Long before I was buildin' rockets, a very small, matey, tumble recovery rocket be introduced by Estes. Avast! It was t' 1/2A powered Astron Sprite. Avast, me proud beauty! Aye aye! T' those nay familiar with this rocket, arrr, I would like t' explain a very unique characteristic o' this design. Well, blow me down! When scaled up enough t' be powered by a high impulse motor, matey, t' air flowin' past t' fin rin' creates a high-pitched whistle when launched. Aye aye! 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, durin' t' second launch o' me 4-inch airframe based Superscale Sprite, t' whistle was clearly heard by all those in attendance. Arrr! Aye aye! As t' rocket arced over, ya bilge rat, matey, arrr, even before t' ooh’s and aah’s had subsided, it was obvious that I had a major deployment problem…there was none! T' Sprite raced back t' earth, and a fact that I was previously unaware of, ya bilge rat, became perfectly clear. Ahoy! Avast! This amazin' rocket whistled comin' down, matey, arrr, louder than when it was goin' up. Blimey! Ya scallywag! In fact, it whistled right up until it impacted with t' rock-hard Pennsylvania soil at our Jones Farm launch site. Blimey! Well, me hearties, blow me down! Naturally, me fellow rocketeers were quick t' offer their condolences, ya bilge rat, but I be more amused by t' memory o' it whistlin' back t' Earth. Avast! Well, blow me down! 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, almost immediately began urgin' me t' build another one. Due t' t' amount o' work that be involved in t' project, me hearties, arrr, I was unwillin' t' commit t' such an ambitious undertaking. Avast, me proud beauty! Over t' next twelve months or so, matey, I did acquire a piece o' 15-inch diameter cardboard drum, ya bilge rat, which would make a fine fin ring, me bucko, arrr, (my first one be 11.5-inch diameter) and a 24-inch long section o' 5.5-inch airframe. Begad! This would amount t' a 7.3X version o' t' original Estes model. Ya scallywag! Begad! I also purchased a 3 x 6 x 36-inch block o' balsa wood, that I planned on usin' t' turn a scale nosecone. Begad! Arrr! I cut t' block in two and laminated them together t' make a nice 6 x 6 x 18-inch blank, matey, and then set it aside, where it would sit for almost another year. Avast! One weekend in February o' 2001, ya bilge rat, I was turnin' a couple wooden nosecone patterns for a Tripoli Pittsburgh group project, t' Gloria Mundi III. After completin' this task, I decided t' go ahead, shiver me timbers, matey, ya bilge rat, and turn t' new Sprite nosecone from t' balsa block that had been collectin' dust. Arrr! Avast! After finishin' t' outside form, me hearties, 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. Aye aye! I cut a bulkhead from .5-inch plywood t' seal t' openin' that was epoxied into place after fillin' t' cone with expandin' foam. Aye aye! Before I knew it, me bucko, t' nosecone be complete, matey, and I be plannin' me next steps o' t' project, that would soon come t' be known as "T' Lord o' t' Rings."

Next, me bucko, I carefully cut a 5.5-inch section o' t' cardboard drum, ya bilge rat, ya bilge rat, and prepared it t' be reinforced with a few layers o' fiberglass cloth. Begad! I opted for two wraps o' 6-ounce woven cloth and a finishin' wrap o' 1.5-ounce cloth. T' last layer was done solely t' make it easier t' get a smooth surface for painting. Avast, me proud beauty! Arrr! I used t' same process for t' airframe, which, ya bilge rat, although it was made o' flexible phenolic, 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. Arrr! Begad! Two centerin' rings were cut from t' same material, also usin' patterns created from RockSim. Arrr! 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. Avast! Ahoy! T' forward rin' be epoxied t' t' motor tube, and this assembly was installed into t' slotted body tube. Begad! With t' rear-centerin' rin' temporarily put in place for alignment purposes, shiver me timbers, ya bilge rat, t' fins were epoxied into place. Ahoy! T' aft rin' was then removed, shiver me timbers, me hearties, and internal fillets used at both t' motor tube and t' inside o' t' body tube. Begad! 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. Blimey! Ya scallywag! Before permanently installin' t' rear-centerin' ring, t' remainder o' t' cavity be filled usin' 2-part expandin' foam. Begad! 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 be now time t' attach t' fin rin' and fin caps. Aye aye! Blimey! Careful attention was paid t' t' alignment o' t' caps so that minimal fillin' o' gaps be necessary. Well, blow me down! Blimey! When t' assembly was completely dried, ya bilge rat, 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. Ya scallywag! I used grain filler on t' plywood fins, and after some extensive sanding, was finally ready t' prime t' entire rocket. Begad! Blimey! More sanding, fillin' and primin' followed, o' course, me hearties, until I be ready t' paint. 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, 2001. Aye aye! Accordin' t' simulations done in both RockSim and wRASP, it reached a max altitude o' approximately 1900 feet on an Aerotech I284 reload. Unlike me first Sprite, me hearties, t' whistlin' only occurred on t' way up.