I woke up laughing from a dream . . . the dream of a bicycle being momentarily boosted by a number of water bottle rockets, using only recycled materials, ( or at least not buying anything new.)
This may seem at first seem like a silly idea but like all good projects I learned a lot, pondered a lot and, above all else, had fun on a bicycle at the same time.
I did not know if it would work but finding out was going to be rewarding and other people also enjoyed the spectacle of the rocket bike..
Think of this like the first car or the first powered flight . . . they were rubbish . . but these humble beginnings led to the supercars and the supersonic aeroplanes that we know today.
Step 1: Instantly Humbled by My Own Ignorance.
(See the first photo.)
Behold its majesty and, potentially, frightening watery power . . .
I then realised that the inner-tube bungs that I use for normal bottle rockets were not up to the job because they always leaked a little bit.
It was at this point that I realised this was a day wasted and that this would not be not as easy as I thought .
I began to research into a reliable delayed release system.
Step 2: Researching a Delayed Research Mechanism.
This site was very informative:
The first picture is from this site.
Read on and it will be explained.
I needed a plumbing fitting.
My plumber friend gave me one but Asking for another 8 of them wasn't really an option.
If I ever get another 8 The dream will happen but until then this is the first step.
Step 3: Time to Make.
The pipe that is needed is 21.5mm - I had some handy because a cowboy plumber had used it in my boiler instead of 22mm and it leaked constantly; I asked the man who repaired it for the 21.5mm; who would have thought that it would be used for a major technological leap ?
Cut a valve from an inner tube.
Drill a hole in the end cap 7mm, just tight enough to allow the valve through.
Fit and tighten these parts together.
Fit this assembly onto the 21.5mm pipe.
Step 4: Zip Tie Time.
See photos for the principle; the ties will be adjusted later.
The tops of the zips ties ' clip ' around the neck of the bottle and hold it in place until lhe launch.
It doesn't really matter where you use the jubilee clip along as when the pipe is inserted into the bottle that the zip tie ends are in the correct position to hold the bottle in place. ( see photos.)
Step 5: Adding the Trigger Tube.
I don't know where I got it but it is the perfect length and diameter.
I will measure it later; it is about 34mm diameter.
This slides over the 21.5mm pipe and the zip ties; it holds them in place.
Step 6: Adding the Powerhouse.
The bottle should be a third filled with water (champagne gives slightly more lift , (except the 73 vintage; a terrible year for rockets)).
The cap has to be drilled out with a 22mm bit.
An o-ring is needed to seal the cap; anything around the 22mm size seems to do the job.
Ok Baby, the bottle is pushed onto to the 21.5mm pipe.
Adjust everything until the zip ties are in line with the neck lip of the bottle.
Now push the wider diameter pipe over the zip tie end ; this locks them in place all rosy like.
Step 7: The Plank.
But I also added a little split block with a 22mm hole in it for the 21.5mm pipe.
This holds everything in place and also stops the pipe assembly being thrown into the face of an litigious bystander.
Step 8: Adding the Trigger.
This was taped to the trigger pipe.
Step 9: The Event.
That's one spurt for man but one giant gush for mankind.
Its been absorbing and fun.
Please vote for this Instructable if you have enjoyed it.
Step 10: UPDATE 2017 . . . This Guy Did It . . . ..