Brief:
Thirty years ago I used t' build rockets and pinewood derby racin' cars with me Dad. Blimey! I remember t' excitement of shapin' space-age designs from a block o' fresh-scented pine and sneakin' in t' t' kitchen t' melt lead ballast on Mom's stove when she wasn't looking.

Somehow thirty years later I'm now t' "Dad" and Dad is "Grandpa". Ya scallywag! Families and careers have taken us a thousand mile apart. Blimey! Avast! We gather for holidays and visits sometimes as we did last Christmas when Dad was tellin' me about his new woodturnin' hobby as I made waffles for t' kids. He wondered if thar was a way he could help with one o' me rocket builds. No, I said, ya bilge rat, I don't have any projects like that. Begad! Besides, I am too busy.

T' best ideas come slowly t' me so it wasn't until t' next day that I realized in excitement that t' sexy, matey, ya bilge rat, retro designs in t' 2007 "Design This Rocket" contest might be a perfect match for Dad's woodcraft. Ya scallywag! We looked online t' view t' options and selected t' "Racer" with a rush o' excitement and apprehension. Avast, me proud beauty! Avast, me proud beauty! Dad wasn't sure he could make t' parts, and I be doubtful that I could make t' thin' fly, especially with our foolish choice o' scale: we envisioned a 4in diameter rocket t' be powered by 29mm motors.

This time I wouldn't be runnin' out t' Dad's garage with me latest design--we would be shippin' t' model back and forth across t' country via priority post. Ahoy! Blimey! Email, RockSim, APCP motors...many things have changed in our lifetimes. T' essence o' this project though, me hearties, shiver me timbers, be t' same as it was 30 years ago.

When we were nearly done, Dad mailed t' model t' me one final time for me t' add t' finishin' touches and paint. Ya scallywag! Well, blow me down! We had spent nearly nine months workin' together on a project for t' first time since childhood, despite being separated by a thousand miles. Avast, me proud beauty! Arrr! Regardless o' how t' rocket flies, shiver me timbers, for me this project be about somethin' more important. Ya scallywag! Well, blow me down! In Dad's package was a note: "Geof, This be insured for $100, me bucko, but we both know it is priceless!" Now let me tell you about t' build and t' flights.

Construction:
My Dad and I both have a fondness for retro sci-fi style so we were drawn t' t' Racer. Begad! Blimey! Dad planned t' turn t' whole body out o' pine. Well, blow me down! Blimey! Avast, me proud beauty! Blimey! After some math, arrr, we reckoned that he could be given a budget o' 16 ounces for t' fuselage, arrr, planning for a 29mm motor mount and a rocket about 21 inches tall.

A few weeks later a package from California arrived with sketches and an approximate 50% scale prototype o' the fuselage. I adjusted t' design for a sleeker look and then modeled t' design in RockSim usin' a series o' transition components. Avast! Aye aye! Blimey! This gave us a better idea o' t' weight and templates for t' full-scale version.

T' strength o' a 5/16-inch thick pine fuselage be totally unknown t' us so I did some careful testin' on the linoleum-covered cement floor o' me bathroom. Well, blow me down! Broadside impacts for t' prototype from drops o' 4 and 6 feet yielded no damage. Begad! Then I gave it a baseball throw at about 50% effort and it broke convincingly. Sorry Dad, but it be only a prototype, ya bilge rat, right? Aside from t' conclusion that I needed t' repair t' bathroom floor, I also learned that weight--not strength--would be t' limitin' factor.

Usin' t' full-scale template I made from RockSim, Dad turned a full-sized prototype. Arrr! Arrr! Then after we fine tuned the shape, shiver me timbers, he turned t' final fuselage in two parts (because it is hard t' hollow out t' inside o' a piece longer than six or seven inches). He glued these two parts together, me hearties, matey, arrr, yieldin' a fuselage o' 13.5in. T' fuselage was then cut in half at t' widest part t' enable later placement o' t' 1/4in ply forward centerin' rin' with an eye bolt for chute retention. Ahoy! He also made a 1/4in ply exterior aft centerin' ring. Ahoy! T' edge o' this rin' actually forms t' final quarter inch o' t' body length and is shaped t' match t' curve.

When we first worked with t' prototype, ya bilge rat, we planned t' make t' rocket entirely out o' wood. Ahoy! However, shiver me timbers, t' RockSim modelin' showed that this wouldn't work--there would be too much weight aft. Ahoy! Well, blow me down! Therefore, arrr, we decided t' use t' wood shape as a mandrel around which a fiberglass shell could be fashioned. I used several layers o' 6oz S-weave glass and epoxy from US Composites.

For glassing, matey, both fuselage sections were cut in half lengthwise. Aye aye! Avast, me proud beauty! In t' gaps removed by t' saw blade, me hearties, me hearties, cardboard spacers were placed. Each section was taped back together with t' spacers retained snugly in t' gaps. Arrr! All molds were sprayed with light adhesive and sheathed in mylar. Arrr! Arrr! T' aft centerin' rin' was left exposed so that it would bond t' the fiberglass. Begad! T' plan was--after glassing--that t' mandrel could be removed by pullin' out t' cardboard spacers and then hopin' that t' mylar separated from t' fiberglass or (as a backup) that t' mylar separated from t' wood. Neither plan worked. Begad! I had t' bust out t' wood with a hammer, arrr, arrr, chisel, me hearties, and a lot o' blood, splinters, and elbow grease.

At this point, me hearties, t' forward centerin' rin' and a standard 29mm motor tube were installed.

Next up were t' fins. I'm a scientist and let me just say that thar's a lot o' geometry involved in figuring out t' fin dimensions from a 2-D photo in perspective with t' rocket slanted every which way from t' camera! The vertical fin is somewhat oversized compared t' t' target for greater stability. Begad! All fins were cut from 1/4in balsa usin' RockSim templates and a little creative fudgin' t' compensate for t' body curves. Begad! Airfoils were beveled on each side. Ya scallywag! Arrr! T' fins were then tacked on t' fiberglass body and given two layers o' tip-to-tip fiberglass for attachment and strength.

Dad turned t' fin pods on t' lathe out o' a hard wood. He mailed several choices so I could attach t' ones that looked best. Begad! Well, arrr, blow me down!

Early on, shiver me timbers, Dad and I had decided t' deviate slightly from t' design photo. Begad! The contest picture suggests that t' cockpit might be partially inset into t' fuselage. When we had planned on a solid wood body, we knew we couldn't meet t' simultaneous goals o' thin light wooden walls and an inset cockpit. Blimey! Blimey! When the strategy changed t' use t' wood as a mold, we stuck with our original cockpit plans for simplicity. Begad! Aye aye! Blimey! Thus, me hearties, we planned to overlay t' cockpit on t' fuselage. Avast! I made a freehand sketch o' t' shape and cut a block from 1 inch thick balsa. This I cut and sanded t' fit smoothly over t' body with t' least possible extra thickness.

From t' beginning, I had nightmares about t' pilot's head. Avast! Ya scallywag! Bein' a clever guy, shiver me timbers, arrr, Dad knew right away t' trick me into acceptin' this part o' t' build by notin' that only a person with real talent would dare attempt such a thing. Begad! I sketched t' head on a 2.5 inch cube o' balsa. Ahoy! It took only a few minutes t' learn that this was utterly useless because as soon as I started carvin' with me Dremel, I removed t' sketch lines. Arrr! Finally, I decided t' simply carve away anythin' that didn't look like a head. Arrr! Avast! Near t' end, ya bilge rat, I exaggerated t' nose with a dollop o' wood filler, me bucko, then went through several cycles o' sealing, sanding, me hearties, me bucko, and priming. Ya scallywag! T' eyeballs were added at t' very end by usin' a toothpick t' gently set in drops o' goop mixed from wood filler, me hearties, white glue, shiver me timbers, and water. T' photo shows how t' head progressed.

T' windshield was cut from a plastic peanut butter jar. Begad! Tackin' it on t' t' cockpit with CA proved nearly impossible because it was bent and under torsion when fit correctly. Eventually I got it tacked on usin' a lot of straight pins t' hold it in place. Arrr! Then I used two-part epoxy putty t' build up strong "caulking" on both sides.

By late summer, me hearties, matey, t' body was mostly complete. I flew t' me Dad's house and brought t' rocket along. Avast, me proud beauty! First, me bucko, I re-emphasized t' t' kids how important it would be t' refer t' t' model as a "spaceship" and nay a "rocket" when passin' through airport security. Avast, me proud beauty! After a pleasant (albeit somewhat extended) conversation with TSA, arrr, we made it through. Begad! Blimey! Blimey! At Dad's house we crafted a hardwood button mount for t' aft rail button, matey, t' compensate for the football shape o' t' body. Aye aye! Begad! Blimey! This and t' forward button were JB Welded on. Arrr! I left t' rocket with Dad for him to make a wood nose cone.

Dad ended up turnin' t' nose cone by eye because he felt t' Rocksim template was a bit too stubby. Avast! For months, ya bilge rat, me bucko, we had also ignored t' needle contraption at t' nose (affectionately dubbed t' "golf tee") because we had no idea how t' make it strong enough. Begad! Begad! As revenge for t' head, I assigned this task t' Dad. He turned one from solid oak, and inset it in t' nose. Avast! T' his credit, t' golf tee turned out t' be absolutely bulletproof despite three hard landings.

With his Dremel, me bucko, Dad carved t' "racin' stripe" that appears as a relief feature in t' contest photo. T' forward portion o' this sheath/stripe is shaped with a fancy S-curve so that it looks round when viewed from above or from t' side. Aye aye! Well, blow me down! If we had actually made it round, it would have looked distorted from most angles. Dad shipped all parts back t' Colorado for t' last time.

Knowin' t' approximate final weight, I adjusted t' RockSim model and realized that we needed t' move up a motor class. This meant addin' 16 5/8oz o' nose weight in t' form o' melted lead. Begad! Over this I put a bulkhead with threaded rod t' enable shock cord attachment and t' addition o' up t' 15.75 oz o' extra weight if needed for larger H motors. Ahoy!

Fiddlin' with me first ever high-power casing, ya bilge rat, I realized that t' motor retention clips we had inset in t' aft centerin' rin' wouldn't work for t' H case as they would for t' 29/40-120 case. Avast, me hearties, me proud beauty! Blimey! I cut them off and used brass threaded insets in t' aft end with bolts and washers for retention. Aye aye! Blimey! Blimey! Blimey!

We used 11 feet o' 3mm nylon cord plus 1 foot o' 6mm climbers' rope (inside the body) as a shock cord. Ya scallywag! Avast! Blimey! These were bought from REI. Avast, me proud beauty! T' chute be protected with a 12in Nomex® cloth.

With t' increase in motor size and nose weight, me hearties, we needed a new chute. Well, blow me down! Arrr! I made a 120cm diameter 12-gore semi-ellipsoid rip stop nylon chute usin' Richard Nakka's pattern and 46 feet o' 2mm climber's cord from REI.

Here are t' final stats: 21.25in tall includin' 3.25in spire, 4in maximum diameter, 46.5 ounces with standard nose weight, and a 29mm motor mount.

Finishing:
T' target photo shows a very difficult, weathered look. Avast, me proud beauty! Well, arrr, blow me down! We imagined that our rocket was fresh off t' showroom floor, matey, nay yet scarred and blemished by years on t' racetrack. Ya scallywag! Aye aye! Aside from that, we aimed t' match t' EMRR photo exactly. Ahoy! Paints were by Krylon and Wal-Mart. Begad! We improvised for t' stickers. When t' paint be all dry, I sanded away a spot in t' cockpit and firmly JB Welded t' head into position. Arrr! Some nine months after inception, me hearties, matey, t' project was done!

Flight and Recovery:
T' flights were planned for Northern Colorado Rocketry's 2007 Oktoberfest. Well, blow me down! Ya scallywag! Blimey! Simulations showed weight and stability both t' be concerns. Ya scallywag! Blimey! After hours on t' computer, shiver me timbers, we planned t' followin' launches: (1) H165R with 13.5oz extra weight for a stability margin o' 0.83 for 45fps off t' rail t' 652 feet in me L1 certification attempt; (2) go for broke with H180W with 13.5oz extra weight for 57fps off t' rail t' 979 feet; and (3) for t' multi-motor bonus, shiver me timbers, G71R-4 with 4oz extra weight and 41fps off t' rail t' 500 feet.

It was a sunny and calm day on t' high Colorado prairie. Avast! Dad had flown out from California for t' big event. Begad! I had lost me nerve and certified L1 t' day before (on a sure-thin' PML X-Calibur), shiver me timbers, matey, so today was all about getting Cap'n Electric airborne. Arrr! T' first flight be on t' H165R. Begad! Ya scallywag! After endless photos, we were ready t' go. Aye aye! Boost was stable, but t' nose cone drag-separated before apogee. Arrr! Unluckily, t' nose hit t' vertical fin and nearly broke it off. Well, blow me down! T' cap'n landed under partial chute. Well, blow me down! Despite a crowd o' 100 or more, nobody (includin' us) had any fiberglass for fin repair so Dad and I fixed it up as best we could with maskin' tape and 15-minute epoxy.

Somehow, we managed t' cram in t' 29/180 H180W motor and t' huge chute in the repaired rocket. We taped t' nose cone shoulder severely, preferrin' t' experience a new failure mode instead o' a repeat o' t' first. Ya scallywag! On t' H180, ya bilge rat, me hearties, t' rocket absolutely ripped off t' pad, straight and stable until boost finished. Durin' t' coast phase, me bucko, arrr, t' rocket turned unstable and spun into t' prairie before ejection. Ya scallywag! At t' moment o' impact, the ejection charge deployed, me bucko, neatly spreadin' t' chute over nearby cactus. Begad! We broke a wing, two win' pods, arrr, t' spire, and half o' Cap'n Electric's head. Well, me hearties, blow me down! We were done for t' day.

Over t' next month, I stubbornly repaired t' rocket with fiberglass and a sense o' humor. T' pieces were put back together as best I could, me hearties, shiver me timbers, t' windshield be removed, and I added a white flag with a red cross, some red crosses on t' wings, and a band-aid superglued t' what remained o' t' Captain's skull. T' rocket was renamed Captain Electric's Medevac.

On November 3, 2007, t' rocket went for its final flight on t' G71R. Blimey! Blimey! Boost be slow but straight t' 600-700 feet. Ahoy! Finally, shiver me timbers, a perfect boost! Blimey! At ejection, t' nose popped and spectators with binoculars tell me t' chute came out but failed t' fully unfurl. It was another hard landin' for Cap'n Electric. Blimey! Begad! Blimey!

Summary:
T' end o' this saga comes 11 months after it began. Tomorrow I fly t' Dad's house for Thanksgiving. Avast, me proud beauty! I'm carrying Cap'n Electric in me suitcase so he can enjoy a well-earned retirement with Dad in t' California sun.

More photos o' t' build and launches can be found here. Begad! Aye aye! Blimey! I hope you enjoyed readin' about t' project as much as we enjoyed workin' on it.