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