Major Shaitan Singh
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INTRODUCTION
The F-14 Tomcat is the most well-known aircraft ever operated by the US Navy. Its sleek design and swing wings made it the ultimate cool fighter of its generation. Last month, I tracked the Origin and Evolution of the Su-27 in detail. Here, I will track the origin of the F-14 Tomcat, its development, the hurdles it faced during the Cold War and how it evolved into one of the most iconic fighters of its era.
ORIGINS
It was 1960, and the Soviets were developing a family of long range cruise missiles which could be launched from ships, submarines and aircraft. These missiles flew quickly and at low altitudes which made them ideal for targeting US Navy carriers. A sufficiently large number of these missiles could overwhelm the most advanced air defenses of that time. The US navy also lacked a long range fighter with a sufficiently large weapon load to intercept and destroy Soviet missiles and aircraft before they got too close to the carrier group. This made them realize the need for a fighter which can fly hundreds of km from the carrier and intercept Soviet bombers and missiles before it was too late.
The F-111B which was rejected in favor of a new design
In 1962, the existing long range F-111 of the USAF, re-designated as the F-111B was evaluated to be a possible naval fighter to fulfil this role due to its long range and heavy weapons load. But it was just too heavy at over 85,000 pounds to be a naval fighter. It was too clumsy as a fighter and its test flights failed, killing several pilots. Hence it was canceled in 1968 and the US Navy proceeded to obtain a specifically designed new fighter for their carriers. So in 1968, Grumman won the tender to build a next-generation air superiority fighter for the US Navy. It was required to fly at speeds greater than Mach 2.2, have excellent agility and be able to perform secondary strike roles. It would deploy the AIM-154 Phoenix ultra-long range Air to Air missile in conjunction with the long range AWG-9 radar.
The wind tunnel model of the F-14
Design 303E was finally selected
Grumman engineers tested hundreds of wind tunnel models in various configurations and finally the model which was chosen had a swing wing and twin turbojet engines. The unique feature of these turbojets was that each of the 20,000 pound thrust producing engines were separated by several feet physically. This proved to be an ideal layout as the space between the engines under the fuselage was employed for carrying the massive AIM-154 Phoenix missile and 2000 lb. bombs. This design required a tall tail stabilizer which would hamper movement in the hangars of aircraft carriers. So Grumman opted for a twin tail configuration which allowed the use of short tail stabilizers. Unlike the side by side seating used by the pilot and the radar intercept officer in the F-111, the F-14 featured tandem seating for its 2 man crew which resulted in further streamlining of the aircraft. The final design chosen was the Design 303E which is shown below.
The large amount of space between the engines is visible
The one feature which made the Tomcat so popular was its unique swing wing design. All the swing wing fighters of that era required the pilot to manually adjust the degree of sweep of the wings. But for the F-14, Grumman engineers decided to install an automatic swing wing system which would collect airspeed data from external sensors and adjust the degree of sweep accordingly. This freed up the pilot from an unnecessary task and allowed him to concentrate on flying the aircraft. The swept wing was however not for show, and it performed a very important aerodynamic function. When swept fully forward, it provided maximum surface area of wings necessary to generate lift during takeoff. This was very essentially as the F-14 was the heaviest US Navy fighter to be operated from carriers and the additional lift generated by forward swept wings would greatly aid in takeoff. Forward swept wings were also essential during landings. The wings automatically swept back fully as the F-14 approached supersonic speeds. This helped to reduce drag greatly and gave the Tomcat its iconic look.
F-14 with its wings fully extended during landing
The F-14 needed to be light enough for carrier takeoff, yet strong enough to land on a carrier (which is basically a controlled crash). So it needed to be made from a combination of materials which would impart strength, corrosion resistance, carry a huge payload and be light enough at the same time. Hence one of the main materials used was Titanium along with aluminum. This enables it to be 40,000 pounds lighter than the F-111B which made it ideal for carrier ops. The maximum weight of the F-14 when fully loaded with fuel and weapons exceeded 70,000 pounds, making it the heaviest carrier-borne fighter of its time.
A peek inside the F-14s massive engine
The Navy wanted a working prototype within 2 years of the project commencement and announced massive penalties which Grumman had to pay if the Navy requirements were not met in time. Here are the list of penalties I obtained from the F-14 Tomcats association, which would be imposed if parameters were not met.
The F-14 prototype during its first flight
The F-14 Tomcat is the most well-known aircraft ever operated by the US Navy. Its sleek design and swing wings made it the ultimate cool fighter of its generation. Last month, I tracked the Origin and Evolution of the Su-27 in detail. Here, I will track the origin of the F-14 Tomcat, its development, the hurdles it faced during the Cold War and how it evolved into one of the most iconic fighters of its era.
ORIGINS
It was 1960, and the Soviets were developing a family of long range cruise missiles which could be launched from ships, submarines and aircraft. These missiles flew quickly and at low altitudes which made them ideal for targeting US Navy carriers. A sufficiently large number of these missiles could overwhelm the most advanced air defenses of that time. The US navy also lacked a long range fighter with a sufficiently large weapon load to intercept and destroy Soviet missiles and aircraft before they got too close to the carrier group. This made them realize the need for a fighter which can fly hundreds of km from the carrier and intercept Soviet bombers and missiles before it was too late.
The F-111B which was rejected in favor of a new design
In 1962, the existing long range F-111 of the USAF, re-designated as the F-111B was evaluated to be a possible naval fighter to fulfil this role due to its long range and heavy weapons load. But it was just too heavy at over 85,000 pounds to be a naval fighter. It was too clumsy as a fighter and its test flights failed, killing several pilots. Hence it was canceled in 1968 and the US Navy proceeded to obtain a specifically designed new fighter for their carriers. So in 1968, Grumman won the tender to build a next-generation air superiority fighter for the US Navy. It was required to fly at speeds greater than Mach 2.2, have excellent agility and be able to perform secondary strike roles. It would deploy the AIM-154 Phoenix ultra-long range Air to Air missile in conjunction with the long range AWG-9 radar.
The wind tunnel model of the F-14
Design 303E was finally selected
Grumman engineers tested hundreds of wind tunnel models in various configurations and finally the model which was chosen had a swing wing and twin turbojet engines. The unique feature of these turbojets was that each of the 20,000 pound thrust producing engines were separated by several feet physically. This proved to be an ideal layout as the space between the engines under the fuselage was employed for carrying the massive AIM-154 Phoenix missile and 2000 lb. bombs. This design required a tall tail stabilizer which would hamper movement in the hangars of aircraft carriers. So Grumman opted for a twin tail configuration which allowed the use of short tail stabilizers. Unlike the side by side seating used by the pilot and the radar intercept officer in the F-111, the F-14 featured tandem seating for its 2 man crew which resulted in further streamlining of the aircraft. The final design chosen was the Design 303E which is shown below.
The large amount of space between the engines is visible
The one feature which made the Tomcat so popular was its unique swing wing design. All the swing wing fighters of that era required the pilot to manually adjust the degree of sweep of the wings. But for the F-14, Grumman engineers decided to install an automatic swing wing system which would collect airspeed data from external sensors and adjust the degree of sweep accordingly. This freed up the pilot from an unnecessary task and allowed him to concentrate on flying the aircraft. The swept wing was however not for show, and it performed a very important aerodynamic function. When swept fully forward, it provided maximum surface area of wings necessary to generate lift during takeoff. This was very essentially as the F-14 was the heaviest US Navy fighter to be operated from carriers and the additional lift generated by forward swept wings would greatly aid in takeoff. Forward swept wings were also essential during landings. The wings automatically swept back fully as the F-14 approached supersonic speeds. This helped to reduce drag greatly and gave the Tomcat its iconic look.
F-14 with its wings fully extended during landing
The F-14 needed to be light enough for carrier takeoff, yet strong enough to land on a carrier (which is basically a controlled crash). So it needed to be made from a combination of materials which would impart strength, corrosion resistance, carry a huge payload and be light enough at the same time. Hence one of the main materials used was Titanium along with aluminum. This enables it to be 40,000 pounds lighter than the F-111B which made it ideal for carrier ops. The maximum weight of the F-14 when fully loaded with fuel and weapons exceeded 70,000 pounds, making it the heaviest carrier-borne fighter of its time.
A peek inside the F-14s massive engine
The Navy wanted a working prototype within 2 years of the project commencement and announced massive penalties which Grumman had to pay if the Navy requirements were not met in time. Here are the list of penalties I obtained from the F-14 Tomcats association, which would be imposed if parameters were not met.
- Empty Weight: $440,000 for each 100 lbs overweight
- Acceleration: $440,000 for each second slow
- Escort Radius: $1 million for each 10 nautical miles short
- Approach Speed: $1.056 million for each knot fast
- Maintainability: $450,000 for each extra maintenance man-hour per flight hour
- Delivery to Navy Board of Inspection and Survey: $5,000 for each day late
The F-14 prototype during its first flight
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