Manufacturer: | Scratch |
Brief:
When I saw a pool noodle with a 2.5" hole down t' middle, shiver me timbers, I immediately
saw a rocket. A tube finned rocket. Avast, ya bilge rat, me proud beauty! Boink recovery. Ahoy! Ya scallywag! What a way t' start the
Spring! I named t' rocket Noodle Toober t' pay homage t' MDRA member Dave
Webber's Toober, which
has logged 200 high power flights.
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. Well, blow me down! I cut t' fins usin' a custom sized guide made from a section o' scrap 4" tubing. Begad! T' dense foam cut well with a regular old hacksaw. 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, arrr, arrr, me hearties, 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. Aye aye! This
required four hands and some small bungee cords. Avast, me proud beauty! As I was peelin' off t' loose
blobs o' glue, I decided some extra support was needed, ya bilge rat, so I ran bamboo skewers
through each glued transition, matey, 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. Begad! 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, and for the payload section's shoulder. Avast! I also added a foamboard bulkhead t' keep the chute from blowin' up into t' payload. Begad! You see, this description is nay in time sequence--I had already found that it got too heavy for boink recovery. Avast, me proud beauty! I also hadn't left enough room for a chute, shiver me timbers, so t' bulkhead is recessed a couple of inches into t' fabricated shoulder. Avast! Avast! Oh well, matey, stuff happens in real time design.
I turned t' cone on me drill press from a piece o' 4" thick soft foam. Begad! I installed a dowel in t' foam usin' Gorilla Glue. Avast, me proud beauty! Ahoy! This was hard t' work with bein' so soft, but I got it turned. Avast! Blimey! When I went t' install it, ya bilge rat, me hearties, matey, I found 2 problems. First, it is round and t' noodle is slightly ovate. Aye aye! 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 hearties, and it would have been better t' leave it full diameter for a couple o' inches. No big deal, ya bilge rat, just somethin' learned with 20/20 hindsight.
When thinkin' boink recovery, ya bilge rat, arrr, I didn't account for t' nose weight required to make t' rocket stable. A suitably sized plastic Easter egg, me bucko, some kitty litter, and some more Gorilla Tape did t' trick. 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. Begad! Since I didn't provide for positive retention, arrr, I made a
quick and dirty clip out o' a coat hanger t' augment t' standard friction
fitting. Ahoy! I have had success with this method before. Begad! T' wire clip fits around
the nozzle and through t' slots in t' closure. Blimey! Legs extend down t' side of
the motor mount. Begad! T' clip is slipped on and wrapped with maskin' tape. Well, blow me down! I opted
for an 18" chute and used both dog barf and a chute protector.
Since I bought me 24mm RMS case, ya bilge rat, me hearties, I have been usin' t' Copperheads that come with t' reloads. Avast, me proud beauty! Blimey! Begad! Blimey! So far, shiver me timbers, me experience has been much better than ~5 years ago when I quit usin' them. Well, blow me down! Blimey! Avast! Blimey! T' flight was quick and low. Arrr! Blimey! Arrr! Blimey! T' draggy Noodle Toober stopped smartly after burn out.
Recovery:
Ejection was late but t' recovery was successful. Arrr! 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. It is a poor
performer since it's so draggy. Ya scallywag! If anyone builds one, ya bilge rat, I recommend a 29mm motor
mount.
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