Max range of the Supermarine Stranraer

[Admiral Beez]

Per Wikipedia…

The Supermarine Stranraer had: “two petrol tanks, each of 250 imperial gallons (1,100 L; 300 US gal) capacity, were placed in the centre section of the top plane; Range: 1,000 mi (1,600 km, 870 nmi) at 105 mph (91 kn; 169 km/h) and 5,000 ft (1,500 m). Aircraft assigned to North Sea patrols were typically armed with bombs underneath one wing and a single overload fuel tank underneath the other one.“

There are photos showing two additional fuel tanks beneath the wings. I can’t find any reference to the size of these tanks nor the extended range they provided. Can anyone let me know?

 

[Geoffrey Sinclair]

Overload = Normal service load and maximum fuel
Performance Tables of British Service Aircraft, Air Publication 1746, dated August 1939 but data includes 1940/41 aircraft
In these tables the ranges of all aircraft except fighter types are calculated after deducting fuel used in 50 minutes at maximum economic power
a) 20 minutes at maximum economic cruising power, to allow for warming of engines, taxying, taking off and the climb to operational height
b) 30 minutes at maximum economic cruising power, to allow for time over target, navigational errors and other emergencies

Maker	Note fuel weights may be for different octane ratings	Supermarine
Name	Fighters 15 minutes fuel allowance, others 50 minutes.	Stranraer
Type	General Reconnaissance	GR
Engine	Number	2​
Engine	Make	Pegasus X
Engine	Cooling	Air
Power	Horse Power	915​
Power	At Height (feet)	6,250​
Size	Span (feet, inches)	85'
Size	Length (feet, inches)	54.6'
Size	Height (feet, inches)	25.9'
Size	Wing Area (square feet)	1,457​
Men	Crew	6​
Armament	Forward Fuselage	1 Lewis
Armament	Dorsal	1 Lewis
Armament	Tail	1 Lewis
Armament	Rounds Per Machine Gun	5 Magazines.
Bomb Load	Normal (pounds)	500​
Bomb Load	Maximum (pounds)	1,100​
Weight	Tare (pounds)	13,179​
Normal	Weight (pounds)	19,559​
Normal	Take Off (Over 50 ft) (Yards) (Or Unstick time)	440 yds/24 secs
Normal	Climb to Height (feet)	5,000​
Normal	Climb to Height Time (Mins)	4.6​
Normal	Service Ceiling (Feet)	20,000​
Normal	Maximum Speed (m.p.h)	161​
Normal	Max Speed Height (Feet)	5,000​
Normal	Cruising Speed (m.p.h)	137​
Normal	Cruise Speed Height	5,000​
Normal	Bomb Load (pounds)	500​
Normal	50 Minutes allowance Range (miles)	815​
Normal	50 Minutes allowance Endurance Hours	6​
Normal	Fuel (for range, pounds)	3,195​
Normal	Fuel (for allowance, pounds)	480​
Normal	Fuel (Total, pounds)	3,675​
Normal	Fuel (Total, Gallons)	490​
Normal	Miles per 100 pounds fuel	25.8​
Extended	Overload Weight (pounds) (Max bombs (or Fuel if same))	22,739​
Extended	Take Off (Over 50 ft) (Yards) (Or Unstick time)	500 yds/44 secs
Extended	Climb to Height (feet)	5,000​
Extended	Climb to Height Time (mins)	6​
Extended	Service Ceiling	17,500​
Extended	Maximum Bombs (Cruise) Speed (m.p.h)	132​
Extended	Maximum Bombs (Cruise) Height (feet)	5,000​
Extended	Maximum Bombs (Cruise) Bomb Load (pounds)	1,100​
Extended	Maximum Bombs (Cruise) Range (50 mins allow.) (miles)	1,325​
Extended	Maximum Bombs (Cruise) Endurance (50 mins allow.) Hrs	9.95​
Extended	Maximum Bombs (Cruise) Fuel (for range, pounds)	5,300​
Extended	Maximum Bombs (Cruise) Fuel (for allowance, pounds)	480​
Extended	Maximum Bombs (Cruise) Fuel (Total, pounds)	5,780​
Extended	Maximum Bombs (Cruise) Fuel (Total, Gallons)	770​
Extended	Maximum Bombs (Cruise) Miles per 100 pounds of fuel	24.8​
Extended	Maximum Fuel (Cruise) Speed (m.p.h)	132​
Extended	Maximum Fuel (Cruise) Height (feet)	5,000​
Extended	Maximum Fuel (Cruise) Bomb Load (pounds)	500​
Extended	Maximum Fuel (Cruise) Range (50 mins allow.) (miles)	1,465​
Extended	Maximum Fuel (Cruise) Endurance (50 mins allow.) Hrs	11.1​
Extended	Maximum Fuel (Cruise) Fuel (for range, pounds)	5,900​
Extended	Maximum Fuel (Cruise) Fuel (for allowance, pounds)	480​
Extended	Maximum Fuel (Cruise) Fuel (Total, pounds)	6,380​
Extended	Maximum Fuel (Cruise) Fuel (Total, Gallons)	850​
Extended	Maximum Fuel (Cruise) Miles per 100 pounds of fuel	24.8​
Extended	Maximum Fuel Capacity (Gallons)	850​
Extended	Maximum Fuel (Economical) Speed (m.p.h)	103​
Extended	Maximum Fuel (Economical) Height (feet)	5,000​
Extended	Maximum Fuel (Economical) Bomb Load (pounds)	500​
Extended	Maximum Fuel (Economical) Range (50 mins allow.) (miles)	1,615​
Extended	Maximum Fuel (Economical) Endurance (50 mins allow.) Hrs	15.7​
Extended	Maximum Fuel (Economical) Fuel (for range, pounds)	5,900​
Extended	Maximum Fuel (Economical) Fuel (for allowance, pounds)	480​
Extended	Maximum Fuel (Economical) Fuel (Total, pounds)	6,380​
Extended	Maximum Fuel (Economical) Fuel (Total, Gallons)	850​
Extended	Maximum Fuel (Economical) Miles per 100 pounds of fuel	27.4​

 

[JDCAVE]

This aircraft was used for patrols out of RCAF Base, Bella Bella British Columbia.

https://www.101nisquadron.org/wwii-rcaf-bases/the-story-of-rcaf-bella-bella/

The “Base” is now called Shearwater, and is a port of call for many recreational boater (including myself) during the summer months. The original hanger is still in place and is now used for the marine services available in Shearwater.

Of interest are the islands and passages in the nearby “Hakai Pass” area that are named after WWII aircraft:

Jim

 

[macharvard]

This aircraft was used for patrols out of RCAF Base, Bella Bella British Columbia.

https://www.101nisquadron.org/wwii-rcaf-bases/the-story-of-rcaf-bella-bella/

The “Base” is now called Shearwater, and is a port of call for many recreational boater (including myself) during the summer months. The original hanger is still in place and is now used for the marine services available in Shearwater.

Of interest are the islands and passages in the nearby “Hakai Pass” area that are named after WWII aircraft:

View attachment 737682View attachment 737683

Jim

Okay. I admit I am old and easily confused, in this case by the following:
"This aircraft was used for patrols out of RCAF Base, Bella Bella British Columbia.........The "Base" is now called Shearwater..."
The last time i was at Shearwater, it was in Nova Scotia, several thousand kilometres east of Bella Bella. What am I missing?

 

[JDCAVE]

Okay. I admit I am old and easily confused, in this case by the following:
"This aircraft was used for patrols out of RCAF Base, Bella Bella British Columbia.........The "Base" is now called Shearwater..."
The last time i was at Shearwater, it was in Nova Scotia, several thousand kilometres east of Bella Bella. What am I missing?

There’s a “Shearwater” in British Columbia too. Trust me I’ve been there! it’s very small. A small general store, laundromat, gift stores, marina and marine services, fuel services, guided fishing trips.

Edit: The “business“ which was basically the entire community was sold the the Heiltsuk First Nation several years ago.

Shearwater Resort | Indigenous Wilderness Resort

Shearwater Resort is an Indigenous wilderness resort in the heart of the Great Bear Rainforest. Owned and operated by Heiltsuk Nation.

shearwater.ca

 

[SaparotRob]

Okay. I admit I am old and easily confused, in this case by the following:
"This aircraft was used for patrols out of RCAF Base, Bella Bella British Columbia.........The "Base" is now called Shearwater..."
The last time i was at Shearwater, it was in Nova Scotia, several thousand kilometres east of Bella Bella. What am I missing?

GPS?

 

[Frog]

There must have been some Frenchman on the drawing board.

 

[bf109xxl]

 

[Admiral Beez]

View attachment 737764

Thanks. That tailgunner position has to feel cold, exposed and lonely. Was the tailgunner accessible from the crew compartment?

 

[Admiral Beez]

I was thinking about where one could fly to on max fuel but otherwise light loaded, with six to eight people aboard if escaping from the coming Japanese.

Below are the points of origin options with 1,600 mile range:
Hong Kong
RAF Glugor Seaplane Base, Penang
Singapore
RAF Kuching, Sarawak

Draw a circle with a radius on a map

www.mapdevelopers.com

Hong Kong seems the worst option.