Paper Model - Models By Marek 3 - f4U-1A Corsair.pdf - Model kartonowy - Marek Pacynski (Model Cardboard) - jchudzinski

F4U-1 „Corsair”

flown by Lt. Cmdr. John T. Blackburn,

USN (11 kils) VF-17 Ondonga

New Georgia Island

November 1943

Vought F4U-1 Corsair

often unhealthy, both for people and aircraft, and standards of living

were primitive. Missions often involved long overwater flights. The island

group of the Eastern Solomons, for example, extends over more than 621

miles (1000 km).

The first USMC unit to equip with the F4U was VMF-124, which

was declared operational on 28 December 1942. VMF-124 was quickly

deployed to Guadalcanal, where it flew its first combat mission, also the first

of the F4U, on 11 February 1943. Fighting over Guadalcanal was intense.

The first air-to-air combat took place on the 14th, when a mixed force of P-

38s, P-40s, PB4Ys and F4Us lost ten aircraft to the Japanese, and claimed

four A6M "Zero" fighters.

As on this first mission, the aircraft involved in an operation were

often of different types, belonged to different services, and belonged to

different bases. The coordination between them was not always what it

should have been.

Within six months, all USMC units in the Pacific were equipped

with the F4U. The production was extremely rapid, and by August 1934 a

thousand aircraft had been delivered. Final production of the F4U-1 was

5559, including the 2010 FG-1s built by Goodyear and 735 F3A-1s built by

Brewster.

US Navy

Despite the decision to issue the F4U to Marine Corps units, VF-12

(October 1942) and later VF-17 (April 1943) were equipped with the F4U.

By April 1943 VF-12 had succesfully completed deck landing qualification.

However, VF-12 soon abandoned its aircraft to the USMC, while VF-17

operated as a shore-based unit in New Georgia. In November 1943 the land-

based VF-17 ran out of fuel while giving top cover to the carriers USS Essex

and USS Bunker Hill. The aircraft then landed on the carriers, without

incidents.

The US Navy finally accepted the F4U for shipboard operations in

April 1944, after the longer oleo leg was fitted, which finally eliminated the

tendency to bounce. The first Corsair unit to be based effectively on a carrier

was the pioneer USMC squadron, VMF-124, which joined the USS Essex.

They were accompanied by VMF-213. The increasing need for fighters, as a

protection against Kamikaze attacks, resulted in more Corsair units being

moved to the carriers. The Navy squadrons VF-12, VF-17 and VF-301 also

soon operated from carriers.

At the end of June 1941 the US Navy ordered 584 F4U-1 fighters.

The first of these would appear a year later, in June 1942. At that time

Brewster and Goodyear were already tooling up to join the Corsair

production program.

For the production F4U, the US Navy required some changes, which

were logical in itself but had unfortunate side effects. More armour was

carried for the pilot and oil tank, which added 68kg to the weight. The

armament was changed to six .50 machine guns, three in each wing. The

wing bomb bays were deleted. This increase in firepower was needed, but

the wing guns displaced the leading edge fuel tanks. To restore an adequate

fuel capacity, an additional fuel tank had to be installed in the fuselage.

Because it had to be near the center of gravity, there was no other option than

moving the cockpit to the rear. The 897 liter self-sealing fuel tank pushed to

cockpit 0.91 meter closer to the tail. Forward view over the engine cowling,

already poor in the prototype, was now decidedly bad. This was especially a

problem during take-off and landing, because the F4U, like most fighters of

its generation, was a tail-dragger. On the other hand, rearward vision was

improved a bit by making cutouts in the rear fuselage decking. Vision to the

sides and downwards was excellent.

The ailerons were enlarged, the cockpit canopy was made

jettisonable, an IFF transponder was fitted, and the tailwheel design

changed. The engine of production aircraft was the R-2800-8, rated for 2000

hp (1491 kw) at an rpm of 2700 for take-off. It had a mechanical two-stage,

two-speed supercharger. When all changes were incorporated, the gross

weight had increased considerably. The XF4U-1 had weighed 9358 lbs

(4244 kg), but the F4U-1 12,696 lbs (5758 kg).

The performance of the F4U was impressive. Below is a comparison

with the two other fighters which were powered by the R-2800. The F4U

was considerably faster than the competing F6F Hellcat. It was slower than

the P-47 Thunderbolt, but the latter achieved it highest speed at 30,020 ft

(9150 m) with the help of a turbocharger. The F4U had a mechanically

supercharged engine. The first production F4U-1 made its first flight on 25

June 1942. The USN received its first aircraft on 31 July.

Overall handling of the F4U-1 was acceptable, but not very good. In

level flight the Corsair was stable enough to be flown hands-off. The

ailerons were light and effective, and the high roll rate was used with good

effect in combat with the A6M, which suffered from bad aileron response at

high speeds. The elevators were heavy, but effective. Only the rudder really

stiffened with increasing speed. For combat maneuvering, the flaps could be

deployed 20 degrees.

After the first delivery of an F4U-1 on 31 July 1942, more than two

years passed before the US Navy cleared the type for shipboard operations.

The Corsair was found to be much too difficult to land on a carrier deck. First

of all, the pilot could hardly see the deck, because he sat so far aft of the

bulky engine. The F4U tended to stall without warning, and was then certain

to drop the starboard wing. Quick action had to be taken to prevent a spin.

Spin recovery was difficult. In landing configuration, the F4U-1 would stall

at 87 mph (141 km/h). A warning light would light at 92 mph (148 km/h). On

touchdown, the F4U-1 had sluggish controls and insufficient directional

stability. It also was prone to "bounce" because of overly stiff landing gear

oleo legs.

These characteristics had already been there on the XF4U-1, and if

anything they were worse on the production type. Carrier qualification trials

on the escort carrier USS Sangamon Bay, on 25 September 1942, caused the

US Navy to release the type to the US Marine Corps. After all, the US Navy

still had the Grumman F6F Hellcat, which did not have the performance of

the F4U but was a far better deck landing aircraft. The Marines needed a

better fighter than the F4F Wildcat. For them it was important that the F4U

could be put on a carrier, but they usually flew from land bases.

The Marines

During the Pacific war, the strategy of "island hopping" turned

islands into forward operating bases for the aircraft of the US Marine Corps,

the US Navy and the Army Air Force. Essential to this strategy was that no

attempt was made to conquer all Japanese strongholds in the Pacific.

Instead, they were neutralized by attacks, cut off from the main Japanese

forces, and left behind.

The islands from which the advanced units operated were often very

small. If they were larger, they were often covered with a dense jungle, and

only a small part of the island was used by the combattants. The climate was

Engine .................................................Pratt & Whitney

R-2800-8

2000hp

Wing Span...........................................12.49m

Wing Area ...........................................29.17m2

Length .................................................9.99m

Height..................................................4.58m

Weights:...............................................

Empty ..................................................4025kg

Loaded.................................................5388kg

Max .....................................................6280kg

Speed ...................................................631km/h at 7315m

515km/h at S/L

Climb...................................................3050m in 5.1min

6100m in 10.7min

Ceiling .................................................11310m

Range...................................................1722km

Armament............................................Four .50 M2 with 400

rpg

Two .50 M2 with 375 rpg

Two 454kg bombs

19a

52A

54A

53A

52A

52A

18a

64c

64b

64d

64a

64e

64c

64b

Paper Model - Models By Marek 3 - f4U-1A Corsair.pdf

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