Building a Water Rocket: What Affects Launch Height?

Click For Summary

Discussion Overview

The discussion revolves around the factors affecting the launch height of water rockets, including design considerations, materials, and techniques for pressurization. Participants share their experiences and seek advice on various aspects of building and optimizing water rockets.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant notes a trade-off between the amount of water used for propulsion and the overall mass of the rocket, suggesting that filling a 1.5 - 2 litre bottle to about one-third provides optimal flight.
  • Another participant raises questions about how to pressurize the rocket, inquiring whether a gas pump is necessary and expressing concerns about access to kits in India.
  • There are discussions about the impact of nozzle size on performance, with some suggesting that standard bottle openings are sufficient.
  • A participant emphasizes the importance of minimizing drag through aerodynamic innovations and suggests having a weight at the top of the rocket for stability.
  • One participant shares a link to a company website for additional resources and information on building water rockets.

Areas of Agreement / Disagreement

Participants express a variety of views on the optimal design and construction of water rockets, with no consensus reached on specific techniques or configurations. Questions about pressurization methods and aerodynamic design remain unresolved.

Contextual Notes

Participants mention specific materials and designs, but there are limitations in the discussion regarding the availability of kits and tools in different regions, as well as the lack of detailed technical specifications for modifications.

Who May Find This Useful

Individuals interested in DIY projects, educational experiments in physics, and those looking to enhance their understanding of aerodynamics and propulsion systems may find this discussion beneficial.

jackson
Messages
6
Reaction score
0
I'm Currently Making A Water Rocket And I Want To Obtain More Information About The Factors That Might Affect It From Launching Higher. Thanks For Your Help Really Appreciate It.
 
Physics news on Phys.org
Its a trade off between more water (for propulsion) and less water to lower the mass. At school we use 1.5 - 2 litre soft drink bottles for the main bodies. You fill these to about the 1/3rd level for the highest and longest flights. 3 litre bottles are rubbish...

Nozzle size is also a factor, but the std drink bottle opening works fine. We use toy kits called 'Roket's to build them up.

Great fun, good Physics!
 
thanks adrian your help is very much appreciated
 
how the hell do u pressurise them ?
ive heard of these water rockets ,and i plan to build one of these but i live in India and i don't think i can get the kit here in India .but i'll try

how can the nozzle size be altered ? what kind of aerodynamic innovations do we need to minimise drag ?and what's the size of the fins [the thingys that stick out from the fuselage] for standard 2 litre softdrink bottle ?

my main problem remains pressurising the bottle ,do you require some kind of a gas pump or something like that ?
 
Also remeber to make it have the smallest wing span possible. Also you want to have a wieght at the top like a tennis ball or a racket ball. You need to do this so it has some wieght at the top also you need to have a smaller wingspan iwht yoru fins so as to not have it fly everywhere because even the smallest imperfection on a bottle rocket screws it up.
 
extreme_machinations said:
how the hell do u pressurise them ?
ive heard of these water rockets ,and i plan to build one of these but i live in India and i don't think i can get the kit here in India .but i'll try

how can the nozzle size be altered ? what kind of aerodynamic innovations do we need to minimise drag ?and what's the size of the fins [the thingys that stick out from the fuselage] for standard 2 litre softdrink bottle ?

my main problem remains pressurising the bottle ,do you require some kind of a gas pump or something like that ?

Here - have a look at the company website...

www.rokit.com

Also, type Rokit into Google for loads of info
 
Here's one of our rockets in action. (if I uploaded the file properly!)

They sure go high!
 

Attachments

  • rocket.jpg
    rocket.jpg
    19.2 KB · Views: 476

Similar threads

  • · Replies 13 ·
Replies
13
Views
3K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 6 ·
Replies
6
Views
3K
Replies
4
Views
2K
  • · Replies 5 ·
Replies
5
Views
5K
  • · Replies 12 ·
Replies
12
Views
4K
  • · Replies 24 ·
Replies
24
Views
4K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 3 ·
Replies
3
Views
2K