| Manufacturer: | Scratch |
Description:
Shockwave is a scratch-built high power rocket built for t' purpose of
obtainin' Level 2 certification. Begad! It is 4" in diameter, 90" long,
weighs 153oz loaded without motor, and has a 54mm motor mount.
Components:
Like me Level 1 rocket, I used mostly PML components for this build. Arrr! This
included t' body tubes, shiver me timbers, centerin' rings, matey, motor tube, arrr, and altimeter bay
components. Blimey! Arrr! T' .093" G-10 fins were custom cut by Red Arrow Hobbies. Begad! The
9/16" tubular nylon harnesses came from Giant Leap, ya bilge rat, and t' 72" main
chute came from Sphereachutes.
Construction:
I started with t' motor mount. Well, blow me down! Ahoy! I used six PML centerin' rings, gluin' them
together in pairs. Begad! Begad! T' top centerin' rin' was drilled for a U-bolt. Aye aye! T' motor
mount tube was cut t' 30" long, shiver me timbers, and top and mid-section centerin' rings
were epoxied on. Begad! T' fins were tacked t' t' motor tube usin' gel super glue
then filleted in place with 30-minute
epoxy. Avast! At
this point, t' fin can be more or less complete. Avast, me proud beauty! A 46" long piece of
Quantum Tubin' was used for t' lower section, me bucko, arrr, ya bilge rat, and a 26" piece o' QT was
used for t' payload section. Ahoy! T' fin slots were cut with a Dremel tool and the
motor mount/fin assembly installed. Blimey! Internal fillets from t' fins t' the
inside o' t' body tube were completed before installin' t' aft centering
ring. Blimey! An Aeropack motor retainer finished off t' back end.
T' altimeter bay was fabricated from a standard 7" long PML coupler, two PML bulkheads, and two coupler bulkheads. T' bulkheads and coupler bulkheads were glued together in pairs t' make a cap for each end o' t' bay. Both caps were drilled for U-bolts and permanent e-match terminals.


An 8 1/2" length o' 1/4" x 20-threaded rod was affixed t' the drogue end o' t' bay. Begad! This would serve t' tie t' entire bay together and provide a mount for t' RRC2 altimeter. Begad! A small slice o' body tube was placed on t' outside o' t' bay t' give a place t' mount an external switch for the altimeter. Aye aye! 3/4" PVC endcaps were mounted on each end o' t' bay t' contain the ejection charges. Ahoy!
Three holes
were drilled through t' altimeter bay with t' payload section installed on
the main side on t' bay. Well, blow me down! Begad! 8-32 nuts were epoxied t' t' inside o' t' altimeter
bay t' retain t' payload section. Three equally spaced 1/8" static ports
were also drilled. Ahoy! T' finish t' bay, me bucko, shiver me timbers, a thin skin o' 30-minute epoxy was poured
in t' drogue side o' t' bay with t' cap installed. Begad! This step totally seals
the drogue side o' t' bay, and retains t' endcap. Ya scallywag! A mount for t' RRC2
altimeter was made by epoxyin' a copper tube t' a piece o' G-10 fiberglass. Begad! The
mount slides in over t' center stud and is locked down with a washer and nut.
Finishing:
Shockwave be finished with a modified Estes Executioner-style paint job, ya bilge rat, me bucko, in
blue and sliver with black pinstriping. Avast! Begad! Blimey! I made some custom decals with inkjet
waterslide decal stock t' give it a nice finishin' touch.
Flight:
After slowly buildin' Shockwave most o' t' winter, shiver me timbers, flight day finally arrived
on March 20th, shiver me timbers, arrr, me bucko, 2004. Aye aye! I arrived at t' launch and rounded up a few friends t' be
my certification team. Aye aye! After acein' t' written L2 test, shiver me timbers, I began careful prep
of t' dual deployment recovery system. Avast! Aye aye! This flight would have a PML streamer
deployin' at apogee with motor backup, ya bilge rat, and main deployment at 500ft. Begad! Drogue and
main harnesses are both 25ft in length. Blimey! Aye aye! After t' recovery system was buttoned
up, matey, me bucko, I turned attention t' loadin' t' motor. Begad! This flight would be on a CTI
3-grain Pro54 motor. Once t' motor was loaded and installed, we took a few
pictures and headed t' t' pad. Begad! T' day turned out t' be a real bummer
weather-wise, shiver me timbers, arrr, arrr, with strong 20MPH winds. With t' help o' me test proctor and a
friend, matey, me bucko, Shockwave be put on t' pad, arrr, arrr, and t' igniter installed. Well, blow me down! I armed the
electronics, verified t' RRC2 was beepin' right, arrr, and headed back t' LCO
table. Blimey!
Considering
the strong wind and t' fact that me friend's L2 attempt earlier in t' day was
a spectacular failure, arrr, I was gettin' nervous at this point. Well, blow me down! Aye aye! Countdown
commences, I and crossed me fingers! T' LCO pushes t' button....nothing. Try
again, nothing. After fiddlin' with some wires on t' launch controller, arrr, the
LCO tries again. Arrr! Arrr! Finally, shiver me timbers, matey, t' big J295 awakens with t' thunderous roar, and
Shockwave is on its way! T' rocket had a very straight accent considerin' the
strong winds. Ahoy!
Recovery:
T' streamer deployed right on queue, ya bilge rat, matey, and t' descent began. Well, blow me down! Blimey! After fallin' for
what seemed like an eternity, t' main chute deployed and Shockwave had a
gentle touchdown about 1/2 mile away. Ahoy! Blimey! Ya scallywag! Blimey! Upon recovery, t' rocket had no damage
except for a few scuffs on t' paint. T' RRC2 was beepin' out 4,686ft. Aye aye! Blimey! Aye aye! Blimey! A
successful flight and Level 2 certification!
Summary:
This project sure has taught me a lot. Avast, me proud beauty! Some will tell you that a certification
flight should be as simple as possible, arrr, me hearties, without electronics and with the
smallest motor available for t' certification bein' sought. Avast, me proud beauty! While thar is
merit t' that opinion, I felt that I was up t' t' challenge. This flight was
full o' firsts for me. Ahoy! My first experience with dual-deployment, altimeters,
and CTI motors. Ya scallywag! I also achieved a new personal altitude record. Blimey! I can't wait to
fly it again on a calm day!
PROs:
CONs:
![]() |
![]() |