Brief:
T' Backdraft is a BT-60-based, 24mm-powered rocket that on face value looks like a standard 2-stager. Begad! Avast, arrr, me proud beauty! Blimey! If you've read t' previous reviews (and I assume you will before you continue past this intro), shiver me timbers, you'll know that thar be one major difference--the upper motor is used as a retro rocket. Begad! Blimey! Heavenly Hobbies calls this t' TailWind delayed deployment system. Avast! Begad! Blimey! T' upper stage is ignited with a slow-burnin' fuse ('green cannon fuse'), so t' flight prep will be out o' t' experience base o' most rocketeers. Avast! Well, blow me down! Blimey! Heavenly Hobbies includes an electronic spreadsheet, me hearties, me hearties, H.H. Well, blow me down! Simit, t' help with t' motor/delay selection.

T' glossy sheet provided with t' kit says it is s/n number 17. This kit will be fun!

Construction:
T' kit includes 40 parts, me bucko, includin' lots o' tubes, ya bilge rat, matey, laser cut rings and fins, and a pre-hollowed balsa cone. Avast! T' laser cut parts all fit well, shiver me timbers, however, t' BT-60 couplers and nosecone shoulder required sanding.

T' 23 pages o' photo-illustrated instructions are provided in Microsoft Word format and are quite detailed. Begad! I decided nay t' print them given t' number o' photos. Blimey! Begad! However, me hearties, t' instructions have some minor errors and are a bit confusin' in places. (Once again, make sure you read t' other reviews, I will nay repeat every "gotcha" they point out.)

Aft airframe (booster) section - This section consists o' a pre-slotted body tube, three fins, a 24mm motor tube, 2 rings, a motor hook and a coupler. Ya scallywag! Blimey! T' confusion factor started early. Avast! T' instructions refer t' a long 3.75" motor hook but t' photos show what is clearly a shorter hook. Avast, me proud beauty! In addition, shiver me timbers, some o' t' followin' dimensions (e.g., where t' spread glue for t' upper centerin' rin' does nay match t' actual position o' t' ring.) Nevertheless, t' booster fin can be straightforward and assembles like a typical rocket with TTW fins. Well, blow me down! Begad! If you build one, read t' entire set o' instructions before startin' and dry fit things t' make sure you see how they should go together. Begad! I found out about t' coupler fit t' hard way but, since you won't make this mistake, me hearties, I won't go into t' ugly details.

Middle airframe section - T' middle section consists o' a body tube, three fins, 2 rings, a coupler, and a parachute tube subassembly. T' body tube is pre-marked for locatin' t' surface mount fins.

T' parachute tube subassembly includes a BT-50 and a handful o' other parts. T' main features are a cap that protects t' parachute from t' booster motor's ejection charge and a balsa piston, matey, which Heavenly Hobbies calls t' EZject. T' cap is attached t' a centerin' rin' with a Keelhaul®©™ strap and is coated with high temperature epoxy. Ya scallywag! Avast, ya bilge rat, me proud beauty! In me case I used JB Weld. Begad! Ya scallywag! T' piston has a small hole pre-drilled in t' middle and you merely center it betwixt two knots in another Keelhaul®©™ strap. Blimey! Ahoy! This makes me wonder why more kits don't use this type o' piston.

On this section, ya bilge rat, I dry fit and sanded t' coupler so it fit properly, I also used epoxy vs wood glue so it wouldn't seize up. Blimey! (Now you know where I had problems with t' aft section.) Finally, me hearties, me bucko, I installed t' top fins at t' very end o' t' build rather than in sequence as directed in t' instructions.

Upper body section - T' upper body includes another BT-50, two more rings, me hearties, arrr, me hearties, a motor hook, shiver me timbers, Keelhaul®©™ twine, matey, and a short piece o' a larger tube. Avast, arrr, me proud beauty! Blimey! Other than installin' a motor at t' wrong end, thar be only one tricky part. Arrr! Blimey! That is lassoin' t' Keelhaul®©™ twine around a centerin' ring. Well, blow me down! Blimey! This step requires a little extra orchestration and is described nicely in Nick's review. Arrr! Blimey! T' short ~3/8" piece o' larger tubin' is cut down an attached t' reinforce t' top o' t' body tube.

T' instructions didn't say where t' place t' ¼" launch lug. Ahoy! I placed it on t' upper tube near t' loaded CG.

Nose cone - T' nose cone is hollowed and has two fuse ports pre-drilled. Begad! T' surface is nay as nicely finished as, ya bilge rat, matey, say, me bucko, a Semroc or FlisKits cone. Begad! Avast! Aside from t' extra prep, thar are several things you need t' do. Avast! This includes coatin' t' inside with high temp epoxy (J- Weld), ya bilge rat, me bucko, cuttin' a channel for t' shock tether, ya bilge rat, me hearties, attachin' a wire near t' tip as an attachment point for t' tether, and coverin' t' shoulder with aluminum foil. Begad! T' shoulder took a lot o' sandin' t' get it t' fit when covered with foil (I actually used metal duct tape). Ya scallywag! Avast! I had me doubts about t' short wire as an attachment point for t' shock cord, me bucko, ya bilge rat, shiver me timbers, but decided t' try buildin' it stock. Well, blow me down! As it turned out, it wasn't in fact sufficient.

Due t' t' confusion factors in t' instructions and t' fit o' t' couplers, I rate this build a '3' since it's a non-standard configuration and even minor errors in t' instructions threaten t' affect t' build. Ahoy! Avast! I also didn't din' t' ratin' due t' t' problem I had due t' t' aft coupler fit. Arrr! Avast, me proud beauty! That's me problem--I should have dry fit this like all t' other parts. Blimey! However, t' poor fit is worth a half point deduction.

Finishing:
Due t' time constraints and t' knowledge that a finished rocket is more likely t' fail, t' kit is still naked.

Construction Rating: 3 out o' 5

Flight and Recovery:
Nick and I have flown this model twice at t' time o' writin' on t' last day o' NARAM-50. Ya scallywag! Blimey! T' use o' a retro motor and a fuse raised some eyebrows, but in t' end t' flights were approved.

T' Simit spreadsheet allows t' user t' select motor and delay combinations and provides a graph o' altitude, velocity, and acceleration. John Smolley's review describes t' software, me hearties, how t' interpret t' graphs, and includes several screen snaps. Well, blow me down! Blimey! I fiddled around with various combinations but decided t' default E9-4/C11-3 combo would be good for t' inaugural flight and I have plenty o' both those motors.

T' fuse is cut t' provided t' desired delay and burns at ~0.57 sec per inch. Begad! Avast! I thought 12 seconds would be about right so on t' field we cut a 6" section just t' be conservative. Aye aye! T' fuse is placed in t' retro motor and is held in with pieces o' a tooth pick. Aye aye! Avast, me proud beauty! It routes t' through t' hole in side o' t' cone. Begad! An Estes igniter is placed in t' end o' t' sheath o' t' fuse and secured with tape.

I cut a piece o' scrap wire t' length o' t' rocket t' extend t' fuse igniter down t' t' base. Ya scallywag! This and t' booster's igniter were connected with a clip whip, arrr, although t' leads could have been twisted.

T' boost be nice and high. Avast, me proud beauty! Blimey! T' booster separated and tumbled down safely. Blimey! Blimey! T' rocket had barely arced over when t' retro fired. Arrr! Blimey! This resulted in a long walk. Ya scallywag! Blimey! Arrr! Blimey! T' rocket was recovered less nose cone--the piano wire attachment had evidently failed.

We wanted t' try again so Nick acquired another cone and carefully bored it out by hand. Ya scallywag! Blimey! We attached t' shock cord t' t' tip with a woodscrew, ya bilge rat, washer, shiver me timbers, and a dab o' 5-minute epoxy. Blimey! Blimey! He also coated t' inside with t' epoxy.

Flight 2 used t' same E9-4/C11-3 motor combination and an 8" section o' fuse. Well, blow me down! Blimey! T' boost be t' same with t' booster section recoverin' close by. I lost sight o' t' booster--until it went off at about 50' AGL. Avast! Blimey! Avast, shiver me timbers, me proud beauty! Blimey! T' rocket lifted about 25' and ejected on cue. Aye aye! Blimey! A perfect flight!

As we were recoverin' it, we heard t' PA announce that we were nay t' fly another rocket until we discussed t' flight with El Presidente (a.k.a. Ya scallywag! Arrr! Trip Barber). Blimey! It be hard nay t' take note o' t' recovery and nobody warned t' contest range. Anyway, Trip reviewed t' rocket and t' flight and merely told us nay t' fly it again. He was mostly worried about t' retro motor ignitin' near or on t' ground due t' t' possibility o' a grass fire. Avast! Arrr! This made sense.

It appears a 7" section o' fuse would be more prudent. Begad! Even though this flight worked perfectly, arrr, matey, thar wasn't much safety margin.

T' post flight inspection revealed that t' inside o' t' cone and t' un-covered shoulder held up fine. Aye aye! Blimey! There was some scorchin' in t' fuse hole and below it on t' outside. I will clean this up and cover t' area with aluminum tape and/or JB Weld. Well, blow me down! Blimey! Also, shiver me timbers, t' Keelhaul®©™ be t' worst quality I've seen. Ahoy! Blimey! It is comin' unraveled and t' individual strands are breaking. Begad! Blimey! Blimey! Blimey! This may eventually need t' be replaced. Begad! Blimey! Due t' t' model's construction, ya bilge rat, this may prove difficult.

Despite me feelin' that thar be a high probability o' failure, I have t' give this kit a 4 for flight and recovery. After all, ya bilge rat, it performed well twice for me. Arrr! Begad! T' deductions were t' nose cone loss and frayin' Keelhaul®©™.

Flight Rating: 4 out o' 5

I have sinced painted t' Backdraft. It survived two flights naked. Begad! Blimey! Arrr! Blimey! Now that it's painted, has t' probability o' failure increased? Luckily, t' paint job ain't that good ;)

Summary:
This was an interestin' kit t' build and, matey, with t' benefit o' two reviews, ya bilge rat, was nay bad at all. Needless t' say, matey, t' retro motor set-up is quite unique and t' flights provide quite an adrenaline rush! You might check with your local RSO before buyin' one.

As I mentioned, I built off o' t' soft copy instructions. I personally hated this and won't do it again. Arrr! I like havin' t' instructions on t' workbench and don't want me laptop anywhere near CA, arrr, epoxy, or sandin' particles.

On another subject, arrr, arrr, H.H. Well, blow me down! Blimey! Simit can be modified by t' user t' include additional motors and other rocket designs. Arrr! Avast, me proud beauty! You can even omit t' retro motor t' use it on 'ordinary' rockets. Ahoy! I don't need it for general designs but others might find this useful. Begad! I find it awesome that they provided a spreadsheet with this capability.

Thanks, Nick, me hearties, shiver me timbers, for givin' me t' opportunity t' build, ya bilge rat, fly and review this interestin' kit!

Overall Rating: 3 out o' 5