Brujita´s Blog

SCIENCE FAIR 2

2006-03-29T15:01:00.000-08:00

Smooth off the face of the coupling with very fine abrasive paper. This face will mate with the mouth of the rocket and to make the contact air tight it must be perfectly smooth. Put the abrasive paper on a flat surface and rub the garden hose coupling over it with a circular motion.
Cut a hole through the centre of a PET bottle top. The hole must accept the shoulder of the hose coupling. For me the hole needed a diameter of 19 mm. If you use a twist drill the hole may not be properly round so use an 18 mm drill bit and carefully shave off extra plastic with a sharp knife. Remove what remains of the plastic seal from inside the bottle top.
Make up a gasket from the thin plastic. Cut a circle of the material to the same diameter as the hose coupling and then cut a hole in the middle of it. The gasket helps to make a good seal between the coupling and the mouth of the PET bottle as well as protects the coupling from being scratched as you screw it on and off the bottle.
Put the hose coupling, the bottle top and the gasket together as shown in the photo. No glue or sealant is necessary. This becomes the nozzle for the rocket and can be screwed onto any rocket that you care to make.
With a hacksaw, cut one of the PET bottles into three parts as shown in the figure. The top part will become the nose cone, the middle will become the fin and the bottom can be discarded.
Push the nose cone over the base of the second PET bottle. Tape it in place with some duct tape.
Using the duct tape, tape the struts to opposite sides of the second PET bottle. The struts should point down and extend at least, say, 100 mm below the mouth of the second PET bottle.
Tape the cylindrical fin section from the first PET bottle to the struts with the duct tape. The rocket is complete and should now look something like the one shown in the figure. Note that the longer and further back that you make the fin the more stable the rocket will be.
Testing and Launching the RocketWARNING: There is enough energy stored inside a pressurized PET bottle to seriously injure yourself if it explodes. And the rocket flies with enough speed to break bones if it should become unstable in flight and head back to earth. Please adhere to the safety precautions given below. You need a car foot pump to pressurize the rocket. It needs to be sturdy to withstand the amount of use it will get. And it needs to have an in-built pressure gauge so you know how far it has been pumped.
Pressure TestThe pressure test will allow you to check that there are no leaks in your system and that the bottle will withstand the pressures required.
Fill the rocket completely with water. It must be full of water so that it cannot explode if the PET bottle ruptures.
Attach the rocket to the launcher. Keep yourself and other people clear of the launcher.
Pressurize the bottle to 3 bar (45 psi) and check all joints and connections carefully for leaking water. Make sure that the pressure reading on the pump's pressure gauge does not fall; it should stay constant if there are no leaks.
Increase the pressure to 7 bar (110 psi) and check again for leaks. You will not pressurize the rocket beyond 6.5 bar (100 psi) when you launch it.
Launching the RocketLaunch your rockets only in large open areas where there are no people around. The best rocket flights go straight up and then come straight back down. If the rocket is unstable it can fly in any direction. It will often fly horizontally. Rockets have been reported to fly as high as 90 metres so if it is windy they may land a large distance from the launch pad. Your launch string should be at least 10 metres long.
Push the launch pad into the ground so that the nails hold it stable. Make sure the rocket sits level.
Fill the rocket 40% with water.
Attach the rocket to the launcher and make sure that it is securely held and pointing directly up.
Pressurize the rocket. Use 3 or 4 bar (50 psi) for your first launch in case the rocket is not stable. Do not go higher than 6 bar as the bottle may be at risk of exploding. Keep yourself (and everyone else) as far from the bottle as you can while you are pumping it.
Warn everyone that you are about to launch and check that everyone is paying attention to the launch.
Count down to 1 and pull the launch string (from 10 metres away). If the rocket does not go straight up it may be unstable. To improve the stability of the rocket you must either increase the length of the cylindrical fin or move the fin further back (by increasing the length of the struts).

2006-03-29T14:46:00.000-08:00

@ Nerd Jail

2006-01-13T18:19:00.000-08:00

Hi bloggers!!

I hope you stay online reading my entries. :)

If you like it, I have bad news; but if you don't then there are good ones 4 u :P

A Zoey 101 Picture, w/ books :s

I'm studying 4 my cuatrimestral exams :s

I'm @ Nerd Jail

I get free on Thursday 26

I know ... I'm going crazy before start but that's part of the stress, I just have to handle it in a good way, all the stress use for good things and all the energy 2: STUDYING. Those are only a few days ... then I'M FREE AGAIN!!!

Soooo ... Keep reading my blog when I come back ;)

Good Luck and Have FUN!!!

XOXO,

The same ME only @ Nerd Jail

Nerd Jail Logo :P Hahaha!

Some lessons 4 life!!!

2006-01-05T19:22:00.000-08:00

Hi bloggers ...

Here I am giving you some lessons 4 life :P ... I think they are pretty useful so I hope that you can use it 2 ...

"You couldn't erase the past. You couldn't even change it. But sometimes life offered you the opportunitty to put it right"
- Bee and Eric's lesson @ Girls In Pants

"Try, reach, want, and you may fall. But even if you do, you might be okay anyway"
- Katherine and Tibby's lesson @ Girls In Pants

"Life will often be fun, sometimes even fabolous - and no matter what, it will never be boring"
- Addie's lesson @ Keepin' it Real!

"The little voice in my head won't let me forget ... There are some thins a GIRL won't do"
- Hilary Duff @ Little Voice

Those are some lessons 2 live, that are important 2 have a better live and make your dreams come true in some special way. But also they are important and unforgettable words that can change someone's world .... YOURS!!! So don't forget them...

With a special feeling for sharing this w/ you ... because they are like a precious treassure that I found, but I'm happy of share them cuz someday you can need or them :)

Infitive X's and O's,

The same me (Brujita) in English again :P

Primera entrada en Espaniol

2006-01-05T11:28:00.000-08:00

Hola bloggers!!!

Lo prometido es deuda asi que aca estoy ... en español para todos ustedes!!!

La verdad es que tengo mucho para contarles asi que mejor pongo orden y comienzo :P

Lo primero es desearles muchas cosas buenas, busna vibra, energia positiva y muchos sueños (realizados y nuevos) para este año 2006. Pero sobretodo mucho amor, mucha paz, mucha salud y mucho exito y prosperidad. Espero que tengan grandes logros este nuevo año!!!
Lo segundo, es una deuda que tengo desde el año pasado ... y es contarles sobre mi viaje con mis amigas. La verdad fue una gran aventura, pues empezando porque desde el dia antes comenzamos calentando los motores llendo de compras y para salir fue todo un drama: atrasos en el horario, la jeepeta de mi papa tuvo un problemita y bla bla bla. Seguimos con que la casa de mi familia pues tenia mucho tiempo cerrada asi que olia a peste :) jiji. Se me olvidaba! Mi primo nos dio un tour super chistoso por su casa (aunque yo ya la conocia :P -ni modo-) que hizo reir a todas mis amigas un monton. Llegando nos dimos cuenta de algo super importante: dejamos lo de la comida del primer dia!! Despues no habia electricidad, en la noche el agua se fue y por ahi miles de travesias. En plena oscuridad cuando despues de bañarnos asi estabamos recogiendos para emigrar a la casa de mi padrino (la del tour) pues les die tres puntos de vista a las chicas sobre el viaje: el primero, uno pesimista - cambiamos de ambiente para pasar trabajo, hacer lo mismo de siempre y conseguir lo opuesto de lo que buscamos; el segundo, uno realista - estamos pasando mucho trabajo pero aun asi la estamos pasando muy bien; y el tercero, uno positivo - cambiamos de ambiente, ahora estamos en medio de una aventura y nos vamos a gozar todo lo que venga. Y asi fue, esa noche y esa mañana fuimos las fugitivas en pijamas de esa calle. Y todo nos lo gozamos, lo malo es que cuando nos ibamos pues ya se arreglo todo (el agua, la electricidad y eso) pero bueno ya sabemos que tenemos casa en otro lugar y para buscar aventura solo tenemos que ir alla. ¡Ah si!, se me olvidaba la tarde antes terminamos jugando juegos de niños -aunque ya habiamos jugando de grandes :P- como las escondidas, el topao, la sillita ... hahaha ... gracias a mis dos primitas.
Esto es solo un minimo recuento pues la verdad la pasamos super diferente y creo que para todas terminaron siendo uno de los viajes mas divertidos que hayamos tenido.
Y lo tercero es que estoy triste, ya se me acaban las vacaciones y tengo que volver al cole -¡apesta!- y peor aun la semana despues ya tengo mis examenes semestrales. Pensar que tengo que aguantar 6 meses mas en ese manicomio: es un manicomio, casi todos estan locos ahi!! Ni modo, a seguir sobreviviendo. Aunque no se si pueda sobrevivir al libro que me tengo que leer: me esta matando del aburrimiento, no puedo leer mas, tengo un sueñoooo!!! Me estoy durmiendo de lo aburrido que esta.

Bueno mejor me voy porque si no sigo ahora no termino jamas, y la verdad es que hoy quiero terminarlo porque mañana voy para el cine!!!, por segunda vuelta a ver Harry Potter and the Goblet of Fire. Y creo que el sabado tambien :P a ver Cheaper by the Dozen 2, por fin!!! Nada mas me queda ver Narnia, sera la despida de mi libertad antes de los examenes.

Me termino de ir ... les deseo mucha suerte y pasenla super!!!
Se cuidan eh!
Besos y abrazos,

Yo ... la misma brujita en un diferente idioma :)

PD: Quedo super largo, no?
No se aburrieron?? :s Perdon!

Happy New Year!!!

2005-12-31T19:39:00.000-08:00

Hi bloggers!!!

or it's only you ... well who ever read this :p

I wished u a ver happy new year,

full of good things, best wishes ... and

love, health, happiness, and dreams some true.

This is my last entry this year ... so I better do it short,

It's only less than 10 minutes 4 NEW YEAR!!!!

New Year I tell u about my trip ... this time in Spanish :P

So ... Keep reading my blog, bloggers, this new year,

and probably getting borred with me :s

Infitive X's and O's and Best Wishes :)

The Same Me (Brujita) waiting 4 a New Year!!!

How much FUN we had!!

2005-12-28T16:32:00.000-08:00

Hi bloggers!!

I'm back :P ... where I was?! ... Well I was in a beach town (but not in the beach, for good) in my family's house w/ some friends searching 4 some fun and relaxing ... but the only thing we found was a LOT of fun!!!

The bad thing is that I think I'm getting sick, and right now I don't have much time 4 tell u about our adventure, yes! it was a BIG adventure ... so I better tell you 2morrow ;)

Keep looking here 4 the story, you are going to LOL.

So ... see ya ... and have a FUN day like me ...

here I am ... once again ...

The same Brujita only @ my house once again!!!

I believe in true love! (L)

2005-12-25T19:09:00.000-08:00

WOW!

How to begin today?!

I don't know ... so here I go!

I was reading the serie of "The Sisterhood of the Traveling Pants", and today I finished "Girls In Pants" ... um, how to explain, the whole serie I read because of Bridget and Eric. So, I was like upset because in this book he has a girlfriend, and they (Bee and Eric) become friends, then someday after he take care very well of her he ran away. But finally he change the whole story and put the prefect end!!!!

And ... and ... they change my life ... I was in a point that I didn't certainly believe in true REAL love, because of life's causes. But since I read they story, I'm sure that true love can hold everything and always is going to win. Now I believe in true love. I believe I would have my own story ... and I can see everything different.

I'm just ... pretty happy ... mm ... so so so HAPPY!!!! :D and full of life, and love (L) and just good things. I can't even erase the smile in my face.

Well, I have another thing to do to complete my hapiness ... so keep reading my blog.

See you around ... XOXO!!!

And be HAPPY!!!

Me ... The Same One (Brujita) but w/ a new life. :D

Online finally

2005-12-24T21:48:00.000-08:00

Hi everyone,

I´m ONLINE finally ... haha!

I was trying to get a RED blog but neither me or my best friend can,

so I try here ... and here I am!!!

First ... MERRY CHIRSTMAS!!!!

I hope Santa Claus read your lists and gave u what u deserve :)

Today, I guess, I don´t have so much 2 say ... I´m here working w/ my mom´s iPod

and reading one of the best books I ever read ... GIRLS IN PANTS!!!! I love it, I just can´t hold on reading!!!

Well, I might go back 2 my work ...

See ya around and Take Care ;)

Infitive XOXO,

Me ... Brujita!