Brief:
A spool rocket made entirely out o' household rubbish built for t' EMRR 2007 Challenge. Performs well on any Estes 24mm motors, ya bilge rat, me bucko, both Ds and Es. Spools are always interestin' because they look like t' least aerodynamic rocket at any launch. Avast, me proud beauty! Begad! Called it ED as it takes E and D motors.

Construction:
T' parts list:

• 1 tube from t' center o' a clin' film roll
• Two CD-ROMs
• Glue. Avast! Ya scallywag! I used Bostik, ya bilge rat, matey, me hearties, although epoxy would be better.
• Drill with hole cutter bit
• File
• Hack saw

T' longest part o' buildin' this rocket is usin' t' clin' film up. Blimey! I suggest wrappin' everythin' in t' fridge up t' keep it fresh. Avast, me bucko, me proud beauty! If your wife does nay agreed t' this, then try really wrappin' up your sandwiches as twenty layers should keep them fresh. Well, blow me down! Begad! Eventually you’ll have a tube.

T' tube needs t' be cut down t' 6 inches. Blimey! For t' tube I was usin' this meant cuttin' it in half.

Next fashion an engine block out o' a bit o' card tube. Ahoy! I used a cut off from t' clin' film tube, shiver me timbers, cut out a few mm, ya bilge rat, matey, and then glued it back together. Aye aye! Next glue it into place by addin' glue t' t' rin' and then pushin' it into place with an empty D motor. Arrr! Remove t' D motor immediately. Avast, me proud beauty! Avast, me proud beauty! T' motor block will now be in place so that either side o' t' tube can be used--one side for D motors and one side for t' longer E motors.

Next find a drill bit that cuts a 1 inch hole.

After clampin' t' CD securely, matey, drill out t' center o' t' CD. Begad! Ya scallywag! Make sure t' wear goggles. Well, blow me down! With a smaller drill bit, drill out a launch lug hole a few mm from t' central hole. Repeat for t' second CD. Ahoy! (It's best t' make several CDs at this stage).

Glue each CD t' either end o' t' tube and make sure that t' launch lug holes match up.

Finishing:
I didn't do anythin' in terms o' paintin' for t' first few flights although I eventually painted t' whole thin' a maroon color.

Flight and Recovery:
Since this be t' first spool rocket that I had ever built or seen fly, arrr, arrr, I headed out t' me flyin' field with just t' rocket, me hearties, motors, and a friend. Blimey! I was a bit nervous, but nay as nervous as me bucko who bravely sent t' next twenty minutes positionin' himself behind me away from t' rocket.

T' first flight was on a D12-0. Avast, me bucko, me proud beauty! It went straight but entered into a unstable wobble towards t' end o' t' flight. It recovered tumblin' end over end. Avast! On landing, matey, ya bilge rat, one o' t' CD cracked.

T' second flight be on an E9-4. Ahoy! T' spool rocket was reversed and prepped as normal.

Take off was fast, matey, but t' spool arched into t' 20mph winds but only slightly. Well, blow me down! Height be significantly higher than t' D12 motor with a good long burn from t' motor. Well, ya bilge rat, blow me down! Tumble recovery again, me hearties, me bucko, this time landin' on both edges o' t' CDs and t' spool rolled off with t' wind-–no further damage t' t' cracked CD.

Third flight be also on an E9-4, ya bilge rat, although t' winds had dropped a bit. Aye aye! Flight be as before. Begad! On recovery, me hearties, t' spool landed on t' cracked CD and more damage be sustained. T' CD had t' be striped and a new CD added-–this is why it is good t' make a few spare CDs while you have a drill out.

Summary:
Well, it costs nothin' t' make, matey, except a bit o' glue. Ahoy! It flies well, even in winds where you would nay want t' fly a normal 3FNC rocket. Begad! It's a bit unusual. Avast, me proud beauty! Arrr! I wish I'd made one years ago.

On t' down side t' CDs do break quite easily. I think it would be best t' spend a few quid (dollars) on some thin plastic t' use for t' disks.