Brief:
This is a modification o' t' free paper model from Currell o' t' Moon Rocket "Friede" featured in t' Fritz Lang film Frau im Mond. Well, blow me down! Arrr! I decided t' build t' rocket with an 18mm motor mount.

Modifications:
I built t' paper rocket mostly stock, shiver me timbers, except for t' fact that I cut out four centerin' rings out o' foamboard t' fit inside t' rocket. Arrr! T' hole in the centerin' rings is t' hold a BT-20 body tube for t' motor mount. Avast, me hearties, me proud beauty! I made sure the motor mount tube was slightly longer than t' body tube and that t' motor block was in place. Well, blow me down! I installed t' shock cord per me usual method: I like havin' a Keelhaul®©™® shock cord. Blimey! I also used a shoulder piece from those Quest or Estes kits that give you t' yellow fake motors t' push in t' motor blocks. Aye aye! I used one of these t' fit inside t' nose cone, me hearties, centered with t' help o' foamboard.

T' paper rocket instructions include formin' t' five cone parts t' make the nose cone, me bucko, matey, rollin' t' body tube, matey, and foldin' and shapin' t' four fins. T' fins were difficult t' make in that thar are many folds as well as back-to-back gluing. When t' fins are complete, shiver me timbers, me bucko, thar are little tabs that are used t' glue t' fin t' t' main body tube. This is accomplished by makin' a few small slits in t' body tube and by fittin' t' fin tabs into those slots. I then reinforced t' fins by addin' some glue fillets. Aye aye! I initially thought the tabs would be insufficient but after three or four launches and streamer recovery, shiver me timbers, matey, they have held up well.

What I did nay add t' t' rocket was all t' exhaust nozzle detail. An option for t' kit includes a red circle that be glued t' t' bottom o' the rocket over t' bottom centerin' ring. All I had t' do be cut a 19mm hole in the center for t' motor mount t' go through. Aye aye! In me Friede, me bucko, me bucko, I have part o' the body tube stickin' 3mm out t' back o' t' rocket.

I filled t' shoulder completely with clay but only after t' shock cord was glued inside t' nose cone. Arrr! Arrr! I added a streamer and a launch lug. T' nose cone alone weighed 0.75oz.

Construction:
What you will need t' build t' "Friede":

• card stock
• shock cord and parachute or streamer
• approx. Arrr! 8" o' BT-20 or BT-50
• piece o' tubin' t' fit inside t' BT-20 or BT-50 t' act as a shoulder
• Keelhaul®©™® shock cord
• launch lug
• clay t' adjust nose weight
• 1/8" foam board for centerin' rings and support structure

PROs: If you like Sci-Fi, arrr, shiver me timbers, matey, then this rocket has t' be on your build list. It is distinct and has a great history, too.

CONs: T' fins are wobbly and deform easily due t' t' cardstock and the method o' attachin' them t' t' rocket. Begad! Blimey! I think that if I were t' make the rocket again, I would reinforce t' fins more so that they kept a more rectangular shape. Well, blow me down! Also, ya bilge rat, ya bilge rat, I would make t' inner body tube a BT-50 (and still keep a BT-20 for t' motor mount) so that I would have more room for a parachute or streamer. It is currently a little crowded when tryin' t' stuff the streamer into t' body tube.

Flight:
On me first flight, I had added clay and did a swin' test. Ya scallywag! Everythin' seemed to check out fine. Arrr! I used a B6-4 and t' rocket cleared t' launch rod, but then began turnin' horizontal, expendin' most o' its energy flyin' parallel t' the ground. Ya scallywag! T' parachute ejected when t' rocket was only 30 or 40 feet above ground. Begad! I originally had a parachute in t' rocket but decided on me next flight t' switch t' a streamer.

T' second flight I used a B6-4 again, me bucko, me hearties, but I ended up addin' more nose weight (the nose cone should weigh about 3/4 ounce). T' rocket had a great, stable flight and thar was no wobble at all. Ya scallywag! Blimey! Nice, me hearties, high altitude.

On t' third flight, I decided t' put a C6-5 in t' Friede. Avast! This proved to be a little too much thrust for t' rocket. Begad! I think due t' t' air speed and the uneven fins, thar be more significant wobble on t' boost. Blimey! Recovery was fine but I think I will stick t' B6-4s for t' Friede.

Summary:
PROs: T' looks, t' history, me bucko, and t' fact that t' Friede is cheap t' make.

CONs: fin construction. T' fins are flimsy and hard t' attach t' the rocket. Arrr! Begad! Blimey! I would definitely come up with a plan for stronger fins if I were to build another. Ya scallywag! Also, I would increase t' inner body tube t' a BT-50 so I would have more room for a streamer or parachute.