UNITED STATES MILITARY AIRCRAFT by Jos Heyman

Navy

M Last update: 1 February 2015

M = General Motors (Eastern) (1942-1945)

FM General Motor Wildcat Specifications: span: 38', 11.58 m length: 28'9", 8.76 m engines: 1 Pratt & Whitney R-1830-86 max. speed: 318 mph, 511 km/h

(Source: US Navy)

The Grumman Wildcat was built under licence by the Eastern Aircraft Division of General Motors. The FM-1 was identical to the F4F-4 and 1800 aircraft were ordered from 18 April 1942 of which 1060 were delivered. The serials were 14992/15951 and 46738/46837. The first flight was on 31 August 1942 and 221 aircraft went to the Royal Navy. The FM-2 was a production version of the XF4F-8 and had a length of 28'11", 8.81m and a Wright R-1820-56 engine. 4777 were built with serials 15952/16791, 46838/47437, 55050/55649, 56684/57083, 73499/75158 and 86297/86973 whilst a batch with serials 86974/87719 was cancelled. 370 were supplied to the Royal Navy. A number of FM-2s were converted as FM-2P reconnaissance fighters. Refer also to F4F, F2M

F2M General Motors Specifications: span: 37’6”, 11.43 m length: 28'6", 8.69 m engines: 1 Wright XR-1820-70W max. speed: 320 mph, 515 km/h

(Source: Airplane Characteristics & Performance)

General Motors developed the XF2M-1 single seat fighter based on the FM and three aircraft were ordered in October 1942 with serials 82855/82857. They were, however, cancelled before the first aircraft, which was completed, was flown. Refer also to F4F, FM

F3M General Motors Bearcat Specifications: span: 35'10, 10.92 m length: 28'3, 8.61 m engines: 1 Pratt & Whitney R-2800-34WA max. speed: 424 mph, 682 km/h Production of the F8F-1 by General Motors was contemplated with an order for 1876 F3M-1s with serials 109273/111148 being placed on 5 February 1945. The order was cancelled in September 1945. Refer also to F8F and F4W

TBM General Motors Avenger Specifications: span: 54'2", 16.51 m length: 40', 12.19 m engines: 1 Wright R-2600-8 max. speed: 271 mph, 436 km/h

(Source: US Navy)

Production of the Grumman Avenger was also undertaken by General Motors Eastern Aircraft Division and a total of 7546 were built. The TBM-1 version was similar to the TBF-1 and 550 were ordered on 23 March 1942 with serials 24521/25070. The TBM-1C was the equivalent of the TBF-1C and 2336 were built with serials 16792/17091, 25071/25720, 34102/34105, 45445/46444 and 73177/73498. Conversions included the TBM-1CP (including 17060 and 46427), TBM-1D (including 17091), TBM-1E, TBM-1J, TBM-1L and TBM-1P, which all had their equivalent in the TBF-1 designation. A single TBM-1 (24580) was re-engined with a Wright XR-2600-10 and redesignated as TBM-2. Similarly, a number of TBM-1Cs were re-engined with Wright R-2600-20 engines and served as XTBM-3 prototypes. The serials were 25175, 25521, 25700 and 45645. The TBM-3 version, which was similar to the TBF-3, had a span of 54'2", 16.51m, length of 40'11", 12.47m, 1 Wright R-2600-20 and a max. speed of 267 mph, 430 km/h. 4657 were built with serials 22857/23656, 53050/53949, 68062/69538, 85459/86292 and 91107/91752 whilst production of batches with serials 86293/86296, 91753/92006 and 97532/97672 was cancelled. The TBM-3D designation was assigned to a number of TBM-3s converted as drone directors whilst the TBM-3E designation was assigned to a number of TBM-3s converted with wing radars. The latter included 53053, 53054, 53060, 53065, 53070, 53074, 53098, 53099, 53107, 53110, 53127, 53135, 53142, 53146, 53150, 53151, 53152, 53162, 53167, 53170, 53184, 53185, 53193, 53204, 53205, 53206, 53207, 53214, 53220, 53221, 53230, 53248, 53281, 53287, 53294, 53304, 53311, 53350, 53367, 53382, 53389, 53396, 53399, 53400, 53411, 53413, 53424, 53438, 53448, 53452, 53453, 53461, 53479, 53482, 53493, 53500, 53505, 53506, 53539, 53547, 53548, 53550, 53551, 53557, 53568, 53585, 53590, 53593, 53595, 53599, 53603, 53604, 53609, 53612, 53623, 53626, 53634, 53636, 53642, 53647, 53655, 53664, 53665, 53667, 53672, 53676, 53678, 53686, 53697, 53702, 53715, 53734, 53748, 53768, 53753, 53774, 53776, 53787, 53790, 53796, 53797, 53806, 53815, 53818, 53825, 53837, 53842, 53857, 53858, 53864, 53885, 53888, 53906, 53924, 69291, 69314, 69335, 69340, 69346, 69361, 69367, 69374, 69422, 69423, 69430, 69442, 69447, 69452, 69457, 69466, 69472, 69496, 69498, 69500, 69502, 69506, 69523, 69531, 69533, 85472, 85476, 85493, 85495, 85501, 85512, 85516, 85523, 85524, 85525, 85534, 85537, 85549, 85556, 85571, 85578, 85614, 85621, 85624, 85628, 85674, 85682, 85684, 85686, 85691, 85695, 85729, 85859, 85863, 85867, 85884, 85899, 85921, 85925, 85929, 85930, 85932, 85949, 85954, 85973, 85974, 86009, 86064, 86090, 86100, 86125, 86142, 86154, 86156, 86171, 86174, 86176, 86186, 86205, 86207, 86228, 86234, 86235, 86237, 86246, 86258, 86285, 91123, 91125, 91131, 91184, 91289, 91324, 91329, 91339, 91355, 91419, 91433, 91448, 91462, 91471, 91473, 91477, 91481, 91487, 91493, 91500, 91502, 91506, 91508, 91512, 91519, 91547, 91550, 91562, 91568, 91594, 91624, 91670, 91687, 91695, 91696, 91705, 91722, 91723, 91732, 97135, 97136 and 97137. Some of these were further converted to TBM-3E2 standards (including 53099, 53142, 53924, 86174 and 91723). Other conversions included TBM-3H (with surface search radar), TBM-3J (for bad weather operations), TBM-3L (fitted with search lights), TBM-3M (missile launchers), TBM-3M2, TBM-2N (for night attack duties), TBM-3P (photo reconnaissance duties), TBM-3Q for ECM duties (including 91350 and 91384), TBM-3R (53319, 53587, 86143, 86242, 91195 and others converted for transport duties), TBM-3S (53124, 53134, 53136, 53212, 53258, 53291, 53520, 53582, 53640, 53646, 53671, 53722, 53756, 53920, 69392, 85529, 85623, 85646, 85989, 85996, 86030, 86123, 91173, 91189, 91304, 91328, 91376, 91569 and others converted for anti-submarine duties), TBM-3S2 (including 53087, 53089, 53124, 53202, 53212, 53247, 53250, 53258, 53291, 53582, 53640, 53646, 53651, 53671, 53722, 53756, 53854, 53866, 53920, 69185, 69269, 69392, 69405, 85529, 85623, 85646, 85683, 85746, 85852, 85946, 85979, 85989, 85995, 86003, 86030, 91189, 91304, 91328, 91376, 91467, 91567, 91569 and 91686), TBM-3U (53227, 53835, 69325, 85460, 85594, 85701, 91412, 91741 and others used for general utility and target towing duties), TBM-3W (53076, 53476, 69476 and others for anti-submarine duties) and TBM-3W2 (including 53136,

53361, 53854, 85490, 85650, 85751, 85880, 86039, 86188, 86229, 91155, 91296, 91385, 91403, 91406, 91423, 91456, 91457, 91458, 91476, 91483, 91488, 91498, 91516, 91570, 91713 and 91738). Three examples of an improved version known as the XTBM-4 were built with serials 97673/97675 whilst the production of 2141 TBM-4s with serials 97532/97672, 97676/98601, 102576/104575 and 117729/118928 was cancelled. The XTBM-5 designation was assigned to two TBM-3Es which had been converted in June 1945. They had a span of 57'2", 17.42m. Refer also to TBF

M = Martin (1922-1962)

AM Martin 210 Mauler Specifications: span: 50', 15.24 m length: 41'2", 12.55 m engines: 1 Wright R-3350-4 max. speed: 367 mph, 591 km/h

(Source: US Navy)

The first batch of the AM-1 Mauler was originally ordered as BTM-1 but was redesignated on 11 March 1946 before completion and the first flight on 16 December 1946. In total 132 AM-1s were built with serials 22257/22295, 22297/22345 and 122394/122437. Production with serials 22356/22856, 33615/33714 and 33821/33870 was cancelled. The AM-1Q was a radar counter measure version of which 17 were built with serials 22296, 22346/22355 and 122388/122393. Some of these were initially designated as AM-1. Refer also to BTM and JR2M

BM Martin 125 Specifications: span: 41', 12.50 m length: 28'9", 8.76 m engines: 1 Pratt & Whitney R-1690-44 max. speed: 146 mph, 235 km/h

(Source: US Navy)

A production version of the T5M design, 16 BM-1s were ordered on 9 April 1931 with serials A-8879/8890 and 9214/9217. This was followed by a single XBM-1 with serial 9212 and which was used exclusively by NACA. The BM-2 designation was assigned to 16 aircraft ordered with serials A-9170/9185. Refer also to T5M, T2N

B2M Martin 132 Specifications: span: length: engines: max. speed: The designation B2M-1 has been linked to the Martin 132 dive bomber that was cancelled. It is likely that this was not an official designation. Some references have also linked the designation to US Navy-operated B-26 Marauders.

BTM Martin 210 Mauler Specifications: span: 50', 15.24 m length: 41'2", 12.55 m engines: 1 Pratt & Whitney XR-4360-4 max. speed: 367 mph, 590 km/h

(Source: Aubry Gratton, via 1000aircraftphotos.com photo #8128)

The Martin 210 Mauler was designed in competition with the Douglas Skyraider. Two were ordered as XBTM-1 on 7 January 1944 and were originally to be fitted with liquid cooled in line engines. The serials were 85161/85162 and the first flight was on 26 August 1944. A BTM-1 production version had a Wright R-3350-4 engine and 600 were ordered on 15 January 1945 with serials 22257/22856 but these were redesignated as AM-1 before the first flight could be made. Refer also to AM

FM Martin 127 Specifications: span: length: engines: max. speed: The designation XFM-1 has been linked to the Martin 127 dive bomber that was based on Navy design 107 and was cancelled. It is likely that this was not an official designation.

JM Martin 179 Marauder Specifications: span: 71', 21.64 m length: 58'3", 17.75 m engines: 2 Pratt & Whitney R-2800-43 max. speed: 310 mph, 499 km/h

(Source: William T. Larkins)

A number of AT-23 and B-26 Marauders were transferred from the USAAF to the US Navy. The first two batches consisted of 225 AT-23Bs with serials 66595/66794 and 75183/75207 and they were designated as JM-1. A few of these were converted as JM-1P for photo-reconnaissance duties. Another 47 TB-26Gs were transferred as JM-2 and with serials 90507/90521 and 91962/91993 whilst the transfer of aircraft with serials 90522/90531 was cancelled. Refer also to AT-23, B-26

JRM Martin 170 Mars Specifications: span: 200', 60.96 m length: 117'3", 35.74 m engines: 4 Wright R-3350-18 max. speed: 225 mph, 362 km/h

(Source: US Navy)

The Mars was a heavy transport flying boat based on the XPB2M-1R but with a single tail. Twenty were ordered in January 1945 as JRM-1 of which only five were completed with serials 76819/76823. The first flight was on 21 July 1945 and the first aircraft sank on 5 August 1945. The remaining four aircraft were given the names Hawaii Mars, Philippines Mars, Marshall Mars and Marinas Mars. Aircraft with serials 76825/76838 were cancelled. Aircraft 76824 was fitted with 4 Pratt & Whitney R-4360 and was designated as JRM-2 and named Carolinas Mars. At a later date a number of the JRM-1s were converted to JRM-2 standards but designated as JRM-3. They were 76820/76823. Once released by the US Navy the remaining JRMs were used as firefighting aircraft in Canada. Refer also to PB2M

JR2M Martin 210 Mercury Specifications: span: length: engines: max. speed:

(Source: Martin, via codeonemagazine.com/gallery)

The designation JR2M-1 has been linked to a proposed COD version of the AM-1 Mauler. Dated 1949 the proposal was not explored further and the designation may be informal. Refer also to AM

NM The designation NM was not assigned in the Martin series.

N2M Martin 67 Specifications: span: 41’, 12.50 m length: 27’10”, 8.78 m engines: 1 Wright J max. speed: 112 mph, 180 km/h

(Source: US Navy)

A single example of the N2M-1 trainer was procured with serial A-6800. It was later converted as XN2M-1.

OM Martin 57 Specifications: span: 53', 16.15 m length: 38'1", 11.61 m engines: 1 Curtiss D12 max. speed: 105 mph, 169 km/h

(Source: US Navy?)

The MO-1 was a three seat observation amphibian based on a Bu Aer design. 36 aircraft were built with serials A-6455/6460 and A-6633/6662.

O2M Martin 60 Specifications: span: 43'6", 13.26 m length: 31'10", 9.70 m engines: 1 Curtiss D12 max. speed: 104 mph, 167 km/h

(Source: Martin)

The M2O-1 was a Martin built version of the NAF NO trainer and three were built with a twin float undercarriage and with serials A-6452/6454. Refer also to NO

O3M Martin 83 Specifications: span: length: engines: max. speed: The designation XO3M-1 has been linked to the Martin 83 observation/fighter aircraft that was cancelled. It is likely that this was not an official designation.

PM Martin 117 Specifications: span: 72'10", 22.20 m length: 49'2", 14.99 m engines: 2 Wright R-1750-D max. speed: 119 mph, 191 km/h

(Source: US Navy)

The Martin PM was based on the Navy’s PN-12 design. 30 PM-1 aircraft were ordered in May 1929 with serials A-8289/8313 and A-8477/8481. The PM-2 version (Model 122), which was ordered in June 1930, had a twin tail configuration and a span of 72', 21.95m, length 49', 14.94m, 2 Wright R-1820-64. 25 were built by Martin whilst another two were built up from spares. The serials were A-8662/8686, 0382 and 0384. Refer also to PD, PH, PK, PN

P2M Martin 119 Specifications: span: 100', 30.48 m length: 61.9", 18.82 m engines: 3 Wright R-1820-64 max. speed: 143 mph, 230 km/h

(Source: Aubry Gratton, via 1000aircraftphotos.com photo #7942)

The XP2M-1 was a prototype for Martin’s production version of the Consolidated XPY-1 although production took eventually place under the P3M designation. One XP2M-1 was ordered with serial A-8358 and flew for the first time in June 1931. At a later date the top engine was removed and the aircraft was redesignated as XP2M-2. Refer also to PY, P3M

P3M Martin 120 Specifications: span: 100', 30.48 m length: 61'9", 18.82 m engines: 2 Pratt & Whitney R-1340-48 max. speed: 115 mph, 185 km/h

(Source: US Navy)

A production version of the Consolidated XPY-1, nine aircraft were ordered on 29 June 1929 as P3M-1 of which three were delivered as P3M-1 with serials A-8412/8414 and six as P3M-2 with serials A-8415/8420. The latter had Pratt & Whitney R-1690-32 engines. The three P3M-1s were later also converted as P3M-2. Refer also to PY, P2M

P4M Martin 219 Mercator Specifications: span: 114', 34.75 m length: 84', 25.60 m engines: 2 Pratt & Whitney R-4360-20A + 2 Allison J33-A-10A max. speed: 415 mph, 668 km/h

(Source: US Navy)

The Mercator was a patrol aircraft with mixed propulsion, the two jet engines being installed in the rear of the piston engine nacelles. Two XP4M-1 prototypes were ordered on 6 July 1944 with serials 02789/02790. They were fitted with R-4360-4 and J33-A-17 engines and the first flight was on 20 September 1946. The production version was the P4M-1 of which 19 were built with serials 121451/121454, 122207/122209 and 124362/124373. In 1950 an order was placed for the conversion of all aircraft to P4M-1Q for ECM duties and other reconnaissance duties. The first flight took place in February 1951 and it is likely that 121452 was not converted because it crashed in March 1951. The aircraft, which were withdrawn in 1960, carried often bogus serials, such as 194873.

P5M Martin 237 Marlin Specifications: span: 118', 35.97 m length: 90'8", 27.64 m engines: 2 Wright R-3350-30W max. speed: 262 mph, 422 km/h

(Source: US Navy)

The XP5M-1 prototype of this flying boat was converted from a PBM-5 and was ordered on 26 June 1946 with serial 98616. Initially the development was designated as PBM-6. It flew for the first time on 30 May 1948. This was followed by 160 production P5M-1s with serials 124910/124914, 126490/126511, 127696/127719, 130265/130351 and 135452/135473. A batch with serials 135449/135451 was cancelled. The first flight was on 22 June 1951. The USCG ordered seven aircraft as P5M-1G with serials 1284/1287 and 1295/1297 and these were eventually converted to P5M-1T when they were transferred to the US Navy with serials 149825/149831. In addition a single P5M-1 was converted to this standard. It had serial 135462. 80 P5M-1s were converted for anti-submarine duties and were redesignated as P5M-1S. A single P5M-1 with serial 130286 was fitted with a T-tail, as a prototype of the P5M-2. The P5M-2 version had a redesigned bow and T-tail. The span was 118'2", 36.02m, length 101'1", 30.81m whilst R-3350-32WA engines were fitted. 115 were built with serials 135474/135543, 137846/137848, 140140/140150, 141252/141258, 146440/146445, 147539/147542, 147575/147576 and 147926/147937. Batches with serials 141259/141260 and 147938/147945 were cancelled. The first flight of the P5M-2 was on 29 April 1954. Most of the aircraft, including 137848 and 141258, were later fitted with anti-submarine equipment and redesignated as P5M-2S. The USCG obtained four P5M-2Gs with serials 1312 and 1318/1320. They were later transferred to the US Navy and given serials 149832/149835. On 18 September 1962 those aircraft remaining in service were redesignated as follows: US Navy Tri-service P5M-1 P-5A P5M-1S SP-5A P5M-1T TP-5A P5M-2 P-5B P5M-2S SP-5B The P5M-3 version was a 1956 proposal with 4 Wright R-1820-42 and a single General Electric XJ85. It also carried the designation P7M-1 before being cancelled. Refer also to P7M, PBM, P-5

P6M Martin 275 Seamaster Specifications: span: 102'7", 31.27 m length: 134'4", 40.94 m engines: 4 Allison J71-A-6 max. speed: 723 mph, 1163 km/h

(Source: US Navy)

The Seamaster was a jet engined flying boat. Two XP6M-1 prototypes were ordered on 31 October 1952 with serials 138821/138822. They were fitted with J71-A-4 engines and the first flight was on 14 July 1955. The YP6M-1 was the pre-production version and six were built with serials 143822/143827. The first flight took place on 20 January 1958. On 9 March 1959 the order to stop flying was issued and the last flight was on 18 August 1959. The P6M-2 production version was powered by 4 Pratt & Whitney J75-P-2 engines and 24 aircraft were ordered on 29 August 1956. The order was gradually cut back to 18, then 10 and finally cancelled on 24 August 1959 although by then three aircraft had been delivered. The delivered aircraft had serials 145877/145879, the cancelled aircraft had serials 145876, and 145880/145899. It has been alleged that in 1962 the P-6 designation was applied to the P6M but there is no evidence of this. Refer also to P-6

P7M Martin 313 SubMaster Specifications: span: 136’, 41,45 m length: 111’7”, 34.01 m engines: 4 Wright R-1820-42 + 1 General Electric XJ85 max. speed:

(Source: Martin)

Originally designated as P5M-3, the P7M-1 development was cancelled. A mock-up model was built in 1956. The design used advanced hydrodynamics that would allow it to fly near the sea surface with dipping sonars like those used on ships. The single jet engine was mounted atop the fuselage with exhaust nozzles ducted across the wing surface to cut landing and stall speeds to only 43-48 mph, reducing the danger of impact damage in open-sea landings. Refer also to P5M

PBM Martin 162 Mariner Specifications: span: 118', 35.97 m length: 77'2", 23.52 m engines: 2 Wright R-2600-6 max. speed: 213 mph, 343 km/h

(Source: Jacques Trempe, via 1000aircraftphotos.com photo #2197)

The Mariner was a twin engined flying boat. Initial tests in 1937 used a 1/4 scale model with registration N19168. A single XPBM-1 was order with serial 0796 on 30 June 1937. It made its first flight on 18 February 1939 and was later converted as XPBM-1A for armament tests. The first production version was designated as PBM-1 and was fitted with a dihedral tailplane configuration. 20 were built with serials 1246 and 1248/1266. Aircraft 1247 was completed as the XPBM-2 with an increased fuel capacity and provisions for catapult launching. The PBM-3 version had a length of 80', 24.38m and was fitted with R-2600-12 engines. 379 were ordered from 1 November 1940 but they were delivered as PBM-3B, -3C, -3D, -3R and -3S. The PBM-3B designation referred to six Mariners supplied to the RAF but returned to the US Navy in 1944. 274 examples of the PBM-3C version were delivered with serials 6505/6754 and 01650/01673. The PBM-3D version had R-2600-22 engines and 259 were built with serials 45205/45274, 45277/45404, 48124 and 48164/48223. The PBM-3R was a transport version for 20 passengers of which 50 were built with serials 6455/6504. In addition a number of PBM-3D and -3S aircraft were converted to this standard. 94 of the PBM-3S anti-submarine version were built with serials 01674/01728 and 48125/48163. In addition a number of PBM-3Cs supplied to Australia, were converted to the PBM-3S standard. The latter had serials 6506, 6512, 6522, 6526, 6528, 6538, 6546, 6549, 6565, 6566, 6575 and 6664. The XPBM-3E designation was applied to aircraft 6456 which was a PBM-3 used as a radar development aircraft. The designation was used for the PBM-3C 6693 converted as XPBM-3S. The PBM-4, to be fitted with 2 Wright R-3350-8 engines, was cancelled. Serials allocated were 03563/03742. The XPBM-5 was a prototype fitted with 2 Pratt & Whitney R-2800-34 engines. Two aircraft were ordered with serials 45275/45276 on 3 January 1944. The production version was the PBM-5 which had a length of 79'10", 24.33m and had 2 R-2800-22 engines. A total of 629 were built with serials 45405/45444, 59000/59348, 84590/84789, 85136/85160 and 98602/98616. Batches with serials 98617/99073 and 102276/102575 were cancelled. The XPBM-5A designation was used for aircraft 59349 which was fitted with an amphibious undercarriage. The production version was PBM-5A of which a number were built with serials 122067/122086, 122468/122471 and 122602/122613. In addition 4 PBM-5s with serials 59253/59256 were converted to this standard. The PBM-5E designation was used for a number of aircraft fitted with radar equipment (serials 98602/98605 and 98607/98615) whilst the PBM-5G designation was assigned to a number of PBM-5s transferred to the USCG (incl. serials 59002, 59148, 59158, 84666, 84699, 84728, 84732, 84738 and 84740). A single PBM-5E was converted for missile tests as PBM-5M. It had serial 98606. The PBM-5S designation was used for anti-submarine conversions of the PBM-5. One aircraft, 98612, was converted as PBM-5S2. In Air Pictorial of October 1964 it was reported that surplus PBM-5s were fitted with large floats and used as non-flying dormitory units. The designation PBM-6 was used for the P5M-1 development. One PBM-3D with serials 45274 was completed as XPBM-6. Refer also to P5M

PB2M Martin 170 Mars Specifications: span: 200', 60.96 m length: 117'3", 35.74 m engines: 4 Wright R-3350-18 max. speed: 225 mph, 362 km/h

(Source: Jacques Trempe, via 1000aircraftphotos.com photo #2198)

A single XPB2M-1 prototype was ordered on 23 August 1938 with serial 1520 and flew for the first time on 23 June 1942. The large flying boat had a twin tail configuration and was later converted as XPB2M-1R as a prototype for the JRM-1, under which designation production took place. Refer also to JRM

RM Martin 404 Specifications: span: 93'3", 28.42 m length: 74'7", 22.73 m engines: 2 Pratt & Whitney R-2800-34 max. speed: 312 mph, 502 km/h

(Source: USCG)

Two examples of the Martin 404 transport were acquired by the USCG as RM-1G and with serials 1282/1283. They were later redesignated as RM-1Z and on 18 September 1962 again as VC-3A. Eventually they were transferred to the US Navy as VC-3A with serials 158202 and 158203. Refer also to C-3

SM Martin 63 Specifications: span: 18', 5.49 m length: 18'2", 5.54 m engines: 1 Lawrence L4 max. speed: 103 mph, 166 km/h

(Source: US Navy)

The MS-1 single seat twin float biplane was based on the Cox Klemin XS design and six aircraft were built with an aluminum frame and fabric skinning. The serials were A-6521/6526. Refer also to SX

TM Martin Specifications: span: 71'5", 21.77 m length: 45'8", 13.92 m engines: 2 Liberty max. speed: 109 mph, 175 km/h

(Source: US Navy)

The MT was a torpedo bomber version of the Martin MB.1 and eight were built for the USMC with serials A-5713/5720. They were later redesignated as TM-1. Refer also to NBS

T2M Martin 69 Specifications: span: 56'7", 17.25 m length: 37'9", 11.51 m engines: 1 Wright T-3 max. speed: 103 mph, 166 km/h

(Source: Martin)

The T2M-1 was a torpedo bomber based on the Curtiss CS-2. 40 aircraft were built with serials A-6928/6967 and they are also referred to as SC-2. Refer also to SC

T3M Martin 73 Specifications: span: 56'7", 17.25 m length: 41'4", 12.60 m engines: 1 Wright T-3B max. speed: 109 mph, 175 km/h

(Source: US Navy)

The T3M was the production version of the Curtiss CS-3 design. 24 were ordered as T3M-1 on 12 October 1925 with serials A-7065/7088. The T3M-2 version was fitted with a Packard 3A-2500 engine and 100 were built with serials A-7224/7323. A single T3M-2 (A-7224) was converted with a Pratt & Whitney R-1690 engine and redesignated as XT3M-3. It was later fitted with a Wright R-1750 and further redesignated as XT3M-4. Refer also to SC

T4M Martin 74 Specifications: span: 53', 16.15 m length: 35’7", 10.85 m engines: 1 Pratt & Whitney R-1690-24 max. speed: 114 mph, 183 km/h

(Source: US Navy)

The Martin 74 was a single engined torpedo bomber which Martin inherited from Great Lakes when it took over that plant in October 1928. A single XT4M-1 was ordered with serial A-7566 and flew for the first time in April 1927. The production version was the T4M-1 of which 102 were built with serials A-7596/7649 and A-7852/7899. Refer also to TG

T5M Martin 125 Specifications: span: 41', 12.50 m length: 28'9", 8.76 m engines: 1 Pratt & Whitney R-1690-22 max. speed: 146 mph, 235 km/h

(Source: Martin)

Based on the Bu Aer design 77 and also built as T2N, one XT5M-1 was ordered on 30 June 1938 with serial A-8051. Production took place as BM-1. Refer also to BM, T2N

T6M Martin 118 Specifications: span: 42’3”, 12.88 m length: 33’8”, 10.26 m engines: 1 Pratt & Whitney R-1860 max. speed: 124 mph, 200 km/h

(Source: US Navy)

One XT6M-1 was built in 1930 with serial A-8411.

M = McCulloch (1953-1954)

HUM McCulloch MC4A Specifications: rdm: 22', 6.71 m length: 32'5", 9.88 m engines: 1 Franklin O-335-5 max. speed: 100 mph, 161 km/h

(Source: Pima Air and Space Museum)

Two examples of the MC4A two seat helicopter were procured for evaluation as XHUM-1 and with serials 133817/133818. The first flight took place on 20 March 1951 and after evaluation was completed the two aircraft were redesignated as HUM-1. Refer also to H-30