Re: Wooden Drivers are just as long as metal ones!Really, the answer is staring you right in the face here.
You committed a fallacy in your assessment, the fallacy of affirming the consequent, and also made a hasty generalization.
Lets look for a second at this one:
This particular persimmon driver is as long than this particular metal one.
Therefore, all persimmon drivers hit it as long as metal ones.
The fallacy is more clear if I use some other examples first.
- Affirming the consequent
- Hasty generalization
OK, so here's what happened. You compared two different clubs with different shafts, lengths, heads, lofts, and weights, and made a broad statement based on that. The reason you hit the new club farther is more likely multi-fold.
First, it had more loft. It could be your current 10° driver has too little loft. Also, the Cobra undoubtedly has a much longer shaft than the persimmon wood, so you likely hit the persimmon wood squarely more often. This will give you more distance. Persimmon 2 woods run about 43", where as modern drivers are around 46". Those 3 inches make a huge difference. As do 2° of loft.
In truth though, the actual science is quite well founded. Persimmon has a COR of roughly .79, while modern metal drivers have a COR of .83. However, some persimmon woods may have more COR, perhaps even more than .83, because no two pieces of wood are the same. So, what you've found is that your driver is not the longest one out there for you, but that's about all.