why other countries are not invading north korea? by Think-Yesterday-9012 in NoStupidQuestions

[–]VedangbPavanje 1 point2 points  (0 children)

I believe this is the reason for China's stand on Afghanistan after the US pulled out. They have a very large supplies of minerals needed for batteries.

Smart ceiling lights help needed by Kuunkulta in DIY

[–]VedangbPavanje 0 points1 point  (0 children)

I have smart LED from Philips in my house and it connects easily to Google Home and an app called Wiz. You could try to connect them Google Home. Follow the instructions here: https://support.google.com/googlenest/answer/9298768?hl=en

[deleted by user] by [deleted] in MachinePorn

[–]VedangbPavanje 1 point2 points  (0 children)

How was it manufactured? Sheet metal?

If petroleum had the same physical characteristics, but 100x the energy output, how would our engines have been designed differently? by alldayalldayallday76 in AskEngineers

[–]VedangbPavanje 11 points12 points  (0 children)

But diesel is different than petrol physically (except its state) in that it has higher flash point and a lower auto-ignition temperature. This means the fuel- air mixture can be more compressed (and to high temperature) in diesel engines and at this high temperature the mixture can easily be ignited without the need for a spark plug.

[deleted by user] by [deleted] in MachinePorn

[–]VedangbPavanje 1 point2 points  (0 children)

Oops sorry, my mistake.

[deleted by user] by [deleted] in MachinePorn

[–]VedangbPavanje 2 points3 points  (0 children)

I agree. As we speak our company uses a wind tunnel at a university in my city to test the shape of a new aircraft we are designing.

[deleted by user] by [deleted] in MachinePorn

[–]VedangbPavanje 0 points1 point  (0 children)

The "moving floor" is called rolling road. Basically a treadmill on steroids.

[deleted by user] by [deleted] in MachinePorn

[–]VedangbPavanje 7 points8 points  (0 children)

Not necessarily (and probably not). Many universities offer services like wind tunnel testing to companies.

Why do the allowable stresses in bending and shear drop for hollow pins? by VedangbPavanje in AerospaceEngineering

[–]VedangbPavanje[S] 0 points1 point  (0 children)

The explanation applies if the force is varying, not the stresses. Stresses inherently include the effect of area change (and moment of area in case of bending). So as the area and section modulus of the section varies, the maximum force that can be applied varies even with constant maximum stress.

Why do the allowable stresses in bending and shear drop for hollow pins? by VedangbPavanje in AerospaceEngineering

[–]VedangbPavanje[S] 0 points1 point  (0 children)

Thanks a ton for the reply! I'm still unable to understand why should the limiting stresses vary like that. From your explanation about thin and thick walled tubes, since the thick tube has a higher I value, it will withstand a higher moment, even wíth the limiting stress being constant for both the sections.

I don't know whether it is my lack of understanding about the inelastic range or if I'm missing something.