how to build a four legged robo for climbing a ladder??

i want to build a 4 legged manually controlled robot for a college competition which can climb a ladder which is placed at an angle of 90 degrees from the ground.and the robot must be of size 400mm X 400mm X 350mm .... please help me......

Maybe you could use rotating hooks?
well, if you can make pincer like attachments on the legs it could climb up using the outside of the ladder. Also would involve pushing/pulling mechanisms on the legs. Eg: 2 top claws extend and grab the side of the ladder -> pull up. bottom claws engage -> top claws disengage and arms extend -> bottom claws push up -> top claws engage, etc...
Jayefuu8 years ago
Does it have to have 4 legs? Or can it be wheeled?
pravy (author)  Jayefuu8 years ago
yes it should have 4 legs..... THE arena specificaions are 1.It consists of set of parallel rails of circular cross section 2.Diameter of cross-section and length of each rail is 25.4mm(1 inch) and 1000mm respectively. 3.The rails are spaced vertically by a distance of 200mm(center to center) 4.The structure raises to a height of 1612.7mm consisting of 8rails which are equally spaced.