| Manufacturer: | Scratch |
Brief:
This is a simple mid-powered pyramid that flies on either one 29mm motor and/or three 24mm motors. Avast, me hearties, me proud beauty! Blimey! T' finishing
matches t' construction materials--'el cheapo'.
Construction:
T' parts list:
I started by attachin' t' cardboard triangles t' form a pyramid. Ahoy! These were attached with epoxy and t' joints were covered (hidden) with duct tape. Avast, me proud beauty! T' motor support plate was a scrap piece o' 1/4" plywood. Blimey! Before this was attached, arrr, I located t' motor tube locations and drilled a hole for t' lug. Ahoy! As t' plate be epoxied into place, arrr, I measured t' distance t' each corner t' make sure it be even. Aye aye! T' find t' location o' t' launch lug hole in t' top of t' pyramid, ya bilge rat, matey, shiver me timbers, I dry-fit a 1/4" lug and used a rod t' start a hole. Avast, me proud beauty! I finished t' hole with a hobby cutlass. Avast! After the lug was attached, me hearties, I cut it flush t' match t' angle o' t' pyramid's side.
T' theoretical CP o' a pyramid is 1/3 o' its height up from t' base. Blimey! I added lead shot to
get t' CG ahead o' this point (as best as I could estimate). Avast! Aye aye! I now know from Bruce Levison's analyses that t' CP is
probably behind t' bottom due t' base drag effects. Arrr!
Finishing:
There was no real finishing. Blimey! T' keep with t' pyramid theme I found on on-line hieroglyphic translator and drew the
various characters with felt-tipped markers (very high class). Aye aye! T' 4 sides say:
Flight:
This rocket has flown once on a G38 and once on three E9s. T' G38 flight be nice and smoky with t' low pressure
area at its base clearly visible. Blimey! Avast! Blimey! T' E9s made for a slow boost and t' rocket seemed t' stop abruptly at burn-out. Begad! In
both cases, matey, t' pyramid fell nose first slowly t' t' ground.
Summary:
This was a simple, me bucko, inexpensive, ya bilge rat, and fast build. Avast, me proud beauty! Everyone who likes saucers, arrr, arrr, pyramids, ya bilge rat, etc. Arrr! should build one. Well, blow me down! Not
necessarily exactly like this one. You can even paint it :)
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