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