Brief:
This is a 1:144 paper scale model o' t' French rocket, ya bilge rat, Diamant B, first launched in 1970. Blimey! Although Lansbergen's website is in Dutch, arrr, t' instruction for t' model are in English. Aye aye! Begad! Blimey! T' plans are for a static model, but with a few alterations, it can be made t' fly usin' Micromaxx motors. Avast! Arrr! Blimey! My version separates at t' shoulder, uses nose weight, and has a 6 mm motor mount installed.

Construction:
A list o' what is needed t' make t' Diamant B:

• card stock
• yellow glue
• 6mm motor mount and motor block with extra card stock for centerin' rings
• Keelhaul®©™ for shock cord
• 2 BBs for nose weight

All t' parts for t' rocket are on one page with t' "instructions" on t' other page. Well, blow me down! Arrr! Construction is fairly easy. Blimey! Blimey! Roll t' three different body tubes first, ya bilge rat, matey, shiver me timbers, then roll t' nose cone. Avast, me proud beauty! Begad! After these have dried, arrr, I rolled t' couplers that link t' various parts o' t' rocket together. Blimey! I must mention at this point that I was just buildin' without much thought o' convertin' t' rocket t' fly. Aye aye! Blimey! Yellow glue was used exclusively, me hearties, applyin' only tiny amounts with t' end o' a toothpick. Aye aye! After I had t' entire rocket glued from nose cone t' tail, I decided then t' put in a motor mount and skip t' directions for addin' t' nozzle/exhaust unit at t' bottom. Begad! T' important thin' t' remember when gluin' t' rocket together is t' keep all t' seams lined up so that they are on t' "back" o' t' rocket. When I added t' launch lug, me hearties, I added it right t' t' side o' t' seam as well.

Next, I added t' fins. Begad! My card stock was a little too weak, so me fins were a little flimsy at first. Well, blow me down! T' fins are rather small and I began t' wonder how they would perform once it came time t' fly them.

I cut a small piece o' 6mm tubin' and put in a motor block. Aye aye! I then used scrap pieces o' card stock in long thin strips and rolled them around t' motor mount until it slid in t' t' tail o' t' Diamant B, ya bilge rat, makin' contact with t' inner diameter o' t' rocket. Ya scallywag! I inserted t' motor mount with a motor and did a swin' test. After addin' 2 BBs into t' nose cone up through t' tail, t' swin' test worked fine. Ya scallywag! Next I glued t' BBs in t' nose cone, me hearties, matey, usin' tissue paper and yellow glue as a bulkhead t' keep them in place, and then glued in t' motor mount.

Basically, arrr, if you know t' alphabet and use common sense, ya bilge rat, arrr, matey, it should be a piece o' cake t' make t' rocket. Well, blow me down! T' parts are labeled with letter names, ya bilge rat, and t' guide on page 2 clearly show that part "B-C" clearly links part B with part C, ya bilge rat, and so on.

This is nay really a CON, but t' rocket is quite small, and rollin' that little nose cone is a slight challenge. Begad! If you have never done a paper rocket before, I would recommend startin' with somethin' a little larger. Begad! Aye aye! Normally, a project like this I would rate a skill level 2, me bucko, but because o' t' size o' t' rocket, me hearties, I would put it at a skill level 2.5 - 3.

PROs: parts fit very well and do nay need t' be altered or cut in any way t' get proper fit.

Finishing:
Since t' rocket is pre-printed, all t' markings and detail are already on t' paper. Ya scallywag! All I had t' do be add a little launch lug. Since me MMX launch lugs are styrene and t' rocket is paper, arrr, I used a dab or two o' CA glue t' keep t' launch lug on.

After t' rocket was completely dry, I sprayed it with Rustoleum Lacquer (high luster coating). Avast! It made t' paper translucent, shiver me timbers, allowin' me t' see a lot o' t' detail inside t' rocket. Ya scallywag! At this point, ya bilge rat, me bucko, I thought I had ruined t' rocket, so I just let it sit in t' sun and I forgot about it. Ahoy! Later on that day, shiver me timbers, I went outside and t' me surprise, t' rocket looked fine. Aye aye! T' translucence disappeared. So, me bucko, me bucko, I gave it another 2 or 3 coats. Avast! After a day o' allowin' t' lacquer t' cure, it was ready for launch. Aye aye! T' fins also became much more rigid from t' lacquer treatment.

Construction Rating: 5 out o' 5

Flight:
I first flew t' rocket on August 7, 2004 at t' high school where I work. Arrr! Begad! T' first launch be quite interesting. Ahoy! Begad! T' motor (MMX II) fizzled, ya bilge rat, and t' rocket jumped about a foot into t' air, enough t' clear t' launch rod. Ya scallywag! Blimey! At first, I thought that t' rocket was too heavy, ya bilge rat, or just did nay have t' aerodynamics t' make a good flight. Avast, me proud beauty! Begad! Upon inspection, I noticed that t' nozzle had blown clear out t' motor. Avast! A little CATO! Well, thar was no damage t' t' Diamant B, so I loaded up another MMX II. Avast, me proud beauty! This time, it ripped off t' pad, shiver me timbers, sailed into t' air, and at motor ejection (just a little puff), me hearties, it streamed t' t' ground, ya bilge rat, nose first. Ya scallywag! Good flight, but remember, shiver me timbers, I did nay put any recovery in t' rocket. Aye aye! I was hopin' that it would tumble. Well, it didn't. T' flight was successful, ya bilge rat, but t' recovery needed a little work. Begad! When I picked up t' rocket, I noticed no damage whatsoever. Arrr! It is very light and t' lacquer treatment added some strength t' t' paper.

I took t' model home and used an X-Acto knife t' cut around t' lower half o' t' shoulder. I added a card stock coupler t' t' lower half so that t' upper portion could sit on t' lower half. Aye aye! Arrr! Blimey! I then added a Keelhaul®©™ shock cord t' both parts. I decided that since t' rocket be so light, arrr, and yet rather large, me bucko, nose-blow recovery would work fine.

I launched t' Diamant B again on August 25, me bucko, ya bilge rat, 2004, me hearties, shiver me timbers, ya bilge rat, usin' MMX II motors again. T' first launch o' t' day t' Diamant took off at an angle. Ahoy! Although it flew well, it flew with more o' a trajectory than I had hoped. Begad! Ya scallywag! Ejection occurred early (MMX IIs have very short delays), and I know that if Quest built 2 or 3 second delays on their MMX IIs, we would have great little motors. Ya scallywag! Well, blow me down! Recovery be fine.

T' second flight o' t' Diamant B today be also on an MMX II. This time, me bucko, I got t' rocket t' ascend fairly straight, but towards t' end, it corkscrewed. Recovery was flawless.

So far, me hearties, ya bilge rat, I have flown t' rocket 3 times. Each flight be different, me bucko, with all flights bein' average t' above average. I am thinkin' about gettin' a longer launch rod for me MMX rockets, so that I can avoid some o' t' weathercockin' and corkscrewin' on lift-off.

Recovery:
Flight recovery worked fine once I installed t' nose-blow/Keelhaul®©™ idea into t' rocket. I am interested that t' rocket performed 3 different ways. Avast, me proud beauty! Each flight was at least nominal (I don't like corkscrewin' or weathercocking), and all flights were safe with ejection occurrin' way up in t' air.

Flight Rating: 4 out o' 5

Summary:
It's a fun little build and I like t' idea that it's a scale model rocket out o' paper that flies rather well despite t' small fins.

PROs: attractive French rocket with lots o' detail printed on t' card stock. We often see American, Canadian, me bucko, German and Russian scale rockets out on t' pad. Well, blow me down! We don't see that many French or Polish rockets for that matter. Well, blow me down! Aye aye! Perfect rocket for MMX and if one really wanted to, shiver me timbers, it is possible t' treat t' bottom body tube as a minimum diameter tube for 13 mm motors. I assume it would need more nose weight, arrr, me hearties, arrr, but it should really fly high (assumin' those little fins work).

CONs: none, matey, really. Avast! Ya scallywag! I wonder if t' rocket would perform slightly better with larger fins. Avast! This would be fairly easy t' do, just printin' up t' first page again slightly enlarged for t' fins, but usin' t' original size for t' rest o' t' rocket. Aye aye! Blimey! Considerin' this is supposed t' be a static rocket plan, shiver me timbers, it flies pretty well.

Overall Rating: 4 out o' 5