Brief:
The Pyramid is a free downloadable 13mm four-sided pyramid rocket with tumble recovery, although I received this one free with an order from Art Applewhite.

Construction:
The kit came printed on a single sheet of cardstock with the top and bottom as one whole section, motor mount tube, and instructions.

This rocket is very easy to build and requires very little time and extra materials. All that is needed is a hobby knife or scissors, ball point pen, a ruler and white glue.

I started by cutting out the launch lug holes and motor mount tube holes in the main section and then I cut out the main section and indented the lines with a ball point pen as recommended, which makes folding so much easier. I then glued the top section together and followed by gluing the bottom into the top section.

I cut out the motor mount tube, wrapped it around a 13mm motor, and glued it together. After the glue dried, it was into place and a fillet was added for extra strength to complete the assembly.

Overall, I went from having nothing but a single sheet of cardstock to having a flyable rocket in about 15-20 minutes.

PROs: Easy and quick assembly.

CONs: None.

Finishing:
No finishing was required due to the yellow cardstock but I sprayed on a light coat of Krylon clear to protect the cardstock from moisture.

PROs: No finishing required

CONs: None.

Construction Rating: 5 out of 5

Flight:
The only recommended motor for this rocket is the Estes A10-PT. Using a motor with an ejection charge would most likely blow out the front of the rocket as it is closed off at this point. The motor is friction fitted in place for flight. I flew this in my front yard on an A10-PT. The rocket zipped off the pad straight and fast to maybe 75 feet up, flipped over, and came down on my roof then bounced into one of the gutters where it was recovered with a slight amount of tip damage.

PROs: Low altitude flights, great for backyard flying.

CONs: None.

Recovery:
This rocket uses tumble recovery which is sufficient due to it's light weight but if it hits a roof or other hard surface, it will most likely suffer some minor tip damage. On the other hand, it does land close to the pad.

PROs: Easy, quick, and close recovery.

CONs: None.

Flight Rating: 5 out of 5

Summary:
I really like this rocket. It was free and only took a few minutes to build. In fact, I would like to see this offered in larger sizes like 18mm and 24mm as well. I highly recommend that you download, assemble, and fly one of these. You will not be disappointed.

PROs: Easy and quick assembly, flight performance.

CONs: None.

Overall Rating: 5 out of 5