Why Tejas Mk1A Should Consider EuroJet EJ200 or Snecma M88 Engine Amidst GE Delays

While the Light Combat Aircraft (LCA) Tejas Mk1A program isn't actively seeking a new engine to replace the current GE F-404, potential delays or future considerations might warrant evaluating alternative options.

Two Western engines stand out as potential contenders: the EuroJet EJ200 and the Snecma M88. Let's compare them based on key performance metrics crucial for a light combat aircraft.

Performance Showdown​

• Thrust-to-Weight Ratio (TWR): The M88 holds a slight advantage with a TWR of 8.40:1 compared to the EJ200's 9.17:1, potentially translating to slightly faster initial acceleration.
• Thrust-to-Drag Ratio (TDR): The EJ200 boasts a superior TDR of 23.13 N/cm2 compared to the M88's 19.42 N/cm2, leading to better fuel efficiency and overall performance.
• Fuel Consumption: The M88-2 emerges as the more fuel-efficient option in both dry thrust and afterburner modes, which could extend operational ranges and reduce costs.
• Bypass Ratio: Both engines have low bypass ratios favoring supercruise capability. However, the EJ200's slightly higher ratio might offer a slight edge in maneuverability at lower speeds.
• Maintainability: The EJ200 excels with fewer compressor stages and a modular design, promising easier and potentially cheaper maintenance.
• Infrared Signature: While the EJ200 has a slightly lower inlet temperature, the M88 incorporates additional cooling channels and nozzle designs to minimize its IR signature, potentially offering a tactical advantage by reducing detection.

Wet Thrust Comparison​

• The EJ200 offers a wet thrust of 90kN, surpassing the GE F404's 84kN.
• The M88's wet thrust of 75kN falls short of both the GE F404 and even the older F-404 engines used in earlier prototypes, generating 78kN.

Choosing the Right Fit​

The ideal choice hinges on priorities. The EJ200 excels in peak fuel efficiency, maintainability, higher thrust-to-drag ratio, and a superior thrust-to-weight ratio. The M88-2 shines with its potentially lower IR signature and decent fuel efficiency.

Ultimately, if fuel efficiency and a reduced IR signature are paramount, the M88-2 remains a strong contender. However, if the focus is on enhanced thrust-to-drag and thrust-to-weight ratios, coupled with ease of maintenance and reliability, the EJ200 emerges as the clear frontrunner.

 

[Dr. Saptarishi Chatterjee]

The Tejas is literally dead. We have lost the crucial time, now when countries like Turkey, South Korea, Japan, EU all have started the 5th Gen Aircraft programme and our Neighbor China and Pakistan are either having or procuring these platforms, the time if, Tejas come with any form of engine it will be too late. AMCA and Tejas MK2 are dead before birth so don't talk about those...🙏🙏

 

[AK S]

kaveri engine has to reduce weight First

Actually a lot is needed. It will take years and a billion or even more.

 

[tejSOG]

EJ 200 needs certification and modifications in air intake because EJ 200 needs 75-77 kgs of air while F 404 need 65-68 kgs next M 88 aren't considered because of it's lack of power required. Tejas Mk-1 A needs 80-90 kn class not 70 Kn class. Both engines are not certified for single engine jets

 

[tejSOG]

EJ 200 and M 88 are not single engine certified. Tejas mk 1 a needs further intake modifications in case of EJ 200 as it needs 75-77 kgs of air while F 404 need 65-67 kgs M 88 can Fit but it lacks power Tejas needs 80-90 KN class not 70-80 KN