Se chen an pin ki fet pa yon hyperbolic ak chen pou diminye friksyon la. Li te itilize nan plas kote pouvwa a se relativman gwo ak vites la kouri se ralanti. Li te evidan avantaj sou kondwi a senti, tankou pneumatic compresseurs.
Chen peny kre pou transporte, yon sel plante, doub plante, kou long. Dokiman siplemante oswa crossbars ka antre nan nenpot lyen chen san yo pa bezwen demontre chen an. Chen an doub-plante gen gwo woulet ak ti woulet; epese a nan plak la chen se regilye ak epe; atachman a (plak koube) gen kat fom: sel-sided twou sel (A1 kalite), sel-sided doub twou (kalite A2), double twou nan yon sel (kalite K1), double bo doub twou (K2 kalite).
