The power plant TF4 1-A-2 afterburner turbofan engine has a maximum thrust of 66.64 kN.
Main airborne equipment AN/ASN-9 1(V) navigation/weapon dropping computer; An /APN- 190(V) Doppler radar and An /AYQ-7(V) head-up display, etc.
An M61A120mm machine gun was used as a weapon, and it was equipped with 1000 rounds of ammunition. Eight weapon racks can be used to hang various missiles, televisions and laser-guided weapons. The maximum bomb load is 6800 kg.
According to the size data, the wingspan 1 1.80m and 7.24m (outer wing folded), the length 14.06m, the aircraft height 4.90m, the wing area 34.83m2 and the wing sweep angle (1/4 chord length) 35.
The empty weight of the weight data is 8680 kg, and the normal takeoff weight is 13320 kg. The fuel quantity (in the aircraft) is 4200 kg, and the maximum takeoff weight is 19050 kg.
The performance data show that the maximum horizontal flight speed is M0.94/ 1049 km/h, the cruising speed is M0.72 ~ 0.80/h, the service ceiling is 14780 m, the activity radius is 600 km, and the transition range is 6243 km.
A-7 pirate family
A-7A This machine is the first formal production model of A-7 series. The early pre-production/operational test A-7A was tested on land in Dallas and Maryland, and the initial test on the aircraft carrier was carried out on CAV-66 in June 1966 165438. The formal production and testing of A-7A began at the same time. There are some differences between A-7A and YA-7A. The most notable difference in armament is that the YA-7A has no built-in weapon, while the A-7A has two MK- 12 20mm machine guns on its nose. The power system of A-7A is Pratt & Whitney TF-30-P-6 afterburner turbofan jet engine. The A-7A has an empty weight of 6820kg, the maximum takeoff weight14,740kg, the maximum designed weapon mounting capacity (only 8 attachment points on the wing of the computer) of 6804kg, and the internal fuel tank can hold 4630kg of fuel. After mounting four 300-gallon auxiliary fuel tanks, the cruising range of the A-7A can reach 4,600 kilometers. A-7A*** produced 199 aircraft, all equipped with US naval aviation.
A-7B When A-7A was fully produced, Walter Company received a contract from the Navy. The Navy requires the development of Type A modification, and is ready to number the new aircraft A-7B. In fact, the main improvement of Bucket 7B and A-7A is the replacement of TF-30-P-8 jet engine. After the replacement and modification, the empty weight of the aircraft increased by 594 kg, mainly due to the strengthening of the wing structure, which increased the weapon mounting capacity of the aircraft (the maximum mounting weight of Type A increased from 6,804 kg to 9,070 kg). Other changes worth mentioning are that the B-type aircraft is equipped with a 16 mm camera gun to evaluate the damage effect. The A-7B produced in the later stage was replaced with a more advanced TF-30-P-408 engine, and the thrust was further increased. A-7B successfully made its first flight on February 6th 1968, and this first flight was made by the third A-7B instead of the first A-7B. By the time the last A-7B was delivered on May 7, 1969, Walter had produced 196 B-type aircraft for the Navy.
The serial number of the model A-7C is worth mentioning. According to the scheduled plan, Walter will develop a two-seat trainer based on A-7A, and the Navy has reserved the number A-7c for this coach A-7. However, the development progress of coaching is far behind expectations. At the same time, according to the original plan of the Navy, the first batch of 67 A-7Es will be put into service soon after modification-however, due to the fact that the original planned engines (TF-4 1 jointly produced by Allison/Rolls-Royce) A-7e not in place, these aircraft have to be temporarily installed with A-7B engines. In this way, these A-7Es overlap with A-7B and A-7E which are not suitable to be named as new models. In view of the delay of the coach plan and the delay of the A-7E engine, the Navy handed over the serial number of the A-7C to these "A-7Es" which were subsequently modified again. A-7c is modified on the basis of the later production model of A-7B. Compared with A-7B, the change is that the MK- 12 gun at the nose is replaced by the more advanced M-6 1A 1 "gatling" gun, and the original reflective gun sight is replaced by AN/AVQ-7 head-up display. The engine of A-7C was originally TF-30-P-408, and later it was replaced by Rolls-Royce TF-4 1-A-2 turbofan engine with greater thrust.
A-7D is one of the most important modifications in the development of A-7. In view of the actual experience in Vietnam War, the US Air Force found that it needed a special support attack aircraft to replace the aging A- 1 and the poor performance F- 100. After the possibility of converting Northrop N- 156F into a new model was ruled out,1October 5, 1965 165438, the Air Force announced that it planned to purchase an A-7 modified aircraft as its own ground attack aircraft, with the aircraft number A-7D. 1In March, 968, the first two A-7D prototypes completed the airframe construction. Due to problems in the scheduled engine development plan, the delivery was delayed. On the 6th of the following month, when A-7D made its first flight, the engine installed for A-7A was TF-30-P-6, and the first A-7D with Allison/Rolls-Royce TF-4 1-A- 1 engine made its first flight on September 26th. By the time of the final delivery in 1975, Walter had manufactured seven batches of 459 A-7Ds for the Air Force.
Another main difference between A-7D and A-7A is that A-7D is equipped with more advanced avionics, which has realized avionics integration to some extent. 1977, the air force improved the active A-7D again, mainly replacing the automatic air combat flap and adding the laser target indication system of "Paver". With the update of power system and avionics system, the combat effectiveness of A-7D has completely changed compared with that of A-type aircraft, which shows that the effectiveness of D-type aircraft in ground attack capability is more than twice that of A-type aircraft. Due to this series of improvements, the empty weight of the aircraft has increased to 9033 kg, and the maximum takeoff weight has also increased to 19050 kg.
A-7E This machine is an important modification of A-7 series A-7D with the same technical level. The air force's D-plane is equipped with advanced power and avionics system, which greatly stimulates the navy and makes it feel the backwardness of its A-7A and A-7B. To this end, the navy proposed to develop new modifications and install engines and avionics systems similar to the D-type. The number of this new plane is A-7E. The first A-7E (power system TF-4 1) made its first flight on1October 25th 1968 165438+. As of 1977, Navy I * * has received 529 A-7Es.
YA-7F (also known as A-7D+) 1985 In view of the slow flight speed of A- 10 in actual use, the US Air Force proposed to develop a new type of ground attack aircraft powered by Pratt & Whitney F-10 engine or General Electric F-10 engine. Walter responded by reactivating A-7D, which was lost to A- 13 three years ago, as the female parent of the new machine. The new A-7 is named YA-7F, the engine is F- 100-PW-200, the afterburning thrust is 1.7 kN, and it has supersonic flight capability. In order to adapt to the larger engine, the fuselage of the original A-7D was lengthened by1.22m, and the wing was redesigned, which enhanced the bearing capacity and improved the maneuverability/maneuverability.