Welcome to the Water Rocket Forum, sponsored by The Water Rocket Achievement World Record Association.

The largest, most sophisticated and ground breaking group supporting you, the serious water rocket flyer! Whether you are a beginner or an expert, the WRA2 has something for everyone.

A water rocket is a type of model rocket using water as its reaction mass. The pressure vessel (the engine of the rocket) is constructed from thin plastic or other non metallic materials (usually a used plastic soft drink bottle) weighing 1,500 grams or less. The water is forced out by compressed air. It is an example of Newton's third law of motion.

Simulators

Post links to your team website here. Please include a description and tell us if you want your link added to the main WRA2 links page.
Post Reply
User avatar
WRA2
Site Admin
Site Admin
Posts: 1081
Joined: Sat Dec 30, 2006 11:30 pm

Simulators

Post by WRA2 » Mon Jan 12, 2009 5:47 pm

Post links to simulators in this thread. Please include a brief description stating weather it is freeware, shareware, commercial (indicate if a trial period is available) or home brew. These links will be compiled and placed on the WRA2 links page for easy access. We can also host downloads for simulators if needed.


Lisa Walker,
:WRA2: Forum Administrator. :WRA2:
:WRA2:The Water Rocket Achievement World Record Association :WRA2:

Cloud Dancers
WRA2 Member
WRA2 Member
Posts: 134
Joined: Wed Jan 31, 2007 7:39 pm

Re: Simulators

Post by Cloud Dancers » Tue Jan 13, 2009 9:34 pm

I guess I get to be first.

http://ourworld.compuserve.com/homepage ... orckt.htm.

DOD based water rocket simulator. Works very well with DOS based systems like WIN98. Some functions (like 3D graphing) in NT based systems like XP do not work well. Has anyone tried this on VISTA yet? Very accurate simulator. I recommend it.


The Cloud Dancers
Floating amongst the clouds

Scorpion_XIII
Advanced Member
Advanced Member
Posts: 22
Joined: Thu May 21, 2009 10:57 am

Re: Simulators

Post by Scorpion_XIII » Thu May 21, 2009 11:37 am




User avatar
The Sky Dart
WRA2 Member
WRA2 Member
Posts: 83
Joined: Mon Jun 15, 2009 10:44 am

Re: Simulators

Post by The Sky Dart » Fri Oct 23, 2009 1:47 pm

http://www.et.byu.edu/~wheeler/benchtop/sim.php

This is a very interesting simulator with extremely detailed theory background.


Cheers,
The Sky Dart
______________________________________
http://sites.google.com/site/theskydartteam/

User avatar
The Sky Dart
WRA2 Member
WRA2 Member
Posts: 83
Joined: Mon Jun 15, 2009 10:44 am

Re: Simulators

Post by The Sky Dart » Fri Oct 23, 2009 2:22 pm

The Sky Dart wrote:http://www.et.byu.edu/~wheeler/benchtop/sim.php

This is a very interesting simulator with extremely detailed theory background.
Sorry, I've failed to mention that theoretical calculations are confirmed by experimental data: http://www.et.byu.edu/~wheeler/benchtop/thrustcurve.php


Cheers,
The Sky Dart
______________________________________
http://sites.google.com/site/theskydartteam/

SaskAlex
WRA2 Member
WRA2 Member
Posts: 238
Joined: Tue Apr 07, 2009 2:36 pm

Re: Simulators

Post by SaskAlex » Mon Oct 26, 2009 3:55 pm

Cloud Dancers wrote:I guess I get to be first.

http://ourworld.compuserve.com/homepage ... orckt.htm.

DOD based water rocket simulator. Works very well with DOS based systems like WIN98. Some functions (like 3D graphing) in NT based systems like XP do not work well. Has anyone tried this on VISTA yet? Very accurate simulator. I recommend it.

Compuserve has been shut down. Does this simulator have a new home?



User avatar
rockets-in-brighton
Senior Member
Senior Member
Posts: 431
Joined: Fri Jun 20, 2008 12:33 pm

Re: Simulators

Post by rockets-in-brighton » Mon Oct 26, 2009 4:25 pm

SaskAlex wrote:
Cloud Dancers wrote:I guess I get to be first.

http://ourworld.compuserve.com/homepage ... orckt.htm.

DOD based water rocket simulator. Works very well with DOS based systems like WIN98. Some functions (like 3D graphing) in NT based systems like XP do not work well. Has anyone tried this on VISTA yet? Very accurate simulator. I recommend it.

Compuserve has been shut down. Does this simulator have a new home?
I posted a copy of the zipfile a week or two ago, must be in this thread or nearby?


Cheers
Steve
Rockets-in-Brighton
WEB: http://groups.google.co.uk/group/rockets-in-brighton

User avatar
rockets-in-brighton
Senior Member
Senior Member
Posts: 431
Joined: Fri Jun 20, 2008 12:33 pm

Re: Simulators

Post by rockets-in-brighton » Mon Oct 26, 2009 4:56 pm

SaskAlex wrote:
http://ourworld.compuserve.com/homepage ... orckt.htm.

Compuserve has been shut down. Does this simulator have a new home?
Here:

http://www.wra2.org/forum/viewtopic.php?f=3&t=576


Cheers
Steve
Rockets-in-Brighton
WEB: http://groups.google.co.uk/group/rockets-in-brighton

SaskAlex
WRA2 Member
WRA2 Member
Posts: 238
Joined: Tue Apr 07, 2009 2:36 pm

Re: Simulators

Post by SaskAlex » Tue Oct 27, 2009 6:39 pm

rockets-in-brighton wrote:
SaskAlex wrote:
http://ourworld.compuserve.com/homepage ... orckt.htm.

Compuserve has been shut down. Does this simulator have a new home?
Here:

http://www.wra2.org/forum/viewtopic.php?f=3&t=576

Good to know, thanks



User avatar
quique uy
WRA2 Member
WRA2 Member
Posts: 21
Joined: Mon Jan 04, 2010 11:02 am

Re: Simulators

Post by quique uy » Wed Jan 20, 2010 2:59 pm

Openrocket is open source, you may enter the densities of construction materials and thicknesses. That lets you know the CG and CP.
I do not think you can use this as a flight simulator because it was made for solid fuel rocket, but if you measure the thrust and the time a of water-rocket you might be able to enter such data as if it was a custom engine and so graph it

and very important ... is FREE :D

Openrocket es de código abierto , te permite ingresar las densidades de los materiales de construcción y espesores. Eso te permite saber el CG y CP.
No creo que se pueda usar como simulador de vuelo porque está hecho para cohetes de combustible sólido, pero si se mide el empuje y el tiempo de propulsión de un cohete de agua tal vez se podría ingresar ese dato como el de un motor personalizado y así graficarlo

y muy importante... es GRATIS :D


http://openrocket.sourceforge.net/

Un Abrazo


A.C.E.M.U. Member.
Asociación de Cohetería Experimental y Modelista del Uruguay

NeptuneRockets
New Member
Posts: 3
Joined: Sat Jan 17, 2015 12:01 am

Re: Simulators

Post by NeptuneRockets » Mon Sep 07, 2015 11:36 pm

This is a web page it runs on tablets and computers
http://cjh.polyplex.org/rockets/simulation/



voytex
New Member
Posts: 1
Joined: Mon May 20, 2019 8:31 am

Re: Simulators

Post by voytex » Tue May 21, 2019 4:30 am

Hi, I'm new here. Recently I became interested in water rockets and how does they actually work. I couldn't find any easy to use and comprehensible online simulator, so I decided to create one. After several months of work in free time I created simulator in JavaScript and deployed it on this address:
www.waterrocketsimulator.eu.
I'm still a beginner in programming and the page isn't yet well optimized for all browsers and devices (works best on desktops, on chrome or firefox). Although I hope this simulator will be considered as useful and quite accurate.
I'm open to your opinions about it and suggestions about developing it.



Afrom1
WRA2 Member
WRA2 Member
Posts: 4
Joined: Wed Nov 12, 2014 4:43 pm

Re: Simulators

Post by Afrom1 » Wed May 22, 2019 4:24 pm

voytex wrote:
Tue May 21, 2019 4:30 am
Hi, I'm new here. Recently I became interested in water rockets and how does they actually work. I couldn't find any easy to use and comprehensible online simulator, so I decided to create one. After several months of work in free time I created simulator in JavaScript and deployed it on this address:
www.waterrocketsimulator.eu.
I'm still a beginner in programming and the page isn't yet well optimized for all browsers and devices (works best on desktops, on chrome or firefox). Although I hope this simulator will be considered as useful and quite accurate.
I'm open to your opinions about it and suggestions about developing it.
nice and pretty simulator but it seems to be a bit of on the predicted height on a rocket that normally flyes 90m to 100m it is predicted to fly 150m. is it possible you can share the math behind it. normally uses http://polyplex.org/rockets/simulation/ and it is generally a bit on the hie side for my rockets



User avatar
anachronist
WRA2 Member
WRA2 Member
Posts: 231
Joined: Sun May 07, 2017 2:18 pm

Re: Simulators

Post by anachronist » Wed Jul 24, 2019 11:01 am

Afrom1 wrote:
Wed May 22, 2019 4:24 pm
voytex wrote:
Tue May 21, 2019 4:30 am
Hi, I'm new here. Recently I became interested in water rockets and how does they actually work. I couldn't find any easy to use and comprehensible online simulator, so I decided to create one. After several months of work in free time I created simulator in JavaScript and deployed it on this address:
www.waterrocketsimulator.eu.
I'm still a beginner in programming and the page isn't yet well optimized for all browsers and devices (works best on desktops, on chrome or firefox). Although I hope this simulator will be considered as useful and quite accurate.
I'm open to your opinions about it and suggestions about developing it.
nice and pretty simulator but it seems to be a bit of on the predicted height on a rocket that normally flyes 90m to 100m it is predicted to fly 150m. is it possible you can share the math behind it. normally uses http://polyplex.org/rockets/simulation/ and it is generally a bit on the hie side for my rockets
Nice! I should put mine in Javascript format. Currently it's an Excel workbook that I converted to Google Sheets so others can use it online.

Yes, the www.waterrocketsimulator.eu simulator predicts the apogee too high. I plugged in numbers for a typical 2L bottle, and got 145m whereas my own simulator gets 116m. I looked at the Javascript, and the math looks good overall, similar to my simulator, but it's missing some things as far as I can tell:
  • airflow after water is exhausted is choked at the speed of sound, slowing down the exhaust and reducing the air thrust
  • speed of sound changes with temperature
  • humidity of the pressurized air in the bottle mitigates the temperature drop and affects pressure
My own simulator accounts for these and additional things like atmospheric conditions. My articles on the math, and my simulator, can be found from this page: https://www.nablu.com/p/water-rocketry.html

-Alex



Post Reply