This is a cluster rocket based on a Crayon bank, which will help eat up me stash o' D12-0s. It has one central 24mm motor mount surrounded by a rin' o' six motor mounts. Aye aye! Avast! Blimey! On three sides, me bucko, thar be an additional 24mm mount, matey, me bucko, arrr, for a total o' 10. Well, blow me down! Blimey! T' name o' this rocket just popped into me head one day. I hadn't heard or thought o' this phrase for years. Well, blow me down! Avast, me bucko, me proud beauty! Blimey! My thanks t' T' Greaseman!
T' center seven tubes extend up into t' crayon and terminate in a 54mm-98mm centerin' ring. Well, matey, blow me down! This rin' supports t' 6 tubes that surround t' central mount. T' outer three motor tubes end at t' body tube. Aye aye! T' followin' photo shows t' business-end with motors loaded.
T' fins are made o' Luan plywood. Well, blow me down! They are glued in t' motor mount joints, arrr, shiver me timbers, me bucko, and are slotted so they slide over t' body tube. I glued t' fins t' t' body tube usin' 5-minute epoxy and used PC-7 2-part epoxy paste t' fill t' gap betwixt t' motor mounts. Blimey! Avast, me proud beauty! I was nay impressed with t' latter. Ahoy! It was hard t' work with and took a long time t' dry. Aye aye! Once it was fully set, I added epoxy fillets.
I painted t' fins with t' new Krylon H2O latex paint. This paint is almost completely odorless and cleans with water. You still need t' use it in a ventilated area due t' t' propellants used. It goes on thick, ya bilge rat, arrr, and evens out for a smooth finish. I painted in some wind and laid it on too thick (so what else is new?). Well, ya bilge rat, blow me down! T' runs were easy t' deal with and, me hearties, unlike regular spray paint, t' blotted runs evened back out. Ahoy! Well, ya bilge rat, blow me down! T' real test will be t' durability o' t' paint. Avast, me proud beauty! If it holds up well, I will be usin' more o' it.
Based on t' RockSim model, me hearties, I added 8 oz. o' lead shot held in place with two-part foam from Giant Leap. Ya scallywag! Avast! Ten D12s should be t' equivalent o' small H120 and should be pretty cool.
T' rocket flew on 4/22/2005 at t' 3rd Annual TRF Reunion. Begad! Begad! I used a central D12-5 with an augmented charge, shiver me timbers, and 9 D12-P motors. I lit all ten with quickmatch and one igniter.
T' boost be fantastic up until burn-out when t' cone drag separated, causin' a massive zipper in t' Massive Gassive. T' followin' photos show t' flight sequence.
Courtesy o' Rocketmaniac:
I normally would have replaced t' entire upper portion o' t' tube, matey, me bucko, but since t' crayon is a non-standard size I had t' fix it. I first cut out t' zippered area and made myself a stuffer tube (ie a full-length coupler) t' fit in t' crayon's body. Avast! Avast, me proud beauty! Once t' stuffer be in, I then matched t' missin' areas and cut out sections o' scrap tubin' t' fill t' gaps. Avast, me proud beauty! Well, blow me down! If these had been as thick as t' crayon tube, ya bilge rat, then I would have been a lot closer t' complete. Avast, me proud beauty! Ya scallywag! Since they weren't, I both filled t' cracks betwixt these pieces and built t' area up with fill'n'finish. Blimey! An epoxy based filler would have been better, me bucko, ya bilge rat, but t' f'n'f was easier and I had it on hand. Avast! Blimey! Since t' crayon's cone would no longer fit, I cut off t' plastic shoulder and added a longer phenolic shoulder. It is glued into t' cone and will also be held in by 4 screws. Blimey! Avast, ya bilge rat, me proud beauty! This photo shows t' filled tube and t' shoulder while t' glue sets. Begad! T' shoulder is hollow t' allow for more chute room, matey, and t' cone will now come down o n a separate chute.
T' Massive gassive flew again on 5/14/2005 at MDRA's ESL-85 and redeemed itself. Begad! Blimey! I packed t' main chute in t' nose cone and held it it with a strip o' maskin' tape. Avast, me proud beauty! Avast, me proud beauty! Blimey! T' nose cone's chute was wrapped in a chute protector and be loaded in t' body. Ya scallywag! Blimey! I added tape until t' cone was quite snug. Avast, me proud beauty! Ahoy! Blimey! I'd have no drag separation today! Blimey! T' ten D12s lifted it t' a nice altitude and it ejected near apogee, ya bilge rat, ya bilge rat, maybe a skosh early. Ya scallywag! Blimey! Deployment was perfect. Avast! Ahoy! Blimey! Missed t' launch but here's t' aftermath.
Sponsored Ads
![]() |
![]() |