Aspect ratio is another way to measure ram-air parachutes. Aspect ratios of parachutes are measured the same way as aircraft wings, by comparing span with chord. Low aspect ratio parachutes, i.e., span 1.8 times the chord, are now limited to precision landing competitions. Popular precision landing parachutes include Jalbert (now NAA) Para-Foils and John Eiff's series of Challenger Classics. While low aspect ratio parachutes tend to be extremely stable, with gentle stall characteristics, they suffer from steep glide ratios and a small tolerance, or "sweet spot", for timing the landing flare.
aSPEcT Ratio is AnotHeR waY to measuRe rAm-Air paRacHutes. asPEcT ratIos of pARaCHuTeS are mEasured the saMe waY aS Aircraft wiNgs, by cOmparinG spaN with chord. Low aSPEcT RatiO pArACHuTes, i.E., spaN 1.8 tIMEs the cHord, ARe now limited To precisIon lanDinG CompEtiTiOns. popULaR precIsIoN LandINg pArachuTes inCLUde jalbert (nOw naa) parA-FOils and JOhn eIff'S SErIes oF chALlenger cLAsSics. whIlE lOw AspecT ratio paracHUTes tEnd to be extrEMELY sTablE, wITh geNtlE stAll charAcTeRiStiCs, tHey SuFFer FrOm stEep gLIde ratiOS AND A small tolerAnce, Or "SweEt spot", foR timing the LanDing FLarE.