| Type | Flying boat | |
| Company | Glenn L. Martin Company | |
| Scheme | Monoplane High wing | |
| Geometry | ||
|---|---|---|
| Length (m) |
1.9
35.7
88.7
|
|
| Height (m) |
0.6
11.7
50.1
|
afloat |
| Width (m) |
1.9
4.1
7.7
|
Hull beam |
| Wings | ||
| Wing area (m2) |
1.1
342.4
925
|
|
| Wingspan (Beam) (m) |
0.1
61.0
95
|
|
| Weights | ||
| Empty weight (kg) |
8
34,279.3
276,800
|
|
| Max. takeoff weight (Gross weight) (kg) |
154
74,842.7
575,000
|
|
| Loaded weight (kg) |
5
40,823.3
242,500
|
|
| Capacity | ||
| Crew (per.) |
1
4
112
|
with accommodations for a second relief crew |
| Payload (kg) |
23
14,515.0
122,470
|
|
| Capacity passengers (per.) |
1
133
400
|
|
| Speeds | ||
| Max. Speed (km/h) |
25
355.7
28,165
|
|
| Сruise Speed (km/h) |
52
305.8
3,087
|
|
| Fuel | ||
| Fuel Capacity (l) |
23
24,548.3
320,000
|
or 50000 depending on variant |
| Power | ||
| Total Power (hp) |
0.4
10,000
60,000
|
4 powerplants 2500 hp each |
| Performance | ||
| Service ceiling (m) |
0.6
4,450
161,544
|
|
| Range (Ferry range) (km) |
4
7,958
40,700
|
|
| Propellers | ||
| Propellers (qt) |
1
4
8
|
|
| Prop diameter (m) |
1.8
4.6
5.8
|
|
| Prop blade number (qt) |
1
4
8
|
|
| Stat | ||
| Number built (qt) |
0
7
43,000
|
|
| Introduction | 1942 | |
| First flight | 23.06.1942 | |
| Stop production | 1956 | |
