原帖由 efun 于 2012-1-17 08:45 发表 
BPL上有一个表是800F 的1.68,850F的1.876，感觉这个不准，我也不清楚哪个数字更确切些，但是从零售渠道买的话550F和850F的绒的价格都差出来近6倍，绒之间的差距确实非常大
这里的讨论有提到2.53这个值，感兴趣的 ...
这位仁兄首先说是长期潜水第一次发帖，提出疑问后，不确定自己所说这些正确与否并证询意见。
随之而来的问题是：
他比BPL的表格更靠谱？如果这样，其它数据都是不能放在一起作比较的，因为不同来源的参考基准没有一致性。
商品价格差5至6倍，CLO值差3至4倍才感觉合理？
原文载录如下：
MET's, CLO's and BMI's? on 05/16/2011 21:08:22 MDT
Long-time lurker / first time poster. I converted several years ago to lightweight, and am now working on the ultra-lightweight evolution in preparation for an AT thru-hike after retirement.
I’m an economist by training, which means I usually round to the nearest million, so I confess that my introduction to CLO’s, METS, BMI’s and things that use those decimal thingies has me befuddled from time to time. That said I recently began making most of my own gear, including a backpack and down vests, and am starting on a sleeping bag and modified top-quilt. I would like to clarify (or correct) my understanding of several concepts before I get too deep in the weeds. After reading several years worth of postings I’m sure there are many here that could enlighten me on several points that still escape me.
1. Am I correct in assuming that the m2K/W used in CLO calculations is somehow mathematically related to the MET (W m2 * Surface area) calculations? If so, the connection (mathematical and otherwise) escapes me.
2. I’m assuming conceptually that MET relates to heat generated and m2K/W is a measure of heat NOT lost due to the insulation value of a given material. Is there a mathematical relationship that bridges the two calculations?
3. I’ve seen multiple CLO factors related to the use of fully lofted down (and I won’t go near the Deadly Down Density Discussion). I’ve been working with a 2.53 CLO/oz for 850fp, which I believe corresponds to a CLO/Inch of about 3.9. Is this correct? I’ve also seen a quote from Richard N. that fully lofted down equates to a 6.5 CLO/in. Is this part of the DDDD or something else? For general calculations am I using the right value of 3.9 CLO/inch for 850fp down?
4. Ignoring the debate over whether it’s best to just measure down warmth by loft, I have made the assumption that down CLO’s are scalable like that of synthetics. Meaning that assuming #3 above is true then 2 inches of 850 down would have a CLO of 7.80. Correct?
I appreciate all the help I can get with these questions. Hopefully I’ll get around to posting some photos of my homemade gear shortly. Thanks.
Lane DeCost
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发表于 2012-1-17 08:45