1. What is Launch Performance?

Launch performance, measured in g-forces (g), is the ratio of thrust to weight of a rocket or vehicle during launch. It indicates the acceleration capability of the vehicle relative to Earth's gravity.

2. How Does the Calculator Work?

The calculator uses the performance equation:

Where:

• \( Thrust \) — Total thrust force (Newtons)
• \( Weight \) — Vehicle weight (kilograms)

Explanation: The equation calculates how many times the thrust exceeds the vehicle's weight, which directly relates to the acceleration the vehicle can achieve.

3. Importance of Performance Calculation

Details: Launch performance is crucial for determining if a vehicle can overcome gravity, achieve orbit, or reach desired velocities. It affects payload capacity and mission design.

4. Using the Calculator

Tips: Enter thrust in Newtons and weight in kilograms. Both values must be positive numbers. The result shows the performance in g-forces.

5. Frequently Asked Questions (FAQ)

Q1: What is a good launch performance value?
A: For Earth launch, typically needs to be >1g to lift off. Spacecraft usually aim for 3-5g at maximum acceleration.

Q2: How does performance change during flight?
A: Performance increases as fuel is burned and weight decreases, even if thrust remains constant.

Q3: What's the difference between performance and specific impulse?
A: Performance measures acceleration capability, while specific impulse measures engine efficiency.

Q4: How does gravity affect performance?
A: Performance is relative to local gravity. 1g performance means thrust exactly balances weight.

Q5: Can this be used for aircraft as well?
A: Yes, the same calculation applies to aircraft takeoff performance, though they typically need much lower values than rockets.