http://www.broadheadtests.com/NEWHEADS.html

Thanks 5-shot

I like the look of those Shuttle broadheads. I can see where they get the name.

They do look like the space shuttle don't they

Chris,

Thanks for the link. I must admit that the blade design had me taking a second look but I thought they trully were going to fly terribly. When I saw the "5" score for accuracy I have to say that I was shocked. Interesting results.

Frank I am with you, I thought they would fly well, but didn't think they would penetrate worth a darn, I guess we were both wrong, LOL

Chris, not to criticize but I got a question concerning the rating system for the cutting diameter.

I noticed when looking at different heads that some heads rate higher than others but actually cut less.

Such as a four blade 1 inch diameter Muzzy rates less than a three blade 1 3/16 Muzzy. While the three blade head does have a larger cutting diameter the four blade head actually has more cutting surface and does more cutting/ damage. Shouldn't the four blade head rate higher than the three blade head?

Another one would be the gator xp with a two blade two inch cut versus a jackhammer with its three blade 1 3/4 inch cut. The jack hammer has signifigantly more cutting surface but scores less in this category also.

Just something I noticed. Keep up the great work.

Bigbulls you have a point, but in the overall rating system I give a point to each blade a head has, and most of the time that evens the playing field. there are a few heads that slip through the cracks, I will admit, I am the first to admit the "system" is no where near perfect. I am considering looking into revising the scoring over this winter, but I need to play around with some ideas first, and see what if any heads change and so on. Your question is one that has come up before, along with bleeder blade sizes.

I hope you guys don't mind my coming into the conversation. My son is the inventor of the Shuttle T Lock and the President of Tightpoint. There is a very good reason for the shape of the broadhead. My uncle, Dr H T Sumsion was one of the scientists who was involved in the design of the space shuttle. A search on his name will explain some of the work he did for NASA at Ames Space Research Center. He encouraged my son to use that shape in developing a new broadhead for archers. The unique shape of the blades is the reason for the flight characteristics. The lazy S shape is called an Ogee wing. It creates a vortex at each end of the blade whichcreates extremely stable flight characteristics at slower speeds. The shape would not have been possible without the knowledge my son had in creating complicated molds and then the knowhow in molding with high strength stainless steel powder. He has a degree in mechanical engineering from Cal Poly and his molding experience came from many years in advanced telecom design.Hope this bit of info is of interest to you. I watched the development of this idea over sometime. My son is very much a perfectionist and an avid archer. His brother, my youngest son, who is also an engineer, both spent a lot of time on this product. A couple of years of testing and field performance have proven the Shuttle T Lock on big game animals to be a very lethal projectile.
Jim

Very cool. Ask your son to post here if he has some time. I am sure that he could contribute to the conversation with technical expertise that many of us do not have. Thanks for the info.