General Engineering Forum

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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.
What's wrong with this math: A lot of thrust and almost no fuel?
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Troubleshooting Pneumatic Interlock Switch for Machine Safety
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Finding the Equivalence Ratio of Combustion (Methane + Air)
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Calculating the force that a permanent magnet exerts on a particle
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Calculating total heat transfer by solar water heater
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Looking for basic theory on mixing of gases
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Highest useful Fahrenheit temperature?
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Tilting a 55 Gal Plastic Drum: Calculating Force Needed
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Problem Connecting Core with Face Plates (APDL)
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Could steam cars be possible in the 2020s?
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What lazy engineers achieve: A Rubiks cube that solves itself
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How to model the behavior of a closed loop position system?
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How to calculate the leak rate based on pressure drop
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Unsolved Engineering Problem: Runaway Anchor Drops
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Can Aquaponics Help Conserve Water in Times of Drought?
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Can I move a macro object at a very small distance (around 10 nm)?
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What Really Happened at Arecibo
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Why Was the DCSS/ICPS Designed This Way (launch vehicle)?
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Getting an exact amount of Methane out of a cylinder
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Why are only two senses transmittable via technology?
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Is Moore's Law Still Relevant in the Age of Semiconductors and Robosourcing?
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Using compressed air through a venturi pump to suck oil?
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Can every symmetric matrix be a matrix of inertia?
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Question regarding water pressure and slopes
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How can I get rid of air buildup in a siphon system?
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Maximizing Comfort and Efficiency: Tips for Heating Your Home
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Intro text on building a small fluid pressure chamber?
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Heat Transfer Through a Two Material System due to a Light Source
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"Holographic" Display with Rotating Blades
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Questions about energy generation from coal
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A solar powered air conditioner
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How could you move a substantial amount of air to a certain direction?
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Looking for waterproof alternatives to OSB for subfloors
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How Does Temperature Affect the Frequency of a Guitar String?
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What Do Smart Phones (Partially) Replace?
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Difference in clamping force between bolts and screws
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Searching for Low Impact Fluid with Boiling Point of 150-180 F
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Question about fluid flowing into branching pipes
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What Grade of Brass or Cast Iron is Used for Worm Wheels?
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Need Help with Heat Exchange Calculations for Cosplay Suit Idea
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Can Vacuum Airships Overcome Structural Challenges for Feasible Flight?
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Question about electrical power compared to mechanical power
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Help with thrust and HP needed to hover 300 pounds at 30' off the ground
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In Search of: Cheap/common pressure switch
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Inconsistent flow rate measurements of an engine diesel fuel
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Heat Flow in a Pipe with integrated Sensor
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Properties that are important to Worm Wheel functions
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Is a 5 Ton Jack-Powered Generator Feasible and Profitable?
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Question about flow from a nitrogen bottle
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Squirrels and rats attacking AT&T fiber
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I love Octonions as well as alternative propulsion ideas
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Can You Turn a CUBE on a LATHE?
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Help Identifying Source of Sliding Adhesion Coefficient Equation
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Is there a good source for construction blueprint symbols?
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Methanol - H fuel cells for marine transport
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Find hole size for allowable leak in pressure vessel
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Hydraulic Losses Through a Pipe
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Can a hole in my garage floor keep it warm in winter (geothermal heat)?
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Cooling of a thick walled pipe transporting water
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Finding specific heat C_p coefficients using NIST
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How long would a lever have to be to compete with a hydroelectric dam?
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Quick-adjusting linear actuator?
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How to use Simpack to change the profiles of a rail
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Please help explain this Blood Pressure Monitor 'calibration' system
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Why Is Y Considered 1 in Antenna Power Gain Calculations?
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What is the Purpose of This Aluminum Laser with No Markings?
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Can a Magnetohydrodynamic Drive Work Without a Tube?
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Producing Renewable Liquid Fuels from Atmospheric Carbon Dioxide
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Wondering if there are any construction contractors on PF (looking for opinions)
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NTSB Accident Report, Data Entry Error
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Engineering calculations as a deliverable: standards and references
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Keeping food hot in food delivery bag
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What electric motor do I need to rotate a platter that weighs 6 - 10lbs?
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SolidWorks Sketching Visual Problem
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Looking for Pneumatic control valve information
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Elasticity of a Tubular Cantilever Beam
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Collimating image from an LCD display
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Designing Retaining Wall Around Enclosed Area
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What is wrong with this picture?
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Simple(?) parabolic dish design question
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Pedrail Wheel -- Looking for the physical explanation
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Pick the Best Compressed Air Inlet for Loop Pipeline
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GD&T- Positional tolerance question
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How much pressure in PSI was needed in the Ancient World to cut stones?
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Order of calculations for an air bubble system for dock de-icing
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Force to Close/slam a steel door gate
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At last: a practical Energy Harvesting proposal?
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Airflow thru 6 mesh, .035 gauge screen
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How to Factor Vapor Retarders into Relative Humidity & thus Mold Risk
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Question About Electric Aircraft Propulsion
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My Dehumidifier Hygrometer Differs From Handheld by 10% on RH....OK?
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Odd question - what is the most staining gas/smoke you've worked with?
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Industrial CO2 laser temperature management
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What is the most effective tap for threading stainless steel?
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What was the purpose of the small button on tube television receivers?
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Silvaco TCAD question -- adding texturing
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Which variables determine the exact output of this condensing device?
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How to measure flowrate using a differential pressure sensor
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Force on submerged plate perpendicular to flow
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How does the "CLEAN" light on a coffeemaker work?
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