Transform the Water Rocket Launch Pad Into a Pyro Rocket One... in Seconds!!!



About: I studied Electrical Engineering and a lot of other things. I'm always driven by my passions. Please visit also my Youtube channel.

Planning to land a rocket vertically? Take a look at this other Instructable...

Anyway, I've already published an Instructables that helps you to build your own PVC Water Rocket Launch Pad equipped with Gardena connector.

(Actually it was among the finalists of the PVC contest :-)

Anyway, after building and launching a lot of water rockets, I've decided to give a go to the pyro ones (using Estes motor). So, I've built from scratch my cardboard rocket and after watching a few videos on Youtube (there is an excellent tutorial made by The King of Random), I've decided to create a module that I can attach securely to my Water Rocket PVC Launch Pad, without damaging it.


Please follow the model rocket safety code, as model rockets may be very dangerous if used inappropriately.

For this tutorial you need:

1 4mmx1meter metal rod (rail that guarantees a straight and safe launch)

1 cork cap

1 piece of PVC pipe (depending on the length of the rail you've previously built)

1 1/2 Litre bottle of water (to be connected to the water rocket launch pad)

1 Male Gardena connector (built following the links suggested in my previous tutorial)

1 30cm Metal Lid (aka blast deflector - please buy one thick and made of steel, not aluminium!!!)

1 metal bar (that is going to be placed under the lid)

1 8x4mm screw for wood

1 bolt (to close the hole previously used for the handle of the lid)

1 nut (to close the hole previously used for the handle of the lid)

3 washers (1 larger as possible to protect the centre of the lid during the launch)

1 electrical terminal (just the metal part of it)

4 (at least) camping pegs, to fix safely the launcher to the ground

Step 1: Attaching the Metal Lid to the 1/2 Litre Water Bottle

Remove the handle from the metal lid.

Mine had 2 holes and luckily I've been able to use one of them, to slide into it the metal rod/rail.

To secure the lid to the bottle, I had to drill another hole at the centre of it.

After that, I used a screw for wood and the large washer (placed at the centre of the lid).

To close the hole of the handle I used a nut, a bolt, and another small washer.

It's important to close any hole of the lid properly, otherwise you'll damage the launch pad.

For the same reason underneath I placed a metal bar, to withstand in a better way the heat generates by the pyro motor during the launch.

Last but not least, I've screw an old male Gardena connector that wasn't sealing properly my water rocket.

(to make yours, please follow the links suggested in my previous tutorial)

Step 2: Preparing the Metal Rod/rail

Again, I wanted to use as many parts as possible of my previous PVC Water Rocket Launch Pad, therefore I've decided to use the same base of the rail, to insert the metal rod inside of it.

I basically put a cork top inside the small piece of PVC pipe (that matches perfectly the height of the 1/2 Litre water bottle when slotted into the launch pad).

After that, I drilled a 3mm hole and I've inserted the metal rod inside the PVC pipe.

Step 3: Final Assembling

You now have the metal rod, inserted to the small PVC pipe and the 1/2 Litre water bottle, attached to the lid.

Slide the metal rod inside the hole of the lid and connect the pipe to the previous rail (used for the water rockets).

Slide into the female connector your water bottle with the lid attached.

At this stage it's very important to secure the rod, using the metal part of an electrical connector (picture 3).

When you are outside, secure the launch pad to the ground using 4 (at least), camping pegs.

Last important thing, when you are positioning the rocket on the blast deflector (lid), be sure the motor is aligned with the large washer. In this way the blast will be direct at the centre of the lid and, eventually, after a few of launches, you can replace just the washer.

You are ready to launch your pyro/model rocket.

Step 4: Have Fun... Always Being Safe!!!

3... 2... 1... Go!

Again, please follow the model rocket safety code, as model rockets may be very dangerous if used inappropriately.



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