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Stinson Reliant


Lightweight Liaison Aircraft


United States | 1933



"The high-wing monplane Stinson Reliant series soldiered on before, through and after World War 2 in service with several notable operators."



Authored By: Staff Writer | Last Edited: 04/15/2020 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.
The Stinson Reliant was a product of the pre-World War 2 (1939-1945) period and used in the liaison and training roles. It carried a shoulder-mounted monoplane form giving it excellent lift, low-altitude handling, and short-field capabilities. 1,327 of the type were produced in a myriad of variants and these went on to serve a large collection of global operators ranging from Argentina and Australia to Paraguay and the United States.

The Stinson Aircraft Company was founded after the fighting of World War 1 (1914-1918) in 1920 and managed an existence until after World War 2 in 1948. Based out of Detroit, Michigan, the company excelled at the lightweight plane concept with many of its creations seen sporting shoulder-mounted wing mainplanes. The company's first major contribution was the SB-1 "Detroiter" - a single-engine cabin biplane - of which twenty-six examples were from 1926 on (ultimately more than 100 aircraft were built under the Detroiter name).

Production of the Reliant occurred in the pre-war years beginning in 1931 and ended when the war was in full swing in 1943. While many early types were conditioned for civilian use, the first dedicated military forms were finally introduced in February of 1942 when the United States war machine required aircraft of all types for the effort. Both the British and the Americans relied on the lightweight aircraft to survey battlefields, conduct reconnaissance runs, communications, and ferrying passengers to and fro. For the latter party, the aircraft was designated as UC-81 and AT-19 marking utility and trainer roles, respectively. Several aircraft mimicking the form and function of the Reliant were utilized by the United States and other military powers of the wartime period.

Variants of the Reliant proved plenty and, therefore, the aircraft could be pressed into a variety of roles including general cargo hauling, air ambulance, photographic scouting, firefighting, and target towing. The civilian market line began with the SR Reliant and this form carried the Lycoming R-680 radial piston engine of 215 horsepower. This was followed by the SR-1 with its Lycoming R-680-2 engine of 240 horsepower - two were built. From this beginning arrived other marks ranging from SR-3 to the SR-10K, the latter powered through a Wright R-760E-3 engine - eleven of this mark were produced in all.

The SR-10F production form carried a crew of one and up to four passengers. Dimensions included a running length of 27.10 feet, a wingspan of 41.6 feet, and a height of 8.5 feet. Empty weight was 3,045lb against a Maximum Take-Off Weight (MTOW) of 4,605lb. Power was from a single Pratt & Whitney "Wasp Junior" SB 9-cylinder, air-cooled radial piston engine developing 400 horsepower and driving a two-bladed propeller unit at the nose. With this configuration, the aircraft could manage a cruising speed near 177 miles-per-hour, a range out to 850 miles, and a service ceiling up to 21,000 feet. Rate-of-climb was 1,330 feet-per-minute.

Military marks began with the AT-19 designated by the United States Army Air Forces (USAAF) and operated by the British Royal Navy through Lend-Lease as the "Reliant I" - 500 examples being produced. Fifty-one AT-19s were converted for the photographic surveying role as the AT-19C. Utility marks began with the UC-81 and ran, in order, to the UC-81N. The L-12 were a pair of SR.5A models taken into USAAF service while the L-12A were a pair of SR-7Bs. RQ-1 was used to designated a one-off SR-5 model taken on by the United States Coast Guard service in 1935 - this example was eventually redesignated as the XR3Q-1 and operated into 1941 by the United States Navy.

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Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Stinson Reliant SR-10F Lightweight Liaison Aircraft.
1 x Pratt & Whitney "Wasp Junior" SB 9-cylinder air-cooled radial piston engine driving a two-bladed propeller unit at the nose.
Propulsion
177 mph
285 kph | 154 kts
Max Speed
20,997 ft
6,400 m | 4 miles
Service Ceiling
851 miles
1,370 km | 740 nm
Operational Range
1,330 ft/min
405 m/min
Rate-of-Climb
City-to-City Ranges
Operational range when compared to distances between major cities (in KM).
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the Stinson Reliant SR-10F Lightweight Liaison Aircraft.
1
(MANNED)
Crew
27.9 ft
8.51 m
O/A Length
41.6 ft
(12.68 m)
O/A Width
8.5 ft
(2.60 m)
O/A Height
3,053 lb
(1,385 kg)
Empty Weight
4,630 lb
(2,100 kg)
MTOW
Design Balance
The three qualities reflected below are altitude, speed, and range. The more full the box, the more balanced the design.
RANGE
ALT
SPEED
Variants
Notable series variants as part of the Stinson Reliant family line.
SR-1
SR-2
SR-3
SR-4
SR-5
SR-5A
SR-5B
SR-5C
SR-5E
SR-5F
SR-6
SR-6A
SR-6B
SR-7
SR-7B
SR-7C
SR-8A
SR-8B
SR-8C
SR-8D
SR-8DM
SR-8E
SR-8DE
SR-9
SR-9A
SR-9B
SR-9C
SR-9E
SR-9F
SR-10 - Final commercial model
SR-10B
SR-10C
SR-10D
SR-10E
SR-10F
SR-10G
SR-10J
SR-10K
AT-19
AT-19A
AR-19B
AT-19C
UC-81
UC-81A
UC-81C
UC-81D
XC-81D
UC-81E
UC-81F
UC-81G
UC-81H
UC-81J
UC-81K
UC-81L
UC-81M
UC-81N
L-12
L-12A
RQ-1
XR3Q-1
Reliant Mk I
V-77 - Post-war civilian model marketed by Vultee.
Operators
Global customers who have evaluated and/or operated the Stinson Reliant. Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 1,327 Units

Contractor(s): Stinson Aircraft Company - USA
National flag of Argentina National flag of Australia National flag of Brazil National flag of Mexico National flag of Norway National flag of the Philippines National flag of the United Kingdom National flag of the United States

[ Argentina; Australia; Brazil; El Salvador; Mexico; Norway; Paraguay; Philippines; United Kingdom; United States ]
Relative Max Speed
Hi: 200mph
Lo: 100mph
Aircraft Max Listed Speed (177mph).

Graph Average of 150 MPH.
Era Crossover
Pie graph section
Pie graph section
Showcasing Aircraft Era Crossover (if any)
Max Alt Visualization
Small airplane graphic
Production Comparison
1327
36183
44000
Entry compared against Ilyushin IL-2 (military) and Cessna 172 (civilian) total production.
MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030
Aviation Timeline
EarlyYrs
WWI
Interwar
WWII
ColdWar
Postwar
Modern
Future
1 / 1
Image of the Stinson Reliant

Mission Roles
Some designs are single-minded in their approach while others offer a more versatile solution to airborne requirements.
RECONNAISSANCE
TRAINING
Recognition
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Going Further...
The Stinson Reliant Lightweight Liaison Aircraft appears in the following collections:
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