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  2. Oh sorry forgot to include hydraulics in the concepts considered. Decided not to "experiment" with 1,000 to 3,000 psi . 🤪
  3. Hello and thank you for looking 😀. I have loved flight simulators for 50 years and finally tried to build one myself. I have come up with one thats basically an upright hemisphere mounted on omni-directional wheeled frame for support. Unfortunately I cant come up with a method of simulator movement that doesn't have significant drawbacks. I am only asking for maybe a couple of ideas that maybe I haven't considered. Five considered solutions and their pros and cons: 1. The best idea that worked reasonably well was to use two pneumatic cylinders to move the sphere as sh
  4. Yesterday
  5. Of course they can cause vibrations...it is exactly the same as a flute! the AMPLITUDE of the vibrations, however, is going to be so low as to make them negligible! It is likely to whistle, but the only ay it could be anything other than a minor peculiarity is if it hit a resonant frequency...which SHOULD be checked for as a matter of course... (Tacoma Narrows Bridge)...check your shell frequencies and you should be fine.
  6. Last week
  7. The beauty of Engineering is its cross-disciplinary nature. I wouldn't suggest an architect design an aeroplane, but a structural engineer could!
  8. I had a look round and I can't find anything definitive. I always used to find the GRC a great resource, but its become a nightmare to navigate...this may be a start... https://www.grc.nasa.gov/www/k-12/airplane/shaped.html I would suggest it's a hybrid. On a flat plate, you have the face effects, and then the vortices draging against the back. This will have a "resolved face effect" and the same rear vortices. You may be able to find a reasonable facsimile by combining the two..? Good luck!
  9. Hi, I am having some trouble finding what drag coefficient to use for a right angled isosceles triangle with a gas flowing towards its angled face (like this: ->->◢). I would greatly appreciate it if anyone could let me know the coefficient of drag I should use or point me in the right direction with some reading. Many thanks
  10. A fascinating article, If you want to study at the top institute in India, you should consider for DY Pune
  11. Mechanical engineers are individuals who give life to the imagination of other people and transform their dreams into reality. Enoch Mayfield works diligently to provide effective solutions, which help to develop processes and products for a small component or a large plant and machinery. Their undeniable contributions in life make them the most versatile of all engineers. Enoch Mayfield has a comprehensive knowledge of the various latest techniques. These help him to conduct modeling, simulation, and analysis of different structural components without any effort. His expertise in
  12. I want to create a mechanical Venus fly trap. It is like a bear trap but instead of closing in a split second I want it to close very slowly. The spring is what makes it close fast. What can I replace the spring with to make it close very slowly? The link below is a tiny key chain bear trap from YouTube.
  13. Hi, thank you for your information! I am currently actively studying aircraft engineering, specifically aerodynamics and the analysis and design process, for my graduate work. This article https://engre.co/blogs/articles/main-landing-gear-for-the-light-aircraft-analysis-and-design/ it may also be useful for you to read, here are some interesting thoughts
  14. Earlier
  15. https://hizliresim.com/bmFUzo You can reach the question in the link. It s not so hard but I'm still confused. If you can help me I realy appreciation. Thanks
  16. Nice! would not want my fingers stuck in there...lol
  17. https://ibb.co/gMytGrq this is the image of my quiz, really apreciated for the help
  18. Can an engineer in one field work in another? for example, does an architect design airplanes?
  19. Hi Everett, This component is used in the rear fan case of gas turbine engine. The component is further divided in to 2 subassemblies. One made of titanium alloy and the other made of aluminum alloy Functions Titanium alloy subassembly : To provide necessary stiffness for the composite fan case. Aluminum alloy subassembly : To provide attachment points for thrust reverser unit clamps. Loads acting Titanium alloy S.A : Fan blade of loads, maneuvering loads. Al Alloy S.A : Weight of the thrust reverser unit doors. The Al alloy S.A will be attached to Ti
  20. hello please give me some examples about constant volume combustion.
  21. Not knowing the application and loads. The most likely screw sizes would be #10-32 UNJF-3A. This will require using MS21209F1-15L at minimum. If you using Boeing specs that would callout the holes to BACD2079N030B3R. If Airbus, I would have to look that up. Note: There would always be tensional loads. All Screws/Bolts are designed to have tensional loads. There are some that are shear loaded and those have a solid shank larger than the threads that require match reaming to shear load. The most common application for that method would be the seat tracks or structural framing.
  22. Hi Everett, Thank you for your reply. I have design problem where i am using a screw and helicoil insert to attach two components. The functional requirement is to hold the assembly during the transportation. There aren't any tensional loads acting on the screw. So which thread series should is use here., UNJC or UNJF. This is an aerospace application.
  23. I’m working on some designs for work and I have concerns with vibrations generated due to air running through small holes in what are effectively plates. These plates can be assumed to be static and shouldn’t cause audible vibrations. I’m concerned of the air moving through the holes. Due to the large pressure difference from moving through the hole can the air self generate audible vibrations? Is there anything i can read up on for this? I imagine it would be similar to cavitation but without the transition from liquid to vapour. I’m also running solidworks simulati
  24. See https://staqoo.ie/blog/types-of-screws-and-bolts/https://staqoo.ie/blog/types-of-screws-and-bolts/
  25. Vinay, the different types of bolt/screw heads have specific applications and some are cosmetic. Most are for different types of applications. For example, Countersunk heads are low profile and allow for placement in limited spaces, but due to its characteristics hole to hole tolerances would have to very tight and they are not for high load applications which might cause pull thru. The you have x-recess which also a low load applications where the strength is only what your hand can apply. Then we have the hex patterns where are mostly used in high load application. If you want to go even hi
  26. Important to note the direction of forces to fasten the screw, specially in non-metalic: sloted and Phillips need a perpendicular force on top of the rotating force, Insufficient perpendicular force favors damage of the head. Important in hard to reach locations.
  27. Interesting subject, I am currently involved in the analysis of a complex assembly build and the most common specified fixing is a button head set screw, followed by a cap head. Obviously a button head is more user friendly due to it's lower profile but I imagine it would lack the ultimate head strength of a button head due to the reduced cross sectional area. A circular button or cap head will give a more uniform clamping force distribution, even when either a button or hex head is used with a washer. I know there is a limit to the size range offered with socket head screws so
  28. Hi all I need to design an engine conveyor like that in the attached pictures. I just have some pictures taken from my colleagues. My problem for the moment is understand which would be the best connection to the shaft of the end hardened boss/sleeve. I know it need to be keyed for the transmission of the movement, but how to prevent the boss sliding out of the shaft? The only way I guessed is to use a grub screw. Is there any better, more adequate system? Thank you.
  29. Hi, i'm looking to actually build it. I'm more of a workshop person more than an engineer, and have built CNC machines before. I'm looking to build a CNC lathe, with the main focus being an air bearing spindle that can be used to do CNC small detail with miliarcseconds grade of control like typical servo motors, but also can do high speed and power when in the lathe function. I read books, and they made me think a multi phase induction motor would do me good, and i spend a good half a year making one. it works, but while a 6 phase motos can produce high power on air bearing, it's te
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