SB2C Helldiver/A-25 Shrike was a carrier-based scout-dive bomber aircraft produced for the U.S. Navy during World War II. The prototype XSB2C-l made its first flight on December 18, 1940.
Variants and serials
XSB2C-1 – (Model 84, BuNo 1758) prototype powered by a 1700 hp (1268 kW) R-2600-8 engine, made its first flight on 18 December, 1940
SB2C-1 – (Model 84, BuNo 00001-00200) first production version for US Navy with 4 x 0.50 in (12.7 mm) wing guns and one 0.30 in (7.62 mm) dorsal gun, 200 built. First flight was on 30 June, 1942.
SB2C-1A – 410 A-25As transferred to the USMC (BuNo 75218-75588, 76780-76818).
SB2C-1C – (Model 84A) identical to the SB2C-1 except for the substitution of two 20 mm wing-mounted cannon in place of the four 12,7 mm machine-guns.SB2C-1 and hydraulically operated flaps. 778 built (BuNo 00201-00370, 01008-01208, 18192-18598).
XSB2C-2 – (Model 84C) one twin-float seaplane.
SB2C-2 – (Model 84D) planned float plane version, 350 cancelled and not built.
XSB2C-3 – (Model 84E, BuNo 00008) one SB2C-1 re-engined with a 1900 hp (1417 kW) R-2600-20.
SB2C-3 – (Model 84E) R-2600-20 engine and four-bladed propeller, 1112 built (BuNo 18599-19710).
SB2C-3E – SB2C-3 fitted with APS-4 radar.
SB2C-4 – (Model 84F) fitted with wing racks for eight 5 in (127 mm) rockets or 1000 lb (454 kg) bombs and improved by perforating the surfaces of the trailing-edge dive flaps. 1985 built (BuNo 19711-21191, 64993-65286, and 82850-83127).
SB2C-4E – fitted with APS-4 radar for night operations.
XSB2C-5 – (Model 84G, BuNo 65286) one SB2C-4 converted as prototype for SB2C-5 variant.
SB2C-5 – (Model 84G) with increased fuel capacity, frameless sliding canopy, tailhook fixed in extended position, and deletion of the ASB radar, 970 built (BuNo 83128-83751, 89120-89465).
XSB2C-6 – (Model 84H) Two SB2C-3s (18620 and 18621) fitted with 2100 hp (1566 kW) R-2600-22 engine and increased fuel capacity. XSB2C-6 had their fuselages lengthened and wingtips squared in an attempt to overcome directional stability problems.
XSBF-1 – Canadian prototype
SBF-1 – Canadian built version of the SB2C-1 (BuNo 31636-31685), 50 built by Fairchild-Canada
SBF-3 – (BuNo 31686-31835) Canadian built version of the SB2C-3, 150 built by Fairchild-Canada.
SBF-4E – (BuNo 31836-31935) Canadian built version of the SB2C-4E, 100 built by Fairchild-Canada.
SBW-1 – Canadian built version of the SB2C-1, 40 built (BuNo 21192-21231) by Canadian Car & Foundry company.
SBW-1B – Canadian built version for lend-lease to the Royal Navy as the Helldiver I, 26 aircraft built by Canadian Car & Foundry company.
SBW-3 – Canadian built version of the SB2C-3, 413 built by Canadian Car & Foundry company (BuNo 21233-21645).
SBW-4E – Canadian built version of the SB2C-4E, 270 built by Canadian Car & Foundry company (serials 21646-21741 and 60036-60209).
SBW-5 – Last Canadian built version of the SB2C-5, 86 built by the Canadian Car & Foundry company (BuNo 60210-60295).
A-25A Shrike (Model 84B)- Army version without arrester gear or folding wings and radio equipment changed. Shrike also used larger wheels and revised armour. 900 built (10 for RAAF as A69-1 – A69-10)
USAAF serials:
A-25A-1-CS 41-18774 – 41-18783
A-25A-5-CS 41-18784 – 41-18823
A-25A-10-CS 41-18824 – 41-18873 and 42-79663 – 42-79672
A-25A-15-CS 42-79673 – 42-79732
A-25A-20-CS 42-79733 – 42-79972
A-25A-25-CS 42-79973 – 42-80132
A-25A-30-CS 42-80133 – 42-80462
Helldiver Mk I (JW100- JW125) – FAA designation for 26 SBW-1Bs
Design and Structure
- Type: Two-seat dive-bomber.
- Wings:
- Configuration: Low-wing cantilever monoplane with four sections. The center panel is in two portions bolted to the fuselage, and the outer wing sections can fold upward for storage.
- Structure: Two-spar stressed skin aluminum-alloy construction.
- Ailerons: Dynamically and statically-balanced, with upper surfaces of metal and lower surfaces covered with fabric.
- Flaps: Split perforated flaps operate both as dive brakes (opening upward and downward) and as landing flaps (lower flaps can operate alone when upper flaps are locked). Wing-tip slats extend when landing gear is lowered.
- Fuselage:
- Construction: Aluminum-alloy semi-monocoque with flush-riveted smooth Alclad skin.
- Tail Unit:
- Type: Cantilever monoplane with fixed surfaces made of aluminum-alloy frames and flush-riveted Alclad skin. Movable surfaces have aluminum-alloy frames and are covered with fabric.
Landing Gear
- Type: Retractable.
- Main Gear: Comprises two Curtiss oleo-pneumatic shock-absorber struts retracting inwardly into the wings. The apertures are closed by fairings attached to the struts and wheels.
- Tail Wheel: Steerable and partly retractable.
- Additional Features: Equipped with deck arrester gear and retractable catapult spools for carrier operations.
Power Plant
- Engine: Wright R-2600-20, a fourteen-cylinder radial air-cooled, geared, and supercharged engine.
- Propeller: Curtiss Electric four-blade constant-speed airscrew.
- Fuel System: Three self-sealing fuel tanks (two in the center-section, one in the fuselage) with provision for an auxiliary tank in the bomb-bay. Protected fuel and oil lines, with an oil tank located in the engine compartment.
Accommodation and Crew
- Cockpits: Enclosed cockpits for the pilot and observer, both equipped with heating, ventilation, and armor protection.
- Additional Features: Auto pilot, inflatable dinghy stored under the canopy forward of the gunner.
Armament
- Guns:
- Wing-mounted: Two 20 mm cannons or four .50 cal. machine guns.
- Rear Gun: One .50 cal. machine gun on a hydraulic mounting in the rear cockpit. The decking aft of the cockpit can collapse to increase the field of fire.
- Bomb Load: Internal bomb stowage with hydraulically-operated bomb doors, and two external bomb racks under the wings.
- Other Equipment: Camera in the rear cockpit for reconnaissance or observation.
Bibliography
- Robert Stern, Don Greer: SB2C Helldiver in action – Squadron/Signal Publications Aircraft No. 54
- Barrett Tillman, Tom Tullis: Helldiver Units of World War 2 – Osprey Combat Aircraft 3
- SBD Dauntless, SB2C Helldiver – Famous Airplanes of the World 40 (japan)
- Bert Kinzey: SB2C Helldiver in detail & scale 52
- Peter C. Smith: Curtiss SB2C Helldiver, Crowood Press
- Aerodata International – U.S. Navy Carrier Bombers of World War II: TBD Devastator SBD Dauntless SB2C Helldiver TBF/TBM Avenger – Squadron/Signal Publications 6205
- Peter M. Bowers: Curtiss Aircraft 1907-1947
- Phil H. Listemann: The Curtiss SB2C Helldiver in French Service – Allied Wings No 12
- David Doyle: SB2C Helldiver in Action Squadron/Signal Publications 10235
- Harold Andrews: The Curtiss SB2C-1 Helldiver, Aircraft Profile No. 124
- John M. Elliott – The Official Monogram U.S. Navy and Marine Corps Aircraft Color Guide, Vol 2: 1940-1949
- Thomas E. Doll – US Navy Aircraft Camouflage & Markings 1940-1945, Squadron/Signal Publications 6087
- Thomas E. Doll, Barkley R. Jackson: Navy Air Colors: United States Navy, Marine Corps, and Coast Guard Aircraft Camouflage and Markings, Vol. 1, 1911-1945 – Squadron/Signal Publications 6159