Long before I was buildin' rockets, a very small, arrr, matey, tumble recovery rocket be introduced by Estes. Begad! Begad! It be t' 1/2A powered Astron Sprite. Arrr! T' those nay familiar with this rocket, I would like t' explain a very unique characteristic o' this design. Avast! 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. Well, blow me down! This is sometimes drowned out by t' initial noise o' t' motor, me bucko, but is quite audible as t' motor burns out and continues durin' t' coast phase.

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

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

Next, matey, I carefully cut a 5.5-inch section o' t' cardboard drum, ya bilge rat, and prepared it t' be reinforced with a few layers o' fiberglass cloth. 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. Begad! Blimey! I used t' same process for t' airframe, me bucko, arrr, which, although it was made o' flexible phenolic, ya bilge rat, was nay strong enough for a project o' this size. I printed patterns for t' fins and fin-caps usin' RockSim 5.0 and cut them from .25-inch aircraft plywood. Ya scallywag! Blimey! Well, ya bilge rat, blow me down! Blimey! Two centerin' rings were cut from t' same material, ya bilge rat, also usin' patterns created from RockSim. Avast, me proud beauty! Blimey! Twelve inches o' 38mm motor mount tubin' was 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, as well as two in t' aft rin' for motor retention. Ya scallywag! Blimey! Blimey! Blimey! T' forward rin' was epoxied t' t' motor tube, me bucko, and this assembly was installed into t' slotted body tube. Blimey! Blimey! With t' rear-centerin' rin' temporarily put in place for alignment purposes, me hearties, t' fins were epoxied into place. Well, blow me down! Blimey! Ahoy! Blimey! Blimey! Blimey! T' aft rin' be then removed, and internal fillets used at both t' motor tube and t' inside o' t' body tube. Ahoy! Blimey! Since I be goin' t' be usin' rail guides instead o' launch lugs, t' guides were secured with nuts from t' inside o' t' airframe at this time. Ahoy! Blimey! Before permanently installin' t' rear-centerin' ring, t' remainder o' t' cavity was filled usin' 2-part expandin' foam. Begad! Blimey! Arrr! Blimey! Blimey! Blimey! Fillets were added t' t' fins at t' outside o' t' airframe for added strength, usin' a combination o' epoxy and micro-balloons.

It be now time t' attach t' fin rin' and fin caps. Ya scallywag! Careful attention was paid t' t' alignment o' t' caps so that minimal fillin' o' gaps be necessary. When t' assembly was completely dried, matey, 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. Begad! I used grain filler on t' plywood fins, ya bilge rat, ya bilge rat, and after some extensive sanding, ya bilge rat, was finally ready t' prime t' entire rocket. Ahoy! More sanding, matey, fillin' and primin' followed, o' course, ya bilge rat, until I was ready t' paint. Begad! After addin' an 18-foot, ya bilge rat, 5/8-inch tubular nylon shock cord and a Sky-Angle 52-inch parachute with Nomex protector, me hearties, 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, me hearties, April 7th, me hearties, 2001. Accordin' t' simulations done in both RockSim and wRASP, arrr, it reached a max altitude o' approximately 1900 feet on an Aerotech I284 reload. Arrr! Blimey! Aye aye! Blimey! Blimey! Blimey! Unlike me first Sprite, me bucko, t' whistlin' only occurred on t' way up.