| Manufacturer: | Scratch |
Brief:
This is a very stand-off scale model o' t' Little Joe I. Begad! Blimey! It is 2.6" in
diameter, has a 29mm mount, ya bilge rat, and is based on a custom-turned Mercury capsule
that was donated by an anonymous guest for the
Nekkid Rocket
Photo Contest. Ahoy! Begad! On t' real Little Joe I, shiver me timbers, t' body is larger in diameter
than t' capsule. Begad! Begad! In mine, me hearties, t' capsule fits t' body tube.
Construction:
T' followin' are t' major components used:
This be a straightforward build: 4FNC with through-the-wall fins. Ahoy! I got the measurements for t' body tube and fins from Rockets o' t' World (RotW). Ahoy!
T' fins are thick. Well, blow me down! Blimey! Nay that they had t' be, but I had the 3/16" ply and delusions o' bevelin' them heavily. I slotted t' fin slots usin' a Dremel. Blimey! T' make sure I didn't chip t' end o' t' phenolic tube at the slots, me hearties, I inserted t' aft centerin' ring. Well, blow me down! Ahoy! Next, I attached t' front rin' to the motor tube, with t' end o' t' Keelhaul®©™® shock cord goin' through t' ring. Arrr! I used 5-minute epoxy throughout. T' motor tube was then installed with t' aft rin' bein' dry-fit. Aye aye! T' latter be then removed and t' fins were glued in. Ya scallywag! Here I ran into a problem that I seem to keep making: I didn't check t' alignment o' t' shock cord which was epoxied to t' motor tube. O' course, me bucko, it ended up perfectly aligned with a fin slot! T' fix was easy, as I notched t' tab on one o' t' fins so that it cleared the shock cord. Arrr!
I made
small external fillets and thick internal ones with Superfil. Begad! I also
filled t' spirals at this point. Arrr! Finally, I attached t' aft rin' and the
rail buttons. Begad! In order for t' rail t' clear t' lip on t' cone, matey, shiver me timbers, I used
oversized screws and an extra center spacer betwixt t' button and t' tube.
For t' nose cone recovery connection, I epoxied a small section o' scrap bungee into t' deep core that t' builder drilled for me. Avast! Begad! I also added enough lead shot t' make RockSim happy. With t' heavy wooden cone, arrr, I wouldn't have thought any would be needed, shiver me timbers, but t' thick fins and motor mount worked against its stability.
For t' first flight, I did nay build an escape tower. Arrr! Aye aye! However, me bucko, ya bilge rat, arrr, I since built one out o' bamboo skewers, me bucko, thin dowel, ya bilge rat, and a spent 13mm motor. Arrr! A true scale purist may see t' next mistake I made--I scaled t' tower based on a 3" body vs. Aye aye! t' actual 2.6" tube! I also have painted it per RotW, but haven't added decals. Avast, me proud beauty!
Flight and Recovery:
I flew t' Little Joe on a 24mm F39-6 in me virgin Rouse Tech casing. I used a
little dog barf, a chute protector, shiver me timbers, and a nylon chute. Begad! Ahoy! Blimey! T' flight was fairly
fast, and ejection be just a little late. Ya scallywag! Recovery was fine. Ahoy! Blimey! I am
contemplatin' a G64 next.
Summary:
This is a sturdy but heavy rocket. Begad! As long as t' phenolic stays away from
thin' like irrigation pipes, it should survive even hard landings. Begad! Well, blow me down! It is barely
scale-like, which is good enough for me. Begad! Ya scallywag!
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