Join the discussion of general engineering topics. The design, building, and use of engines, machines, and structures. Use the forum for any engineering topics not applicable to the specific categories.
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Threads
When is the distinction between science fields applicable?
- random_soldier
- · Replies 5 ·
Selling an older 3D printer from a defunct manufacturer
- LightningInAJar
- · Replies 2 ·
How Can Expedited Permits Unlock 2000 Gigawatts of Clean Energy?
- kuruman
- · Replies 2 ·
Measuring the Speed of Sound in Water, Using Faraday's Law
- KTBMedia
- · Replies 14 ·
Hydrostatic pressure in a narrow container
- RFreund
- · Replies 16 ·
Downdraft table -blocking off part of table surface to increase flow?
- Cringle
- · Replies 10 ·
We Bought a House (A materials question)
- DaveC426913
- · Replies 8 ·
Why haven’t we made blow up wings to fly with them
- kingsbishop
- · Replies 27 ·
NS Derailment, East Palestine, Ohio - 3 Feb, 2023 - Engineering Aspect
- Astronuc
- · Replies 9 ·
Optics for High Resolution Laser Imaging: Finding the Best Path
- Mike Gaffer
- · Replies 7 ·
Amtrak derailment, Sept. 25, 2021, near Joplin, Montana, US
- Astronuc
- · Replies 1 ·
Flooding and Stream area and speed
- fog37
- · Replies 11 ·
Can a Mason Jar Maintain a Vacuum for Powder Paint Storage?
- stryped
- · Replies 15 ·
Appropriate tightness of bolts between skateboard and trucks
- CynicusRex
- · Replies 17 ·
Surely this will NOT work: violation of conservation of momentum?
- gggnano
- · Replies 2 ·
Why does a shower mixer tap oscillate like a second order control system?
- billm
- · Replies 2 ·
Why are hovering cars impractical compared to wheeled cars?
- Abheer Parashar
- · Replies 17 ·
Saudi Arabia's "The Line" -- why?
- person123
- · Replies 2 ·
Most valuable trait for a scientist or engineer?
- neanderthalphysics
- · Replies 10 ·
Ensuring Compatibility: Important Measurements for SUV Rim Size
- DaveC426913
- · Replies 2 ·
Highest useful Fahrenheit temperature?
- Algr
- · Replies 39 ·
Problem Connecting Core with Face Plates (APDL)
- Anton223
- · Replies 1 ·
What lazy engineers achieve: A Rubiks cube that solves itself
- jack action
- · Replies 2 ·
Unsolved Engineering Problem: Runaway Anchor Drops
- anorlunda
- · Replies 68 ·
Using aquaponics to reduce evaporation from drought-affected reservoirs
- TechDIYaspirant
- · Replies 8 ·
What Really Happened at Arecibo
- jedishrfu
- · Replies 17 ·
Why are only two senses transmittable via technology?
- Algr
- · Replies 40 ·
Is Moore's Law Still Relevant in the Age of Semiconductors and Robosourcing?
- Gear300
- · Replies 23 ·
Question regarding water pressure and slopes
- Jstoff
- · Replies 5 ·
Can a Vertical Jet Engine Replace Helicopter Blades for Hovering Crafts?
- Hornbein
- · Replies 55 ·
"Holographic" Display with Rotating Blades
- Leo Liu
- · Replies 15 ·
Which sub-forum would be suitable for asking Q. related to rockets?
- Hall
- · Replies 1 ·
How could you move a substantial amount of air to a certain direction?
- Spockishere
- · Replies 4 ·
How Does Temperature Affect the Frequency of a Guitar String?
- piyush_1903
- · Replies 29 ·
What Do Smart Phones (Partially) Replace?
- anorlunda
- · Replies 188 ·
News What Can Nature Teach Us? Join the Natural Robotics Contest!
- robjds
- · Replies 3 ·
News Florida Collapsed Condominium had been sinking since 1990s
- Astronuc
- · Replies 199 ·
Adding CF4 to the Martian Atmosphere (terraforming)
- .Scott
- · Replies 6 ·
Squirrels and rats damaging AT&T fiber cables
- anorlunda
- · Replies 12 ·
I love Octonions as well as alternative propulsion ideas
- JarodY
- · Replies 4 ·
Is there a good source for construction blueprint symbols?
- theycallmevirgo
- · Replies 2 ·
Project Orion nuclear pulse propulsion revisited by lawyers
- anorlunda
- · Replies 13 ·
Could New Washing Machine Be Damaged by Delivery Guy?
- kyphysics
- · Replies 18 ·
How to use Simpack to change the profiles of a rail
- fzhkhel
- · Replies 3 ·
Blood pressure monitor calibration using water column
- NTL2009
- · Replies 28 ·
Can a Magnetohydrodynamic Drive Work Without a Tube?
- Godspanther
- · Replies 3 ·
Wondering if there are any construction contractors on PF (looking for opinions)
- triley
- · Replies 5 ·
NTSB Accident Report, Data Entry Error
- anorlunda
- · Replies 14 ·
Designing Retaining Wall Around Enclosed Area
- person123
- · Replies 11 ·
What is wrong with this picture?
- berkeman
- · Replies 54 ·
Simple(?) parabolic dish design question
- theycallmevirgo
- · Replies 2 ·
How much pressure in PSI was needed in the Ancient World to cut stones?
- philo
- · Replies 8 ·
Engine explodes out of tractor pull semi truck
- ElliotSmith
- · Replies 12 ·
Order of calculations for an air bubble system for dock de-icing
- downeast
- · Replies 14 ·
How to wire a house using 3 phase
- doggy
- · Replies 5 ·
Dehumidifier hygrometer reads 10% higher RH than handheld meter
- kyphysics
- · Replies 16 ·
Industrial CO2 laser temperature management
- theycallmevirgo
- · Replies 5 ·
Main bedroom ceiling fan not moving air like the others
- rsk
- · Replies 23 ·
What was the purpose of the small button on tube television receivers?
- homerwho
- · Replies 48 ·
How to measure flowrate using a differential pressure sensor
- CadisEtramaDiRaizel
- · Replies 8 ·
Fixed gear ratio and correction tape
- Leo Liu
- · Replies 6 ·
How does the "CLEAN" light on a coffeemaker work?
- NTL2009
- · Replies 3 ·
Rotate IMU data to obtain correct measurement data
- hoddy
- · Replies 2 ·
Can You Add Water to a High Efficiency Washer (There is So Little)?
- kyphysics
- · Replies 32 ·
Using Monopods for city travel utilizing linear induction motors
- Prathyush
- · Replies 95 ·
Wood as a carbon neutral biofuel
- artis
- · Replies 31 ·
Are C7 Christmas Lights Too Hot for a Real Tree?
- Greg Bernhardt
- · Replies 19 ·
Why doesn't the tape trick work with scotch tape?
- Twigg
- · Replies 3 ·
Millennium Tower, San Francisco, leaning more than predicted
- Astronuc
- · Replies 4 ·
How will the flood outflow be affected by this new diversion?
- Point Conception
- · Replies 8 ·
Pixelation of bitmap images (pixel size, pixel density, resolution)
- fog37
- · Replies 31 ·
Plug the Closed Ends of a Pipe at Depth and Bring it to the Surface
- Guest_Alpha0
- · Replies 4 ·
Heat transfer in HVAC systems
- treB321
- · Replies 4 ·
Impedance/admittance (acoustic) models for outdoor ground and seafloor
- bustun
- · Replies 12 ·
History of "percent grade" for slope esp. in civil engineering?
- The Bill
- · Replies 12 ·
International Harvester HT340 Turbine Tractor
- jack action
- · Replies 5 ·
Heavy Construction Equipment Tier List
- ergospherical
- · Replies 7 ·
Water deformation subjected to ultrasound waves
- loophole
- · Replies 4 ·
Measuring your body volume without getting wet
- sophiecentaur
- · Replies 13 ·
Insights When Science is Not Enough: Legal and Health Implications of Questions
- jack action
- · Replies 18 ·
Would a 2-metre hollow steel post with 3mm walls support my weight?
- MikeMarshall
- · Replies 8 ·
What's the load capacity of 6 aluminium posts?
- MikeMarshall
- · Replies 5 ·
Safety Recalls of Vehicles and Equipment
- jack action
- · Replies 2 ·
PEX Pipe in Residential Subfloor Thermal Mass
- DoctorLem
- · Replies 4 ·
Air conditioner dust getting into lungs?
- Cobul
- · Replies 2 ·
Allowable uniform loads - W beams vs. LVL
- yahastu
- · Replies 2 ·
Truss behaviour, load-deformation curve
- SofiaB
- · Replies 3 ·
Energy and environmental engineering silly question
- t0mm02
- · Replies 3 ·
Prof Festo's Fantastical Flying Robot Menagerie
- jedishrfu
- · Replies 2 ·
Freeing the stuck container ship Ever Given in the Suez Canal
- Astronuc
- · Replies 72 ·
What STEM project can I do to fascinate an examination board?
- greg_rack
- · Replies 14 ·
Gyroscopic stabilization and the cameras used in MotoGP on-bike video feeds
- berkeman
- · Replies 2 ·
4x4" Square Tubing Generator Stand
- klamberth27
- · Replies 6 ·
Is Having a House Really Important?
- Kran228
- · Replies 3 ·
Building a rooftop for workshop
- Rod_trad
- · Replies 2 ·
How many steel profiles do I need to support a workshop roof in Santiago, Chile?
- Rod_trad
- · Replies 3 ·
Correct bore sizing for a shower hose for a pumped water supply
- reddwarf4ever
- · Replies 2 ·
Satellite component failures in orbit from thermal and radiation damage
- Tone L
- · Replies 3 ·
De-icing the wind turbines in Texas
- hagopbul
- · Replies 22 ·
LiFePO4 battery heater project (makes sure battery doesn't freeze)
- mess
- · Replies 16 ·