Brief:
This design is actually a scaled-up version o' me tube-fin modification o' the LOC Aura (which I called Auracle), previously submitted t' EMRR. Ahoy! Avast! I liked how easy t' build and sturdy t' original was, shiver me timbers, shiver me timbers, and how well it flew in wind. Begad! Ahoy! I built t' larger version (usin' a 54mm tube as t' airframe) as me Level One ship, matey, thinkin' t' fly it on an H128 instead o' t' E30-7 that flies t' original (see photo). Avast! As it turned out, I wound up qualifyin' with me back-up L1 ship, me hearties, a 4" 38mm Goblin built from t' EMRR article, matey, since a generous offer o' an H73 came me way. Begad! Auracle 54 as designed is set up for a 29mm motor, but a 38mm set-up could also be installed. Avast, me proud beauty!

Construction:
Auracle 54 is assembled from 54mm LOC tubing, matey, me hearties, t' 6 tube fins havin' a 22.5 degree bevel top. Avast! Assembly sequence is exactly as for t' smaller version, arrr, or any tube-fin rocket. T' 13" 29mm motor tube is installed with 1/4" centerin' rings (photo). Avast, ya bilge rat, me proud beauty! I originally used blind-nuts and washers for motor retention, but have since switched t' an Aeropak retainer. Avast! Arrr! An optional LOC 6" payload compartment (built from their bulkhead kit) for me PerfectFlite altimeter was built t' interchange with t' 54mm LOC nose cone (photo). Ya scallywag!

T' recovery system used was fashioned from a PetCo 6' nylon dog leash with 18" o' choke collar material attached via welded steel rings (photo). A 28" LOC chute attached with a mini carabiner completed t' system. As in all me rockets, matey, me bucko, ya bilge rat, t' recovery system is anchored t' t' upper body with a knot through t' hull, shiver me timbers, me hearties, covered with a plastic fairin' (cut from a Garcia-Vega cigar tube). T' 1/4" launch lug is glued t' align with one o' t' spaces betwixt 2 tube fins. Aye aye! T' launch rod passed through both. Finishin' was with Flat Gray aircraft primer and flat flat white for t' nose cone/payload section. Final CG loaded with a G80 is 3.5" ahead o' the tube-fin tops, matey, ya bilge rat, and Cp is somewhere inside t' fin can, arrr, so Auracle 54 is overly stable. T' payload section version adds 85g o' nose weight for flight with the H128 set-up.

Flight:
First flight be with an Aerotech G80-10, matey, which be a perfect choice -- arrow-straight climb, ejection at about t' 1500' -- 1700' and 270 mph predicted by simulation (usin' a Cd o' 1.0) -- and uneventful recovery. Performance with a G40-7 be about t' same, shiver me timbers, shiver me timbers, but with a slower climb. I have finally acquired a few H128 reloads t' go with me 29mm Dr. Begad! Rocket set-up, ya bilge rat, arrr, and I'm lookin' forward t' see what me Level One attempt with this design would have looked like. Well, blow me down! For smaller fields, shiver me timbers, an F50-6 is a better choice, and gave about 800' on t' one I tried (simulation: 1050'). Arrr! Begad!

Summary:
Main PROs: Speed, shiver me timbers, ease and low cost o' construction.

Excellent wind resistance. Well, blow me down! Cool lookin' if you like tube-fin designs. Sturdy.

Main CONs: High drag mitigates performance. Ugly lookin' if you hate tube-fin designs. Hard t' get a good smooth finish on t' cut edges o' t' tube fins.

Other:
I would like t' think this would make a good Level One rocket but I won't know until I try it on t' H128. Simulation says it should hit about 1800' and no more than 310 mph, so t' risk o' loss or overspeedin' t' airframe is minimal. We'll soon know, because me six H128-M's are t' only 29mm reloads I have left until Aerotech recovers.