The Nava System was a

ski binding A ski binding is a device that connects a ski boot to the ski. Before the 1933 invention of ski lifts, skiers went uphill and down and cross-country on the same gear. As ski lifts became more prevalent, skis—and their bindings—became increasin ...

and custom

ski boot Ski boots are footwear used in skiing to provide a way to attach the skier to skis using ski bindings. The ski/boot/binding combination is used to effectively transmit control inputs from the skier's legs to the snow. History Ski boots were leath ...

offered for sale in the 1980s. The system used a combination of flexible sole plate to keep the boot centered, and a spring-loaded plastic arm on the rear binding that was used to transmit sideways motions of the leg to the ski. This eliminated the need for a hard shell on the boot; the Nava boot was soft and resembled a knee-high winter boot. In spite of numerous endorsements by racing stars, the system never caught on and sales ended by the late 1980s.

History

The system was invented in the early 1970s by an Italian architect and skier, Antonio Faullin. He patented the design and sold the production rights in the mid-1970s. No production commenced, and the design was subsequently sold off to a number of manufacturers.Swett The design eventually found its way to Pier Luigi Nava, an avid skier whose company produced

motorcycle helmet A motorcycle helmet is a type of helmet used by motorcycle riders. Motorcycle helmets contribute to motorcycle safety by protecting the rider's head in the event of an impact. They reduce the risk of head injury by 69% and the risk of death by 42%. ...

s. Using

injection moulding Injection moulding (U.S. spelling: injection molding) is a manufacturing process for producing parts by injecting molten material into a mould, or mold. Injection moulding can be performed with a host of materials mainly including metals (for ...

construction techniques used for the helmets, Nava was able to develop a polyurethane boot plate that replaced the former metal models.Masia, pg.38 Metal plate bindings were popular in the 1970s, but the hard plate was difficult to walk on and subject to wear; Nava's soft plate and boot eliminated both problems. Nava first showed the system in April 1983 in Italy, and started sales in the winter of 83/84, and Canada in 1985. Frank Vener, an American who marketed a number of European brands in the US, started Nava Leisure USA and started sales in February 1986. There were two models, the ''Sansicario'' sold for $495 while the ''Cortina'' sold for $595,Gilmore, p.111. both well at the high end of the market. Early reviews were generally positive.Cole, pg. 38 Reviewers noted how easy it was to ski all day long without the discomfort of normal boots, and then clip out and walk normally in the boots off the slopes. It was also noted that system did not function well if one skied backwards, and also failed to transmit fore-and-aft forces that are sometimes used, especially in bumps. The company hoped that the high price would not be a barrier to skiers who were tired of putting up with sore legs and feet. This did not turn out to be the case. After two years of sales efforts in the US, the Nava system disappeared.

Description

A ski binding has to provide two types of support. One is a locking function that keeps the ski under the boot, but releases when too much strain is placed on the binding (as in the case of a fall). In the Nava System, this was provided by the sole plate and the ski bindings, in the same general way as any modern binding. The other function transmits sideways motions of the leg, which creates rolling motions around the long axis of the ski. This allows the skier to rotate the ski onto its edge, initiating a turn. With conventional boots and bindings, this is accomplished by using a very stiff plastic cuff locked around the lower leg. When the leg is rotated to the side, the cuff transmits the rotation through the bindings to the ski. The Nava System eliminated the stiff cuff and replaced it with a stiff plastic covered metal control arm. It extended straight up from the rear of the binding and was topped with a semi-circular cuff that fit the back of the calf. A plastic plate on the back of the boot spread the load onto the calf. When the leg was rotated to the side, the cuff transmitted this motion through the arm to the binding. The boot was eliminated from needing to transmit the forces. Nava claimed this resulted in more direct control. To enter the binding, the skier rotated the arm rearward, stepped into the binding, and released the arm so it rotated forward onto the calf. When the skier removed the bindings, or fell and was ejected, the arm rotated all the way to the ski. This made the cuff section extend past the bottom of the ski, forming a ski brake.

References

Notes

Bibliography

* V. Elaine Gilmore
"Bizarre binding for the slopes"
''Popular Science'', March 1989, p. 111 * Clint Swett

''Sports Illustrated'', 17 November 1986 * Seth Masia
"Almost Hits, Mostly Misses"
''Skiing Heritage Journal'', March 2005, pg. 35-38 * Tim Cole
"Advances In Ski Tech"
''Popular Mechanics'', December 1986, pg. 32 & 34 {{refend

External links

PhilPug's Nava Bindings On Volant SuperCarves
Skiing equipment