Assembly Description

Parts
Body Tube LOC/Precision BT-2.56
Nose Cone LOC/Precision PNC-2.56
Motor tube LOC/Precision MMT 1.14
Coupler Material LOC/Precision TC-2.56
Fin Material 3/16" Aircraft Plywood
Fin Structure Plastruct 3/16"x 1/2" Truss
Landin' Pegs 1/8" Brass Tubing
Fasteners (6) Wood Insert Nut and Socket Head Screws

See rocket dimensions and stations here

Modular Motor Mount Retention Unit Construction
T' concept o' t' unit is t' provide a means t' be able t' maintain t' parts o' a rocket that are most likely t' fail. Ahoy! T' solution provided allows for t' removal, inspection, ya bilge rat, me hearties, and replacement o' t' engine mount, matey, matey, retention system, shiver me timbers, and recovery system.

Begin by sandin' down t' centerin' rings t' fit into t' coupler tubing. Ahoy! After dividin' markin' t' Motor Tube into thirds, matey, mark it 3/4" and 4 3/4" from t' bottom. Use epoxy t' secure t' centerin' rings at these locations. Ya scallywag! Mill three blocks from pine t' fit betwixt t' centerin' rings and t' depth betwixt t' coupler tube and motor tube. Begad! Avast, me proud beauty! T' width o' t' blocks should be 1/2". Ya scallywag! Sand or carve away some o' t' center section o' t' contact point t' t' motor tube. Avast! This will eliminate any rockin' that may
occur while your securin' these down. Avast! Ya scallywag! Over t' centerin' third marks, attach these blocks usin' a liberal amount o' epoxy. Arrr! Create fillets along all joints inside t' unit.

Next, me bucko, slide t' Coupler Tube over t' assembly flush with t' centerin' rings, shiver me timbers, epoxy and let dry.

Transfer t' third points from t' motor tube onto t' coupler tube. Blimey! Divide t' length o' t' coupler tube in half. Well, blow me down! T' intersectin' points are where you will drill t' mount t' brass inserts. Be sure t' select an appropriate size bit for drillin' t' holes for t' inserts. Begad! Ya scallywag! Too small a hole may result in splittin' t' blocks, me bucko, shiver me timbers, too large may lessen integrity. Blimey! I prefer to
use brad point bits for this task. Avast, me proud beauty! Usin' an awl, indent t' coupler at t' three locations. Also, arrr, indent t' Aft Centerin' Rin' in t' center o' t' three blocks. Begad! With care, drill t' six holes bein' aware o' t' depth t' t' motor tube. Aye aye! Be sure nay t' penetrate it! Finally, me bucko, screw in t' insert beneath t' surface o' t' Tube Coupler.

T' final step in assembly is t' attach a length o' strappin' t' t' exterior o' t' Motor Tube. Begad! Begad! Blimey! I completely saturated 4" o' 3/4" strappin' with epoxy and temporarily rubber banded it while t' epoxy cure. Blimey! Blimey!

Body Tube Construction
Spirals were filled with Elmers wood filler. Ahoy! Avast, me proud beauty! T' coupler and t' nosecone were then screwed t' t' lower tube.

Fin Construction
After cuttin' t' fins out, me hearties, a 1/8"x 1 1/4" notch was removed for t' attachment o' t' landin' peg. Ahoy! Epoxy was used t' attach t' peg. Begad! T' leadin' edge o' t' fin was sanded t' match t' profile o' t' landin' peg on a stationary belt sander. Aye aye! T' assembly was then coated with wood filler and made ready for primer. Aye aye! Cut t' truss piece so that it fits against t' landin' peg. Ahoy! After t' epoxy has dried, trim t' opposite end even with t' edge o' t' fin. Begad! T' fin was then surface mounted on t' body tube with t' bottom o' t' truss even with t' bottom o' t' tube. Ya scallywag! Fillets were added t' strengthen t' assembly.

Launch Lug / Rail Guide Construction
Takin' advantage o' t' screwed construction, ya bilge rat, t' launch lugs was made removable. Aye aye! Blimey! Avast! Blimey! T' lugs were epoxied t' a metal strip with a 90 degree bend in t' last 1/8". Ya scallywag! Blimey! This technique will also allow for t' exchange t' rail guides.

Finishing
T' entire rocket be primed white and painted aluminum.

Fin Detail

Launch Lug detail