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This rocket is based on a kid's toy I saw a couple of years ago that was pretty amazing for the materials involved. I decided to recreate it and see how well my version would work. It was a little heavier than the styrofoam toy that I had played with, but still seemed to work a lot better than you might expect. And, while you may have a rubber band big enough to reach low earth orbits, I haven't really done anything as far as heat shielding.  If you have kids that aren't quite old enough for model rockets, this is the perfect project for them.

I put the original version together in about a half an hour, and played with it for way too long to admit.  Eventually it got tore up, and now  I've decided to create a new and improved version.  This new version boasts some new features, almost all of which are designed to add distance.  Starting at the nose cone, it now allows for retractable rubber bands.  This will also allow multiple rubber bands to be used where it created too much instability in the original design.  The new body is a bit longer, and I figured out a way to help trim down it's circumference a bit and keep it rounder than before.  The tail fins are also much larger now to create more spin and ultimately more stability.  Finally, per a user comment I now also have a tool to launch the rocket with to avoid accidently thumping your finger on occasion.

Step 1: Build the Nose Cone

The materials are very easy to find. You'll need (x2) 2-Liter soda bottles, a 20 oz. soda bottle, some paper clips and rubber bands. For tools I started with a hot glue gun and a pair of scissors. However, I also used needle nose pliers for bending the paper clip to nice angles and placing it in the body.  On the thicker neck of the bottle a saw will need to be used a few times.

To get started, we'll begin with the nose cone.  Cut off the neck of the bottle, leaving as much of the straight section in place as possible.  Next, unscrew the cap and drill a couple of small holes (the size of the paper clip) near the top on two sides.  I didn't have a drill handy, and used a small leather punch in place of the drill for now.  First, remove and save (without destroying) the sealing ring, then go ahead and put the paper clip in place and screw the lid down tightly.  Then you can mark the raised section of the neck for two more holes to keep the paper clip in place.  Unscrew the cap and make your holes.  Finally, make a hole large enough on top of the cap for at least a couple of rubber bands to fit through.

Now it's time to put it all together.  Take the paper clip out, and put the rubber band(s) on.  The strength, quality, and number of rubber bands you use will make quite a difference on how the rocket performs.  This design is a little heavier than the original, and needs a little bit more power to fly well.  The paper clip on the inside keeps them from falling down into the rocket later on, and you'll be able to dig them out with the launcher (built in the next step) if needed.  I placed a golf tee under them so they wouldn't fall back through.  I had to use a pair of needle-nose to get the paper clips forced through the holes further down the neck, but that will keep it from falling out.  If you need to replace the rubber bands later, it's probably just best to also replace that paper clip.

Step 2: Build the Launching Tool

This is the easist piece to build, and it will help you building the body in the next step.  Leave the smaller hook in the paper clip, and straighten out the rest.  Take the ballpoint and cap off the pen, leaving the outer hull.  Put the paper clip on the fat end, and tape it with the hook facing towards the middle using your favorite type of tape.

Step 3: The Rocket Body

This is the most difficult step for the build.  Strip the labels off the 2-Liter bottles, and mark a vertical line on both with a ruler and a sharpie next to where the label was glued on.  Cut around (and keep for now) the top of both bottles, but make sure to leave a little bit of the curve around the entire way. Cut down the vertical line you marked on both bottles, and cut the bottom off around the line where the bottle no longer stays flat.  Sit one of them aside, that will be for the fins in the next step.

You will probably want to wrap your plastic shell around something roughly the same size as what you want the finished product to be.  Wrap it around twice, and make sure it is tight and even on both ends, then mark the ends with the sharpie where it meets inside the first layer.  Then use the ruler to make a straight line, subtract a little bit to compensate for the PVC (what I wrapped mine around) and cut out the body.   Next I used a spray adhesive on the inside of the bottle and quickly wrapped it back into a roll where it it was doubled over again.  At this point grab the 2-Liter bottle tops you cut off, and use them to place over the body to hold it in place at the correct size.

Now that it's drying, you can start working on the hook that will go inside the body.  Unfold a paper clip, and double it over as shown in the pictures.  A little ways down, you can bend the legs back out at about a 45 degree angle.  Your glue should be drying by now, so figure out how low in the body you need the hook to be and mark the rocket again.  I used a hot glue gun to really hold down the outer joint from separating.  From there, you can figure out where to drill two small holes for the paper clips to come out the side of the rocket.  Use a pair of needle nose pliers to place it inside- think of it as working on a ship in a bottle.  When you finally get it, place the hook in the middle and bend the paper clip down the sides.  I then dropped in some hot glue and used a pinky finger to kind of smear where I wanted it to go.  Just be careful not to burn yourself.

I used a bit of electrical tape to hold the paper clip to the sides.  One last thing to do, I sawed off a couple of rings from each of the bottle lips and placed these near the ends of the rocket body (unglued).  They can butt up to the fins and nose cone later, their main purpose is to keep the rocket body round instead of the oblong shape this design tries to force it to be. 

Step 4: Making the Fins

The fins are what I believe to be the single biggest component on whether it flies well or not.  I flared the ends just a bit (half an inch up, and and inch and a half long.  I then angled it out at 45 degrees.  The outside of the fin is 2 inches out, and runs up 2 and a half inches.  Then it also angles out at 45 degrees.  The rest is just a small runner to help hold the fins together.  I cut out on side of a cocktail straw and placed over the edge of all three and glued them in place.  I then glued the three straws together, being careful to try and keep them all at even distances and angles.  A good test on how good the fins are is to try to stand it up when the glue is dry.  The straighter it is, the better job you have done.  If it is crooked, look it over carefully to see why.  A little trimming with a pair of scissors might help fix the problem.

Step 5: Put It All Together

 You have the pieces all ready to assemble now.  I started with the fins and the body.  The side with the slightly rounded top will go up into the nose cone, and the other end will attach to the fins.  The hook inside the body will also reflect this.  I placed the two together, and using the sharpie matched up where they met each other.  Slide the lip ring up a little, and I used a pair of tin snips to make a half inch cut at each mark.  This allows the fins to actually go a little ways further up in the body of the rocket, and you can glue them together easier, making it much stronger.  Be conservative with the glue on the outside of the rocket, and plaster it in more on the inside for better aerodynamics.

Next, holding the nose cone just off to the side of the top, use your launcher to place the other end of the rubber bands over the hook on the inside.  Once they are in place, slide the nose cone as far down onto the rocket as it will go, and slide the other plastic lip up to meet it.  I left my hook up a little too high in the rocket, so I also cut the sealing ring we saved from before in half, and used that to make a small little half moon under the top of the rubber bands.  This isn't necessary, but I think it adds to the look and helped keep the rubber bands from being so loose.  They don't have to be stretched, but you don't want too much room left over or they may not retract properly.  Another problem is that they may become unhooked inside the rocket.

Step 6: Add Some Decals.

Now that the rocket itself is finished, you may want to paint it or add decals.  I took a robot sticker and cut out both the name and the robot.  I put some black electric tape around for a background, then placed the instructables.com II sticker over this, and put the robot on one of the fins.  It gives it a bit more of the feel of a rocket.  I also figured out this fits nicely on the end of CD trays, so I might create a "launch pad" display for it when I'm not playing with it.  Be warned that if you create one of these, they are very addictive.

This has been a re-build of my fifth instructable, and still one of my favorites.  It was a winner in the rubber band contest, and part of my new design has come from suggestions in the user comments below.  I hope the new directions allow you to build one that will fly even further than before.  Below is also a video of the old style in use.  I hope to get a new one put up soon, and to be able to start posting some new distances for you.  My original "50 foot+ Rubber Band Rocket" eventually got up to 78' with some modifications, and I'm hoping this new version can make it up to 100 feet or more before I'm done with it.  The only way to find out... build your own and start testing!  

Step 7: Observations of the New Design

I finally got to take a few test shots of the new design.  The first thing that I noticed was the my tree has grown a fair amount since the last tests, it was kind of in the way now of where I thought I needed to shoot.
 
Rundown of the video:
Shot One- Trying to go through tree.
Shot Two- Trying to go under tree.
Shot Three- Trying to go around tree.
Shot Four- Accidently figuring out I can easily go over the tree instead of through it.
Shot Five- Over the tree, estimated at 78 feet. The front edge of the road is 54 feet from my doorway, the road is 18 feet across, and it was five feet past the far edge of the road.


 
The first thing to mention is that while the sealing ring adds a nice look to the finished rocket, it doesn't stand up very well to the crash landings.  After reattaching it a couple of times, I finally gave up and just tore it off.  The only other modification I made was the hook on the inside.  After having problems trying to catch the rubber bands on it, I realized it was easier to just run a paper clip straight through, catching the rubber bands, and bending it back up the sides of the rocket to hold.  I then used some electrical tape to secure and hide the ends of the paper clip.

<p>this is badass</p>
<p>Thanks... I haven't &quot;played&quot; with it in a few years, but still have it sitting on my desk!</p>
what did you do to your knuckle in step 5? nice instructable, by the way.
It was collateral damage from cutting all the cardboard used to make <a href="https://www.instructables.com/id/The-QUB3-An-All-Purpose-Child-Booster/">this instructable</a>. Good eye, and glad you enjoyed the instructable. :)
This has me pretty intrigued... I'll have to make one for myself and mess around with it. I have a few extra airsoft springs floating around my workshop somewhere, kinda thinking that if the weight isn't too much i could potentially make a mechanism on the inside of the rocket that allows it to get power from the spring once the rubber bands are at the tension point and won't stretch anymore. I'll let you know how it goes :D<br><br>Also, Great 'Ible! its things like this that keep me addicted to this site =p
Thanks, I've just got a chance to repair my new model, and hope to start testing again... I'm pretty sure before I'm done playing with it that I'm going to hit 100+ feet. I've had a shot in the upper 80s now, and still don't think I've really reached the full potential of the rocket yet! :) If you make one, please post pics and flight results too, I'd love to see how someone else fares with this.
eh can't argue im in florida there is nothing to do here other than orlando
nah u cant argue with me... I'm from Singapore... there really isn't much things to do, since you get arrested for holding a weapon, or meeting with three or more people if u look suspicious. There really isn't as much freedom here than america, cos the freedom is sacrificed to make way for security... which is why there ain't much crime around here in Singapore
wow
best state ever:
pardon my ignorance but what does the bear on the flag signify??
the origin is accually a typo, it was suppose to be a &quot;Pear&quot;, instead of a &quot;Bear&quot;, but then what would the pear signify, i dont know....
jello biafra !<br />
i now a kid in 8th now that got shot in cali in like 5th grade so it sucks too...
In updating this instructable, I deleted the last step, which I didn't realize would also delete a bunch of the comments. So if you made a comment on this that is now missing, that is why, sorry.
cool <br>
excuse me but that isn't the louisiana flag...
no,loisiana is this, and it da best
i know i was pointing out that he should have louisiana up there
ooooooooooooooooooooooooooo lol i stupid
LoL. 50 ft? LOL
I knew this would likely meet some skepticism, thus bothering to take the time to add video. Check it out in step 7, see for yourself.
No, 50 ft is not that much. Plus, that does not look like it is 50 ft.
<strong>No,50 feet is not that much</strong>.In other words,you are saying that it is more than 50 feet.<br/>
No, I am saying something that only goes 50 ft doesn't go very far. And in the vide it doesn't look like it goes a full 50 ft.
its 1 rubberband.could u make a rubber band powered thingy go 50 ft using a 2 liter bottle(not using his design in any way) .
Well,build one and try it for yourself.I did and mine goes just as it should.
Congratulations on winning the contest.
thank you. :)
it needs to be heaver for more wind resistance
I've tried both, less weight flies much (up to a third) better than with weight added to it. Neither will really fly into the wind, but they float very well with the wind.
Wow!I love this thing.Made it myself and was amazed at how far it went.
I think this one might have had a better chance of winning a contest if it was entered into the tap'dny contest :P just my 2 cents. Great idea!
I considered it, but just a matter of time really. My original goal for that contest was actually a pontoon boat of sorts, and someone ended up making a raft anyway. The problem was, I just didn't have time to do anything except design it on paper. It's a little cold here in February/March anyway for boating adventures. With that said, I think this has a decent chance in this contest... rubber band power is somewhat limiting without quite of bit of imagination, and this fits very nicely with what they say said they're looking for (cheap, quick and easy to make, re-usable materials, and even the special flight requirement). I made it for free, from common household items, in under an hour total (including documentation for ible). IMHO, 50 feet will also be a tough mark to match/beat in the flying department. Anyway, thanks reading through and taking the time to drop a couple of lines.
Actually, I think I'll have to really agree with you on those points. Good luck on winning the contest! haha :D
Yeah!Enter this in the epilog challenge and say its green because it reuses a plastic bottle.
True, but I don't consider this to be "epic". :) However, I've been working on a project since January that I hope to get entered in the Epilog contest... details to come shortly!
My project I entered insn't epic either.
i might just vote for this
*waves hand in Jedi motion* You were just about to vote for the rubber band rocket... You were just about to tell all your friends to vote for the rubber band rocket.<br/>
what state flag is that ????????????????????????????????????????????????????????????????????
Seconded.
you know what it is... step one said so!<br/><br/><sub>but it might be Missouri</sub><br/>
I can see peoples breaking their fingers from this :S, made one myself but i also made a little wooden rod to fire it from :D
I don't know about broken fingers, but I have smacked my own fingernail a couple of times, and it does hurt like the dickens when you do so. :) A launching device of sorts is a most excellent suggestion.
im thinking a wooden plank with dowl rails to keep it from swerving to the side and a spring loaded hook at the end that sinks into the wood so it doesnt hit the tube... or use a ruler
How do you launch it?
There is a video at the end...
Yeah I know but the stupid computer blocks YouTube...
thumb and forefinger on the hollow back end of the tube, and index finger of other hand to stretch the rubber band, then let go of the tube. You may also consider replacing index finger with wooden dowel as suggested below by D4NG3RNL in order to avoid smacking your own hand with the rocket.

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Bio: Whoever first said "sticks and stones can break my bones, but words can never hurt me" obviously never attended a ninja poetry slam.
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