TM 10-1670-287-23&P
0002 00
0002 00-5
2. Main Deployment System. The main deployment system consists of the items shown below. The
pilot chute has a 7-inch diameter crown, a 32-inch spiral spring, and is covered with a combination of
Type I nylon cloth (0 to 5 cfm) and nylon mesh fabric. A 1-inch loop at the bottom of the main pilot
chute is used to connect a 62-inch main pilot chute bridle line into the main canopy. The deployment
bag measures 17 by 10-inches and is constructed of nylon cloth. A grommet in the top of the bag
allows the bridle line to pass through the bag and attach to the canopy. The bag has attachment
points for type II heavy-duty retainer bands, which are used to lock the bag closed and stow the
suspension lines.
3. Main Canopy Assembly. The main canopy assembly consists of a rectangular canopy constructed of
Type I nylon with heat set, stabilized, braided polyester suspension and control lines, a slider for
reefing, and four barrel-nut style connector links for connection to the main risers.
a. Canopy. The MC-4 canopy is a semi rigid wing when inflated. It has an upper and lower surface
connected by a series of ribs. This construction forms a rectangular shaped canopy with seven
dual openings at the leading edge known as cells. Each cell is identified numerically, 1 through
7. The cells allow ram air pressure between upper and lower surfaces giving the canopy its
shape and glide characteristics.
MAIN PILOT CHUTE
MAIN PILOT CHUTE BRIDLE AND DEPLOYMENT BAG
Ring
NO. 5
Grommet
Suspension
Line Attaching
Points
Locking Stow
Attaching Points
Locking Flap
