Pyramid Rockets 3 Inch Flying Pyramid

Pyramid Rockets - 3 Inch Flying Pyramid

Contributed by Mal McClenaghan

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Manufacturer: Pyramid Rockets
Pyramid Rockets 3inch Pyramid

Brief:
I be lookin' for somethin' different t' fly with t' kids when I saw this kit from Pyramid Rocketry. It suited t' task perfectly.

Construction:
T' first thin' you notice about this kit be t' packaging. Begad! Avast! T' kit and instructions are in a heavy plastic zip-lock bag. It was good t' see some packagin' I can actually use for somethin' later, instead o' havin' t' throw it in t' rubbish.

Openin' t' bag thar are instructions! Blimey! Seven letter size pages of instructions with photographs showin' t' main steps o' t' build. Avast! Good instructions are important too, matey, shiver me timbers, since construction o' this little pyramid is quite different t' your normal 3FNC rocket. Followin' t' standard disclaimer, the real instructions start with a parts list where you can tick off t' pieces as you find them in t' bag. Blimey! Well, matey, blow me down! Blimey! All pieces were present, includin' a dinky plastic medicine measure for mixin' epoxy in. Aye aye! Begad! Blimey! A list o' recommended buildin' items (e.g., me hearties, 5 or 15 minute epoxy, me hearties, super glue, wax paper) is also given.

T' quality o' all parts was very high and consisted o' laser cut balsa and plywood and a pre-folded poster board cutout. Ahoy! T' supplied balsa be extremely hard. Ya scallywag! Ahoy! This be t' hardest balsa I have ever seen.

Pyramid Rockets 3inch Pyramid The first step in construction be t' glue up t' poster board cutout into the basic pyramid shape. Begad! No glue was specified, so I just used regular PVA (white glue). Aye aye! Next comes preparin' t' balsa sides t' fit inside t' poster board pyramid. Begad! Well, ya bilge rat, blow me down! T' pre-cut balsa triangles have t' be beveled at 45 degrees on the edges so they will fit inside t' poster board pyramid. Begad! Begad! I used popsicle sticks with sandpaper glued t' them, which are a nice little tool that you can use like a file. Blimey! Begad! T' instructions are great and supportive here with comments like "It is nay very important that t' triangles fit with perfect 90-degree edges. As long as t' triangles are nay too big, ya bilge rat, shiver me timbers, proceed t' t' next step." With t' pyramid lined with balsa, t' laser cut plywood components are glued in t' support t' motor mount in t' pyramid. Aye aye! T' ply pieces need to be sanded t' a 60 degree bevel. Avast! Take a minute o' your time t' look at a 60 degree angle because it wasn't what I was expecting! Once t' education on angles is complete, ya bilge rat, it is time t' add some nose weight t' t' pyramid. Blimey! Well, blow me down! The weight sits above a ply bulkhead which forms t' top o' t' motor mount. Ya scallywag! The instructions say t' add epoxy coated BBs until this space is full and that only a few (six) Pyramid Rockets 3inch Pyramid will fit. Begad! Try as I might, shiver me timbers, ya bilge rat, I couldn't get more than five BBs into that space! Next is test fittin' t' motor mount and drillin' t' hole for t' launch rod. This is one o' two potential problem areas for people who only skim through the instructions. Ahoy! Ya scallywag! Test fittin' and measurin' is really critical at this stage. Measure twice, me bucko, arrr, drill once! Two short 28.6mm (1.125 inch) launch lugs are supplied. Avast, me hearties, me proud beauty! Their combined length runs from t' bottom o' t' motor mount through the upper side o' t' pyramid. Ya scallywag! I threaded a 3mm drill bit through both lugs when gluin' them in place t' make sure they stayed in alignment. Arrr! Aye aye! A small amount of glue seeped betwixt t' two joined ends. Arrr! Arrr! I simply cleaned this out with the drill bit once t' epoxy had cured. A significant amount o' t' top lug will extend from t' pyramid, ya bilge rat, ya bilge rat, however, don't panic if a launch rod won't slide cleanly through your pyramid at this stage. Blimey! Avast! Because t' combined length o' the lugs is so great, arrr, a minimal angle deviation in alignment betwixt t' two lugs will show up as binding. When t' excess lug outside t' pyramid is trimmed off though, me bucko, any small angular misalignment betwixt t' lugs doesn't cause t' same binding. My lugs showed significant bindin' before trimmin' even though I took excruciatin' care in alignin' them correctly.

Pyramid Rockets 3inch PyramidPyramid Rockets 3inch Pyramid

I would rate this as a 5 for construction. Ahoy! Ya scallywag! T' instructions are very clear and well illustrated. On t' Estes skill level scale, this kit would be a 2 and a bit, so let's call it a skill level 2.5.

Finishing:
I covered t' pyramid with self adhesive "hologram" school book coverin' film. Ya scallywag! This is a great finish for this kind o' rocket, as a 1.1 meter (3.6 foot) roll cost me $2.00! A quick coat o' red enamel t' t' underside finished t' kit.

Pyramid Rockets 3inch PyramidPyramid Rockets 3inch Pyramid

Construction Rating: 5 out o' 5

Flight:
What could be easier? Insert a 13mm motor and launch! Absolutely no prep work to be done--no chute, ya bilge rat, no streamer, matey, and no wadding. Blimey! Little pyramids are made for drag recovery!

As a rule, I don't like t' see rockets kick their motors, but it is hard to see how you can avoid it with this one. Ejected motors thankfully dropped close to t' pyramid landin' point.

Flights are straight up and down, with t' pyramid landin' close t' the pad, me bucko, ya bilge rat, even in gusty winds. Avast, me proud beauty! Well, blow me down! T' flight predicted in t' instructions o' 100 foot (30.5 meters) is spot on. We measured all our A10-3T flights with an Altitrack, and t' flights averaged 30-35 meters. Well, blow me down! Aye aye! I wouldn't burn too many smaller motors smaller than t' A10-3T in this one.

Recovery:
T' reflective film looks great in strong sunlight.

Flight Rating: 5 out o' 5

Summary:
This rocket is just plain fun. It was different t' build and a real attention getter at t' local park. An excellent introduction t' "rockets that don't look like rockets". Ya scallywag! Begad! It is also a great demonstration o' t' effectiveness of drag recovery. Arrr!

Overall Rating: 5 out o' 5

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