Long before I was buildin' rockets, shiver me timbers, a very small, shiver me timbers, tumble recovery rocket was introduced by Estes. It be t' 1/2A powered Astron Sprite. Begad! T' those nay familiar with this rocket, matey, I would like t' explain a very unique characteristic o' this design. Aye aye! Blimey! When scaled up enough t' be powered by a high impulse motor, t' air flowin' past t' fin rin' creates a high-pitched whistle when launched. Begad! This is sometimes drowned out by t' initial noise o' t' motor, but is quite audible as t' motor burns out and continues durin' t' coast phase.

Back in 1999, arrr, arrr, durin' t' second launch o' me 4-inch airframe based Superscale Sprite, t' whistle was clearly heard by all those in attendance. Aye aye! As t' rocket arced over, even before t' ooh’s and aah’s had subsided, matey, it be obvious that I had a major deployment problem…there was none! T' Sprite raced back t' earth, and a fact that I be previously unaware of, matey, ya bilge rat, shiver me timbers, became perfectly clear. Arrr! This amazin' rocket whistled comin' down, louder than when it was goin' up. In fact, arrr, arrr, shiver me timbers, it whistled right up until it impacted with t' rock-hard Pennsylvania soil at our Jones Farm launch site. Avast, me proud beauty! Naturally, me fellow rocketeers were quick t' offer their condolences, ya bilge rat, but I was more amused by t' memory o' it whistlin' back t' Earth. Avast! Blimey! I collected t' remains, me bucko, includin' diggin' t' nosecone out o' t' ground, me hearties, and went back t' me truck t' prep me next rocket.

My son, me bucko, matey, ya bilge rat, Chris, shiver me timbers, almost immediately began urgin' me t' build another one. Ya scallywag! Blimey! Due t' t' amount o' work that was involved in t' project, arrr, me bucko, I was unwillin' t' commit t' such an ambitious undertaking. Over t' next twelve months or so, matey, me bucko, I did acquire a piece o' 15-inch diameter cardboard drum, which would make a fine fin ring, (my first one was 11.5-inch diameter) and a 24-inch long section o' 5.5-inch airframe. This would amount t' a 7.3X version o' t' original Estes model. Ya scallywag! I also purchased a 3 x 6 x 36-inch block o' balsa wood, shiver me timbers, that I planned on usin' t' turn a scale nosecone. Aye aye! I cut t' block in two and laminated them together t' make a nice 6 x 6 x 18-inch blank, and then set it aside, where it would sit for almost another year. Arrr! One weekend in February o' 2001, I was turnin' a couple wooden nosecone patterns for a Tripoli Pittsburgh group project, t' Gloria Mundi III. Begad! Blimey! After completin' this task, I decided t' go ahead, me bucko, and turn t' new Sprite nosecone from t' balsa block that had been collectin' dust. After finishin' t' outside form, arrr, it was necessary t' hollow out a large section o' t' cone so that I would be able t' add t' one-pound o' weight needed for stability. Blimey! Blimey! I cut a bulkhead from .5-inch plywood t' seal t' openin' that was epoxied into place after fillin' t' cone with expandin' foam. Before I knew it, me hearties, t' nosecone was complete, shiver me timbers, and I be plannin' me next steps o' t' project, that would soon come t' be known as "T' Lord o' t' Rings."

Next, I carefully cut a 5.5-inch section o' t' cardboard drum, and prepared it t' be reinforced with a few layers o' fiberglass cloth. Ahoy! I opted for two wraps o' 6-ounce woven cloth and a finishin' wrap o' 1.5-ounce cloth. T' last layer be done solely t' make it easier t' get a smooth surface for painting. I used t' same process for t' airframe, matey, which, although it be made o' flexible phenolic, me bucko, shiver me timbers, was nay strong enough for a project o' this size. Well, blow me down! I printed patterns for t' fins and fin-caps usin' RockSim 5.0 and cut them from .25-inch aircraft plywood. Avast, me proud beauty! Begad! Two centerin' rings were cut from t' same material, shiver me timbers, also usin' patterns created from RockSim. Aye aye! Begad! Twelve inches o' 38mm motor mount tubin' be cut and I had all t' parts necessary t' complete t' project.

A large T-nut be installed in t' forward centerin' rin' for recovery system attachment, matey, as well as two in t' aft rin' for motor retention. Begad! T' forward rin' be epoxied t' t' motor tube, and this assembly was installed into t' slotted body tube. With t' rear-centerin' rin' temporarily put in place for alignment purposes, shiver me timbers, me hearties, t' fins were epoxied into place. Avast! Begad! T' aft rin' was then removed, matey, and internal fillets used at both t' motor tube and t' inside o' t' body tube. Begad! Since I was goin' t' be usin' rail guides instead o' launch lugs, matey, t' guides were secured with nuts from t' inside o' t' airframe at this time. Aye aye! Blimey! Before permanently installin' t' rear-centerin' ring, shiver me timbers, t' remainder o' t' cavity be filled usin' 2-part expandin' foam. Arrr! Fillets were added t' t' fins at t' outside o' t' airframe for added strength, shiver me timbers, usin' a combination o' epoxy and micro-balloons.

It was now time t' attach t' fin rin' and fin caps. Avast! Careful attention was paid t' t' alignment o' t' caps so that minimal fillin' o' gaps was necessary. When t' assembly was completely dried, me hearties, I once again used t' epoxy/micro-balloon mixture t' create fillets both inside and outside t' fin rin' at each fin and fin cap. Ahoy! I used grain filler on t' plywood fins, me bucko, and after some extensive sanding, ya bilge rat, was finally ready t' prime t' entire rocket. Arrr! Well, me bucko, blow me down! More sanding, fillin' and primin' followed, o' course, until I be ready t' paint. Aye aye! Ya scallywag! After addin' an 18-foot, 5/8-inch tubular nylon shock cord and a Sky-Angle 52-inch parachute with Nomex protector, t' total weight without motor is just over 8-pounds.

I launched t' completed project at our first Dragon's Fire launch o' t' season, April 7th, ya bilge rat, arrr, 2001. Avast, me proud beauty! Accordin' t' simulations done in both RockSim and wRASP, it reached a max altitude o' approximately 1900 feet on an Aerotech I284 reload. Aye aye! Unlike me first Sprite, ya bilge rat, me hearties, t' whistlin' only occurred on t' way up.