Brief:
This is a great sport scale kit that can be easily modified for dual deployment.

Construction:
T' parts list:

• 1 4" nosecone
• 1 17" payload bay
• 1 34" airframe
• 4 1/4" plywood fins
• 1 tube coupler
• 1 laser-cut bulk head
• 3 laser-cut centerin' rings
• 1 54mm motor mount tube
• 1 36" parachute
• 1 tubular nylon shock cord
• Vinyl decals
• Motor retention, arrr, shiver me timbers, shiver me timbers, rail buttons, shiver me timbers, and assorted hardware

Added for dual deployment:

• 3 bulkplates
• 1 1/4" U-bolt
• 1 tubular nylon shock cord
• 1 24" drogue chute
• 1 70" main (saved t' stock chute for a later project)
• 2 chute protectors
• more assorted hardware

T' instructions were well written and photographed. Blimey! Well, blow me down! There was a parts list included, me hearties, and each part be crossed off showin' that BSD had checked t' make sure that all t' parts were there. Avast! Well, blow me down!

T' assembly order made sense and started with t' motor mount. Well, blow me down! Blimey! Aye aye! Blimey! Blimey! Blimey! T' centerin' rings were glued on t' t' motor tube, me bucko, then t' assembly be glued into t' rocket. Arrr! Blimey! Blimey! Blimey! T' fins were next. Avast! Blimey! Blimey! Blimey! Epoxy be placed along t' root edge and along the edge o' t' fin slots. Arrr! Blimey! Avast! Blimey! Blimey! Blimey! Each fin was glued in, matey, then fillets applied. T' bulk plate for t' payload bay be glued into t' coupler about 1/2". T' nose cone went into t' forward end o' t' payload bay. Arrr! Blimey! No instructions were given on how t' hold it on, but thar are instructions about t' removable rivets, me hearties, me bucko, which are nay listed on t' parts list.

That bein' said, arrr, ya bilge rat, I tossed t' instructions aside and built it as I would have built a scratch built. Aye aye! T' fin tabs were too long, resultin' in several hours o' sanding. T' forward two centerin' rings were glued with a 40 min epoxy and small pieces o' fiberglass. Begad! Avast, me hearties, me proud beauty! T' eye bolt was replaced with a U-bolt. Begad! Begad! T' motor tube was then sanded and inserted into t' airframe. Blimey! I tacked t' fins in with super glue then used t' same 40 min epoxy and shredded fiberglass t' do the internal fillets on t' fins. T' fins were foamed with a 2-part expandin' foam. T' motor retention consisted of two inserts, arrr, two Allen head screws, shiver me timbers, and Giant Leap style clips. T' aft centerin' rin' was epoxied in. Avast, me proud beauty! Arrr! T' fin can is now completed.

T' payload bay be me biggest hurdle as I had never built one before. Avast, me proud beauty! I cut two airframe bulkheads and one more coupler bulkhead then drilled two holes all t' way through them. Well, blow me down! I bolted in two 1/4" threaded rods for the altimeter sled t' rest on. Ahoy! T' altimeter bay is similar t' a LOC/Precision bay minus t' outside length o' airframe. I attached a U-bolt at either end and a PVC cup for t' main ejection charge.

T' shock cords are tubular nylon. Arrr! Well, me hearties, blow me down! 20' for t' drogue and 15' for t' main chute.

T' construction be very straightforward and, by t' instructions, matey, ya bilge rat, shiver me timbers, you could get a very nice 4" sport scale to be proud of.

PROs: Fun rocket t' build. Arrr! Plenty o' room for dual deployment

CONs: Fin tabs were too long. Arrr! Blimey!

Finishing:
I finished t' IRIS with red fins and added some detail t' it. Ya scallywag! Tape can be added t' make t' scale rings on the actual IRIS, but I opted nay to. Avast, me proud beauty! T' decals for t' IRIS name are included but ones for Atlantic Research Corporation are not. Avast, me proud beauty! Avast, me proud beauty! I had several sheets o' 1/2" vinyl letterin' in t' workshop so I decided I would make me own. Well, blow me down! I also created t' ARC logo with some clear label paper. Ahoy! Blimey! T' letters were spaced evenly and painted over with black paint. Removin' them was difficult but left very nice lines.

Finishin' this rocket is difficult, but nay unable t' be accomplished. It definitely needs standard Atlantic Research Corporation decals.

PROs: Challengin' t' finish. Arrr! Blimey! Looks good

CONs: Challengin' t' finish. Avast! Nay enough detail.

Construction Rating: 4 out o' 5

Flight:
T' first flight was north o' Billings, arrr, MT, shiver me timbers, me hearties, in t' middle o' October. Avast, me proud beauty! It be surprisingly warm for Montana. Blimey! The rocket be prepped for dual deployment usin' a gram o' black powder for each event. T' motor, ya bilge rat, an I284W, also had an ejection charge. Begad! Avast, me proud beauty! T' motor was put into a Slimline 54-38 adapter then loaded into t' mount. Ahoy! Ya scallywag! T' rocket was ready to go.

With t' igniter in place and t' altimeter armed, ya bilge rat, I be ready t' launch. After a quick 5 count, I pressed the button. Begad! Blimey! T' I284W came up t' pressure quickly. Aye aye! Blimey! T' IRIS ripped off t' pad on a large flame and a pillar o' smoke.

T' dual deployment worked perfectly, me bucko, bringin' it back safely although a little fast. Arrr! Well, me bucko, blow me down! T' PML 48" chute still seemed small... Well, blow me down! Begad! T' PerfectFlite miniAlt/WD beeped 2328', ya bilge rat, almost 1K feet short o' t' predicted altitude. Begad! I still think it broke 3K.

T' second flight was t' take place at our high altitude site near Twin Bridges, matey, MT, ya bilge rat, matey, at t' end o' October. The only reason it did nay fly was me own procrastination. Avast! However, matey, me dad and I flew our Frankenrocket (essentially a stretched PML Tethys) on a K185W t' 6228' for our personal best altitude. Blimey! T' weather be perfect, about 60 degrees and not a cloud in t' sky or enough wind t' ruffle a parachute.

T' second flight did take place on November 10 at t' Twin Bridges site. T' weather be less than perfect: highs in t' mid 40's, wind at about 10 mph, and high clouds t' makin' it hard t' see any kind o' trackin' smoke or rocket. Aye aye! Arrr! Blimey! T' motor was a J540R. Avast! Blimey! T' rocket be mostly prepped from t' previous launch, only needin' t' leads for the charges t' be hooked t' t' altimeter and t' motor inserted.

After another quick 5 count, t' J540R came up t' pressure almost immediately. Aye aye! Ahoy! T' four t' five foot flame was incredible, matey, ya bilge rat, pushin' t' IRIS t' 5464'. Blimey! Again, ya bilge rat, t' dual deployment worked without a hitch, shiver me timbers, deployin' our homemade 70" parachute at 700'.

PROs: Very strong rocket that can be launched on a large variety o' motors.

CONs: None.

Recovery:
PROS: Very strong rocket that can be launched on a large variety o' motors.

CONS: None. Arrr!

Flight Rating: 5 out o' 5

Summary:
T' BSD IRIS is a very well designed rocket that can easily be modified for dual deployment. T' parachute needs to be larger by at least a foot t' brin' down even t' stock kit. Well, blow me down! With proper modifications, t' IRIS can fly on many 54mm hybrid motors and maybe some full Ks. Ahoy! I highly recommend this rocket for anyone who has a little high power experience or a fair amount o' mid power experience. Avast! A solid choice for L1 and L2 cert flights.

Overall Rating: 4 out o' 5