We’ve Made Progress :)

So as you must know by now (have you read the project outline?) we’ve been given a specific class of motor we are allowed to use for this rocket. It’s all about altitude to win this one, so we need to design a rocket with that in mind.

At the last meeting we went over the basics of OpenRocket, and sent everyone back to work on some designs; so far we have a rudimentary outline of the rocket, which is far from complete:

Basic Design

Our first basic design.

We know it isn’t much at the moment, at least we know we are aiming for a minimum diameter rocket, but we have more pressing issues to worry about…

…we need to choose a motor!

You can see some of the thrust curves, which is a graph of the performance of a rocket motor (thrust vs. time), of some of the motors we have the choice of using below:

(Click the images to make them larger)

If you’re not 100% sure what they are showing. watch the animation below to get an idea of what they mean and represent:

Animation

 

Also, try heading over to NASA to get some more information about thrust curves and how they represent performance.

Before we decide on which motor is best, we need to get a better idea of what the total mass of the rocket will be and then we need to run some more simulations gain the greatest apogee. I won’t be long before we start order supplies, so keep an eye out for this sign on any university deliveries:

Danger

Speak to you soon!

Challenge:

If you think you have a good grasp of the concepts, and have an idea of which rocket motor would be best to use*, why don’t you drop us a message and we’ll let you know if you get it right!

Good luck guessing** 


*Hint: try thinking in terms of having a set, constant mass having to be launched by each motor (in reality the mass will be continuously changing).

**or logically/mathematically working out which one might be best for our situation… Max altitude, minimum diameter!

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