U.S.A.A.F. / U.S.A.F. Attack Aircraft
First Series (1928 to 1962)

Bibliography/References:
American Combat Planes of the 20th Century
, Third Edition by Ray Wagner
American Military Aircraft by Joseph Baugher
Most photographs are courtesy of the National Museum of the US Air Force's website.

Notes:
You may notice several aircraft in this list, which never actually saw any US service, but were designated in the A-series sequence. The reason for this was to comply with contractual requirements as required by the Lend-Lease Act.

A-1

Notes: Deliberately skipped, to avoid confusion with the then in-service A-1 Ambulance aircraft

A-2

A-3

A-4

A-5

A-6

XA-7

Manufacturer: Fokker

Performance:

Engine: Curtiss V-1570-27 providing 600 hp
Top Speed
: 184 MPH
Landing Speed: 61 MPH

Dimensions:

Wingspan: 46 feet 9 inches
Wing Area: 333 square feet
Length: 31 feet
Height: 9 feet 5 inches
Empty Weight: 3,866 lbs
Gross Weight: 5,650 lbs
Fuel: 102 gallons

Armament:

4 x .30 MGs
1 x .30 MG (rear gunner)

XA-8 Shrike

Manufacturer: Curtiss

Performance:

Engine: Curtiss V-1570-23 providing 600 hp
Top Speed
: 197 MPH at sea level, 191 MPH at 5,000 feet
Cruising Speed: 162.5 MPH
Landing Speed: 75 MPH (65 MPH with flaps down)
Service Ceiling: 19,800 feet
Absolute Ceiling: 21,450 feet
Range: 682 miles

Dimensions:

Wingspan: 44 feet
Wing Area: 285 square feet
Length: 32 feet 6 inches
Height: 9 feet
Empty Weight: 3,673 lbs
Gross Weight: 5,413 lbs
Fuel: 96 to 123 gallons

Armament:

4 x .30 MGs
1 x .30 MG (rear gunner)

Notes: First flew in June 1931.

YA-8 Shrike

Manufacturer: Curtiss

Performance:

Engine: Curtiss V-1570-31 providing 600 hp
Top Speed
: 183 MPH at sea level, 179.5 MPH at 5,000 feet
Cruising Speed: 157.5 MPH
Landing Speed: 69 MPH
Service Ceiling: 18,100 feet
Absolute Ceiling: 19,700 feet
Range: 425 miles with 464 lbs of bombs

Dimensions:

Wingspan: 44 feet 3 inches
Wing Area: 285 square feet
Length: 32 feet 10 inches
Height: 9 feet
Empty Weight: 3,938 lbs
Gross Weight: 5,706 lbs (check book)
Maximum Weight:
Fuel: 53 to 101 gallons

A-8A Shrike (Y1A-8A)

Manufacturer: Curtiss

Performance:

Engine: Curtiss V-1570-57 providing 675 hp
Top Speed
: 181 MPH at sea level, 176 MPH at 5,000 feet
Cruising Speed: 156 MPH
Landing Speed: 75.5 MPH
Service Ceiling: 17,000 feet
Absolute Ceiling: 18,600 feet
Range: 624 miles

Dimensions:

Wingspan: 44 feet 3 inches
Wing Area: 285 square feet
Length: 33 feet 7 inches
Height: 9 feet 2 inches
Empty Weight: 4,330 lbs
Gross Weight: 6,287 lbs
Fuel: 57 to 105 gallons

YA-9

Manufacturer: Lockheed

Notes: Attack version of the YP-24. Died due to Lockheed's inability to deliver the five contracted aircraft.

YA-10 Shrike

Manufacturer: Curtiss

Performance:

Engine: Pratt & Whitney R-1690-9 providing 625 hp at sea level
Top Speed
: 175 MPH at sea level

Dimensions:

Wingspan: 44 feet 3 inches
Wing Area: 285 square feet
Length: 32 feet 6 inches
Gross Weight: 6,135 lbs
Fuel: 53 to 101 gallons

Armament:

4 x .30 MGs
1 x .30 MG (rear gunner)

Could carry:
    10 x 30 lb bombs (Internally)
    or
    4 x 116 lb bombs (Externally)

Notes: This is actually the first YA-8 built; it was held up and refitted with air-cooled P&W Hornets. Due to experience with this installation, the US Army began to favor air-cooled engines for future ground attack aircraft. Was offered to the US Navy in a slightly modified version by Curtiss as the XS2C-1.

A-11

Manufacturer: Consolidated

Performance:

Engine: Curtiss V-1570-59 providing 675 hp
Top Speed
: 227.5 MPH at sea level
Cruising Speed: 193 MPH
Landing Speed: 84 MPH
Service Ceiling: 23,300 feet
Absolute Ceiling: 24,900 feet
Range: 470 miles with 327 lbs of bombs

Dimensions:

Wingspan: 43 feet 11 inches
Wing Area: 297 Square feet
Length: 29 feet 3 inches
Height: 9 feet 10 inches
Empty Weight: 3,805 lbs
Gross Weight: 5,490 lbs
Fuel: 90 to 180 gallons

Armament:

four fixed-wing guns, and one flexible gun

Could carry:
    10 x 30 pound bombs

Notes: Development of the basic design of the YA-9 by Consolidated. Produced initially as the Y1A-11.

XA-11A

Manufacturer: Consolidated

Notes: A-11 modified by Bell Aircraft in December 1936 as a flying test bed for the Allison V-1710 1,000 hp engine.

A-12

Manufacturer: Curtiss

Performance:

Engine: Wright R-1820-21 providing 670 hp at sea level
Top Speed
: 177 MPH at sea level, 173.5 MPH at 5,000 feet
Cruising Speed: 150.5 MPH
Landing Speed: 69.5 MPH
Service Ceiling: 15,150 feet
Absolute Ceiling: 16,600 feet
Range: 510 miles with 464 lbs of bombs

Dimensions:

Wingspan: 44 feet
Wing Area: 285 square feet
Length: 32 feet 3 inches
Height: 9 feet 4 inches
Empty Weight: 3,898 lbs
Gross Weight: 5,756 lbs
Maximum Weight: 5,900 lbs
Fuel: 66 to 114 gallons

XA-13

Manufacturer: Northrop

Performance:

Engine: Wright R-1820-37 providing 712 hp at 3,300 feet
Top Speed: 207 MPH at 3,300 feet
Cruising Speed: 172 MPH
Landing Speed: 70 MPH
Service Ceiling: 21,750 feet
Absolute Ceiling: 23,600 feet
Range: 1,100 miles

Dimensions:

Wingspan: 48 feet
Wing Area: 362 square feet
Length: 29 feet 2 inches
Height: 9 feet 2 inches
Empty Weight: 3,600 lbs
Gross Weight: 6,463 lbs
Maximum Weight: 6,575 lbs
Fuel: 245 gallons

YA-13

Manufacturer: Northrop

XA-14

Manufacturer: Curtiss

Performance:

Engine: 2 x Wright R-1670-5 providing 775 hp at 10,000 feet
Top Speed
: 243 MPH at sea level, 249 MPH at 4,550 feet, 254 MPH at 9,750 feet
Cruising Speed: 211 MPH
Landing Speed:75 MPH
Service Ceiling: 27,125 feet
Absolute Ceiling: 28,500 feet
Range: 816 miles with 600 lbs of bombs

Dimensions:

Wingspan: 59 feet 5 inches
Wing Area: 526 square feet
Length: 40 feet 3 inches
Height: 10 feet 9 inches
Empty Weight: 8,456 lbs
Gross Weight: 11,738 lbs
Fuel: 287 to 617 gallons

Armament:

4 x .30 Caliber MGs (Nose)
1 x .30 Caliber MG (Flexible Rear Gun)

Could carry:
    20 x 30 lb bombs
    or
    4 x 116 lb bombs

XA-15

Manufacturer: Martin

Notes: Proposed attack version of the Martin YB-10. Would have had two R-1820-25s, and weighed 12,356 lbs gross. Top speed would be 214 MPH at 4,500 feet. This design was terminated in the paper stage in favor of the XA-14, which promised faster speed.

XA-16

Manufacturer: Northrop

Performance:

Engine: Pratt & Whitney R-1830-9 delivering 950 hp at takeoff and 850 hp at 8,000 feet
Top Speed
: 212 MPH

Dimensions:

Wingspan: 48 feet
Wing Area: 362 square feet
Length: 29 feet 8 inches
Gross Weight: 6,750 lbs

Notes: YA-13 with 850 hp R-1830-9s.

A-17

Manufacturer: Northrop

Performance:

Engine: Pratt & Whitney R-1535-11 delivering 750 hp
Top Speed
: 206 MPH at sea level
Cruising Speed: 170 MPH
Landing Speed: 67.5 MPH
Service Ceiling: 20,700 feet
Absolute Ceiling: 22,150 feet
Range: 650 miles with 654 lbs of bombs

Dimensions:

Wingspan: 47 feet 9 inches
Wing Area: 362 square feet
Length: 32 feet
Height: 12 feet
Empty Weight: 4,913 lbs
Gross Weight: 7,337 lbs
Fuel: 150 to 287 gallons

A-17A

Manufacturer: Northrop

Performance:

Engine: Pratt & Whitney R-1535-13 providing 825 hp at 2,500 feet
Top Speed
: 220 MPH at 2,500 feet
Cruising Speed: 170 MPH
Landing Speed: 64 MPH
Service Ceiling: 19,400 feet
Absolute Ceiling: 20,800 feet
Range: 732 miles with 654 lbs of bombs

Dimensions:

Wingspan: 47 feet 9 inches
Wing Area: 362 square feet
Length: 31 feet 8 inches
Height: 12 feet
Empty Weight: 5,106 lbs
Gross Weight: 7,550 lbs
Fuel: 151 to 247 gallons

A-18

Manufacturer: Curtiss

Performance:

Engine: Wright R-1820-47 providing 930 hp at takeoff and 850 hp at 2,500 feet
Top Speed
: 238.5 MPH at 2,500 feet
Cruising Speed: 211 MPH
Landing Speed: 73 MPH
Service Ceiling: 28,650 feet
Absolute Ceiling: 30,000 feet
Range: 1,443 miles with 654 lbs of bombs

Dimensions:

Wingspan: 59 feet 6 inches
Wing Area: 526 square feet
Length: 42 feet 4 inches
Height: 15 feet
Empty Weight: 9,410 lbs
Gross Weight: 12,679 lbs
Maximum Weight: 13,170 lbs
Fuel: 287 to 630 gallons

Y1A-18

Manufacturer: Curtiss

Notes: First flew July 3, 1937, thirteen were built, of which twelve served in the 8th Attack Squadron until they were transferred to the 15th Attack Squadron.

YA-19

Manufacturer: Vultee

Performance:

Engine: 2 x Pratt & Whitney R-1830-17 providing 1,200 hp at takeoff and 1,050 hp at 6,500 feet
Top Speed
: 230 MPH at 6,500 feet
Cruising Speed: 207 MPH
Landing Speed: 80 MPH
Service Ceiling: 20,400 feet
Absolute Ceiling: 22,000 feet
Range: 1,100 miles with 1,080 lbs of bombs

Dimensions:

Wingspan: 50 feet
Wing Area: 384 square feet
Length: 37 feet 10 inches
Height: 10 feet
Empty Weight: 6,452 lbs
Gross Weight: 10,421 lbs
Fuel: 30 to 311 gallons

Armament:

6 x .30 cal MGs

Could carry:
    36 x 30 lb bombs

Notes: Improved V-11 export plane ordered June 24, 1938 for evaluation by the US Army. First flew January 27, 1939.

XA-19A

Manufacturer: Vultee

Notes: Last YA-19 built. Converted into engine test bed for the 1,200 hp Lycoming O-1230-1 engine with a longer tail. First flew in this configuration May 22, 1940.

XA-19B

Manufacturer: Vultee

Note: Second YA-19 built. Was converted into a flying engine test bed for the Pratt and Whitney R-2800-1.

A-20 Havoc

Manufacturer: Douglas

A-20A Havoc

Manufacturer: Douglas

A-20B Havoc

Manufacturer: Douglas

A-20C Havoc

Manufacturer: Douglas

A-20D Havoc

Manufacturer: Douglas

A-20E Havoc

Manufacturer: Douglas

XA-20F Havoc

Manufacturer: Douglas

A-20G Havoc

Manufacturer: Douglas

A-20H Havoc

Manufacturer: Douglas

A-20J Havoc

Manufacturer: Douglas

A-20K Havoc

Manufacturer: Douglas

XA-21

Manufacturer: Stearman

Performance:

Engine: 2 x Pratt & Whitney R-2180-7, delivering 1,400 hp at takeoff and 1,150 lip at 7,000 feet
Top Speed
: 257 MPH at 5,000 feet
Cruising Speed: 200 MPH
Landing Speed: 72 MPH
Service Ceiling: 20,000 feet
Range: 720 miles with 1,200 lbs of bombs

Dimensions:

Wingspan: 65 feet
Wing Area: 607 square feet
Length: (Need to check books)
Height: 14 feet 2 inches
Empty Weight: 12,760 lbs
Gross Weight: 18,257 lbs
Fuel: 450 to 520 gallons

Armament:

4 x .30 caliber MGs (Wings)
1 x .30 caliber MG (Flexible Nose Gun)
1 x .30 caliber MG (Top Turret)
1 x .30 Caliber MG (Belly Tunnel)

Could carry:
    2 x 600 lb bombs
    or
    6 x 300 lb bombs
    or
    90 x 30 lb bombs

Photographs: Side view of original nose
                     Side view of redesigned nose

XA-22

Manufacturer: Martin

Performance:

Engine: Pratt & Whitney R-1830-37 providing 1,200 hp at takeoff and 1,100 hp at 5,000 feet
Top Speed
: 280 MPH at 5,000 feet
Cruising Speed: 260 MPH
Service Ceiling: 20,000 feet
Range: 750 miles with 1,800 lbs of bombs; 1,200 miles with 1,200 lbs of bombs

Dimensions:

Wingspan: 64 feet 4 inches
Wing Area: 538.5 square feet
Length: 46 feet 8 inches
Height: 10 feet
Empty Weight: 11,170 lbs
Gross Weight: 16,000 lbs
Maximum Weight: 17,000 lbs
Fuel: 390 to 530 gallons

Armament:

4 x .30 caliber MGs (Wings)
1 x .30 caliber MG (Retractable Turret)
1 x .30 caliber MG (Ventral gun Tunnel)

Could carry:
    60 x 30 pound bombs or 4 x 300 pound bombs.

Notes: Purchased by USAAC on May 20, 1939. Lost out to the Douglas 7B (A-20)

Photographs: Quarter view of XA-22 on the flightline.

XA-23

Manufacturer: Martin

Notes: Planned version with Wright R-3350-11s.

A-24 Dauntless (SBD-3A)

Manufacturer: Douglas

Performance:

Engine: Wright R-1820-52 providing 1,000 hp takeoff and 800 hp at 16,000 feet
Top Speed
: 250 MPH at 17,200 feet
Cruising Speed: 173 MPH
Landing Speed: 75 MPH
Service Ceiling: 26,000 feet
Range: 950 miles with 1,000 lbs of bombs

Dimensions:

Wingspan: 41 feet 6 inches
Wing Area: 325 square feet
Length: 32 feet 8 inches
Height: 12 feet 11 inches
Empty Weight: 6,265 lbs
Gross Weight: 9,200 lbs
Maximum Weight: 10,200 lbs
Fuel: 260 gallons

Armament:

2 x .50 caliber MGs (Nose)
2 x .30 caliber MGs (Flexible Rear Guns)

Could carry up to 1,200 lbs of bombs

Notes: 78 were ordered by the Army in July 1940, and were delivered from June to October of 1941. Differences from the US Navy SBD-3A model were deletion of deck landing gear and a new tailwheel. A further 90 were ordered under a second contract issued April 16, 1942.

A-24A Dauntless (SBD-4A)

Manufacturer: Douglas

Notes: 170 were ordered under a contract issued April 16, 1942.

A-24B Dauntless (SBD-5)

Manufacturer: Douglas

Performance:

Engine: Wright R-1820-60 delivering 1,200 hp on takeoff and 900 hp at 14,000 feet
Top Speed
: 254 MPH at 15,000 feet
Cruising Speed: 180 MPH
Landing Speed: 75 MPH
Service Ceiling: 27,000 feet
Range: 950 miles with 1,000 lbs of bombs; 1,250 miles as a scout

Dimensions:

Wingspan: 41 feet 6 inches
Wing Area: 325 square feet
Length: 33 feet
Height: 12 feet 11 inches
Empty Weight: 6,330 lbs
Gross Weight: 9,250 lbs
Maximum Weight: 10,250 lbs
Fuel: 260 gallons

Notes: 615 were delivered between March and December of 1943.

Photographs: Quarter view of an A-24B on the flightline

A-25A Helldiver (SB2C-1A)

Manufacturer: Douglas

Performance:

Engine: Wright R-2600-8 providing 1,700 hp takeoff and 1,450 hp at 12,000 feet
Top Speed
: 285 MPH at 12,400 feet; 269 MPH at sea level
Cruising Speed: 155 MPH
Service Ceiling: 24,600 feet
Range: 1,130 miles with 1,000 lbs; 1,090 miles with 2,000 lbs; 2,020 miles in ferry mode

Dimensions:

Wingspan: 49 feet 9 inches
Wing Area: 422 square feet
Length: 36 feet 8 inches
Height: 14 feet 9 inches
Empty Weight: 10,363 lbs
Gross Weight: 15,076 lbs
Maximum Weight: 17,162 lbs
Fuel: 320 to 566 gallons

Armament:

4 x .50 caliber MGs (Wing)
1 x .50 caliber MG (Flexible Rear Gun)

Could carry:
    up to two 1,000 lb bombs

Notes: Ordered by the Army under a December 31, 1940 contract. First flew September 29, 1942. Before enough were delivered to equip a full Group, the Army's priorities had changed, and the A-25 was relegated to second line duties. 900 were eventually built, of which the final 410 were sent to the US Navy and USMC as SB2C-1A trainers. Changes compared to the Navy version were the deletion of the carrier landing gear along with different wheels. After the tenth production aircraft, wing folding capability was deleted. But most notable was the increase in armor protection from 195 pounds to 669 (!) pounds.

Photographs: Side view of A-25A in flight.

XA-26 Invader

Notes: Glass nose prototype.

Manufacturer: Douglas

Performance:

Engine: 2 x P&W R-2800-27s providing 2,000 hp on takeoff and 1,600 hp at 13,500 ft.
Top Speed
: 370 MPH at 17,000 ft
Cruising Speed: 212 MPH
Landing Speed: 100 MPH
Service Ceiling: 31,300 feet
Range: 1,800 miles with 3,000 lbs of bombs; 2,500 miles in ferry configuration.

Dimensions:

Wingspan: 70 feet
Wing Area: 540 square feet
Length: 51 feet 2 inches
Height: 18 feet 6 inches
Empty Weight: 21,150 lbs
Gross Weight: 31,000 lbs
Fuel: 830 to 1,050 gallons

Armament:

2 x .50 caliber MGs (Fixed Nose Mounts)
2 x .50 Caliber MGs (Dorsal Remote Turret)
2 x .50 Caliber MGs (Ventral Remote Turret)

Could carry:
    up to 4,000 lbs of ordnance

XA-26A Invader

Notes: Night fighter prototype. Not proceeded with due to success of P-61.

Manufacturer: Douglas

Performance:

Engine: 2 x P&W R-2800-27s providing 2,000 hp on takeoff and 1,600 hp at 13,500 ft.
Top Speed
: 365 MPH at 17,000 ft
Cruising Speed: 264 MPH
Service Ceiling: 25,900 feet

Dimensions:

Wingspan: 70 feet
Wing Area: 540 square feet
Length: 52 feet 5 inches
Empty Weight: 20,794 lbs
Gross Weight: 25,300 lbs
Max Weight: 28,893 lbs
Fuel: 440 to 800 gallons

Armament:

4 x 20mm Cannon (Fixed Belly Tray)
4 x .50 Caliber MGs (Dorsal Turret)

XA-26B Invader

Notes: Solid nose prototype.

Manufacturer: Douglas

Performance:

Engine: 2 x P&W R-2800-27s providing 2,000 hp on takeoff and 1,600 hp at 13,500 ft.
Top Speed
: 359 MPH at 16,000 ft
Service Ceiling: 25,700 feet

Dimensions:

Wingspan: 70 feet
Wing Area: 540 square feet
Length: 50 feet
Empty Weight: 20,225 lbs
Gross Weight: 28,855 lbs
Fuel: 440 to 800 gallons

Armament:

1 x 75mm T7 Cannon (Nose)
2 x .50 Caliber MGs (Dorsal Remote Turret)
2 x .50 Caliber MGs (Ventral Remote Turret)

A-26B-10 Invader

Notes: Production solid-nose Invader.

Manufacturer: Douglas

Performance:

Engine: 2 x P&W R-2800-27s or -71s providing 2,000 hp on takeoff and 1,600 hp at 13,500 ft.
Top Speed
: 355 MPH at 15,000 ft
Cruise Speed: 284 MPH
Landing Speed: 100 MPH
Service Ceiling: 22,100 feet
Range: 1,400 miles with 4,000 lbs of bombs. 3,200 miles in ferry configuration.

Dimensions:

Wingspan: 70 feet
Wing Area: 540 square feet
Length: 50 feet
Height: 18 feet 6 inches
Empty Weight: 22,370 lbs
Gross Weight: 35,000 lbs
Fuel: 925 to 1,600 gallons

Armament:

1 x 75mm Cannon and 2 x .50 Caliber MGs (Nose)
or
2 x 37mm Cannons and 4 x .50 Caliber MGs (Nose)
or
1 x 75mm Cannon and 1 x 37mm Cannon (Nose)
or
6 x .50 caliber MGs with 400 rpg (Nose)

2 x .50 Caliber MGs (Dorsal Remote Turret)
2 x .50 Caliber MGs (Ventral Remote Turret)

6 x 500 lb (Bomb Bay)
or
4 x 1,000 lb (Bomb Bay)

A-26B-66 Invader

Notes: Late-production solid-nose Invader.

Manufacturer: Douglas

Performance:

Engine: 2 x P&W R-2800-79s providing 2,000 hp on takeoff and 2,360 hp through WEP.
Top Speed
: 371 MPH at 10,000 ft, 360 MPH at sea level
Cruise Speed: 230 MPH
Landing Speed: 113 MPH
Service Ceiling: 19,200 feet
Range: 966 miles with 4,000 lbs of bombs. 3,354 miles in ferry configuration.

Dimensions:

Wingspan: 70 feet
Wing Area: 540 square feet
Length: 50 feet
Height: 18 feet 6 inches
Empty Weight: 22,362 lbs
Gross Weight: 40,015 lbs
Fuel: 1,360 to 2,055 gallons

Armament:

1 x 75mm Cannon and 2 x .50 Caliber MGs (Nose)
or
2 x 37mm Cannons and 4 x .50 Caliber MGs (Nose)
or
1 x 75mm Cannon and 1 x 37mm Cannon (Nose)
or
6 x .50 caliber MGs with 400 rpg (Nose)

6 x .50 Caliber MGs (Wings; firing forward)
2 x .50 Caliber MGs (Dorsal Remote Turret)
2 x .50 Caliber MGs (Ventral Remote Turret)

6 x 500 lb (Bomb Bay)
or
4 x 1,000 lb (Bomb Bay)

A-26C-50 Invader

Manufacturer: Douglas

Performance:

Engine: 2 x P&W R-2800-79s providing 2,000 hp on takeoff and 2,360 hp through WEP.
Top Speed
: 372 MPH at 10,000 ft, 361 MPH at sea level
Cruise Speed: 226 MPH
Service Ceiling: 20,450 feet
Combat Radius: 892 miles with 4,000 lbs of bombs.
Maximum Range: 3,267 miles in ferry configuration.

Dimensions:

Wingspan: 70 feet
Wing Area: 540 square feet
Length: 51 feet 3 inches
Height: 18 feet 6 inches
Empty Weight: 22,690 lbs
Gross Weight: 37,740 lbs
Fuel: 1,235 to 1,910 gallons

Armament:

2 x .50 caliber MGs (Fixed Nose Mounts)
2 x .50 Caliber MGs (Dorsal Remote Turret)
2 x .50 Caliber MGs (Ventral Remote Turret)

Could carry:
    up to 4,000 lbs of ordnance

XA-26D Invader

Manufacturer: Douglas

Notes: Prototype for planned production solid nose A-26D version which would have 2,100 hp R-2800-83s. Contracts for 750 A-26Ds were cancelled following V-J day.

XA-26E Invader

Manufacturer: Douglas

Notes: Prototype for planned production glass nose A-26E version which would have 2,100 hp R-2800-83s. Contracts for 2,150 A-26Es were cancelled following V-J day.

XA-26F Invader

Manufacturer: Douglas

Notes: Modified A-26B with 2,100 hp R-2800-83s and a J31 turbojet. Top speed was around 435 MPH at 15,000 feet. Not proceeded with due to decision to procure B-45 instead.

Photographs: Side view showing the turbojet installation with the intake replacing the rear gunner's position.

A-26G Invader

Manufacturer: Douglas

Notes: Proposal for post-war production solid-nose Invader with more powerful R-2800s, various detail improvements. Not proceeded with.

A-26H Invader

Manufacturer: Douglas

Notes: Proposal for post-war production glass-nose Invader with more powerful R-2800s, various detail improvements. Not proceeded with.

A-27

Manufacturer: North American
Manufacturer Designation: NA-69

Performance:

Engine: Wright R-1820-75 providing 785 hp at takeoff and 745 hp at 9,600 feet
Top Speed
: 250 MPH at 11,500 feet
Cruising Speed: 220 MPH
Landing Speed: 70 MPH
Climb Rate:
Service Ceiling: 28,000 feet
Range: 575 miles with 400 lbs of bombs

Dimensions:

Wingspan: 42 feet
Wing Area: 258 square feet
Length: 29 feet
Height: 12 feet 2 inches
Empty Weight: 4,520 lbs
Gross Weight: 6,006 lbs
Maximum Weight: 6,700 lbs
Fuel: 70 to 120 gallons

Armament:

2 x .30 caliber MGs (Nose)
1 x .30 caliber MG (Flexible Rear Gun)

Could carry:
    up to four 100 lb bombs

Notes: Attack version of the AT-6 Texan ordered by Thailand. They were shipped abroad but were intercepted by the Army and impressed into service in the Philippines.

A-28 Hudson V

Manufacturer: Lockheed

Performance:

Engine: 2 x Pratt & Whitney R-1830-45 providing 1,050 hp takeoff, KMX) hp at 11,500'
Top Speed
: 260 MPH at 12,500 feet
Cruising Speed: 206 MPH
Landing Speed: 68 MPH
Service Ceiling: 26,000 feet
Range: 1,500 miles with 1,400 lbs of bombs

Dimensions:

Wingspan: Same as Hudson I
Wing Area: Same as Hudson I
Length: Same as Hudson I
Height: Same as Hudson I
Empty Weight: 12,810 lbs
Gross Weight: 18,500 lbs
Maximum Weight: 20,500 lbs
Fuel: 644 gallons

A-28A Hudson VI

Manufacturer: Lockheed

Performance:

Engine: 2 x Pratt & Whitney R-1830-67 providing 1,200 hp at takeoff
Top Speed
: 261 MPH
Cruising Speed: 224 MPH
Landing Speed: 72 MPH
Service Ceiling: 27,000 feet
Range: 2,160 mile maximum range

Dimensions:

Wingspan: 65 feet 6 inches
Wing Area: 551 square feet
Length: 44 feet 4 inches
Height: (check book)
Empty Weight: 13,195 lbs
Gross Weight: 18,500 lbs
Maximum Weight: 22,360 lbs
Fuel: 664 to 1,028 gallons

A-29 Hudson IIIA

Manufacturer: Lockheed

Performance:

Engine: 2 x Wright R-1820-87 providing 1,200 hp at takeoff and 1,000 hp at 14,200 feet
Top Speed
: 253 MPH at 15,000 feet
Cruising Speed: 205 MPH
Landing Speed: 68 MPH
Service Ceiling: 26,500 feet
Range: 1,550 miles with 1,400 lbs of bombs

Dimensions:

Wingspan: 65 feet 6 inches
Wing Area: 551 square feet
Length: 44 feet 4 inches
Height: 11 feet 11 inches
Empty Weight: 12,825 lbs
Gross Weight: 20,500 lbs
Maximum Weight: 21,300 lbs
Fuel: 644 to 1,028 gallons

A-30A-1 to A-30A-5 Baltimore IV

A-30A-30 Baltimore V

XA-31A Vengeance (V-88)

Manufacturer: Consolidated Vultee

XA-31B Vengeance

Manufacturer: Northrop

Notes: Modified XA-31A; used as test ship for the Pratt & Whitney XR-4360-1 Wasp Major.

XA-31C Vengeance

Manufacturer: Northrop

Notes: Modified A-31A-VN used as flying test bed for R-3350-18 Turbo Cyclone. One converted.

YA-31C Vengeance

Manufacturer: Northrop

Notes: Modified A-31A-VNs used to test Wright R-3350-17s with four bladed props for the B-29 program. Five converted.

A-32

Manufacturer: Brewster

Performance:

Engine: Pratt & Whitney R-2800-37 providing 2,100 hp at takeoff and 1,600 hp at 13,500 feet
Top Speed
: 311 MPH at 13,200 feet; 279 MPH at sea level
Cruising Speed: 236 MPH
Landing Speed: 75 MPH
Climb Rate: 10,000 feet in 5.7 minutes
Service Ceiling: 26,000 feet
Range: 500 miles with 3,000 lbs of bombs

Dimensions:

Wingspan: 45 feet 1 inch
Wing Area: 425 square feet
Length: 40 feet 7 inches
Height: 12 feet 8 inches
Empty Weight: 11,820 lbs
Gross Weight: 15,512 lbs
Maximum Weight: 19,960 lbs
Fuel: 200-530 gallons

Armament:

4 x 20mm cannons (Wings, 120 rpg) – the second prototype flew with four 37mm cannons instead.
6 x .50 caliber MGs (Wings; 400 rpg)
Internal bomb bay capable of accommodating 1,000 lbs

Could carry:
    2 x 1,000 lb bombs on underwing racks

Notes: Proposed on April 15, 1941; two prototypes ordered on October 31, 1941. Designated A-34 in May 1942 for lend-lease purposes. First flew May 22, 1943. Despite good flying qualities and 650 (!) lbs of armor, the design was not proceeded with beyond a few exports to the Royal Air Force, due to it being slower and shorter ranged than the A-20 Havoc at the time in service.

Photographs: XA-32 Front Quarter View
                     XA-32 Rear Quarter View
                     XA-32 Lower In-flight View

                     XA-32A Side view

A-33 (Douglas 8A-5)

Manufacturer: Douglas

Performance:

Engine: 2 x Wright R-1820-87 providing 1,200 hp at takeoff and 1,000 hp at 6,900 feet
Top Speed
: 248 MPH at 15,700 feet
Landing Speed: 67 MPH
Service Ceiling: 29,000 feet

Dimensions:

Wingspan: 47 feet 9 inches
Wing Area: 363 square feet
Length: 32 feet 6 inches
Height: 9 feet 4 inches
Empty Weight: 5,510 lbs
Gross Weight: 8,600 lbs
Maximum Weight: 9,200 lbs
Fuel: 173 to 252 gallons

Armament:

4 x .30 Caliber MGs (Wings)
2 x .50 Caliber MGs (Wings)
1 x .30 Caliber MG (Flexible Nose Gun?)

Could carry:
    Up to 1,800 lbs of bombs

Notes: Douglas 8A-5s to be bought by Peru. US Army acquired them instead.

A-34 Bermuda (SB2A)

A-35A Vengeance

Manufacturer: Northrop

Performance:

Engine: Wright R-2600-19 providing 1,600 hp at takeoff and 1,275 hp at 11,500 feet
Top Speed
: 273 MPH at 11,000 feet
Cruising Speed: 235 MPH
Landing Speed: 83 MPH
Service Ceiling: 21,500 feet
Range: 600 miles with 2,000 lbs of bombs; 1,250 miles in ferry mode.

Dimensions:

Wingspan: As A-31
Wing Area: As A-31
Length: As A-31
Height: As A-31
Empty Weight: 10,060 lbs
Gross Weight: 13,500 lbs
Maximum Weight: 15,600 lbs
Fuel: 300 gallons

A-35B Vengeance IV

Manufacturer: Northrop

Performance:

Engine: Wright R-2600-13 providing 1,700 hp at takeoff and 1,350 hp at 13,000 feet
Top Speed
: 279 MPH at 13,500 feet
Cruising Speed: 230 MPH
Landing Speed: 84 MPH
Service Ceiling: 22,300 feet
Range: 550 miles with 1,000 lbs of bombs

Dimensions:

Wingspan: Same as A-31
Wing Area: Same as A-31
Length: Same as A-31
Height: Same as A-31
Empty Weight: 10,300 lbs
Gross Weight: 16,400 lbs
Maximum Weight: 17,100 lbs
Fuel: 300 to 625 gallons

Photographs: 3/4ths Front view

A-36A Mustang

Manufacturer: North American

Performance:

Engine: Allison V-1710-87 providing 1,325 hp at 3,000 feet; 1,500 hp at 5,400 feet at full War Emergency Power
Top Speed
: 310 MPH at xxx ft (check) with two 500 lb bombs, 366 MPH clean.
Cruising Speed: 250 MPH
Landing Speed: 85 MPH
Climb Rate:
Service Ceiling: 25,100 feet with bombs, 27,000 feet clean
Range: 550 miles with two 500 lb bombs, 2,300 miles in ferry mode

Dimensions:

Wingspan: 37 feet
Wing Area: 233 square feet
Length: 32 feet, 3 inches
Height: 12 feet, 2 inches
Empty Weight: 6,610 lbs
Gross Weight: 8,370 lbs
Maximum Weight: 10,000 lbs
Fuel: 80 to 105 gallons

Armament:

6 x .50 caliber machine guns (Wings)

Could carry:
    2 x 500 lb bombs under wing racks, fitted with dive brakes

Notes: Flown by the 27th, 86th and 311th Fighter Bomber Groups during World War II. Erroneously named the “Apache” in many references; this was a post-war invention.

Photographs: 3/4ths Front view

XA-37

Manufacturer: Hughes

Notes: “Two engines were used on the rather mysterious Hughes XA-37, an aircraft which, as of this writing, has had no published photograph. The project began with a company proposal, on December 5, 1939, for a twin-boom bomber powered by two projected liquid-cooled Wright Tornado engines and built of Duramold, a process involving heat-bonded wood and plastic. Pratt & Whitney R-2800-49 Wasps replaced the Tornado when that engine failed to materialize.

In June 1942 the Hughes D-2A was designated XA-37 by the Air Force and a prototype was built at company expense. Like the all-wood de Havilland Mosquito bomber whose performance it was expected to exceed, the Hughes D-2A had no guns. This two-seater had a 60-feet, 6-inch span, 31,672 pounds of gross weight, and was expected to have a 433-mph top speed and a 1,000-mile range with 2,200 pounds of bombs.

Howard Hughes himself hew the aircraft on June 20, 1943, at an isolated California location, but the aircraft was never tested by the Air Force before it was destroyed in a hangar fire. So successful was the shroud of secrecy imposed by Mr. Hughes that no photographs or descriptions were released to the public, although the design was later developed into the XF-11 reconnaissance plane of 1946. Over 30 years passed before research by Walter Boyne revealed the foregoing information.” -- from American Combat Planes of the 20th Century, Third Edition by Ray Wagner – Placeholder until I can write something original in.

XA-38 Grizzly

Manufacturer: Beech

Performance:

Engine: 2 x Wright R-3350-53s, 2,700 hp on take-off up to 2,800 ft
Top Speed
: 376 MPH at 4,800 ft
Cruising Speed: 344 MPH
Landing Speed: 103 MPH
Climb Rate: check book
Service Ceiling: 27,800 feet
Range: 1,070 miles with 2,000 lbs of bombs (1,960 miles in ferry mode)

Dimensions:

Wingspan: 67 feet 4 inches
Wing Area: 626 square feet
Length: 51 feet 9 inches
Height: 13 feet 6 inches
Empty Weight: 22,480 lbs
Gross Weight: 29,900 lbs
Maximum Weight: 32,000 lbs
Fuel: 142.5 to 825 gallons

Armament:

1 x 75mm cannon (Nose, autoloading, with 20 rpg)
2 x .50 caliber MGs (Nose)
2 x .50 caliber MGs (Dorsal Remote Control Turret)
2 x .50 caliber MGs (Ventral Remote Controlled Turret)

Could carry:
    2,000 lbs of bombs through external wing racks

Notes: Began as a two-seat fighter for bomber interception with 75mm gun. Due to existence of XP-71 project, the Beech Model 28 was ordered instead as the XA-38 on September 23, 1942. First flew May 7, 1944. Displayed good flying qualities; but was stillborn due to the B-29 program eating up all available R-3350s.

Photographs: Topish in-flight view
                     Lower in-flight view

XA-39

Manufacturer: Kaiser-Fleetwings

Performance:

Engine: R-2800-27, producing 2,000 hp

Armament:

2 x 37mm cannon (Wings)
4 x .50 caliber MGs (Wings)
Internal Bomb Bay capable of holding 1,000 lb bomb or 2,000 lb torpedo.

Could carry:
   2 x 500 lb bombs on external wing racks

Notes: Did not get past mockup stage.

XA-40

Manufacturer: Curtiss

Performance:

Engine: R-3350-8, producing 2,300 hp

Armament:

Internal Bomb Bay capable of holding 1,000 lb bomb or 2,000 lb torpedo.

Could carry:
   2 x 500 lb bombs on external wing racks

Notes: Did not get past mockup stage. Very similar to the XSB3C-1 for the US Navy.

XA-41

Manufacturer: Consolidated-Vultee (Convair)

Performance:

Engine: Pratt & Whitney XR-4360-9: 3,000 hp takeoff, 2,400 hp at 13,500 feet
Top Speed
: 353 MPH at 15,500 feet
Cruising Speed: 270 MPH
Landing Speed: 74 MPH
Climb Rate: xxxxxx (check book)
Service Ceiling: 27,000 feet
Range: 950 miles with 3,000 lbs of bombs

Dimensions:

Wingspan: 54 feet
Wing Area: 540 square feet
Length: 48 feet, 8 inches
Height: 14 feet, 6 inches
Empty Weight: 13,400 lbs
Gross Weight: 18,800 lbs
Maximum Weight: 23,260 lbs
Fuel: 350 to 445 gallons (1,140 gallons in ferry mode)

Armament:

4 x 37mm cannon (Wings; 50 rpg)
6 x .50 caliber MGs (Wings; 600 rpg)
Internal Bomb Bay capable of carrying 3,000 lbs

Could carry:
    1 x Torpedo
    4 x 1,600 lb bombs
    Extra fuel tanks.

Notes: Began as the Vultee 90 in September 1942, ordered by the USAF on November 10, 1942, and first flew February 11, 1944. Single plane built.

Photographs: Front 3/4ths view as it taxis.
                     Lower in-flight view

XA-42 Mixmaster

Manufacturer: Douglas

Notes: Redesignated XB-42.

XA-43

Manufacturer: Curtiss

Notes: Redesignated XP-87.

XA-44

Manufacturer: Consolidated-Vultee (Convair)

Notes: Redesignated XB-53.

Photographs: Photograph of model of XA-44

XA-45

Manufacturer: Martin

Notes: Completed as XA-51, redesignated XB-51.

Photographs: XB-51 taking off.