Testing/Results
March, 2008
September 23, 2007
CCH conducted a drop test of Blue alien (3/8). This test used 186 lb drop weight with a 216 lb. counter weight and generated a force of 1,714 lbs. After the test, blue alien was undamaged except for indentations on the cam lobes and possible slight bending of axle and still operated OK.
Please follow this link to view the video of Drop # 7
September 9, 2007
CCH conducted a drop test of Yellow alien (3/4). This test used 186 lb drop weight with a 216 lb. counter weight and generated a force of 1,609 lbs. After the test yellow alien was undamaged except for indentations on the cam lobes and still operated OK.
Please follow this link to view the video of Drop # 6
August 3, 2007
Drop Test Results
CCH conducted another drop test today on the same cable assembly that was used in the previous 4 drops.
Drop # 5 used 188 lb. drop weight with a 216 lb. counter weight and generated a force of 6.92587 kN (1,557 lbs.)
Please follow this link to view the video of Drop # 5
July 30, 2007
Drop Test Results
CCH conducted it's first drop tests on a 5/32" cable assembly this weekend with their new Drop Test Tower.
Of the 4 drops (all with the same cable assembly),
Drop # 3 used a 143 lb drop weight with a 180 lb. counter weight and generated a force of 6.17857 kN (1,389 lbs.)
Drop # 4 used a 153 lb drop weight with a 180 lb. counter weight and generated a force of 6.35205 kN (1,428 lbs.)
Please follow these links to view the video of Drop # 3 and Drop # 4
Note: Cable assemblies used for these tests are randomly picked from production.
July 19, 2007
Lab Results
Note: Test 1 was done using 2 strands of 5mm cord, fracturing the cord at 2000 lbs.
Tests 2-12 where done with the cable being twisted at approximately a 45 degree angle by the Spectra Runner.
Test 13 was done as a straight pull with the cam in a fixture, the failure was at a knot in the Spectra ( 2,750 lbs), the Alien was still holding.
Lab results from Colorado Metallurgical Services.
Please follow these links to view Photos, and Video of the testing.
Cable assemblies (5/32" cable) destructively tested from production, in a straight pull are averaging 2,800 lbs. before fracturing.
May 24, 2007
Certificate of Calibration for Omega Strain Gage
May 18, 2007
Please click thumbnail
May 17, 2007
During the past year we have proof tested thousands of Aliens for customers to the 1750 lb point with no failures. We have also tested many cams to the
breaking point from new production. Here are some recent figures.
3/4 placed at 50% cam closure, 2810 lbs, cable breakage
Green at 50%, 2659 lbs,overcammed
Green at 40%: 2520 lbs, overcammed;
Blue at 80%, 2500 lbs, overcammed/axle bent
Blue at 50% :1838 lbs, overcammed.
Blue at 80% cam closure, 2368 lbs., and still holding. 5/18/2007
We will continue to post test results on this page
Since January 2006 every main cable is tensile tested using an Omega electronic strain gauge to measure the load. The .33 through 1" main cables are tested to 1750 lbs and the 1.25 through 2.5 are tested to 2400 lbs. After testing they are stamped on the cable eye to indicate the test was made. Ultimate strength of a 3/4 Alien is over 2700 lbs.
Testing
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