, rounded rudder plane. The booms were joined by a shared horizontal plane. The twin-wheeled undercarriage was fixed under the center mass with a basic skid added to the tail section for ground-running. The engine was installed at the aft-end of the fuselage component, completing the design arrangement of this aircraft. It carried a single machine gun of 7.45mm caliber for self-defense.

By and large, the DH-1 was similar in both form and function to Hafeli's earlier designs for AGO - highly conventional and no-nonsense.

The aircraft was powered by a single Argus As II series 6-xylinder, inline liquid-cooled piston engine outputting 120 horsepower and used to spin a two-bladed (fixed-pitch) wooden propeller. This powerplant was locally-built under license by Buhler Brothers Ltd. Since its placement was at the rear of the fuselage nacelle, the propeller arranged in a "pusher" configuration - this cleared the frontal vision and firing arcs of the aircraft for the observation crew.

Dimensions of the biplane included a running length of 28.10 feet, a wingspan of 42 feet, and a height of 9.9 feet. Performance included a maximum speed of 78 miles-per-hour, a range out to 160 miles, and a service ceiling of 32,280 feet.

Following a first-flight of the prototype, series introduction followed as soon as 1916 and the aircraft was in active use until 1919 with the Swiss Air Force. Only six were produced in all and no examples were exported. The survivors were eventually scrapped.

Content ©MilitaryFactory.com; No Reproduction Permitted.
Operators
Global customers who have evaluated and/or operated the Hafeli DH-1. Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 6 Units

Contractor(s): Eidgenossische Konstruktionswerkstaette (K+W) / Hafeli - Swtizerland
National flag of Switzerland

[ Switzerland ]
1 / 1
Image of the Hafeli DH-1
Image from the Swiss Federal Archives; Public Domain.

Similar
Developments of similar form-and-function, or related, to the Hafeli DH-1.
Going Further...
The Hafeli DH-1 Twin-Boom Reconnaissance Biplane appears in the following collections:
HOME
AVIATION INDEX
AIRCRAFT BY COUNTRY
AIRCRAFT MANUFACTURERS
COMPARE AIRCRAFT
AIRCRAFT BY CONFLICT
AIRCRAFT BY TYPE
AIRCRAFT BY DECADE
WWI AIRCRAFT
Disclaimer | Privacy Policy | Cookies

2024 Military Pay Scale Military Ranks of the World U.S. Department of Defense Dictionary Conversion Calculators Military Alphabet Code Military Map Symbols Breakdown U.S. 5-Star Generals List WWII Weapons by Country

The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com. No A.I. was used in the generation of this content.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world, WDMMA.org (World Directory of Modern Military Aircraft), WDMMW.org (World Directory of Modern Military Warships), SR71blackbird.org, detailing the history of the world's most iconic spyplane, and MilitaryRibbons.info, cataloguing military medals and ribbons. Special Interest: RailRoad Junction, the locomotive encyclopedia.


©2024 www.MilitaryFactory.com • All Rights Reserved • Content ©2003-2024 (21yrs)