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