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