Make your own water bottle rocket launcher! - Part 2 of 3
Summary
TLDRThis instructional video script outlines the process of building a water bottle rocket launcher. It details each step, from preparing the PVC components with primer and cement, creating a bulge for the water bottle seal, to assembling the launch rail and constructing the trigger mechanism with wire ties and duct tape. The script also covers the creation of a spring mechanism using a cut two-liter bottle and a band clamp, ensuring the rocket is held securely until launch. Finally, it describes the firing mechanism assembly, using nylon string and a coupling, to release the rocket for flight.
Takeaways
- 🔧 Start by threading the valve stem through a half-inch hole in the end cap using pliers and a rag to avoid marring.
- 🚀 Ensure the valve is well seated within the end cap to hold the pressure needed for launching the rocket.
- 🛠️ Assemble the launcher base using PVC cement, primer, and end caps, ensuring proper ventilation and cleanliness.
- 🔗 Attach the end caps and tees to create the main launch rail and support structure, taking care to avoid glue blockages.
- 🔥 Use a heat source to create a bulge in the long piece of PVC for a water bottle seal, being cautious in a well-ventilated area.
- 📏 Measure and mark the PVC at 10 inches to form the launch rail, ensuring it's straight and properly aligned.
- 🔨 Attach the tees and other PVC components to build the complete launch platform, maintaining a vertical orientation for stability.
- 🔗 Create a trigger mechanism using wire ties, duct tape, and zip ties to secure the bottle and control the launch.
- ⚙️ Use a band clamp and a cut two-liter bottle as a spring to hold the rocket in place until launch.
- 🎯 Construct a firing mechanism with a nylon string and a drilled coupling to pull the trigger and release the rocket.
Q & A
What is the first step in assembling the valve sim through the half-inch hole?
-The first step is to insert the valve sim from the inside of the end cap to the outside, then pull it through using pliers and a rag to avoid marring.
Why is it important to use a rag when pulling the valve sim through?
-Using a rag prevents marring or scratching the valve sim while pulling it through the hole, ensuring a smooth and damage-free process.
How do you ensure the valve sim is properly seated within the end cap?
-After pulling the valve sim through, you should see a little rim pop out. Continue pulling until it is well seated within the end cap to hold the pressure needed for launching the rocket.
What is the purpose of using PVC cement and primer when building the launcher?
-PVC cement and primer are used to bond the PVC pipes and fittings together, creating a secure and airtight connection that is essential for the proper functioning of the rocket launcher.
Why is it recommended to apply PVC primer and cement in a well-ventilated area or outside?
-PVC primer has a strong odor and can create a mess, so applying it in a well-ventilated area or outside prevents inhalation of fumes and keeps the workspace clean.
How do you create a slight bulge in the long piece of PVC for the water bottle seal?
-You heat the entire circumference of the PVC at the 10-inch mark using a candle or heat gun until it becomes warm and pliable, then apply pressure to create a slight bulge while it cools.
What is the purpose of the bulge in the PVC pipe?
-The bulge in the PVC pipe is where the water bottle seals against when launching, ensuring an airtight seal for the pressure to build up and launch the rocket.
How do you attach the trigger mechanism to the launch rail?
-You use wire ties to attach a piece of duct tape with six medium zip ties spaced evenly across it to the flange of the bottle when it's on the launch rail.
What is the function of the spring in the water bottle rocket launcher?
-The spring acts as a release mechanism, holding the rocket onto the launch rail until the firing mechanism is pulled, at which point it releases the rocket to launch.
How do you create the firing mechanism for the rocket launcher?
-You drill a small hole in a 1.25-inch coupling, thread nylon string through it, and tie it off. This assembly is placed over the launch rail and zip ties, and the string is threaded down through two holes to create the pull mechanism for launching.
What is the final step to fire the rocket using the launcher?
-The final step is to put the bottle over the launch rail, pull down on the firing mechanism to seat the rocket, and pressurize it. Then, pull the string to release the rocket.
Outlines
🚀 Building the Rocket Launcher Base
The first paragraph outlines the initial steps for constructing a rocket launcher using PVC pipes. It begins with threading a valve sim through a half-inch hole in an end cap, using pliers and a rag to avoid damage. The process of applying PVC primer and cement to join the pipes is explained, emphasizing the need for a well-ventilated area due to the primer's strong odor. The primer dries quickly, and cement is applied sparingly but evenly. The construction involves attaching end caps to pipes, ensuring the valve stem is not obstructed, and creating T-sections by gluing additional pipes. The paragraph concludes with instructions on creating a slight bulge in a long piece of PVC for the water bottle seal, using a heat source like a candle to soften and shape the PVC.
🛠️ Assembling the Launcher and Trigger Mechanism
Paragraph two details the assembly of the rocket launcher's structure and the trigger mechanism. It starts with ensuring the launch rail is vertical, which can be aided by a square for accuracy. The paragraph then describes the process of attaching a tee to the launch rail and checking the seal with a water bottle. The construction continues with creating a trigger mechanism using wire ties, duct tape, a permanent marker, and zip ties. A scrap piece of PVC is used as a reference to measure and mark the circumference of the pipe. The zip ties are then aligned and attached to the launch rail, and a band clamp is used to secure the bottle in place. The paragraph also covers the preparation of a spring mechanism from a cut two-liter bottle, marking and cutting the necessary shapes for the spring to fit and function properly.
⚙️ Completing the Launcher and Firing Mechanism
The final paragraph focuses on the completion of the rocket launcher and the firing mechanism. It begins with cutting out circles from a two-liter bottle to create a spring holder and a flap for the band clamp. The spring is then fitted onto the launch rail, and a band clamp is used to secure it in place. The firing mechanism involves drilling a hole in a one and a quarter inch coupling, threading nylon string through it, and attaching it over the zip ties on the launch rail. The string is threaded through holes in the coupling and tied off to create a pull mechanism for launching the rocket. The paragraph concludes with instructions on how to load the rocket onto the launch rail, pressurize it, and fire it using the string. The video script also encourages viewers to engage with the content creators on social media and to ask questions or share their experiences.
Mindmap
Keywords
💡Valve Sim
💡End Cap
💡PVC Cement
💡Bulge
💡Launch Rail
💡Zip Ties
💡Duct Tape
💡Trigger Mechanism
💡Band Clamp
💡Firing Mechanism
Highlights
Guide to installing the valve stem through the half-inch hole with tips on using pliers and a rag for a secure fit.
Explaining the importance of PVC cement and purple primer for assembling the launcher, with a step-by-step guide on their application.
Detailed instructions for creating a bulge in the long PVC pipe to ensure a tight seal for the water bottle, including safety tips for heating the pipe.
Instructions on how to check the bottle's seal with the launcher before finalizing the build.
Guide on attaching a tee to the launch rail with precision, using a square to keep the structure vertical.
Explanation of adding a valve stem tee and ensuring the two tees are flat and square to maintain balance during launch.
Step-by-step process for building a trigger mechanism using zip ties, duct tape, and PVC pipe.
Instructions on how to use a two-liter bottle as a reference and seal for the zip ties and duct tape around the launcher.
Guide to creating a spring for the launch mechanism by cutting a two-liter bottle and tracing circles to form the spring and flange.
Instructions for installing the spring mechanism over the launch rail, with tips on adjusting for zip tie fit.
Guide for creating the firing mechanism by attaching a coupling and threading nylon string through drilled holes.
Explanation of how the firing mechanism works by pulling the string to release the rocket from the launcher.
Final steps to prepare the launcher for firing, including attaching the bike pump to pressurize the rocket.
Overview of safety precautions and tips for maintaining a proper seal while launching the rocket.
Conclusion with instructions on how to fire the rocket, engage with the community, and follow the creator on social media for more content.
Transcripts
alright one of the first steps you need
to do is get your valve sim through your
half inch hole I do that it's really
easy go to the inside of your end cap to
the outside then you're going to need to
pull it through and that's what the
pliers before it also helps if you have
a rag so you can grab without marring up
here fausto you just want to pull that
force it through it may take a little
work once you get it all the way through
there's a little rim you'll see pop out
and check by continuing to pull and it
should be well seated within the end cap
and that'll now hold the pressure that
you need to launch the rocket so this is
what we'll be building next this is half
of the base of your launcher I'm going
to show you how to build one real quick
if you've never used PVC cement before
basically what you do is put just a
little bit of this purple primer on here
now this stuff smells really bad and so
you want to do it either in a
well-ventilated area or it's best and
easiest to just do it outside because it
can also group and make a bit of a mess
once you go you have the primer on it'll
dry fairly quickly you can have some
cement it doesn't take much but you do
want to coat it all the way around and
then you'll put on one of your end caps
and twist it about a quarter turn and
you'll fill up lock and it'll get to
where you can't even move it fairly
quickly and that'll make the sill and
that's the basis of putting the pipe
together what you want to do is put an
end cap on two pieces
you can see here that one of these
that's my belt stamina doesn't matter
where that piece ends up now because you
don't want the glue to plug your valve
stem tip the PVC downward like this as
it dries so that any extra glue will
drip out rather than in your fitting and
then last glue a tee between these two
pieces as we get over here and put an
additional piece in that key and that's
how you make your 2 t sections alright
the next thing we want to do is put a
slight bulge in our long piece of PVC
this will be what the water bottle seals
against when you go to lunch so what
you're going to do is get out your
candle if you have one or have someone
else hold the lighter for just a few
minutes I'll light my candle here and
again make sure you do this in an area
that's away from anything that's
flammable and also well-ventilated let's
do well then the lady
all right we were having a hard time
keeping our candle lit so I'm going to
have a buddy over the lighter for me and
we'll show you how this is done you want
to be patient and keep rotating this we
heat it up you need the entire
circumference to be warm
DBC pliable we've got the reference line
at 10 inches that we know we're in the
right spot
don't touch the BBC to nearly where your
touch where your heat gun looks like
it's soft enough I'm just gonna take the
put pressure on that while it cools you
can see if that's a slight bulge
[Music]
you need to hold that and try to keep
the PVC as straight as possible and
exact tools that bowls will become
permanent you only need it to be ever so
slight because the diameter of the PVC
is already nearly perfect to seal
against the bottom to the SX holes will
become rigid again that's how you get
the silk here we have our long section
of pipe we just showed you how to put
the bulge in it now that we've done that
and we want to continue building our
launch platform you want to make sure
that the end from which you measure 10
inches is upward and then we're gonna
glue it down to this 13 that we have and
that's our main launch rail all right
the next step now is to glue one of our
tees to our LAN trail now I forgot to
mention earlier but while you're getting
this bulge in your launch rail you may
want to grab your bottle and check that
it makes a good seal
we've done that and it looks good so now
we're ready to glue it here now what
we're gonna do is use our square to help
us get this perfectly vertical or nearly
so it doesn't have to be exact
in fact if you want you can put a slight
angle in it to have your rocket launch a
little bit farther down range but I'm
gonna do mine vertical today so I'm real
quickly gonna add some in and because it
dries fairly fast I'm going to have to
that on rotated a quarter turn and then
hold it vertical while it dries I'm
going to go ahead and do that you want a
nice flat surface and you can see this
vertical as you can see we're pretty
close definitely closing on so now we'll
let that dry for just a second and then
we'll add on our second key all right
now we want to put in our tea that has
the valve stem in it and attach it to
our launch rail now if you have a
preference make sure that you turn this
to whichever side you want it on it
really doesn't matter at this point
now you want to do this on a flat
surface so that your two tees are nice
and flat and square give that an extra
minute to dry while we move on to some
of the other steps right the next step
is to make your trigger mechanism the
way we're gonna do that is use these
wire ties to grab on to this flange of
the bottle when it's on blonde trail now
this is just a scrap piece of PVC I have
you can use your lawn trail or any other
piece of 1/2 inch PVC for this next step
we're just gonna use it as a reference
you also need some duct tape permanent
marker 6 medium zip ties and it's
helpful to have a ruler so what we're
gonna do first is take a piece long
enough it'll fit around the tube at
least once we're just gonna wrap that
all the way around and lay it back on
itself and then we're just gonna mark
with our permanent marker where those
two where that end meets the rest of the
tape then we'll pull that off and that's
our reference for the a circumference
pipe then we'll set that aside what we
want to do is use these zip ties and
we're gonna lay them
large end facing up from the table and
we're gonna put one right at our mark
and you want to go most the way down the
zip tie
now we'll clip this at the end and you
want a good 5 inches or so here and then
what you want to do is put a second one
at the other end and you can use this
ruler they help you keep them aligned
well so that they all fit against the
flange evenly and you're gonna try to
just space these evenly all six of them
across the duct tape next step before we
put our zip ties on the launch row we're
gonna take this band clamp use your
flat-head screwdriver to loosen it all
the way so you can slide it down on your
launch rail then we're gonna take our
two-liter bottle it will eventually use
as a rocket and slide it over now you
want to seat it on the Bulge don't force
it on farther than it needs to go just
push it down until it feels like it's a
good seal and we're gonna use that as a
reference height will now take your zip
ties what you've lined up with the
roller on your duct tape and we're gonna
wrap those around we're gonna slide
those down until they just sit right on
that lip that flange on the bottle and
then once you get it where it sits just
right you'll wrap your duct tape around
and stick it with a launch rail right
there and you want to take your extra
two-liter bottle and we're gonna use
this as a spring for our launch
mechanism what you want to do is if you
have a box cutter it helps to get a slit
started with that and once that's once
you've cut into the bottle you go and
cut it around
we're gonna go ahead and use our sharpie
or other permanent marker with our one
and a quarter inch couple and we're
gonna take this and put it roughly in
the center and what you want to do is
trace the inside of that onto your
screen then we're gonna take a spare
piece of pipe or you can turn your
rocket-launcher upside down and use it
and we're gonna trace on the other end
the outside of your one half-inch pipe
then on the small circle we want to
trace another extra eighth inch or so
around that cuz it's gonna need to fit
over the zip ties as well
and then lastly draw a line down the
center so now we're gonna cut out our
circles start with the top one as you
can see I put a slit in it by doing this
that will help us get our scissors in
and you're just gonna cut this out and
there we go we have the big hole done
now the smaller hole we don't want to
cut out the entire circle we want to do
is cut it into semi circles but we're
gonna leave a little portion in the
middle so that our flap hangs down
now you'll see that there's a flap and
that'll hold our spring in place in the
band clamp I'll go ahead and cut the
other side here so the next step is to
take our spring and slide it over our
launch rail
now if these zip ties won't fit through
this hole you can widen it a little bit
and we'll go ahead and slide it down and
then what we want to do is pull our
spring down and then we're gonna fasten
our band clamp over these flat these
little flaps that we've left hanging
down from our spring
thus fitting which is the release
mechanism will slip over top and this
spring will keep it up in a safe
position holding the rocket onto the
launch rail until we pull it down so
I'll go ahead and and fasten this band
clamp so now to make our firing
mechanism we take that one and a quarter
inch coupling and drill a small hole now
I've drilled a 1/8 inch hole it's really
easy to do with PVC cause it's so soft
and then you're gonna take your nylon
string and thread it through that hole
and tie it off now it likes to fray so
it helps to warm the end with a match or
a lighter just to seal it off once you
get that tight on there good we're gonna
put it over our launch rail over the zip
ties and you'll see that it sits on this
spring now and then take your string and
thread it down through both holes and it
should fit through both of them easily
because they were able to fit over the
you're gonna thread that down through
both holes and then that will be what we
pull on to launch the rocket now what I
typically do is just run it under one
side of the PVC and then you can see
that if you stand to this side of the
rocket and pull your firing mechanism
releases now that the launchers done to
fire rockets simply put your bottle over
the launch rail pull down on your firing
mechanism so you get the rocket seated
and the zip ties are over the flange and
your spring should hold it up firmly
against the rocket to keep it from
firing while you pressurize up put the
bike bike bump up to your bow stem and
then you're ready to fire just by
pulling the string and you'll see that
it's really easy to do but we've enjoyed
having you and showing you how to build
a water bottle rocket launcher please
check us out on Facebook and Twitter and
feel free to post any questions you
might have to our Facebook account or in
the comments below
glad to have you with us and we'll see
you next time
you
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