Foornaynta warshadaynta waxaa lagu sameeyaa majarafado ama dubbe ay ku shaqeeyaan hawo cadaadis leh, koronto, hawo-qaadayaal ama uumi. dubbayaashani waxa laga yaabaa inay lahaadaan miisaan is-celin ah oo kumanaan rodol ah. Dubeyaal quwad yar yar, 500 lb (230 kg) ama miisaan is-beddel ka yar, iyo madbacadaha hawo-qaadista ayaa sidoo kale caan ku ah tumaalayaasha fanka. Qaar ka mid ah dubbayaasha uumiga ayaa weli sii isticmaalaya, laakiin waxay noqdeen kuwo duugoobay iyadoo la heli karo ilo koronto oo kale, ku habboon.