As I was putting together a google spreadsheet to calculate fabric lengths, radial baffle spacing for longitudinal baffles and down fill volume for a DIY underquilt, I thought, why not share it with HF? Thus, I present:
DIY Underquilt Calculations
The radial baffles are calculated using MAD777's method of calculation discussed in another thread, using 170 degrees to approximate the arc of the UQ as it wraps under the hammock.
Anyone with the link can view - and yes, modify the spreadsheet. This will allow you to plug your own values into the cells that do not have a yellow background (yellow cells are calculated by the sheet). While this means that someone could go in and change the formulas, I'm hoping that won't happen (unless it is to correct or improve them.) Google spreadsheets won't allow you to protect only a part of a sheet (i.e. to protect the calculations), so we'll see how this goes. I have a back up.
While I'm a software engineer, my math gene is a bit stunted so I implore the uber-math geeks (I can say geek because I is one) on this forum to please check my math!
Hopefully you will find this useful. And hopefully it is correct (or will be corrected!)