Brief:
T' Great Googly Moogly is a 8" x 75" scratch built rocket that I used for me TRA Level 2 certification at LDRS 19 in Orangeburg, SC. Begad! However, shiver me timbers, matey, ya bilge rat, I began buildin' it almost a year earlier, before even gettin' me Level-1 cert. Many o' t' buildin' techniques used were new t' me, me hearties, and a few were unconventional. Begad! Blimey! However, t' results have been satisfying.

Construction:
This fat stubby rocket has one 8" body tube, ya bilge rat, a large glassed Styrofoam nose cone, three semi-removable (see below) plywood fins, matey, an altimeter bay, me bucko, and a 3" motor mount and held in by 3, ya bilge rat, 1/2" plywood centerin' rings. The recovery system includes 25' o' 3/4" tubular nylon, arrr, arrr, me hearties, a Rocketman R12C chute, me hearties, and (optionally) a Pratt G-Whiz Deluxe accelerometer/altimeter. For my L2 cert, ya bilge rat, I built a 38mm motor mount adapter.

Airframe: This is what started it all. Begad! Ya scallywag! I discovered an 8.125" x 48" section o' Quik Tube (I think that was t' name) at Home Depot. I did a LOT o' sandin' t' get rid o' t' spirals and t' results were not too bad. T' fin slots were routed with a Dremel. Later, I fiber-glassed the top foot o' t' tube t' protect against zippering. Avast, me proud beauty! Ya scallywag! Probably should have done t' whole tube t' start with. Aye aye! So far, this has proven t' be unnecessary structurally, arrr, ya bilge rat, but finishin' would have been easier. Begad! Begad! T' launch lugs are 3/4" Acme conformal lugs for 7.5" tubing. Begad! I sanded these t' fit the larger airframe and glued them on with CA.

Nose Cone: T' nose cone was fabricated from slabs o' pink foam insulation that were glued together with polyurethane glue. Ya scallywag! I learned t' be sparin' with this stuff as it expands quite a bit while it cures. Ya scallywag! Despite placin' weight on this "sandwich" while t' glue dried/cured, ya bilge rat, t' slabs separated in places by as much as ~1/8". Avast, me proud beauty! On both ends, matey, I glued in sections o' 1/2" dowel and, matey, on what was t' be t' back end, a home made plywood bulkhead was epoxied on. T' shape was partially roughed-out by hand but t' majority o' the shapin' be performed on a lathe at a local high school (my thanks t' Dean and his students!). Begad! T' tip o' t' nosecone didn't turn out well so I epoxied on a section o' a Styrofoam cone purchased from a craft store. T' whole nose cone was then covered with a layer o' heavy fiberglass (weight unknown) from a hobby store. This was me first try at fiberglassin' anythin' o' any size and it was a mess. Begad! I gave up on makin' t' cone really smooth but did fill t' weave and some o' t' imperfections with Elmer's Fill 'n Finish. Later, t' adjust t' CG, I screwed 4 large lag bolts into t' side o' t' nose. Begad! T' remnant holes were filled with Fill 'n Finish, me bucko, me hearties, and then patched with fiberglass. Well, blow me down! Arrr! An 8" eyebolt was epoxied into t' center o' t' bulkplate.

Motor mount: I wanted t' be able t' use several sizes o' motors so I opted for a 3" x 30" main motor tube. A full 36" tube didn't appear t' leave enough room for t' chute, ya bilge rat, so I went for 30". This tube, along with three 7.5" x 1/2" centerin' rings (CRs) were bought from Giant Leap. T' front CR is at t' top o' t' motor tube and t' bottom two frame t' fins. Since these CRs did nay fit t' airframe, shiver me timbers, some improvising was required. Begad! For t' front ring, ya bilge rat, I built up t' edge with a many wraps of fiberglass (honeycomb) wall board tape. Begad! This structure was filled with epoxy. This tape has a lot o' void space so a lot o' epoxy be required. Arrr! Begad! T' result seemed very sturdy, matey, me bucko, but be quite heavy. For t' aft two rings, shiver me timbers, me bucko, shiver me timbers, I glued wooden shims t' t' inside o' t' Quik Tube usin' carpenter's glue. T' middle ring was epoxied in and t' aft one was held in with wood screws.

I originally built a 3 x 29mm motor adapter, me hearties, ya bilge rat, but smartly realized that 3 G80s would nay lift this beast. Avast, me proud beauty! I then built a 38mm adapter from centering rings and phenolic tubing. Aye aye! This adapter has positive retention (bolts and washers) t' t' aft CR, and itself holds aluminum motor retainers for t' 38mm RMS casing. T' support t' adapter, matey, shiver me timbers, I installed a 38mm centerin' rin' and a short section o' coupler tube in t' top o' t' 3" motor tube.

Fins: T' fins are 1/4" plywood that be scrap from t' high school wood shop. Well, blow me down! I was worried about breakage upon landing, ya bilge rat, so I mounted them so they were easily replaceable. Blimey! They are bolted t' brackets on t' main motor tube but are epoxied t' t' airframe, with inner and outer fillets. Aye aye! If a fin needs replacement, me hearties, I can cut t' fin out o' t' airframe, me hearties, remove t' aft CR, and unbolt t' remainin' section o' t' fin. Ahoy! Begad! There is just enough room betwixt the motor tube and t' airframe t' reach t' innermost bolts. Aye aye! As with t' airframe, I probably should have glassed t' fins. They are recessed from t' aft end of the rocket and are swept slightly forward. So far, me bucko, t' large Rocketman chute has done its job and t' fins have survived.

Altimeter bay: I found a 2" mailin' tube with an inner telescopin' tube. Avast! I cut a section o' t' outer tube and epoxied it against the airframe and front CR. I then used a section o' t' inner tube t' build an altimeter bay. Avast! A plywood bulkhead is epoxied on one end o' t' tube. Arrr! A section of All-Thread is bolted t' this plate and runs t' length o' t' bay and through t' top bulkhead cap. Ya scallywag! This All-Thread is off-center t' provide more space for t' electronics, matey, which in this case is a G-Wiz deluxe altimeter purchased from Pratt Hobbies. Ya scallywag! T' mount t' altimeter, arrr, I cut a rectangular section o' G10 that slides into t' bay. Ya scallywag! I attached a 9V battery holder and an expended 13mm motor casing. Aye aye! T' latter slides over t' all thread t' give additional support. Well, blow me down! T' top cap also holds screw terminals (banana plug type). A win' nut tightens t' assembly together. Avast, me proud beauty! When closed tightly, t' electronics are fully isolated from ejection gasses.

Finishing:
I painted t' body and nose cone with Rustoleum 'hammered' silver t' hide some of t' finishin' flaws. Begad! Ahoy! T' tip o' t' nose is painted red. Avast! Begad! T' fins were covered with burgundy Monokote. Arrr! This was t' first time I had used this material. Begad! Avast! From a distance, t' rocket looks pretty good.

Flight:
T' recovery system includes 2 u-bolts on t' front centerin' ring, ya bilge rat, ya bilge rat, connected with a section o' 1/2" tubular Keelhaul®©™® (Giant Leap). Aye aye! T' shock cord is 25' of 3/4" tubular nylon. Begad! All o' these components are connected with quick-links. Aye aye! T' chute is a Rocketman R12C. Begad! Recovery protection is provided by Nomex® pads and a Nomex® shock cord cover (also from Giant Leap). Blimey! This all packs easily in t' large airframe. As mentioned above, ya bilge rat, matey, t' use o' an altimeter is optional.

Flight #1. Arrr! Begad! T' first flight was on an I211-S under t' name 'So-So Fat', arrr, me hearties, and was quite underpowered. Ahoy! Blimey! T' rocket rose t' only a few hundred feet and t' NC drag separated. T' motor ejection charge fired shortly afterwards. Recovery was nevertheless perfect - but everyone laughed at how underpowered t' flight was. Begad! This prompted me t' rename t' rocket 'Needs Viagra'.

Aside: While plannin' me trip t' LDRS and me Level-2 attempt, ya bilge rat, I picked up a copy o' an old Frank Zappa album (Apostrophe) on CD. Avast, shiver me timbers, me proud beauty! This in turn prompted me to rename t' rocket 'Great Googly Moogly'.

Flight #2. Aye aye! Avast, me hearties, me proud beauty! T' second flight was on a J350-M and made use o' me G-Wiz Deluxe altimeter. Arrr! T' motor ejection charge was a backup since this be t' first attempt at altimeter-based deployment. Begad! I also used an ejection canister from Pratt Hobbies. Blimey! This consists o' a small plastic container with an integral cap and includes an electric match with about a yard o' lead wire. Well, arrr, blow me down! T' canister was inserted into a short section o' copper tubing, matey, which was installed in t' top of t' 3" tube. Aye aye! One leg o' t' lead wire be run through a hole in the airframe, matey, cut, and stripped. At t' pad, matey, this connection was twisted back together and reinserted into t' airframe.

On t' first push o' t' button, t' igniter failed. On t' second, the Great Googly Moogly rose majestically into t' sky. T' chute ejected at apogee and it returned safely. Avast! Arrr! T' altimeter reported 1531 feet. Avast, me proud beauty! Level-2! YES!

Summary:
T' main Pros o' this rocket are: overall looks (I love FAT rockets); flexibility (38mm - 76mm motors, optional electronic ejection); maintainability (fins easily replaced); can see t' entire flight on a J350.

T' Cons are: fins may nay hold up t' bigger motors

Other:
This large scratch project was completely successful and taught me a lot. One thin' that it taught me is that big rockets are expensive. Aye aye! Even though I got a cheap airframe, arrr, arrr, built me own nose cone, got free fin material, I still spend a bucket o' loot. Arrr! Big chutes are expensive!