I will not describe all the rockets I have built, but only the most significant.

The very first, called alpha01 consisting of a simple bottle topped with a cone, made from the top of another bottle, and 4 rigid cardboard fins. With each flight I had to change the cone or at least the stripped one.


Then, I made Espoir01 which also included an aerodynamic shutter recovery system. She climbs a little lower, but she no longer suffers from the return to earth :-)


I then tackled the multi-bottle tanks, first by drilling holes of approximately 20mm in the bottoms of the bottles and assembling them by gluing by sliding a tube of 20 mm in external diameter into the hole. Bonding with araldite first, then with sykaflex 11FC. I was having trouble avoiding leaks, so I switched to the method described by Bruce Berggreen (whose site has unfortunately disappeared). I describe this method on the page "tank".





Ass to ass collage with a hole drilled in the bottom of each bottle in which is put a tube and the whole glued to araldite or sykaflex 11FC

Double 0.5l, which served as the second stage

Double 1,25l

Double 2l, which can serve as a first stage.

I built several tanks on which I placed different kinds of fins and different kinds of cones.

bicoco bicoco



I then switched to multi-stage rockets. The first stage being consisting of a double 1.5l bottle and the second, i.e. a single 0.5l or a double 0.5l.

Jonction 2 e?tages.jpg Gonflage2etages1



I also tried some funny recovery systems, first a recovery with deployable wings (the 3 pictures on the left, then helicopter style on the right

Planeur02 Planeur1



Even crazier, I made a Cansat launcher. It was a double 1.5l surmounted by the housing for the cansat which was dropped at apogee.

The rocket was recovered on its side and the cansat on the other

LAES sur Rampe



Rockets based not on soft drink bottles but on FTC (polycarbonate) tubes

First without structural reinforcement, so the tubes alone, then sheathed by a carbon / epoxy sheath to be able to build up pressure. For this kind of very fine rocket, (diameter 42mm), difficult to make a recovery system by aerodynamic shutter, hence the need to switch to electronics

Flip01 Flip02-elec Flip02 sur rampe Hippie01surRampe

Along with these rocket evolutions, the launch base has  also evolved.





Very first launcher with lug retention system rotary

Improvement of the previous claw retaining system

Another improvement: the vertical part of the tube is removable which allows on the one hand easier storage but also change the restraint system. Here claw system but we can use a cable tie system or a garden hose.

The same kind of ramp but based on CPVC tube, there is no welding, than gluing.

Rampe4-Profil2 Rampe V4-tuyauterie.jpg



More stable frame, and precise water dosing system, but inflation through the metering bottle.

Modification of the ramp opposite by adding a three-valve ways to send the pressure either into the metering bottle, either in the rocket.

High pressure ramp under construction. Here in test at pressures compatible with a bicycle pump, i.e. less than 10 bars

The same finished with the connection for the high pressures.

Other achievements, in bulk

Twice 1.25l, cardboard fins

Four times 1.5l akylux fins

Twice 1.25l, cylindrical fins and nozzle type  connector garden hose

1,25l, cardboard fins and with a flash inside to better identify it. To launch at nightfall




0,5l, PET fins

0,33 l akylux fins

FTC T17 tube-based rocket (63mm diameter) Recovery by electronic timer, fins cut from old CDs. Carbon cone

6 x 2l, PET fins next to a 2 x 2l, PET coated balsa fins