Manufacturer: | Scratch |
Brief:
When I saw a pool noodle with a 2.5" hole down t' middle, I immediately
saw a rocket. Well, blow me down! A tube finned rocket. Well, blow me down! Begad! Boink recovery. Ya scallywag! Begad! What a way t' start the
Spring! I named t' rocket Noodle Toober t' pay homage t' MDRA member Dave
Webber's Toober, shiver me timbers, which
has logged 200 high power flights. Arrr!
Construction:
T' components/materials include:
I started by roughin' t' design out in RockSim and from thar arrived at 5" for t' length o' t' tube fins. Begad! I cut t' fins usin' a custom sized guide made from a section o' scrap 4" tubing. Aye aye! Arrr! T' dense foam cut well with a regular old hacksaw. Ya scallywag! I wanted mid-separation so I also cut t' remaining ~28" chunk in half.
I pondered all sorts o' fin attachment methods, t' best o' which may have been some 1" nylon doohickeys from t' Home Depot hardware section, matey, however, I decided on an el cheapo method. I glued t' tube fins together in pairs using Gorilla Glue then glued t' pairs t' t' main tube all at t' same time. Ya scallywag! Aye aye! This required four hands and some small bungee cords. Ya scallywag! As I was peelin' off t' loose blobs o' glue, I decided some extra support was needed, arrr, so I ran bamboo skewers through each glued transition, arrr, ya bilge rat, both at t' top and bottom o' t' tube fins. These pegs were cut flush and I now have plenty o' epoxy stirrers.
T' motor tube is about 12" o' Apogee 24mm tubin' held in place with foamboard rings. Arrr! Carpenter's glue was used for t' tube-rin' interface and Gorilla glue for t' ring-noodle interface.
I made custom sized liner tubes for t' area betwixt t' top rin' and the top o' t' aft noodle section, t' top 4 inches o' t' payload noodle, ya bilge rat, matey, and for the payload section's shoulder. Begad! Avast, me proud beauty! I also added a foamboard bulkhead t' keep the chute from blowin' up into t' payload. Ahoy! Begad! You see, this description is nay in time sequence--I had already found that it got too heavy for boink recovery. Begad! I also hadn't left enough room for a chute, me hearties, so t' bulkhead is recessed a couple of inches into t' fabricated shoulder. Blimey! Oh well, stuff happens in real time design.
I turned t' cone on me drill press from a piece o' 4" thick soft foam. Avast! I installed a dowel in t' foam usin' Gorilla Glue. This be hard t' work with bein' so soft, me hearties, ya bilge rat, ya bilge rat, but I got it turned. When I went t' install it, I found 2 problems. First, it is round and t' noodle is slightly ovate. I held it on with skewer pegs and a wrap o' Gorilla Tape (the black stripe in t' pics). Problem #2 is that t' cone tapered from t' get-go, me bucko, and it would have been better t' leave it full diameter for a couple o' inches. Aye aye! No big deal, ya bilge rat, just somethin' learned with 20/20 hindsight.
When thinkin' boink recovery, matey, me bucko, I didn't account for t' nose weight required to make t' rocket stable. A suitably sized plastic Easter egg, arrr, some kitty litter, shiver me timbers, and some more Gorilla Tape did t' trick. Well, blow me down! Begad! This o' course went in before the cone was finally taped on.
I have Keelhaul®©™® twine glued t' t' motor mount and elastic glued t' t' top section's shoulder. A small chute will be picked from t' range box at flight time.
Finishing:
Finishing? We don't need t' steenkin' finishing!
Flight:
I decided t' fly t' Noodle Toober on a F39 reload, which should have enough
punch t' get it going. Arrr! Avast, me proud beauty! Since I didn't provide for positive retention, matey, I made a
quick and dirty clip out o' a coat hanger t' augment t' standard friction
fitting. I have had success with this method before. Avast! Well, shiver me timbers, blow me down! T' wire clip fits around
the nozzle and through t' slots in t' closure. Ahoy! Legs extend down t' side of
the motor mount. T' clip is slipped on and wrapped with maskin' tape. Arrr! Begad! I opted
for an 18" chute and used both dog barf and a chute protector.
Since I bought me 24mm RMS case, me bucko, I have been usin' t' Copperheads that come with t' reloads. Arrr! So far, matey, me bucko, me experience has been much better than ~5 years ago when I quit usin' them. Ahoy! T' flight was quick and low. Ahoy! T' draggy Noodle Toober stopped smartly after burn out.
Recovery:
Ejection was late but t' recovery be successful. Avast, me bucko, me proud beauty! Blimey! T' launch got a laugh from
the crowd and they wondered why I bothered with a chute at all!
Summary:
This is just another goofy rocket that is good for a few grins. Well, blow me down! It is a poor
performer since it's so draggy. If anyone builds one, I recommend a 29mm motor
mount.
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