By Date
Seed replicator
0 comments
Solar panel
0 comments
Bi-fuel gas engine
0 comments
Self refueling engine
0 comments
Self fueling engine
2 comments
Diesal/Oil engine with variable speed
0 comments
3 bit binary adder/subtractor
0 comments
V-4 engine with turbo
0 comments
Diesel engine
0 comments
'Drum' engine
0 comments
Art or something
0 comments