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.
Methanol - H fuel cells for marine transport
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24
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1K
Find hole size for allowable leak in pressure vessel
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6
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1K
Hydraulic Losses Through a Pipe
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1
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833
Can a hole in my garage floor keep it warm in winter (geothermal heat)?
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9
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1K
Cooling of a thick walled pipe transporting water
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4
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865
Finding specific heat C_p coefficients using NIST
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6
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926
How long would a lever have to be to compete with a hydroelectric dam?
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5
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818
Quick-adjusting linear actuator?
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7
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947
How to use Simpack to change the profiles of a rail
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3
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861
Please help explain this Blood Pressure Monitor 'calibration' system
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28
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2K
Please help me understand antenna power gain…
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11
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903
Can you identify this laser?
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3
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850
Magnetohydrodynamic drive
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3
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721
Producing Renewable Liquid Fuels from Atmospheric Carbon Dioxide
2
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39
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2K
Wondering if there are any construction contractors on PF (looking for opinions)
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5
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748
NTSB Accident Report, Data Entry Error
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14
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1K
Engineering calculations as a deliverable: standards and references
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2
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706
Keeping food hot in food delivery bag
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19
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5K
What electric motor do I need to rotate a platter that weighs 6 - 10lbs?
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7
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975
SolidWorks Sketching Visual Problem
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3
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891
Looking for Pneumatic control valve information
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9
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1K
Elasticity of a Tubular Cantilever Beam
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8
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934
Collimating image from an LCD display
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31
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5K
Designing Retaining Wall Around Enclosed Area
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11
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946
How To Convert Kvs-Value For Water To Kvs For Gas?
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1
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897
What is wrong with this picture?
2
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54
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3K
Simple(?) parabolic dish design question
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2
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913
Pedrail Wheel -- Looking for the physical explanation
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9
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1K
Pick the Best Compressed Air Inlet for Loop Pipeline
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7
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947
GD&T- Positional tolerance question
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3
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782
Why is MRI machine use so expensive?
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15
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1K
How much pressure in PSI was needed in the Ancient World to cut stones?
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8
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1K
Order of calculations for an air bubble system for dock de-icing
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14
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1K
Force to Close/slam a steel door gate
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1
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819
At last: a practical Energy Harvesting proposal?
2
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51
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4K
Airflow thru 6 mesh, .035 gauge screen
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6
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854
How to Factor Vapor Retarders into Relative Humidity & thus Mold Risk
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3
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656
Question About Electric Aircraft Propulsion
4
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139
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23K
My Dehumidifier Hygrometer Differs From Handheld by 10% on RH....OK?
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16
Views
830
Odd question - what is the most staining gas/smoke you've worked with?
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10
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936
Industrial CO2 laser temperature management
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5
Views
853
Best tap for stainless steel?
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31
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25K
Tube television reception
2
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48
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5K
Silvaco TCAD question -- adding texturing
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10
Views
910
Which variables determine the exact output of this condensing device?
2
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54
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2K
How to measure flowrate using a differential pressure sensor
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8
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3K
Force on submerged plate perpendicular to flow
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3
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784
How does the "CLEAN" light on a coffeemaker work?
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3
Views
599
Rotate IMU data to obtain correct measurement data
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2
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1K
Venturi Suction question
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2
Views
508
Traction Confusion
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14
Views
759
Exploring the Law of Conservation of Energy with a 5kg Weight and 10L Bucket
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1
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557
Why did my roller luggage's wheels stop turning smoothly?
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5
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3K
Can You Add Water to a High Efficiency Washer (There is So Little)?
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32
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2K
Calculating force on a syringe plunger for a viscous fluid?
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10
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1K
Using Monopods for city travel utilizing linear induction motors
3
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95
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3K
Wood as a carbon neutral biofuel
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31
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1K
Hydraulic Liftgate
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5
Views
557
Why doesn't the tape trick work with scotch tape?
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3
Views
773
CNC laser exhaust
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12
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936
Radar and imaging technology
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8
Views
870
CNC laser cutter design
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1
Views
755
Fluid flow rate calculation
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13
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1K
Cooling tower -- hot and cold water tanks
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11
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1K
Would 2x 5.5" Fans attached to Wye Duct pull efficiently?
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2
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631
How will the flood outflow be affected by this new diversion?
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8
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3K
Most compressible volumes: synthetic fibre versus natural eider down?
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1
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412
Ansys workbench Composite Analysis
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22
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10K
Is orbital solar a bust?
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32
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2K
Ansys workbench CZM method
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1
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1K
How to select the required accuracy of an instrument?
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5
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709
Problem with different hydraulic connection sizes on CNC machines
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2
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645
How to calculate airplane noise as a function of distance?
2
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49
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3K
Magnetizing a ferromagnetic material
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3
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634
A Carnot engine between the Earth's poles and equator
2
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67
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3K
Change the application pole of the moment of a force
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18
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935
Parallel fans in same ducting system
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4
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777
Air-to-Water Heat Exchanger - Car radiator
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10
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2K
Pixelation of bitmap images (pixel size, pixel density, resolution)
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31
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1K
Plug the Closed Ends of a Pipe at Depth and Bring it to the Surface
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4
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658
Instrument accuracy and comparison measurements
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17
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826
Opening mechanism for a bicycle kickstand
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9
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981
Installing Snap Ring on a Shaft with Larger OD
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4
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791
Torsion spring calcualtion for 12 ounces of weight
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6
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2K
Impedance/admittance (acoustic) models for outdoor ground and seafloor
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12
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540
History of "percent grade" for slope esp. in civil engineering?
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12
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1K
Iron and steel industry flows: A question
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2
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785
International Harvester HT340 Turbine Tractor
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5
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770
Bold, Monster, Engineering Successes
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32
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2K
Submarines that don't use compressed air to sink and rise?
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9
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1K
How much weight I can spin on a motor?
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11
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985
Floating a cruise ship in a bucket of water
4
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112
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5K
A portable Venturi Vac system?
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16
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1K
Water deformation subjected to ultrasound waves
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4
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1K
Measuring your body volume without getting wet
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13
Views
676
Spectrometer sensitivity (photons/count) at different wavelengths
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5
Views
587
Maximizing Boat Speed: Exploring Human Power Ratios
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9
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861
Stepper motor maximum speed
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2
Views
838
Theoretically… if I stood on a 2-metre-tall wooden post
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8
Views
646
What's the load capacity of 6 aluminium posts?
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5
Views
1K

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