# Questions tagged [design]

Questions about or related to design.

151 questions with no upvoted or accepted answers
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### How is motor torque related to capstan equation?

I know that capstan equation relates $T_{in}$ and $T_{out}$ as $T_{out} = T_{in}e^{u \cdot F_c}$, where $u$ is friction coefficient and $F_c$ is wrap (slip) angle. In my situation, the capstan is ...
• 51
859 views

### Finding the velocity of water flowing through a gravel filled pipe

I have a scenario where I have water flowing through a gravel filled pipe, and I need to find the velocity. The pipe is gravity fed (no pumps). My approach is to find the seepage velocity ($V_s$) ...
• 51
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### How to compare small and large scale model of an IC engine to predict force, torque, rpm etc generated by actual engine?

I have this 6 cylinder radial engine designed in Solidworks. Rendering Blueprint (Source:Inventor Wizards) And I want to perform some motion analysis on this engine to make some prediction about it'...
• 41
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### How do I loop through annotations in NX using the NXOpen API in VB?

I'm writing a script to extract all the dimensions from a 2D drawing in NX. In doing so, I have been able to get the dimensions and tolerances on all sheets, along with the zone numbers. This has been ...
699 views

### How to estimate the number of elevators required in a building?

I've been asked to estimate the number of elevators in a mixed use building with 37 floors (4 basement-parking floors), & design their operation. Are their any specifications/guides/manuals that ...
60 views

### How to estimate effective area of contact between rough surfaces as function of surface roughness

The engineering problem that I am trying to solve is the following: I have two elements of a magnetic circuit that I must keep in contact through threaded fasteners. The primary objective is to ...
• 21
216 views

### How to design an enclosure around the load cell (Beam type)?

Hardware and Electronics Used: Arduino UNO, HX711 ADC Load cell amplifier, Load Cell (2Kg); Currently, I am working on a project which requires me to put load cell along with the other circuitry in an ...
718 views

### Does it matter what direction a herringbone gear turns?

Obviously, the forces and pressures should mostly be the same, but just in reverse. But when play, flex, and such are accounted for, are there any subtle differences to having a herringbone gear turn ...
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1 vote
465 views

### How to calculate bearing loads in a two stage helical gear box?

Here P, Q, R, S are the bearings and G1, G2, G3, G4 are four helical gears. The gear forces tangential(Kp), Axial(Ka), Radial(Kn) are known. All the distances are known. The forces acting on bearing ...
• 11
1 vote
83 views

### Dose adapter sleeve hinder the axial displacement of inner ring of spherical roller bearings?

This is supposed to be the locating bearing in my design, the outer ring is supported by the housing and a taconite seal (taconite seal is hidden). So it is fixed in place and can't move at all. ...
1 vote
30 views

### Calculating the proper power of a motor

I'm trying to build a filament extruder with some basic available tools and materials. Simply the main principle of the machine is to insert some amount of plastic raw material ( ABS in our Case ) to ...
• 121
1 vote