Saunders-Roe SR.45 (Princess)

Flying Boat

United Kingdom | 1952

"The Saunders-Roe Princess flying boat became the largest all-metal flying boat aircraft to have been built - just one example was completed."

Authored By: Staff Writer | Last Edited: 05/04/2019 | Content ©www.MilitaryFactory.com

Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Saunders-Roe SR.45 Flying Boat.

4 x Bristol Coupled-Proteus 610 turboprop engines developing 5,000 horsepower each with 2 x Bristol Proteus 620 turboprop engines developing an additional 2,500 horsepower; All engines driving four-bladed propeller units.
Propulsion

379 mph
610 kph | 329 kts
Max Speed

39,370 ft
12,000 m | 7 miles
Service Ceiling

5,720 miles
9,205 km | 4,970 nm
Operational Range

1,900 ft/min
579 m/min
Rate-of-Climb

City-to-City Ranges
Operational range when compared to distances between major cities (in KM).

NYC

LON

PAR

BER

MOS

TOK

SYD

LAX

NYC

Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the Saunders-Roe SR.45 Flying Boat.

6
(MANNED)
Crew

147.6 ft
45.00 m
O/A Length

219.5 ft
(66.90 m)
O/A Width

55.7 ft
(16.99 m)
O/A Height

190,038 lb
(86,200 kg)
Empty Weight

345,023 lb
(156,500 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 Saunders-Roe SR.45 (Princess) family line.

SR.45 "Princess" - Base Series Designation.

Operators
Global customers who have evaluated and/or operated the Saunders-Roe SR.45 (Princess). Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 1 Units
Contractor(s): Saunders-Roe (SARO) - UK

[ United Kingdom ]

Relative Max Speed

Hi: 400mph

Lo: 200mph

Aircraft Max Listed Speed (379mph).

Graph Average of 300 MPH.

Era Crossover

Showcasing Aircraft Era Crossover (if any)

Max Alt Visualization

Production Comparison

1

36183

44000

Entry compared against Ilyushin IL-2 (military) and Cessna 172 (civilian) total production.

MACH Regime (Sonic)

Sub

Trans

Super

Hyper

HiHyper

ReEntry

♦

Aviation Timeline

EarlyYrs

WWI

Interwar

WWII

ColdWar

Postwar

Modern

Future

♦

Mission Roles
Some designs are single-minded in their approach while others offer a more versatile solution to airborne requirements.

TRANSPORT

COMMERCIAL AVIATION

X-PLANE

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 Saunders-Roe SR.45 (Princess) Flying Boat appears in the following collections:

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