Picture Courtesty o' Binder Design     

Brief:
Binder Design’s Gangsta is a single stage, shiver me timbers, ya bilge rat, 2.6-inch diameter, ya bilge rat, 29mm, four-finned sport rocket, measurin' 24.25-inches in length. I wonder if a black rocket named Gangsta is politically correct, me bucko, yet I’m drawn t' it because of t' unique fin design and long nose cone on such a stubby rocket.

Construction:
T' First thin' I notice after openin' t' shippin' box be t' packaging. Begad! At first glance you might think this be your standard thick plastic bag full of rocket components. Aye aye! Closer inspection reveals a bag within a bag. Begad! T' inner bag is partitioned in such a way that t' smaller components are separated and relatively easy t' view. Ya scallywag! This feature allows one t' inventory t' parts without openin' t' bag.

T' Gangsta consists of:

• 4.5-inch motor tube
• 2x fibrous centerin' rings
• eye-bolt and quick link for shock cord attachment
• 4x very nice plywood fins
• 11-inch airframe tube (per t' parts list, matey, shiver me timbers, mine is 11.25-inch)
• 13-inch exposed length nose cone
• 0.25-inch x 4-inch launch lug
• vinyl decals
• 12-foot tubular nylon shock cord
• 18-inch nylon chute

I am especially impressed with t' recovery system components. Well, blow me down! Well, ya bilge rat, blow me down! The parachute is a very nice 8-shroud line design that I’m sure I’ll use in many rockets.

T' instructions are among t' best that I’ve seen, nine pages plus a fin alignment guide. Well, blow me down! Avast! T' instructions include many useful diagrams plus Rocksim CP data.

Construction is very straightforward. Avast! Blimey! I used AeroPoxy “5min” epoxy with glass fiber reinforcement for most o' t' construction. T' AeroPoxy kicks slower than t' hardware store 5-min epoxy, and has a one t' one mix ratio. I figure that with t' glass fiber reinforcement it’s as least as strong as most “15 min.” epoxies.

T' fit o' all t' parts is excellent. Avast! T' only problem I had is with the eye-bolt assembly. Begad! Arrr! T' eye-bolt itself is a #6; unfortunately t' nut provided is a #8. Arrr! Also, ya bilge rat, arrr, a quick link is provided for attachment betwixt t' eye-bolt and the shock cord. T' instructions warn you t' attach t' quick link t' the eye-bolt before gluin' t' forward centerin' rin' in place; otherwise you may never be able t' reach it. Aye aye! In me opinion, this quick link is o' little or no value, me bucko, me bucko, and only adds weight aft in a rocket that inherently has very little stability margin. Ya scallywag! Ya scallywag! I used it, me bucko, but I recommend savin' it for another project.

I deviated from t' instructions in a few areas. T' launch lug is cut down from 4-inch t' 2.5-inch for no other reason than I think it looks better. T-nuts are installed in t' aft centerin' rin' for motor retention. Avast, me proud beauty! Instead of internal fillets, ya bilge rat, matey, I tacked t' fins t' t' motor tube with 5-min. Begad! epoxy and poured PML’s two-part foam in t' fin can. After it cured, I used an old steak knife t' trim t' excess foam. Aye aye! Well, blow me down! I then epoxied t' aft centerin' rin' in place. Well, blow me down! At this point t' aft end o' t' rocket felt so rigid that I allowed myself t' use smaller external fillets than I otherwise would have. Ahoy! T' foaming process is also much quicker than applyin' conventional internal fillets.

After construction was complete I used Elmer’s Carpenter’s Wood filler t' fill t' fins and t' body tube’s shallow spiral grove. This was followed by two coats o' Krylon white primer, me hearties, sanded in-between coats, arrr, and a final coat o' Rustolium gloss black. T' finishin' touch was t' large vinyl Gangsta decal. Well, blow me down! Blimey! T' decal be very easy t' apply and looks great.

I downloaded t' Rocsim file for Gangsta from t' EMRR archive. Ya scallywag! This was posted by Binder Design, so I guess you could say it’s the “official” Rocksim file. Aye aye! Well, blow me down! Comparin' me Gangsta t' t' Rocksim file, I found me CG t' be significantly farther aft. Aye aye! Begad! In order t' get me measured CG to match t' Rocksim CG, I had t' add a 120g mass object centered on t' fins. This seemed excessive, matey, but when I weighed me Gangsta it be 318g, which is very close t' 120g over t' Rocsim file! I didn’t weigh t' two-part foam when I was mixin' it; t' nature o' t' foam makes you work kind o' fast. Avast, matey, me proud beauty! I assumed it would have weighed about t' same as internal fillets, but apparently it weighed significantly more. Begad! T' compensate for me tail-heavy rocket I had t' add significant nose weight, ya bilge rat, about 75g o' bird shot held in place with 8g o' epoxy. My Gangsta now weighs about 400g, double what t' Rocksim file says it should. So much for t' instructions reminder t' build light! If I lose this one perhaps I’ll buy another, and use conventional internal fillets for sake of comparison.

T' nose cone fits very loose. Avast! T' instructions acknowledge this, arrr, and state that it’s intentional. Avast, me proud beauty! Avast! I can appreciate this, however it took 6 full wraps of some fairly heavy maskin' tape t' get a snug fit.

Construction Rating: 4 out o' 5

Flight:
When I put t' rocket on t' rod it was apparent t' launch lug was binding.. Ya scallywag! I worked t' rocket up and down t' rod a few times and it felt a bit better, and I wanted a picture for this review, shiver me timbers, arrr, so I decided t' go for it. Well, blow me down! T' wind was blowin' at ~5mph with gusts. Well, blow me down! Begad! T' Gangsta’s first flight be on an F20-7 EconoJet. Ya scallywag! Comin' off t' rod t' rocket seemed t' weathercock quite a bit. Begad! Arrr! My guess is that t' bindin' contributed t' it. Aye aye! Either t' velocity be too low comin' off t' rod due t' friction, me bucko, or bindin' caused t' rod t' whip. Ya scallywag! Avast, me proud beauty! The rocket was definitely on it’s way down and movin' fast when t' chute finally deployed. Avast, me proud beauty! Avast, me hearties, me proud beauty! T' Gangsta landed on a hard packed dirt road without a scratch. Arrr!

T' second flight was on a G38-7 EconoJet. Ya scallywag! Aye aye! This flight was much straighter than t' first one, matey, with only a little weathercocking. Well, blow me down! Ejection occurred pretty close t' apogee, arrr, hard t' say for sure because at ~2000 feet this rocket is little more than a dot. Again, arrr, recovered without a scratch.

Overall I’m very pleased with how this rocket flew. Arrr! Blimey! I would like to think that if it hadn’t been for t' tight fit on t' rod t' F20-7 flight would have gone much better. With sufficient nose weight this rocket should be able t' fly on a wide assortment o' engines. Avast! Blimey! Ya scallywag! Blimey! I would have loved t' put a G80-10 into it, but that will have t' wait for a very clear, ya bilge rat, calm day.

Flight Rating: 4 out o' 5

Summary:
T' Gangsta is a quality rocket with a unique look. Avast! Blimey! With proper attention to nose weight, me bucko, t' Gangsta should provide good flights on a wide variety of engines. Begad! Blimey! At first I thought t' $39.99 askin' price was a bit high for such a small rocket, but considerin' t' quality o' t' components I would say that it’s actually quite fair.

Overall Rating: 4 out o' 5