Carton 100mm f/13 "MD" OTA Construction - ProtoStar Flocking w/ Mylar Backing Cut to Size

 

ProtoStar backed in Mylar cut to the final dimensions to fit the tube perfectly. (Click to see an enlarged image.)

 

Using the simple formula shown in the photo above, I determined the proper size dimensions to cut the Mylar backed ProtoStar flocking material. To find the interior circumference of the main tube, I took the 4" inch outside diameter and subtracted the wall thickness time two and reached a sum of 3.834" or 97.38mm. Then I multiplied these results times phi (3.14), which gave me 12.04" or 305.7mm, respectively for the circumference value. This will fit the tube perfectly with the ends of the flocking material butting together seamlessly. Now let's prep it for receiving the baffle rack.