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