Customer Model Type Martin Model No. Martin Serial No. Customer Serial No. 998 The Glenn L. Martin Aviation Museum Type/Customer B-6 Marauder Types Delivery Date Contract Number First Flight Total Built Engine(s) Notes B-6 79 6-46 40-36 -56 Medium bomber/ 0/4/4 343 /5/40 0 R-800-5's First production models, no prototype provided. B-6A 79A 977-997 000, 063 09-5 4-7345 - 7365, 4-7368, 4-743, 4-7477 - 7483 Medium bomber/, RAF 4/8/4 343 0/4 7 R-800-5's Larger guns in nose and tail. Provisions made to carry externally mounted torpedoes. B-6A- 998-999 00-06 064-08 4-7366 - 7367 4-7369 - 7430 4-743 - 7476 6 45 R-800-39's 5 were allotted to the RAF as Marauder Mk I's (FK09- FK60). B-6B 79B 6-96 4-7544 - 764 Medium bomber/ 8/3/4 5/4 8 Uprated engines; large air B-6B- 98-75 77-43 4-766 - 7703 4-7705 - 785, RAF 637 78 47 R-800-4's scoops/filters; lengthened nosewheel struts; slotted flaps; B-6B- 76 44-58 4-7704 4-785 - 7946 9/4/4 95 enhanced armor; ventral 0.30-in guns; twin 0.50-in guns in tail. B-6B-3 97 59-545 4-765 4-7947 - 7973 /7/43 7 9 were allotted to the RAF as Marauder Mk IA's (FK36-380). B-6B-4 546-756 4-7974 - 884 Uprated engines added to -4. B-6B-0 757-906 4-885 - 8334 /8/43 50-0's wingspan increased 6 feet; B-6B-5 387-3386 4-3573 - 367 7//43 00 taller fin and rudder. Twin B-6B-0 3387-3486 4-3673 - 377 46 00 0.50-in guns in nose; four B-6B-5 3487-3586 4-3773 - 387 00 0.50-in package guns added to B-6B-30 3587-3686 4-3873 - 397 00 forward fuselage sides. B-6B-35 3687-3786 4-3973 - 307 00 B-6B-40 694-69 694-695 6393 4-4360 - 43357 4-43360 - 4336 4-43459 9/5/43 049 B-6B-45 6504-6594 4-95738 - 9588 /9/44 9 B-6B-50 6595-6794 4-9589 - 9608 3733 00 B-6B-55 6795-6994 4-9609 - 968 00 B-6C-5 79C 4364-437 4373-4377 4379, 4385 4387-439 4434-4467 4479-4538 4-34673 - 34680 4-3468 - 34686 4-34688, 4-34694 4-34696 - 3470 4-34743 - 34776 4-34788 - 34847 Medium bomber/, RAF 934 98 8 5 6 34 60 Same model as B-6B-0/55, but built in Omaha, Nebraska. 3 were allotted to the RAF as Marauder Mk II's (FB400- FB5). A number of those were later transferred to the Page
B-6C-6 437, 4378 4380-4384 4386 4393-4433 4468-4478 4-3468, 4-34687 4-34689 - 34693 4-34695 4-3470 - 3474 4-34777 - 34787 998 The Glenn L. Martin Aviation Museum B-6C-0 4539-4598 4-34848 - 34907 60 B-6C-5 4599-4688 4-34908 - 34997 90 B-6C-0 4689-4863 4-34998 - 357 75 B-6C-5 4864-506 5063 4-3573 - 35370 4-3537 98 B-6C-30 5065-506 508-59 53 539-54 544-55 4-35374 - 3555 4-3557 - 35538 4-35540 4-35548 - 3555 4-35553 - 35560 4 4 8 B-6C-45 876-9094 4-07497 - 07830 ac-3878 334 5 4 South African Air Force. XB-6D 79D (45) (40-380) Test/ 7/44 ac-303 () R-800-5's Hot air wing, deicers applied. B-6E 79E (6393) plus others (4-43459) Test/ 9/5/43 049 (3) Used as twisted wing prototype; dorsal turret moved forward. B-6F- 79F 6995-7094 4-969 - 9638 Medium bomber/ 5/4/44 00 Added 3.5ϒ in wing incidence. B-6F- 7095-794 4-9639 - 9648, RAF 3733 00 Last 00 supplied to the RAF. B-6F-6 795-794 4-9649 - 9658 00 as Mk III's (HD40-HD60). B-6G- 79G 835-8334 43-345 - 344 Medium bomber/ 00 Detail changes made. All -'s B-6G-5 8335-8534 43-345 - 3444, RAF 3733 00 (HD60-HD676) and -'s B-6G-0 8535-8584 8660-8734 43-3445 - 34464 43-34540 - 3464 50 75 (HD677-HD75) were supplied to the RAF as Marauder Mk III's B-6G- 8585-8659 43-34465 - 34539 75 under the Lend-Lease Act. B-6G-5 985-944 44-67805 - 67944 40 Some of those later went to the B-6G-0 9450-9469 44-67970 - 67989 87 0 SAAF. 9545-9584 44-68065 - 6804 40 B-6G- 9470-9544 44-67990 - 68064 75 B-6G-5 9585-970 9734 44-6805 - 68 44-6854 7 XB-6H (B-6G-5) 79G (970) (44-68) Test aircraft/ () AT-3A (TB-6B) 79B 69-693 696-639 6395-6503 4-43358 - 43359 4-4336 - 43458 4-9569 - 95737 Target tow/ /9/44 ac-049 ac-3733 97 09 Middle River Stump Jumper used for testing a new tandem undercarriage (later installed on the XB-48 and XB-5). Gunnery training/target towing version of the B-6B. Became TB-6B in 944. Page
AT-3B (TB-6C) 79C 506, 5064 507, 530 53-538 543 55-5563 8735-8760 9095-99 4-3537, 4-35373 4-3556, 4-35539 4-3554 - 35547 4-3555 4-3556 - 3587 4-0747 - 07496 4-0783 - 07855 998 The Glenn L. Martin Aviation Museum Target tow/ 934 7 3 6 5 Same as AT-3A's but built in Omaha, Nebraska. 5 were transferred to the Navy as JM- 's; remainder became TB- 6C's in 944. 3878 TB-6G-5 79G 945-9434 44-67945 - 67954 Medium bomber/ /0/44 0 Unarmed crew training version TB-6G-0 9435-9449 44-67955 - 67969 87 5 of the B-6G. Later delivered TB-6G-5 970-9733 44-68 - 6853 3 to the Navy as JM-'s. JM- (AT-3B) 79C (507, 530, 53-538 543) (55-544) (544-5466) 66595-66794 7583-7507 Target tow/navy NOa (s) -3759 JM-P 79C () () Recon/Navy NOa (s) -3759 JM- 79G (945-9449) 90507-9053 Target tow/navy W33-038 (TB-6G) (970-9733) 996-9993 ac-87 XB-7 8 - - Medium bomber/ (XB-33) 89 - - Medium bomber/ XB-33 90 [436-4363] B-33 90 [5794-693] [4-8407 - 4-8408] [4-3584 - 4-35583] High altitude medium bomber/ High altitude medium bomber/ (00) (5) () (5) (3) - - - R-800-9's - - - Two Wright R-3350's - 8645-4555 B-33 90 [6394] [4-3879] Test article/ - 4555 B-35 05 [] [43-356 - 43-3535] Flying wing bomber/ Page 3-4555 for ] for 400] for ] for 00] R-600-5's R-600-5's R-600-5's Four Allison V-4360-7's AT-3B's transferred to the US Navy for gunnery training/target tow. All armor and armament removed. A number of JM-'s converted for photo reconniassance. Converted TB-6G's. Bu905-9053 were retained by the US Air Force. Under Air Corps spec XC-4, studies began 8/39 for a sleeker, high altitude pressurized B-6. Began in 0/40 as a high altitude medium bomber, the XB-33 was converted to Model 90 when weight proved too heavy for two engines. Two airframes for the Super Marauder were begun in 94. 400 production models were ordered before completion of prototypes. When was canceled, both incomplete XB- 33's were destroyed. Under GLM Spec No 4, a static test article of B-33 was ordered. Canceled production version of Northrop XB/YB-35 flying wing intercontinental bomber.
998 The Glenn L. Martin Aviation Museum SPECIFICATIONS: B-6 / B-6A / B-6A- SPECIFICATIONS: B-6B-0 / B-6C Description: High speed medium bomber Description: High speed medium bomber Engine: Two,850 hp Pratt & Whitney R-800-5 Double Wasps / Engine: Two,000 hp Pratt & Whitney R-800-43 Double Wasps B-6A: two Pratt & Whitney R-800-39's Dimensions: Span: 65 ft 0 in; length: 56 ft 0 in; height: 9 ft 0 in; wing area: 60 sq ft Dimensions: Span: 7 ft 0 in; length: 58 ft 3 in; height: ft 6 in; wing area: 659 sq ft Weights:,375 lb empty; 7,00 lb loaded / B-6A-:,74 lb Weights: 4,000 lb empty; 38,00 lb loaded empty; 8,376 lb loaded Crew: 5-7 (pilot, copilot, navigator/nose gunner, radio operator, turret gunner, waist gunner, tail gunner) Crew: 7 (pilot, copilot, navigator/nose gunner, radio operator, turret gunner, waist gunner, tail gunner) Armament: Two 0.50-in guns in Martin 50CE turret (B-6A/A-), one each 0.30-in gun in nose, tail, and ventral positions; 3,000 lbs of bombs Armament: Twelve 0.50-in flexible guns total, two each in turret, nose, tail, and ventral positions, four forward firing package guns; 4,000 lbs of bombs,,000 lb aerial torpedo Performance: Maximum speed: 35 mph at 5,000 ft; cruising speed: 58 mph; landing speed: 30 mph; climb:,500 ft/min; service ceiling: 5,000 ft; range,000 miles Performance: Maximum speed: 8 mph at 5,000 ft; landing speed: 35 mph; climb:,500 ft/min; service ceiling: 3,500 ft; range,800 miles (,50 miles with 3,000 lb of bombs) SPECIFICATIONS: JM- / JM-P / JM- SPECIFICATIONS: XB-7 Description: Naval training/target tow aircraft Description: High altitude medium bomber Engine: Two,850 hp Pratt & Whitney R-800-43 Double Wasps Engine: Two,00 hp Pratt & Whitney R-800-9 Double Wasps Dimensions: Span: 7 ft 0 in; length: 58 ft 3 in; height: ft 6 in; wing area: 659 sq ft Dimensions: Span: 84 ft 0 in; length: 60 ft 9 in; height: 0 ft 0 in; wing area: 750 sq ft Weights: 38,00 lb loaded Weights: 3,5 lb empty; 3,970 lb loaded Crew: Crew: 7 Armament: None Armament: Three flexible 0.30-in guns (nose, rear cockpit fairing, and waist), one flexible 0.50-in gun in tail; 4,000 lb of bombs Performance: Maximum speed: 8 mph at 5,000 ft; landing speed: 35 mph; climb:,500 ft/min; service ceiling: 3,500 ft; range,800 miles Performance: Maximum speed: 376 mph; service ceiling: 33,500 ft; range:,900 miles Page 4
998 The Glenn L. Martin Aviation Museum SPECIFICATIONS: B-33 SPECIFICATIONS: B-35 Description: High altitude medium bomber Description: Flying wing intercontinental bomber Engine: Four,800 hp Wright R-600-5 Double Cyclones each with General Electric CMC-3 turbo superchargers Engine: Four 3,000 hp Allison V-4360-7 liquid cooled V-'s buried in wing, driving contrarotating pusher propellers Dimensions: Span: 34 ft 0 in; length: 79 ft 0 in; height: 4 ft 0 in; Dimensions: Span: 7 ft 0 in; length: 53 ft in; height: 9 ft 4 in wing area:,500 sq ft Weights: 64,948 lb empty; 88,387 lb loaded; 97,97 max Weights: 09,000 lb maximum loaded Crew: 7 Crew: Armament: Six flexible 0.50-in guns mounted in three power operated turrets; up to 4,000 lb of bombs Armament: Twenty 0.50-in guns in remote controlled turrets; up to 5,00 lb of bombs Performance: Maximum speed: 345 mph at 35,000 ft; cruising speed: 4 mph; service ceiling: 39,000 ft; climb:,350 ft/0 min; range:,000 miles Performance: Maximum speed: 40 mph (later 386 mph) at 35,000 ft; cruising speed: 45 mph; service ceiling: 40,000 ft; range: 7,600 miles (later 4,600 miles) with 0,000 lb of bombs Page 5