Next, I did a few Mech. (expandable heads) This was a little tougher because not all Mech. Heads are made the same. The tip was all I was trying to test but in some cases, the over center blades would contact the material while the point was still making it's way through. Over center blades proved to be a challenge. I think my speed at which I was forcing the heads through the material was a bit slow for these heads to be truly appreciated.

Here is the digital still of a Rocket Mech. This head did not open but the leading edges of the blades are very sharp so they cut through the material. The peak force moment for the tip was 4 Lbs. and for the unopened blades was 12 Lbs.

[Linked Image]

Rocket Video.

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Digital still of NAP Spitfire. The peak force moment of the tip was 3.8 Lbs. but I had to replay it over and over to catch the point where the tip came through because the main blades began contacting the material at a split second after that moment. The unopened peak force moment for the blades was rather high because the blades did not deploy so I saw a force of
34 Lbs.

[Linked Image]

Spitfire Video.

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Digital Still of the Piston Point/undertaker. This head did not open either and the peak force moment for the tip was 3.4 Lbs. and the peak force moment of the unopen blades passing through was 14 Lbs.

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Piston Point/undertaker Video.

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G5 Tekan 2.8 Lbs

[img]http://i175.photobucket.com/albums/w124/bow_project/BH%20test/tekan.jpg[/img]

Tekan Video.

[img]http://i175.photobucket.com/albums/w124/bow_project/BH%20test/th_tekanMVI_0703.jpg[/img]
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Here is the peak force moment for the tip of the Rage 3 blade at 4 Lbs. THe same for the two blade. The blades fully opened at 10 Lbs. 8 Lbs. for the 2 blade. and the whole head passed through at 12.5 Lbs. 10 Lbs for the 2 blade.

[img]http://i175.photobucket.com/albums/w124/bow_project/BH%20test/rage.jpg[/img]

Rage Video.

[img]http://i175.photobucket.com/albums/w124/bow_project/BH%20test/th_rageVI_0686.jpg[/img]