Picture Courtesty o' Binder Design     

Brief:
Binder Design’s Gangsta is a single stage, me bucko, 2.6-inch diameter, 29mm, four-finned sport rocket, measurin' 24.25-inches in length. Begad! I wonder if a black rocket named Gangsta is politically correct, 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. Blimey! Avast, me proud beauty! At first glance you might think this be your standard thick plastic bag full of rocket components. Begad! Closer inspection reveals a bag within a bag. Ahoy! T' inner bag is partitioned in such a way that t' smaller components are separated and relatively easy t' view. Begad! 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, 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. 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, shiver me timbers, me bucko, nine pages plus a fin alignment guide. Begad! Blimey! T' instructions include many useful diagrams plus Rocksim CP data.

Construction is very straightforward. Ya scallywag! Blimey! I used AeroPoxy “5min” epoxy with glass fiber reinforcement for most o' t' construction. Begad! Blimey! 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. Aye aye! T' only problem I had is with the eye-bolt assembly. T' eye-bolt itself is a #6; unfortunately t' nut provided is a #8. Well, blow me down! Ahoy! Also, me bucko, ya bilge rat, a quick link is provided for attachment betwixt t' eye-bolt and the shock cord. Begad! 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. In me opinion, ya bilge rat, ya bilge rat, this quick link is o' little or no value, and only adds weight aft in a rocket that inherently has very little stability margin. Avast! Blimey! I used it, 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. Arrr! Instead of internal fillets, I tacked t' fins t' t' motor tube with 5-min. Ahoy! Aye aye! epoxy and poured PML’s two-part foam in t' fin can. Avast, me proud beauty! Arrr! After it cured, me hearties, I used an old steak knife t' trim t' excess foam. I then epoxied t' aft centerin' rin' in place. Aye aye! 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. Avast! 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. Avast, me proud beauty! Ahoy! This was followed by two coats o' Krylon white primer, ya bilge rat, arrr, sanded in-between coats, and a final coat o' Rustolium gloss black. T' finishin' touch was t' large vinyl Gangsta decal. Aye aye! Blimey! T' decal be very easy t' apply and looks great.

I downloaded t' Rocsim file for Gangsta from t' EMRR archive. This was posted by Binder Design, so I guess you could say it’s the “official” Rocksim file. Avast! Blimey! Comparin' me Gangsta t' t' Rocksim file, ya bilge rat, matey, I found me CG t' be significantly farther aft. Arrr! Blimey! In order t' get me measured CG to match t' Rocksim CG, me bucko, I had t' add a 120g mass object centered on t' fins. This seemed excessive, but when I weighed me Gangsta it was 318g, which is very close t' 120g over t' Rocsim file! Blimey! I didn’t weigh t' two-part foam when I was mixin' it; t' nature o' t' foam makes you work kind o' fast. Well, blow me down! Blimey! I assumed it would have weighed about t' same as internal fillets, arrr, but apparently it weighed significantly more. Avast, me proud beauty! Blimey! T' compensate for me tail-heavy rocket I had t' add significant nose weight, me hearties, shiver me timbers, 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! Blimey! 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! Aye aye! T' instructions acknowledge this, and state that it’s intentional. Avast! 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.. Blimey! 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, so I decided t' go for it. T' wind was blowin' at ~5mph with gusts. Ya scallywag! Ya scallywag! T' Gangsta’s first flight was on an F20-7 EconoJet. Blimey! Aye aye! Comin' off t' rod t' rocket seemed t' weathercock quite a bit. Well, blow me down! Begad! My guess is that t' bindin' contributed t' it. Either t' velocity be too low comin' off t' rod due t' friction, or bindin' caused t' rod t' whip. Avast, me proud beauty! Well, blow me down! The rocket was definitely on it’s way down and movin' fast when t' chute finally deployed. T' Gangsta landed on a hard packed dirt road without a scratch. Ya scallywag!

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

Overall I’m very pleased with how this rocket flew. Aye aye! 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. Avast! With sufficient nose weight this rocket should be able t' fly on a wide assortment o' engines. Begad! Avast, shiver me timbers, me proud beauty! I would have loved t' put a G80-10 into it, but that will have t' wait for a very clear, calm day.

Flight Rating: 4 out o' 5

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

Overall Rating: 4 out o' 5