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Mass Balance Docs was NTSB grounding

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KE6FIS(at)arrl.net
Guest

Posted: Fri Apr 17, 2009 11:11 pm Post subject: Mass Balance Docs was NTSB grounding

 	  Quote: 	
		   From: "jetboy" <sanson.r(at)xtra.co.nz>

 

 

 take care in choosing mass balance modifications. The design rules applying to

 European 601XL is CAP482 British Civil Airworthiness Requirements section S -

 small light airplanes, section D, design and construction, S 6569

 [snip]

 I found this while reviewing the design rules documents that applied before the

 ASTM became the rule for LSA. I have not been able to freely obtain the ASTM

 spec anywhere but it may become more available now the NTSB have pointed to it.

 

 Both BCAR-S and DS 10141E (formerly TP10141E from transport Canada) design rules

 that applied to the 601XL in non LSA markets

 require flight testing for flutter, and the pre- LSA 601XL design should therefore

 have been tested in this manner, but I dont know the requirements under ASTM

 certification for LSA.

 [snip]

 Ralph


	


Ralph, thanks for the pointers to CAP482/BCAR-S and DS10141E! A quick

google search and I got both.



Unfortunately, I very much doubt we'll see a publicly-available PDF for the

ASTM specs anytime soon. There are 50 some-odd standards, each in the

~$40 range: http://www.astm.org/SNEWS/ND_2008/stesidebar_nd08.html

In my engineering career I have found the vast majority of these standards 

bodies (ASTM/ISO/IEEE,etc.) are primarily set up for $$PROFIT$$ and

providing competitive barriers to entry for anyone but the large

corporations whose employees make up most of the standards committees. 

How the design requirements for such a relatively small and publicly 

regulated sport/industry like LSA got sucked into one of these things 

I just don't know. If you ever do find a copy legally available to the

public, however, please post the link!



Bob Johnson

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JAPhillipsGA(at)aol.com
Guest

Posted: Sat Apr 18, 2009 5:17 pm Post subject: Mass Balance Docs was NTSB grounding

I think some folks here have earned a rather a  smart punch in the nose. Remember, that battery is only a misdemeanor. Have  a grand and glorious day and you folks that earned it,  enjoy. 

  

 eIn a message dated 4/18/2009 3:11:47 A.M. Eastern  Daylight Time, KE6FIS(at)arrl.net writes:

   	  Quote: 	
		  -->    Zenith-List message posted by: <KE6FIS(at)arrl.net>



 	  Quote: 	
		   From:    "jetboy" <sanson.r(at)xtra.co.nz>

 

 

 take care in    choosing mass balance modifications. The design rules applying to

    European 601XL is CAP482 British Civil Airworthiness Requirements section S    -

 small light airplanes, section D, design and construction, S    6569

 [snip]

 I found this while reviewing the design rules    documents that applied before the

 ASTM became the rule for LSA. I have    not been able to freely obtain the ASTM

 spec anywhere but it may    become more available now the NTSB have pointed to it.

 

 Both    BCAR-S and DS 10141E (formerly TP10141E from transport Canada) design    rules

 that applied to the 601XL in non LSA markets

 require    flight testing for flutter, and the pre- LSA 601XL design should    therefore

 have been tested in this manner, but I dont know the    requirements under ASTM

 certification for LSA.

 [snip]

    Ralph


	


Ralph, thanks for the pointers to CAP482/BCAR-S and DS10141E! A    quick

google search and I got both.



Unfortunately, I very much doubt    we'll see a publicly-available PDF for the

ASTM specs anytime soon. There    are 50 some-odd standards, each in the

~$40 range:    http://www.astm.org/SNEWS/ND_2008/stesidebar_nd08.html

In my engineering    career I have found the vast majority of these standards 

bodies    (ASTM/ISO/IEEE,etc.) are primarily set up for $$PROFIT$$ and

providing    competitive barriers to entry for anyone but the large

corporations whose    employees make up most of the standards committees. 

How the design    requirements for such a relatively small and publicly 

regulated    sport/industry like LSA got sucked into one of these things 

I just don't    know. If you ever do find a copy legally available to the

public, however,    please post the link!



Bob  ========================   the  ties  Day  ================================================               - MATRONICS WEB FORUMS  ================================================             - List Contribution Web Site  sp;                             ===================================================



	


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