Brief:
T' EXB was me L3 project. Ya scallywag! Ahoy! Materials used t' build this rocket were those in the form o' Carbon Fiber, me bucko, matey, S-Glass, Composite fin material and phenolic tubing. T' main technique in construction o' t' air frames was vacuum bagging. Along with t' rocket I built a custom launch pad t' make me L3 project complete. Ahoy! Blimey! For those that ask what is an EXB. T' EXB is a 1/4 scale o' t' Nike Zeus recognized by most as t' Nike-X. Aye aye! Begad! It was built with several goals in mind. First was t' build it strong and durable so that it may last for a while and get many flights. Ahoy! Arrr! Second was t' design it t' handle t' largest o' 98mm motors in commercial and experimental formulations. As for t' name EXB, me bucko, me bucko, well you will have t' figure that one out on your own.

Construction:
T' parts list is pretty long but I will give you a list o' t' basics. Well, blow me down! Blimey! The tubin' order consisted o' three 48" long sections o' 7.5" diameter airframe, shiver me timbers, matey, one 48" long section o' 7.5" coupler tubin' along with two standard 12" couple tubes, me hearties, one 48" long section o' 3.9" motor tubing. Avast, me proud beauty! Blimey! All tubin' is phenolic. Well, blow me down! Blimey! Aye aye! Blimey! T' fins are constructed from two materials. T' four lower fins are 3/8" thick Keelhaul®©™® composite material that were cut from two 12" x 36" sheets. Begad! The remainin' twelve fins are crafted from 3/8" thick birch plywood. Begad! There is a total o' 13 centerin' rings and bulk plates some o' which are made of composite material. Begad! T' nose is fiberglass. Avast, me proud beauty! Recovery is taken care o' by an RDAS, Altacc and two Skyangle Cert3 chutes attached by tubular Keelhaul®©™®.

The motor mount was first. Ahoy! Aye aye! All centerin' rings were trued and drilled for four sections o' all thread. Begad! Avast, arrr, me proud beauty! A nut and washer is placed on both sides o' each centerin' rin' and secured with Locktite.

T' fins were measured and cut. Avast, me proud beauty! T' lower fins were trimmed with 3/8" thick basswood. Ya scallywag! Begad! There is a total o' 16 fins on this rocket. Begad! All fins are vacuum bagged with one lay up o' 5.7oz carbon fiber and one lay up o' 4oz s-glass.

Once t' fin can/motor mount be complete I started on t' airframes. Avast, me proud beauty! Blimey! The airframes were done in t' same fashion as t' fins. This time with a double lay up o' carbon and a double lay up o' s-glass. Well, blow me down! Blimey! After t' air frames were in their bags, me bucko, they were placed into a curin' oven. Arrr! Blimey! I would bag and cure one section at a time. Ahoy! Blimey! T' airframe and nose cone were slotted with a router and test fitted with t' proper set o' fins.

T' avionics bay is a standard design. Aye aye! Flight computers are accessed via a cover on t' front o' t' rocket. Begad! T' inside o' t' e-bay is bagged with a triple lay up o' carbon for extra protection.

Finishing:
After all subsections were assembled, me bucko, any piece that had a fin joint got filled. Aye aye! Fiberglass was then laid across t' two lower fin groups. Ahoy! The "make it look good" process was done in t' automotive way. Aye aye! Avast, me bucko, me proud beauty! Filled and blocked down with metal glaze, arrr, primed and sanded, arrr, matey, base color sprayed, taped off and t' second color sprayed.

I now have a rocket with nothin' t' launch it off of. Remedy: build a launch pad. My pad is built o' steel square tubing. Blimey! Begad! T' base has a foot print of fifteen feet and a deck height o' three feet. Begad! T' rail is two sections of eight feet long 80/20 1515 T-slot. Arrr! These are mounted t' two sections of 1.5" square tubing. Well, blow me down! Avast, me proud beauty! T' tubin' is then backed by twenty feet o' antenna lattice. T' lattice rail assembly is attached t' t' base by four pillow blocks with a one inch steel shaft. Ahoy! This enables t' tower t' be laid over for the loadin' o' rockets. Begad!

SUCCESSFUL LEVEL 3 FLIGHT!

June 20, me bucko, arrr, 2004
Wayside, Texas
Rocket - EXB
Weight - 100 lbs
Motor - Aerotech M2400
Altitude ~5,000 feet

Bein' a scratch design, matey, t' recommended motor for it was t' bigger the better. Begad! That holds true for this one. Blimey! Blimey!

First flight was at Wayside, Texas for me L3 cert flight. Blimey! Arrr! For me first M flight, t' Aerotech M2400T was chosen. Arrr! T' flight was a success and I made my L3 cert. Aye aye! Aye aye! Altitude be measured as 4800' on t' RDAS and 5200' on t' Altacc.

Second flight be in Windom, Texas at t' NTHP event. Ahoy! Avast, shiver me timbers, me proud beauty! I decided I needed a bigger motor this time around. Ya scallywag! An M1939W was called up for duty on this one. Altitude for t' bigger M was 6300'. Blimey! Well, blow me down! There is an experimental N and possibly an O in t' near future for this rocket.