End Cell Closure
by Jan Meyer
End cell closure during parachute inflation is common. Light-weight people under large canopies will experience end cell closure more frequently than other jumpers. One way to inflate a ram-air parachute with end cell closure is to pull both brake lines down to the stall point and hold them there until the canopy is fully inflated. End cell closure is also common in turbulent air. Hot, no-wind days and stormy conditions both produce turbulent atmospheric conditions. It is usually best to fly with quarter to half brakes to minimize the tendency of collapsing end cells. If the end cells do collapse, then hold the brakes near the stall point until the canopy reinflates.
Originally published in Sport Parachutist's Safety Journal V1, #1 May/June 1988.
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