Center of Gravity - Page 3

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by patrishap on 18 December 2004 - 07:12

Hi Howdedo, Past forgotten? I've gone back to your first original statement and tried to devine exact meaning in context of ecs's original information. I think I get your meaning, but not absolutely sure - you may have to elucidate more later. I'm afraid relevance to boat design is rather minimal. There you'd be concerned with centre of buoyancy, centre of lateral resistance, pounds per inch immersion, and centre of flotation of waterplane area. Impressed? No, jokes aside, a boat trims about latter centre, not the centre of gravity: for a symmetrical rectangular box, the two centres would, of course, coincide! As I understand it, you're saying that as animal's centre of gravity is forced up and down with constantly changing slope of topline - when animal is in full stride that is - then small part of drive and energy produced is lost to effect this change. And, ideally, centre should stay in same horizontal plane, Please tell me if I'm barking up wrong tree though! I don't think it would matter much because under Front Assembly, ecs located C. of G. well forward.(A bit too far forward for my peace of mind, but still). In other words, the up and down movement of rear would have far less affect than if this centre were located there as well, or at middle of beast - looking at topline as a lever with fulcrum near withers. Make any sense? Cheers.

by HOWDEDO on 18 December 2004 - 08:12

Patrishap, The relevence to boat design is limited, and i did mention that there are other factors. All I meant is the effect of CoG coinciding with CoB for stability. Slope has 2 aspects in this analysis 1. The structural slope (topline) 2. changing slope due to drive from hind looking at topline as a lever is correct, but CoG at center of animal won't help due to the inherent slope of the animal's structure. It should be more forward and I tend to agree with ecs' location of CoG. I am now worried whether this discussion should be continued in this fashion. The language is too technical, which I suspect, is why other folks are not joining in. My own ability to explain it otherwise is terribly limited. Past is not completely forgotten, but life goes on. For the purpose of level setting - I don't make comments based solely on analytics. I have owned, and continue to own some decent dogs , and with varying degrees of interest , I have been involved with GSDs for about 12 years (not counting the pets I had as a kid). My serious limitation is that I don't breed . No hard feelings at all - everyone is entitled to their opinion and I am always keen to learn.

by patrishap on 18 December 2004 - 09:12

Howdedo, have another peak at what I said - I'm not advocating any particular position for C of G at all (assuming this were possible!) I'm simply saying that if we accept ecs' location as the correct one - ie well forward - and we look at topline as a lever, than up and down movement of lever's free end (animal's hind end) will have only limited effect on up and down movement of centre of gravity - this being located near the fulcrum - ie near whithers. I was more concerned with comprehending your original comment. Cheers.





 


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