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R44s grounded in Australia
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 Joined: Tue Nov 05, 2013 9:30 pm Posts: 1248 Location: UP A GUMTREE Has thanked: 1949 times Been thanked: 1688 times 
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TitaniumAutoGyro carbon composite rotor ... in extreme stress testing.... Neils brief email report...... & picture!
"Some additional test done yesterday on blades , The required flexion test was done with a safety factor of 3.25 needing a load of 40.5 KG . We then kept loading the blade to see what would happen and they took it up to over 660 Kg and still couldn’t break the blade They then did a shear load test on the root end of the blade and exceeded 2055 KG and couldn’t break the blade , this would normally be negligible in flight because everything is relying on centrifugal force not shear , but just goes to show the strength of the blade . If you had a aluminium blade you could not reach anywhere near these test figures . Regards Neil You do not have the required permissions to view the files attached to this post. _________________  |
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| Sat Feb 28, 2015 2:42 pm |
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  Joined: Thu Nov 07, 2013 12:56 am Posts: 3073 Location: VERY LOW LOW LOW EARTH ORBIT Has thanked: 3078 times Been thanked: 3854 times
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An unrealistic 'test' the whole machine would of quit flying long before the loads would get that high.
High cyclic low load test would suite it better. resonance with airframe / cyclic fatigue more of a problem not outright strength.  |
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| Sat Feb 28, 2015 4:06 pm |
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Site Admin  Joined: Tue Sep 02, 2014 7:45 am Posts: 10129 Location: Poona, Qld, OZZY Has thanked: 21874 times Been thanked: 6221 times
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You are quite correct Hillbilly, however, even tho it will be physically impossible for the rotors to be in this predicament in flight (bar in a crash) I think it is comforting to know that the rotors themselves are that tough....Knowing Neal, all of the centrifugal and other normal load testing will follow and be equally as thoroughly tested..... Neal is very methodical in his approach to everything, by the time he is prepared to release the rotors for sale, he will know every single imaginable figure as to their performance whether stationary, turning on the ground or in flight.... I think that is a good thing, as I am sure anyone purchasing (or thinking of purchasing) a Titanium will agree
    _________________ I do all of my own stunts..... most of them are even planned! Ok, Ok.... some of them are planned.. If electricity comes from ELECTRONS, then surely morality comes from MORONS?? |
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| Sun Mar 01, 2015 6:07 am |
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Joined: Tue Nov 05, 2013 9:30 pm Posts: 1248 Location: UP A GUMTREE Has thanked: 1949 times Been thanked: 1688 times
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SHEESH!!!!
 ...... for you detail-challenged readers ....  . READ AGAIN ..... FIRST LINE of Neil's email...... . Some additional test done yesterday on blades , Knowing how detail-orientated a guy is Neil & those blade guys ( manf for helo rotors) ..... those other tests were LONG done!!!!!   _________________ |
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| Sun Mar 01, 2015 10:14 am |
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Joined: Thu Nov 07, 2013 12:56 am Posts: 3073 Location: VERY LOW LOW LOW EARTH ORBIT Has thanked: 3078 times Been thanked: 3854 times
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Tested to what standards?
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| Sun Mar 01, 2015 1:44 pm |
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