----- Original Message -----

From: Finn Lassen

To: Rotary motors in aircraft

Sent: Tuesday, July 06, 2004 7:26 AM

Subject: [FlyRotary] Re: Into the blue again :-)

Hmmm.... Doesn't the Blue Mountain and other glass panels use harddrives?
I thought that the inside of a harddrive was sealed.
Picking a random drive on Seagate's website:

Environmental
Operating Temperature (°C) 0 to 60
Nonoperating Temperature (°C) 70 to -40
Operating Shock (Gs) @ 2 msec 63
Non Operating Shock (Gs) @ 2 msec 350
Acoustics,Idle (Bels-typ sound power) 2.2

No mention of ambient pressure.

Finn

Ed Anderson wrote:

Boy, now here is an example of what kind of information we have access to on
this list.  Now that Ernest mentions it, yeah, I recall that the heads of
the hard disk float on a cushion of air - but, I would never have thought to
associate altitude with hard drive crashes!  Thanks Ernest.

Ed


Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message ----- 
From: "Ernest Christley" <echristley@nc.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, July 04, 2004 5:48 PM
Subject: [FlyRotary] Re: Into the blue again :-)


  

Haywire wrote:
    

Message    Today we flew for 6.3 hrs and everything was great again. We
calibrated a few items including the electronic governor for the IVO
      

prop.
  

What a difference that makes. Also calibrated the PSS AOA and the Dynon
      

AOA
  

and they each are phenomenal tools. The engine is running great with no
major issues at all. I do have a little tweaking to do on the low MAP
      

table,
  

but nothing urgent. Then only problem that I had today was that my Sony
      

Vaio
  

laptop doesn't seem to like high altitude. I have a small Vaio and have
built a place for it to mount easily and use it to display Jeppenson's
FlightMap in-flight GPS program. It works great until 10,300' where it
      

would
  

then display the blue screen and then reboot. After the 4th time it
      

refused
  

to reboot again so now I'm forced to use the system recovery disc and
      

wipe
  

the disc clean. I hate to think about all the files that I said I would
back-up soon... :-(. My old laptop still works fine(using it now) so
      

maybe
  

I'll try it tomorrow.
      

All hard drives have a spinning platter with a read/write head riding a
cushion of air just above it.  Go to 10,300' and there isn't much of a
cushion left.  The head will fall into the platter turning at 7500 or
10000 rpm.  I think you'll be lucky if the drive ever works again.

-- 
http://www.ernest.isa-geek.org/
"Ignorance is mankinds normal state,
   alleviated by information and experience."
                                   Veeduber

    

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