Recent content by yonese

I have drawn the bending moment diagram to try to help me determine the moment, but I am certain my values are wrong. I have included a picture of my gearbox design, where the bottom shaft is what I'm trying to calculate. I've been able to calculate the top shaft moments and reaction forces...

I know what Boolean algebra and logic gates are, but I am having a hard time to describe how washing machines operate on digital electronics. Here's my attempt 'Washing machine have various functions like different cycle settings for various temperatures or cycle duration, or a delayed start...

Hi, I'm just using the basis that laminar flow is when Re > 4000. Correct me if I'm wrong, but are you saying that because the planform area of the airfoil (where the chord is 62mm) is larger than the frontal area of the prism and cylinder (l = 12.5mm), the Re number is what's been presented?

Hi, all 3 shapes have the same length of (L = 12.5mm), but I used the chord (c=62mm) for the airfoil instead to find its planform area instead. I can imagine that because the airfoil used a different length, this would affect the results plotted?

Thanks for your comment. The range for the prism and airfoil weren't what I expected. The prism didn't have values that were always turbulent like the cylinder (as I has expected it to as I expected both shapes to be fairly similar considering their characeristic length were the same). My data...

[Mentor Note -- Thread moved from the technical forums, so no Homework Template is shown] Hi all, Recently I 'did' (a virtual lab) a drag laboraty experiment that used a wind tunnel to measure drag coefficient of 3 different shapes (cylinder, airfoil, triangular prism) and I'm not convinced...

Thanks for commenting! :) Although I wasn't given the exact dimensions for the triangle, it seems to look the lengths are equal. With that being said, your explanation would make a lot of sense. I hadn't thought that recirculation could occur, as I only expected to see them in wakes past a...

Hi, thanks for commenting! :) The prism was supposedly orientated face leading, and I wondered whether it could have been facing the wrong way with point leading, causing the flow to look the way it does? (As this was an online laboratory with my teacher doing the lab live, but it was hard to...

Hi, Recently I did a drag lab which included doing an experiment to find the wake profile of 3 different objects. In order to measure the air speed downstream the object, a Pitot tube is used as shown in the image below. The end of the Pitot tube is vertical, and aligned with the flow...

Say I have a rod with a notch at the very centre and another ro with a notch at the very end. Both rods are identical in length radius materials etc. Who would be impacted by the notch more? And if then both were to support a load at the end of the rod (both in tension), what effects would the...

I have a solid cylinder of diameter 40mm and length 14mm and I have used plane stress approximations in my calculations so far. I know for to assume a thin walled cylinder/tube the wall thickness needs to be less than 1/20 of tube or cylinder diameter. However, what I have found so far is that...

Thanks. I completely forgot I had learned this... Thanks for refreshening my memory. Someone has kindly pointed out that I have attached two images... Could you tell I'm new? Correct me if I am wrong, but if I were the find the stress at point A in the second image (greyed out one), point A...

Thank you! I hadn't thought of eliminating section b2, which does make it simplier to understand the forces acting on the beam. I can understand whether point A would be in compresssion or tension if it were right on top of beam or under the beam, but since point A is 'on the side' of the beam...

Summary:: I'm stuck on a year 2 mechanics question. I have this simplified crankshaft with a load P at the end. The solutions to the exercise have said that point A is in compression due to a bending moment but I don't understand why that is. The solutions and my calculations have both come out...