B25J Mitchell

No tax

Wingspan: 1.72 m

Flight Video

The really first 3d printable bomber plane. This even bigger evolution including some revolutionary features. For the second time this model uses new method of joining parts, really, now on most of parts – stronger, easier to assemble and more precise.

This plane can be recommended to medium skilled pilots.

My Airplane Configuration
Main Color (Used Most)
Add-In Color (Used Less)

The North American B-25 Mitchell is a medium bomber that was introduced in 1941 and named in honor of Major General William „Billy“ Mitchell, a pioneer of U.S. military aviation.

Used by many Allied air forces, the B-25 served in every theater of World War II, and after the war ended, many remained in service, operating across four decades. Produced in numerous variants, nearly 10,000 B-25s were built. These included a few limited models such as the F-10 reconnaissance aircraft, the AT-24 crew trainers, and the United States Marine Corps‘ PBJ-1 patrol bomber.

The Air Corps issued a circular (number 38-385) in March 1938 describing the performance they required from the next bombers — a payload of 540 kg with a range of 1,900 km at more than 320 km/). Those performance specifications led NAA[4] to submit their NA-40 design. The NA-40 had benefited from the North American XB-21 (NA39) of 1936, which was the company‘s partly successful design for an earlier medium bomber that had been initially accepted and ordered, but then cancelled. However, the company‘s experience from the XB-21 contributed to the design and development of the NA-40. The single NA-40 built flew first at the end of January 1939. It went through several modifications to correct problems. These improvements included fitting 1,193 kW Wright R-2600 „Twin Cyclone“ radial engines, in March 1939, which solved the lack of power.

In March 1939, North American delivered the substantially redesigned and improved NA40 (as NA-40B) to the United States Army Air Corps for evaluation. It was in competition with other manufacturers‘ designs (Douglas 7B, Stearman X-100, and the Martin Model 167F) [5] but failed to win orders. The aircraft was originally intended to be an attack bomber for export to the United Kingdom and France, both of which had a pressing requirement for such aircraft in the early stages of World War II. However, the French had already opted for a revised Douglas 7B (as the DB-7). Unfortunately, the NA-40B was destroyed in a crash on 11 April 1939 while undergoing testing. Although the crash was not considered due to a fault with the aircraft design, the Army ordered the DB-7 as the A-20. The Air Corps issued a specification for a medium bomber in March 1939 that was capable of carrying a payload of 1,100 kg over 1,900 km at 480 km/h NAA used the NA-40B design to develop the NA-62, which competed for the medium bomber contract. No YB-25 was available for prototype service tests. In September 1939, the Air Corps ordered the NA-62 into production as the B-25, along with the other new Air Corps medium bomber, the Martin B-26 Marauder „off the drawing board“.

Interior of huge aircraft factory where rows of bombers are being assembled North American B-25 Mitchell production in Kansas City in 1942

Data sheet

1360 mm
1720 mm
400 mm
Wing Area
43 dm2
Wing Loading
83 g / Dm2
Center of Gravity
83 mm from LE
Printed Weight
1980 g
Takeoff Weight (with batt)
3600 g
Max Takeoff Weight
4200 g
Never Exceed Speed (VNE)
120 km/H
Design Maneuvere Speed (VA)
75 km/H
Stall Speed VS (full flaps)
32 km/H
2 x 11x4.5 Set (Cw & Ccw)
2 x 3542 1000 kv
2 x 40 Amp
4S 5000 mah
Max Speed VH (level flight)
110 km/H
Rate of Climb
21 m/S