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  1. WolfHR

    German gear box

    Don't know what it stands for, but here (in Croatia) we also use "i" for gear ratio... Many of our earlier standards were based on DIN standards so that's no big surprise.
  2. WolfHR

    Cam and pawl differential, continued...

    RossABQ, the reason for this assumption is the different number of lobes on each of the cams (IIRC the radial diffs typically had 13 lobes on inner cam and 15 on outer- so this type would have different number of lobes on left and right cam)- but the way I see it cam & pawl diff does not work...
  3. WolfHR

    Cam and pawl differential, continued...

    It's axial cam and pawl diff, but I'm intrigued a bit about opting for wedge profile for cams and pawls... I would think it's supposed to give some 'preload' i.e. to increase torque difference between wheels required for diff to unlock (I'm still of the opinion I think I've expressed in older...
  4. WolfHR

    Bolt make-up to ¦3% tension

    I'm by no means an expert, but I suspect the key to this is the wording in the requirement: "using a method that has been shown to result in a stress range between 67 % and 73 % of the bolt’s material yield stress." Albeit not being a native English speaker, I see this as: you do a series of...
  5. WolfHR

    infinite or none? does a circle has infinite corners or none?

    I have no doubt, Cockroach, and I entirely see your point and concur*. Although... I'm a lazy git, so I'd start with triangle and just because of convenience increase the number of sides twofold. Admittedly, if we were going all the way to infinity, my method would not be any faster than the one...
  6. WolfHR

    infinite or none? does a circle has infinite corners or none?

    Cockroach, re. your definition/proof of circle as polygon with infinite sides (and I say this half serious)- it's all well but the first polygon (triangle) you mention was already inscribed in something called circle... So, by that definition a circle is already well established fact when we...
  7. WolfHR

    infinite or none? does a circle has infinite corners or none?

    Rb1957, I concede defeat in providing google support of my definition... FWIW, I asked on a mathematical board where one member called it 'a good intuitive definition' and even took trouble to post a proof that it's valid (which I will not post here because I don't understand the method of proof...
  8. WolfHR

    infinite or none? does a circle has infinite corners or none?

    OK, I'll look it up rb1957- but I'm positive it's the definition I was taught at high school (math oriented gymnasium) and at college, as well as my grandfather, who was college professor of descriptive geometry, using it...
  9. WolfHR

    infinite or none? does a circle has infinite corners or none?

    Well, rb1957, I know a proper mathematical definition of a tangent, otherwise I wouldn't presume to correct as knowledgeable and respected member as IRStuff. You may choose to adopt more practical, if less accurate, interpretation but... The definition I gave is as far as I know the only...
  10. WolfHR

    infinite or none? does a circle has infinite corners or none?

    Sorry to be pedantic, IRStuff, but as far as I recall- as per definition, tangents intersect a circle at two infinitesimally close points.
  11. WolfHR

    ball stud parts availability

    Have you tried checking in SWAG catalogues (they carry parts for cars & light commercial vehicles), or something like that? The reason I mention it is because they list mfg. part numbers, but their own as well- which is useful because you can find out if any other vehicle uses the same part and...
  12. WolfHR

    Recommend the best design book or website for the inexperienced MechE

    I found the book "Vertigungstechnik" by Fritz & Schulze quite useful- lots of *dos* and *don'ts* when it comes to design for manufacture (how to design and what to avoid in, say, welded or bolted constructions, cast, forged or machined parts, &c). I've been told there is an english translation...
  13. WolfHR

    At limit tire treatment for chassis design

    I don't think the tyre cornering stiffness can be zero at all- it is a constant value for a given tyre and is defined as the initial slope of lateral force vs slip angle graph... It is used for analysis in linear region where Fy can be roughly represented as cornering stiffness times slip angle...
  14. WolfHR

    Meaning of the expression "positively attached"

    I would assume that it means attached in such way that the wheel is unable to move in any way relative to the shaft (rotation, sliding, &c). I'm sure I've encountered phrase "positively located" on a number of occasions, and I'd venture a guess that this phrase was meant to be synonymous... On a...
  15. WolfHR

    Multiplying a vector with the Tangent of a vector

    I think the problem is that unless set otherwise array origin is 0, and your range variable is from 1 upwards... Go to Tools > Worksheet Options and set Array Origin to 1, I think it will solve your problem. HTH
  16. WolfHR

    Gasket design question

    I hope it would be OK for a newbie in this field to ask for help and advice here. I'm facing a problem that I have no experience with- but hopefully will not come across as trying to get others to solve my problem: I'm trying to figure out how to approach my problem correctly, have tried to come...
  17. WolfHR

    wierd question.. need help creating virbation resistant stand for a "whole body" vibration

    Nice point about frequencies, Greg- 20Hz is already in audible range (theoretically) and 5-7Hz is I believe to be avoided*... Would it be a good idea to try to add damping (rubber will have some, but I believe since it's supposed to be used in trampolines, that it will be minimal), perhaps in...
  18. WolfHR

    Camber Equations

    Alpine123, in the case that Greg has brought up you could reduce the problem to 2D analysis in which case it would be rather simple matter to solve. As far as 3D analysis goes, it will get rather complex, and I've managed to make a model set up just about right, so that it required only few...
  19. WolfHR

    Copy and paste catia files

    Would a good way to solve this type of problem be to open original file, go to save management, use 'save as' on topmost assembly (using different folder) and use 'propagate directory' before saving the whole lot? I think the documents associated with this assembly will be saved to the same...
  20. WolfHR

    Why not have 2-stroke Diesel with exhaust port intake valve?

    My initial thought was that slow-revving diesels would need awkwardly long exhausts for exhaust-tuning (to return escaped air), and moreover could prove to be a bit of problem anyway if the engine was, as is the wont with diesels, turbo- or supercharged... Not that I'm an expert in the field, so...

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