Most active questions
83 questions from the last 30 days
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Why steam locomotive pistons don't have inertia?
Looking at steam locomotives, the wheel bars that go in and out of the cylinder change direction instantaneously.
There is no gradually slowing down in the original direction then coming to a halt, ...
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2
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Looking for Help with Air Cylinder Selection for X-Z Slide Configuration
I'm currently working on a new project and need some guidance in selecting the right air cylinder setup. I’m using an X-Z configuration with two air slides:
X-axis: MXW20-225B-M9BWL
Z-axis: CXS2L25-...
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2
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59
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What is the most efficient way to transport large quantities of rock over long distances?
I'm working on a project that requires moving massive amounts of rock (e.g., mining, construction, or quarrying operations). The goal is to determine the most efficient transportation method in terms ...
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0
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76
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Would an elongated rocket launch tube 'now' be feasible and economical?
The general idea is to make rocket launches far more economical than they currently are... maybe even within eventual affordable range for the general populace! The goal of a tube is to significantly ...
- 101
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1
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68
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Axial load profile for a submerged pipe. How can this textbook be correct?
In "Well completion design" by Bellarby, first edition (2009), the author discusses buoyant force and gives an example of an open-ended pipe which is partially submerged in liquid and ...
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1
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Determining the number of Teeth
I have a red gear with diameter d and n teeth, which drives a cyan gear with diameter D and an unknown number of teeth N. How do I determine the correct minimal number of teeth for the cyan gear if I ...
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2
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46
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Vehicle collision: between two smaller vs two larger vehicles
Consider the case where two identical vehicles have a frontal collision. Both vehicles have the same speed.
Would it be safer for the occupants if the collision was between small vehicles or if it was ...
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1
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41
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Why are maritime salvage operations so rare?
I am having a discussion on why we rarely recover ships that have sunk, while we have repeatedly landed on the moon, which is also a tremendous engineering challenge.
The discussion boiled down to ...
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58
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Vibration System Equation of Motion
I am trying to solve the following problem and i included my calculations (removed solving steps to summarize).
Can you check if my assumptions are correct and help me to how to draw mode shapes for ...
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1
answer
35
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What happens on loss of coolant in gas cooled nuclear reactor?
For example if gas cooled nuclear fission reactor loses its coolant (CO2 or helium) due to a leak, what would happen. I expect it would be replaced by air which, if I understand correctly would ...
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47
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Finding wall pressure on 400 mm dia pipe?
I need to find the pressure on walls of pipe having dia 400 mm. The other information that i have is
130000 UK Gallons/hour water is moving through this pipe which means velocity is 1.31 m/s.
The ...
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1
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44
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Slowly rotate a 3/4-inch cylinder for angle grinding using basic garage tools
Background:
I have a end mill with a 3/4-inch shank: Rannb 1" Cutting Diameter Straight Shank 4 Flute Spiral End Mill Cutter Drill Bit Tool(1"×1")
I want to use the end mill in a drill ...
- 523
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2
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46
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Mass Flow Rate of Cold Water Pump in a Heat Exchanger, I think my study material is incorrect?
I am currently doing an assessment, and I believe the study material I have been given by the training collage may be wrong. Obviously, i need a second opinion and struggling to find a good example ...
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1
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38
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32" fan blowing through 24" tube
I currently have a 24" chimney fan rated at about 10000 CFM blowing through a 24" tube. If I were to make a cone so that I could install a 32" fan to blow through the same 24" tube,...
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2
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Make T-nut for drill press table T-slots using basic garage tools
I have a 15-inch Mastercraft drill press that has a table with T-slots.
Approximate T-slot dimensions:
Bottom slot width: 29mm
Top slot width: 15mm
Slot height: 19mm
I want to use drill press locking ...
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