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Round and Roundby Jan MeyerMany jumpers find building round or star formations to be difficult. Typically, the formation can experience problems of "potato chipping" or grip breaks. There are several ways to build rounds. Jumpers can "break-into" their slot or dock on their slot that is formed by others flying no-contact. Jumpers can form lines and then dock these pieces together to form a round. Jumpers can fly no-contact at a predetermined distance from a small base round, and then pick up grips when all jumpers are in position. The famous "build it as a U and have the last jumper close it" is another standard method. Learning the standard methods are a good way of building new formations, no different to reading other people's work before writing your own Iphone 4 review or watching a skateboarding video before buying your own deck. The star is such a unique formation that it is possible to build the formation so that no one is in their correct slot until the last jumper docks. No other formation can be built like that. Each method can be made to work. Sometimes it's easy, sometimes it's not. Some of the problems that may exist no matter which technique is used to build the round are potato chipping and grip breaks. Potato chipping is a result of jumpers flying in different level planes. That is, one jumper may be slightly higher than another jumper. The high jumper suddenly changes his body position to a faster fall rate. This immediately drops him below the optimal level plane. He adjusts body position too quickly and suddenly to determine the correct fall rate body position for the dive. He tends to overshoot the level plane, both on the high side and on the low side. If another jumper does similar rapid body adjustments, the star can resemble THE WAVE at football games. Violent and severe potato chipping induces large pulling forces between adjacent jumpers. Grips may be lost. This levelidity problem can arise from an dock from above or below the proper level plane. This dock demonstrates very poor technique and discipline of the jumper making it. Avoid this problem by docking from the proper level plane. A jumper should adjust his fall rate so that it matches the existing formation. If the formation has a changing fall rate, WAIT. Wait until the formation maintains a constant fall rate. A jumper should be prepared to adjust his fall rate to match it. Both a wide field of view to notice the whole star and a narrow field of view to notice a slot is used by each jumper. A jumper should see his slot or grips even with the horizon. When the horizon is above grips or a slot then a jumper is too high. When the horizon is below grips or a slot then a jumper is too low. Another common mistake after docking is when a jumper draws his arms into the "chicken wing" position. For some reason, some jumpers dock, take death grips and then pull their arms in so that their white, knuckled clenched fists are right at their shoulders. Most jumpers don't even realize they do this until you point it out to them. This may be a manifestation of fear or anxiety.
To Build a RoundA long time favorite is to start with a 2-way, let someone dock and make it a 3-way, let the next jumper dock to make it a 4-way, etc, as shown in Fig. 2.
One, more progressive, method is to have several jumpers perform a set up. They leave space between them for another jumper to dock. All of the set up jumpers have passive grips. All of the jumpers docking in the open slots take active grips on the set up jumpers. This technique is shown in Fig. 3.
A hybrid method consists of a 2 jumper set up. Each jumper docks
and takes one grip and then presents a grip to the next jumper
to dock, as shown in Fig. 5.
Another advanced, but not quite perfected, technique is to fly
at a predetermined distance from a base formation. A small star
is built to be a setup for the large star set up jumpers. The
same number of large star, set up, jumpers line up directly behind
each of the base jumpers at a specific distance, as shown in Fig.
6.
Every method can be used to build a star. Failures and funnels can occur with every method too. There is no best way to build a round. For a given situation, one method may work better than another. Previous formations and how large of a star is attempted will influence the selection of the method. Once a star is completed it is very pretty, especially the large stars.
Originally published in Sport Parachutist's Safety Journal V2, #4 Jul. 1990.
Dedicated to enhancing sport parachuting safety by disseminating information
about equipment, environments and human factors.
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