Rocket vehicle kit each (TS0119)
An Engineering challenge!
Construct a Rocket vehicle powered by a balloon. Measure the greatest distance travelled.
Investigate the Efficiency of the Vehicle
The efficiency of the vehicle system is dependent on the initial volume of the balloon which may vary with different levels of inflation.
Other factors effecting the vehicle’s movement are air resistance to the vehicle’s movement through the air as a result of both the vehicles shape and that of the attached balloon.
Other factors such as wheel size and low friction axle/wheel combinations will effect the vehicles motion.
Once inflated the balloon has what is known as Potential Energy.
When the rubber balloon deflates and the axle and wheels turn, the potential energy is transformed into Kinetic energy (motion energy).
As stated in Isaac Newton's third law of motion:
"For every action there is an opposite and equal reaction"
The balloon pushes on the air, and the air pushes back on the balloon.
Because the balloon is attached to the vehicle, both move in unison.
Designing,Testing and Enquiry
· Do your wheels wobble?
· Do the axles spin freely?
· Has the balloon been inflated so much that it rubs on the wheels or the ground?
· Can you achieve a greater travel distance if you alter the aperture of the tubing? (restrict the flow of air)
· What happens if the tubing is shortened/?
· What happens if you glue CD discs onto the rear wheels?
· What is the average distance your vehicle travels after ten trial runs?
· Can you redesign your vehicle to carry an egg without breaking it?
· Will the vehicle travel further if made lighter? How might you do this?
Also look at http://coolprogeny.com/2012/04/12/make-your-own-balloon-car-and-watch-it-go/