The present note describes a very simple and economic, yet highly successful, concept which makes use of two standard bicycles and should prove useful in developing countries.
References
1.
SchwandtD.LeiferL.AxelsonP.GainesR.WongF. Arm-powered tandem for disabled and able-bodied to ride together. Rehabilitation Research and Development Centre, Veteran's Administration Medical Centre, Palo Alto, CA1984; 1–2