Early tracked landing gear aircraft successful in the 1950s!
XB-36 Peacemaker Ultra-Heavy Bomber
A Retired USAF C-130 pilot writes about the C-82 with tractor gear experiment shown here:
"Mike...the C-82 with tractor gear. Only one was produced, but the idea was to reduce the pressure exerted from 60 psi to 20 psi and give it the capability to land anywhere."