Miloch wrote in
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https://en.wikipedia.org/wiki/Bell_P-59_Airacomet

The Bell P-59 Airacomet was a twin jet-engined fighter aircraft, the
first of the United States, designed and built by Bell Aircraft during
World War II. The United States Army Air Forces were not impressed by
its performance and cancelled the contract when fewer than half of the
aircraft ordered had been produced. Although no P-59s entered combat,
the fighter paved the way for another design generation of U.S.
turbojet-powered aircraft, and was the first turbojet fighter to have
its turbojet engine and air inlet nacelles integrated within the main
fuselage.

Major General Henry H. "Hap" Arnold became aware of the United
Kingdom's jet program when he attended a demonstration of the Gloster
E.28/39 in April 1941. The subject had been mentioned, but not in
depth, as part of the Tizard Mission the previous year. He requested,
and was given, the plans for the aircraft's powerplant, the Power Jets
W.1, which he took back to the U.S. He also arranged for an example of
the engine, the Whittle W.1X turbojet, to be flown to the U.S in
October 1941 in the bomb bay of a USAAC Consolidated B-24 Liberator,
along with drawings for the more powerful W.2B/23 engine and a small
team of Power Jets engineers. On 4 September, he offered the U.S.
company General Electric a contract to produce an American version of
the engine, which subsequently became the General Electric I-A. On the
following day, he approached Lawrence Dale Bell, head of Bell Aircraft
Corporation, to build a fighter to utilize it. Bell agreed and set to
work on producing three prototypes. As a disinformation tactic, the
USAAF gave the project the designation "P-59A", to suggest it was a
development of the unrelated Bell XP-59 fighter project which had been
canceled. The design was finalized on 9 January 1942, and construction
began. In March, long before the prototypes were completed, an order
for 13 "YP-59A" preproduction machines was added to the contract.

On 12 September 1942, the first XP-59A was sent to Muroc Army Air
Field (today, Edwards Air Force Base) in California by train for
testing, taking seven days to reach Muroc. While being handled on the
ground, the aircraft was fitted with a dummy propeller to disguise its
true nature. The aircraft first became airborne during high-speed
taxiing tests on 1 October with Bell test pilot Robert Stanley at the
controls, although the first official flight was made by Col Laurence
Craigie the next day. A handful of the first Airacomets had open-air
flight observer stations (similar to those of biplanes) later cut into
the nose; over the following months, tests on the three XP-59As
revealed a multitude of problems including poor engine response and
reliability (common shortcomings of all early turbojets), insufficient
lateral stability, i.e., in the roll axis, and performance that was
far below expectations. Chuck Yeager flew the aircraft and was
dissatisfied with its speed, but was amazed at its smooth flying
characteristics. Nevertheless, even before delivery of the YP-59As in
June 1943, the USAAF ordered 80 production machines, designated "P-59A
Airacomet".


Role
Fighter

National origin
United States

Manufacturer
Bell Aircraft

First flight
1 October 1942

Primary users
United States Army Air Forces
United States Navy
Royal Air Force

Number built
66

The 13 service test YP-59As had a more powerful engine than their
predecessor, the General Electric J31, but the improvement in
performance was negligible, with top speed increased by only 5 mph and
a reduction in the time they could be used before an overhaul was
needed. One of these aircraft, the third YP-59A (S/n: 42-22611) was
supplied to the Royal Air Force (receiving British serial RG362/G), in
exchange for the first production Gloster Meteor I, EE210/G. British
pilots found that the aircraft compared very unfavorably with the jets
that they were already flying. (The YP-59A also compared unfavorably
with the propeller-driven North American P-51 Mustang.) Two YP-59A
Airacomets (42-108778 and 42-100779) were also delivered to the U.S.
Navy where they were evaluated as the "YF2L-1" but were quickly found
completely unsuitable for carrier operations.

Faced with their own ongoing difficulties, Bell eventually completed
50 production Airacomets, 20 P-59As and 30 P-59Bs. Each was armed with
one 37 mm M4 cannon and 44 rounds of ammunition and three .50 cal
(12.7 mm) machine guns with 200 rounds per gun. The P-59Bs were
assigned to the 412th Fighter Group to familiarize AAF pilots with the
handling and performance characteristics of jet aircraft. By 1950, all
examples of the Airacomet were no longer airworthy. Over time,
disposal of the aircraft included use as static displays,
instructional aids in military training, and as static targets. While
the P-59 was not a great success, the type did give the USAAF
experience with the operation of jet aircraft, in preparation for the
more advanced types that would shortly become available.

Specifications (P-59B)

General characteristics
Crew: one
Length: 38 ft 10 in (11.84 m)
Wingspan: 45 ft 6 in (13.87 m)
Height: 12 ft 4 in (3.76 m)
Wing area: 386 sq?ft (35.86 m²)
Empty weight: 8,165 lb (3,704 kg)
Loaded weight: 11,040 lb (5,008 kg)
Max. takeoff weight: 13,700 lb (6,214 kg)
Powerplant: 2 × General Electric J31-GE-5 turbojets, 2,000 lbf (8.9
kN) each

Performance
Maximum speed: 413 mph (359 knots, 665 km/h) at 30,000 ft (9,140 m)
Cruise speed: 375 mph (326 knots, 604 km/h)
Range: 375 mi (326 nm, 604 km)
Service ceiling: 46,200 ft (14,080 m)
Climb to 30,000 ft (9,140 m): 15 min 30 s

Armament

Guns:
1x 37 mm cannon
3x .50 cal (12.7 mm) machine guns

Rockets: 8× 60 lb (30 kg) rockets
Bombs: 2,000 lb (910 kg) bombs





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some ended up as targets, photos of one at Aberdeen proving grounds
and one 42-108783 served as a drone controller with a second seat in the
nose (open cockpit) and later served as a ground target at Edwards.