r/EngineeringPorn is a subreddit with 1.4M members. The most common kinds of discussions are solution requests, and the community frequently discusses engineering, technology, innovation, aviation, and mechanical.
Popular Themes in r/EngineeringPorn
#1
Solution Requests
: "I used 4 old smartphones to build a "poor mans lidar" robot for under $250. need some depth calibration advice"
1 post
Popular Topics in r/EngineeringPorn
#1
Engineering
: "German Engineering is really on a whole other level."
38 posts
#2
Technology
: "The flight deck of a Concorde supersonic airliner, One of the most complex cockpits in history it is known for its extreme complexity, featuring over 1,000 switches and dials"
19 posts
#3
Innovation
14 posts
#4
Aviation
: "The flight deck of a Concorde supersonic airliner, One of the most complex cockpits in history it is known for its extreme complexity, featuring over 1,000 switches and dials"
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
: "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"
8 posts
#7
Machinery
: "Liebherr Generation 8 Crawler Bulldozer Production in Austria"
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
: "A New Engineering Theory of Pyramid Construction: A Continuous Multi-Stage Sledge Elevator System with Plain Bearings and Liquid Lubrication (3-Sheet CAD Project)"
4 posts
Member Growth in r/EngineeringPorn
Yearly
+80k members(5.9%)
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Last updated: August 21, 2026