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Date: Fri, 24 Jun 2005 10:29:33 -0500
From: Jim Sower <canarder@frontiernet.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Brake Line Incident Photos
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<... there are many RVs flying with this configuration ... break might 
be attributed to my installation... material weakness ... damage I did 
not notice, etc ...>

You might want to get on the RV list with that.  There might be LOTS of 
failures, and yours is just the most spectacular fire so far.

I think it's worth publicizing as widely as is practical ... Jim S.

Ed Anderson wrote:

> Yes, John - luck and a quick acting nephew {:>).  The only answer I 
> can come up with is that the aluminum line suffered a fatigue fracture 
> which weakened the tube and the hydraulic pressure finally blew out 
> the chunk.  The line has a loop to provide flexing as the caliper 
> moves in and out - but, flexing aluminum is not know for a long life.  
> In all fairness, there are many RVs flying with this configuration - 
> so the break might be attributed to my installation (stressing the 
> line when I put the loop in it), material weakness, some damage I did 
> not notice, etc.  Had over 300 landings before the failure.
>  
> Ed
>
>     ----- Original Message -----
>     *From:* John Slade <mailto:sladerj@bellsouth.net>
>     *To:* Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
>     *Sent:* Friday, June 24, 2005 9:09 AM
>     *Subject:* [FlyRotary] Re: Brake Line Incident Photos
>
>     Wow, Ed!
>     You're luck the airplane wasn't consumed.
>     My question - how did that big chunk get blown out of the brake line?
>     Regards,
>     John
>
>         -----Original Message-----
>         *From:* Rotary motors in aircraft
>         [mailto:flyrotary@lancaironline.net]*On Behalf Of *Ed Anderson
>         *Sent:* Friday, June 24, 2005 8:58 AM
>         *To:* Rotary motors in aircraft
>         *Subject:* [FlyRotary] Brake Line Incident Photos
>
>         For those interested (and may not have seen them) , here are a
>         few photos of my brake line fire incident.
>          
>           Big chunk got blown out of brake line as can be seen from
>         Brakelines.jpg photo.  Effect of resin burning seen on wheel
>         pant photos.  Once the line broke, the next time I depressed
>         the brake pedal, a fireball from the wheel to over the wing
>         resulted from spraying the hydraulic fluid over the hot brake
>         assembly.  The flash point of the fluid is only 240F!  I am
>         going to investigate some stuff with a bit higher flash point {:>)
>          
>          
>         Ed
>          
>         Ed Anderson
>         Rv-6A N494BW Rotary Powered
>         Matthews, NC
>         eanderson@carolina.rr.com <mailto:eanderson@carolina.rr.com>
>