r/EngineeringPorn is a subreddit with 1.4M members. The most common kinds of discussions are ideas and solution requests, and the community frequently discusses engineering, technology, innovation, aviation, and mechanical.
Popular Themes in r/EngineeringPorn
#1
Ideas
: "I built a removable, motorized H-gate manual shifter for a paddle-shift Ferrari. CAN bus integration, no modifications to the car"
4 posts
#2
Solution Requests
: "Silver Swan Automaton… no motors, built in 1773 and still working perfectly. powered entirely by mainsprings and brass clockwork gears."
2 posts
Popular Topics in r/EngineeringPorn
#1
Engineering
: "German Engineering is really on a whole other level."
38 posts
#2
Technology
: "a book of interlocking gears"
19 posts
#3
Innovation
: "a book of interlocking gears"
14 posts
#4
Aviation
: "HMS Queen Elizabeth in the North Atlantic"
9 posts
#5
Mechanical
: "This device is a Torpedo Data Computer (TDC), a Mechanical analog computer used aboard US Navy submarines during World War II, It calculated real time firing solutions for torpedoes by solving complex trigonometric problems using gears and cams long before electronic chips"
9 posts
#6
History
: "Silver Swan Automaton… no motors, built in 1773 and still working perfectly. powered entirely by mainsprings and brass clockwork gears."
8 posts
#7
Machinery
: "Changeover from Figaro's Wedding to Romeo & Juliet involves Machinery and some handwaving."
7 posts
#8
Vehicles
: "I used 4 old smartphones to build a "poor mans lidar" robot for under $250. need some depth calibration advice"
6 posts
#9
Manufacturing
: "How brown paper bags are made"
5 posts
#10
Construction
: "In 1930 the Indiana Bell building was rotated 90°. Over a month, the 22-million-pound structure was moved 15 inch/hr... all while 600 employees still worked there. There was no interruption to gas, heat, electricity, water, sewage, or the telephone service they provided. No one inside felt it move"
4 posts
Member Growth in r/EngineeringPorn
Yearly
+80k members(6.0%)
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Last updated: July 20, 2026