How do I calculate the apogee of a rocket before launch?

In summary, there is not a simple equation to determine the height of a rocket before launching it, as it depends on various factors such as air drag and the thrust curve. However, there are online model rocket height calculators available that can assist with these calculations. Additionally, the flight can be modeled using a complex differential equation, but it requires knowledge of the rocket and its components. It is not possible to ignore air resistance, as it is a significant factor in determining the rocket's maximum height.
  • #1
Matt-STIPA
1
0
Is there any equation in order to know how high my rocket will go, before launching it? I suppose that if there is any, it will not take into account air drag and others, and there is no need for that. I just one to know an approximate, I am making a summer project with some friends and we had this question. Thanks in advance.
 
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  • #2
There is not a simple equation, because the answer depends on many factors, ignoring air drag is not a reasonable assumption, and one needs to know the thrust curve also.

Do a search for

online model rocket height calculator
 
  • #3
Dr. Courtney said:
There is not a simple equation, because the answer depends on many factors, ignoring air drag is not a reasonable assumption, and one needs to know the thrust curve also.

Do a search for

online model rocket height calculator
Complex equation? I wanted to present this project to a local organisation and the demonstration of the process had to be shown and we would like to have these sort of calculations done on our own...
 
  • #4
Yes, but you have to know your rocket. In general, you can model the flight with a differential equation, solve that (worst case: numerically), and then find the maximal height.
 
  • #6
ok, you can't just ignore air resistance to fly (drag force) since its is one main paramerer in addition to vehicle weight, trust force and vehicle accelaration(its mustly defened on type of engine and design choice).
 

1. How do I calculate the apogee of a rocket before launch?

The apogee of a rocket can be calculated using the following formula: apogee = (initial velocity)^2 * sin^2(theta) / (2 * gravitational acceleration), where theta is the launch angle and gravitational acceleration is 9.8 m/s^2. This formula assumes a flat Earth and neglects air resistance.

2. What factors affect the apogee of a rocket?

The apogee of a rocket is affected by several factors, including the initial velocity, launch angle, gravitational acceleration, air resistance, and the mass and shape of the rocket. Other external factors such as wind and air temperature can also have an impact.

3. Can I use a simulation to calculate the apogee of a rocket?

Yes, there are various rocket simulation software and apps available that use physics calculations to predict the apogee of a rocket. These simulations take into account factors such as air resistance and can provide a more accurate prediction compared to the simplified formula.

4. Is the apogee of a rocket always the highest point in its flight?

Not necessarily. The apogee of a rocket is the highest point in its flight if it follows a parabolic trajectory. However, if the rocket experiences an engine failure or is subject to external forces, the apogee may not be the highest point in its flight.

5. How important is it to calculate the apogee of a rocket before launch?

Calculating the apogee of a rocket before launch is crucial for ensuring a successful and safe flight. It allows for the proper design and planning of the rocket, including determining the necessary thrust and fuel needed for the desired apogee. It also helps in predicting the potential flight path and any potential hazards that may arise during the flight.

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