1. What is Ram Drag of Turbojet?

Ram Drag of Turbojet refers to the drag force experienced by a turbojet engine due to the impact of air at high speeds. It represents the momentum drag of the incoming air that must be overcome by the engine's thrust.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( D_{ram} \) — Ram Drag of Turbojet (Newton)
• \( T_G \) — Gross Thrust of Turbojet (Newton)
• \( T \) — Net Thrust of Turbojet (Newton)

Explanation: The ram drag is calculated as the difference between the gross thrust (total thrust produced) and net thrust (effective forward thrust).

3. Importance of Ram Drag Calculation

Details: Accurate ram drag calculation is crucial for aircraft performance analysis, engine efficiency assessment, and understanding the net propulsive force available for aircraft movement.

4. Using the Calculator

Tips: Enter gross thrust and net thrust values in Newton units. Both values must be positive numbers, with gross thrust typically being larger than net thrust.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between gross thrust and net thrust?
A: Gross thrust is the total thrust produced by the engine, while net thrust is the effective forward thrust after accounting for ram drag and other losses.

Q2: When does ram drag become significant?
A: Ram drag becomes more significant at higher airspeeds where the momentum of incoming air creates substantial drag that must be overcome.

Q3: Can ram drag be negative?
A: No, ram drag is typically a positive value representing the drag force that reduces the net available thrust.

Q4: How does altitude affect ram drag?
A: Ram drag decreases with altitude due to lower air density, which reduces the mass flow rate of incoming air.

Q5: Is this calculation applicable to all jet engines?
A: While the concept applies broadly, specific calculations may vary for different engine types such as turbofans or turboprops.