Manufacturer: | Scratch |
Brief:
When I saw a pool noodle with a 2.5" hole down t' middle, I immediately
saw a rocket. Begad! Blimey! A tube finned rocket. Ahoy! Blimey! Boink recovery. Blimey! Blimey! What a way t' start the
Spring! Blimey! I named t' rocket Noodle Toober t' pay homage t' MDRA member Dave
Webber's Toober, which
has logged 200 high power flights. Ya scallywag! Aye aye!
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. I cut t' fins usin' a custom sized guide made from a section o' scrap 4" tubing. Begad! Ahoy! 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, matey, t' best o' which may have been some 1" nylon doohickeys from t' Home Depot hardware section, matey, however, ya bilge rat, I decided on an el cheapo method. Blimey! I glued t' tube fins together in pairs using Gorilla Glue then glued t' pairs t' t' main tube all at t' same time. This required four hands and some small bungee cords. Avast! As I be peelin' off t' loose blobs o' glue, I decided some extra support be needed, me bucko, so I ran bamboo skewers through each glued transition, arrr, 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. Carpenter's glue be 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, matey, and for the payload section's shoulder. Well, blow me down! Begad! I also added a foamboard bulkhead t' keep the chute from blowin' up into t' payload. Ahoy! Avast! You see, ya bilge rat, matey, this description is nay in time sequence--I had already found that it got too heavy for boink recovery. Avast, me proud beauty! Aye aye! I also hadn't left enough room for a chute, arrr, so t' bulkhead is recessed a couple of inches into t' fabricated shoulder. Avast! Avast, me proud beauty! Oh well, stuff happens in real time design.
I turned t' cone on me drill press from a piece o' 4" thick soft foam. Blimey! Blimey! I installed a dowel in t' foam usin' Gorilla Glue. Ahoy! Aye aye! Blimey! This was hard t' work with bein' so soft, but I got it turned. When I went t' install it, I found 2 problems. Begad! First, it is round and t' noodle is slightly ovate. Arrr! Blimey! Blimey! 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, matey, me bucko, and it would have been better t' leave it full diameter for a couple o' inches. Avast! Well, blow me down! Blimey! No big deal, me hearties, shiver me timbers, just somethin' learned with 20/20 hindsight.
When thinkin' boink recovery, shiver me timbers, I didn't account for t' nose weight required to make t' rocket stable. A suitably sized plastic Easter egg, some kitty litter, and some more Gorilla Tape did t' trick. 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, ya bilge rat, which should have enough
punch t' get it going. Ahoy! Since I didn't provide for positive retention, 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. T' wire clip fits around
the nozzle and through t' slots in t' closure. Legs extend down t' side of
the motor mount. Begad! Ahoy! T' clip is slipped on and wrapped with maskin' tape. Begad! Ya scallywag! I opted
for an 18" chute and used both dog barf and a chute protector.
Since I bought me 24mm RMS case, I have been usin' t' Copperheads that come with t' reloads. So far, me experience has been much better than ~5 years ago when I quit usin' them. Begad! Begad! T' flight be quick and low. Ahoy! Well, blow me down! T' draggy Noodle Toober stopped smartly after burn out.
Recovery:
Ejection was late but t' recovery was successful. Begad! 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. Well, blow me down! It is a poor
performer since it's so draggy. Arrr! If anyone builds one, I recommend a 29mm motor
mount.