Removal of the T-T bagging material yielded a nice tight/smooth finished product.
It will take a few hours to sand the overlaps smooth & feather edges.
2 layers carbon on the flat center of fin, & 1 6oz covering every thing T-T.
We actually pulled 29 on vacuum.
Next we spent couple hours working on the Av-bay.
Cut 4in. off coupler to make a doughnut bay.
Slid into position in payload, taped in place.
8 staggered postions marked for 1/4in. bolts.[tiny dots]
Room is at a premium considering the airframe tubes are 44in. & space is needed to fly 70 in. long motors. Av-bay is in forward end of payload. Only a few inches between av-bay and NC bulk plates. Will likely recess NC bulk plate several inches in shoulder.
Coupler will be fastened to fincan allowing motor to pass through, into payload tube, & payload will separate at apogee, with NC attached.
Main will be in 7.5in stuffer tube, foamed in Nose cone.
Holes for bolts drilled through both airframe/coupler....key mark added.
Coupler removed and serrated flange nuts held in place with bolts, JB welded on.
We are using Aluminum charge wells from
"Rocket Junkies" for ejection. 8 gram size on main side, [which they carry] & a custom set of 16gram size for apogee.
Dave contacted me [Mendal on Forum]after seeing this thread, and graciously offered to supply us with them, & custom make the larger size we need.
Truly a well made product and anodized to make clean up easy!
The machine screw is counter sunk inside the well, & just made it through the 1in thick BP with enough treads left to get nutz on.
I highly recommend these, & suggest you give them a look for your next project. They are in process of designing some smaller thin long "gun barrel" type that are needed for high altitude deployment...........
https://rocketjunkies.com/
Av-bay is 4in wide with 1/2 in. birch ply BP's adding another 1in. = 5in bay.
All hardware is 5/16ths.
4 carriage bolts [6in.] holding things together.
2 sets of U-bolts to attach recovery gear.
2 Rocket Junkie charge holders [only 1 mounted for pic]
BP will fill well with match placed ON TOP of charge.
Dog barf on top of that with 3 layers of aluminum duct tape holding things in place and to keep concussion of one charge, from setting off the other.
Kinda looks like a tambourine.....:smile: