Brief:
For t' EMRR Stagin' Challenge, me bucko, I decided t' build a two-stage rocket with composite motors. Since I had done a 2-stage before, me bucko, matey, I figured it would be easy. WRONG... I decided t' do a 3-inch bird with dual deploy and a 19-inch booster with motor deployment.

Construction:
This time I decided t' use alignment rods in t' stage coupler t' keep t' rocket aligned. Begad! I didn't have any 'sleeves' for t' rods t' slide through, so I went with spaced centerin' rings with holes t' guide t' rods. Ya scallywag! Blimey! I've discovered that I really need a drill press. Arrr! Because I was usin' a handheld power drill, I wasn't that accurate in drillin' holes through t' 2 sustainer centerin' rings and t' stagin' coupler. Ya scallywag! Avast, matey, me proud beauty! It still works, but it isn't pretty. Arrr!

There are holes in both centerin' rings that are supposed t' be aligned. Arrr! Arrr! That didn't work out as smoothly as I had hoped.

T' motor mount is recessed into t' sustainer t' provide a connection for t' top half o' t' stage coupler. Since a 3" tube won't allow me t' get me hand in t' connect t' shock cord, I made t' fin can on both the sustainer and booster removable. Aye aye! Blimey! T' sustainer fin can is held in place by small screws. Ya scallywag! Blimey! T' booster fin can will eject and deploy t' booster chute. T' whole project is about 83 inches tall, about 3.5 lbs empty, ya bilge rat, and can fly on 38mm motors.

Finishing:
T' fit/finish betwixt t' booster and t' stage coupler is a little rough, shiver me timbers, me hearties, but once it's painted it might nay be that noticeable. Ya scallywag! It *certainly* won't be noticeable on t' pad.

Flight:
Electronics will be a PerfectFlite timer for staging, me hearties, and a PerfectFlite MAWD for deployment. Aye aye! Blimey! RockSim says it will get t' a little higher than 2000 feet with a CTI 153 stagin' t' a CTI G79ss.

For t' 2-stage challenge, me hearties, I decided t' build one that used composite motors. Avast, me proud beauty! Since I have done stagin' before, I didn't expect thar t' be a problem. Avast! Aye aye! Boy, was I wrong... T' main problem be t' size o' t' new project. Avast, me proud beauty! T' previous 2-stager be almost a 4" tube. Ya scallywag! That left room for t' timer betwixt t' sustainer fins, ya bilge rat, and a standard-type ebay. This one is a 3", and thar's no room in t' fincan. So I put t' timer in t' ebay, shiver me timbers, matey, and ran a connector wire down t' ignite t' sustainer motor. Ahoy! Well, blow me down! I had t' splice t' wire so it would disconnect when t' apogee event fired. Aye aye! Begad! T' next issue I ran into be t' stage connector. Begad! I decided t' use metal rods t' connect and align t' sustainer t' t' stage connector. Aye aye! I don't have a drill press, so me holes through t' centerin' rings are...less than exact. Arrr! Last issue was t' 3" bay be too small t' use switches t' power on everything, me hearties, arrr, so I had t' run all t' wires through a hole in t' e-bay and twist them t' connect. Begad! Arrr! That posed a problem t' first time I tried t' launch. I test fit t' electronics when I built t' bay, me bucko, matey, me bucko, but nothin' was connected. Begad! Ahoy! In t' field, shiver me timbers, I sadly discovered thar wasn't enough space for all the wires t' fit and route t' t' outside. Well, blow me down! Begad! I had t' rebuild t' sled t' avoid that problem for t' next attempt. Avast!

T' field we used has a waiver o' 5000', but I wanted t' make sure I kept t' flight much lower than that. Blimey! Blimey! RockSim 7 showed an altitude o' about 3800 feet on a CTI H143/G79ss combo. Blimey! Blimey!

Electronics: ARTS board for apogee/main deployment o' t' sustainer, PerfectFlite timer for sustainer motor. Ahoy! T' booster recovers under its own chute by motor ejection. Well, blow me down! Begad! Payload: BoosterVision GearCam taped t' t' side. Crude, ya bilge rat, but effective.

Launch day: I racked t' rocket, me bucko, ya bilge rat, shiver me timbers, set up t' breakwire, arrr, me bucko, and twisted t' wires for power. Well, blow me down! Since I didn't have enough room t' push t' wires back into t' bay, arrr, I taped them t' t' outside. Well, blow me down! That was a mistake... T' launch was beautiful! Straight, shiver me timbers, and staged on cue. T' booster chute came out and it drifted down safely. T' sustainer had a good apogee event(drogueless), arrr, but I lost sight o' it while followin' t' booster. Avast! There was no main deployment, and fellow club members pointed me in t' direction they saw it fall. Begad! Blimey! While walkin' out for recovery, ya bilge rat, I tried t' figure out what went wrong. Avast! Too many sheer pins? Nay enough BP? When I got t' it, ya bilge rat, shiver me timbers, I immediately knew what happened. Ya scallywag! Ya scallywag! T' armin' wires were taped t' t' bottom o' t' sustainer. When t' apogee separation occured, it ripped t' wires out o' the altimeter, shiver me timbers, killin' power. Aye aye! Well, blow me down! AUGH! I powered up t' ARTS board later, and t' data showed 1700 ft accel, 1500 baro. Well, blow me down! Arrr! WAY short o' Rocksim's prediction, ya bilge rat, so t' loss o' power probably scrambled t' data. Aye aye! Ahoy! But other than t' ebay being crunched, me hearties, and t' booster bein' scorched by t' sustainer motor, arrr, it didn't come out too bad. Avast! Aye aye! I can replace t' ebay and fly it again.