quicksilver, there is one easy way to determine if it is tubulent or not... do the calculation. My guess is that it would be after just a few inches down the arrow shaft, but I do not know for sure and I have not done any calculating. Let me know how it comes out. I am interestedin this one.

As far as cost goes, I don't know what it would cost I just threw a number out there.The problems with using Teflon have already been brought up. It will not last on the arrow and so in short order it becomes a regular carfbon arrow. Either way, it would be expensive and it would take a ton of upfront capital and years of manufacturing to develop your economies of scale. Even after which, it would still be a major production cost increase over normal carbon arrows. I will say that for sure I would not pay even an extra 15% per arrow just do it pulls out of the target easier.