▁invent ed ▁the ▁self - o iling ▁hub ▁and ▁de vised ▁the ▁innov ation ▁of ▁mach ining ▁the ▁c rank arm ▁and ▁ped al ▁on ▁the ▁left ▁side ▁with ▁left - hand ▁threads ▁to ▁prevent ▁the ▁ped al ▁from ▁coming ▁uns cre wed ▁while ▁cy cling . ▁The ▁brick ▁building ▁at ▁ 2 2 ▁South ▁Williams ▁St ., ▁where ▁the ▁Wright s ▁worked ▁from ▁ 1 8 9 5 ▁to ▁ 1 8 9 7 , ▁is ▁the ▁only ▁ext ant ▁building ▁on ▁its ▁original ▁foundation ▁and ▁in ▁its ▁original ▁location ▁that ▁hous ed ▁a ▁Wright ▁b icy cle ▁shop . ▁They ▁ran ▁their ▁printing ▁shop ▁on ▁the ▁second - floor . ▁The ▁ 2 2 ▁South ▁Williams ▁Street ▁building ▁is ▁part ▁of ▁Day ton ▁A viation ▁Heritage ▁National ▁Historical ▁Park ▁and ▁the ▁National ▁A viation ▁Heritage ▁Area . ▁ ▁The ▁Wright s ▁used ▁the ▁prof its ▁from ▁the ▁Wright ▁Cy cle ▁Company ▁to ▁fin ance ▁their ▁av iation ▁experiments . ▁In ▁ 1 9 0 1 ▁they ▁fitted ▁a ▁third ▁b icy cle ▁wheel ▁hor izont ally ▁above ▁the ▁front ▁wheel ▁of ▁one ▁of ▁their ▁St . ▁Cla ir ▁b icy cles ▁and ▁used ▁the ▁appar atus ▁as ▁a ▁test ▁platform ▁to ▁study ▁air fo il ▁design . ▁They ▁built ▁a ▁six - foot ▁wind ▁tunnel ▁on ▁the ▁second ▁floor ▁of ▁their ▁b icy cle ▁shop ▁at ▁ 1 1 2 7 ▁West ▁Third ▁St ., ▁the ▁last ▁location ▁of ▁their ▁b icy cle ▁business , ▁and ▁from ▁October ▁to ▁December ▁they