X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from vms044pub.verizon.net ([206.46.252.44] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1301252 for flyrotary@lancaironline.net; Sat, 05 Aug 2006 02:25:36 -0400 Received: from [63.24.100.45] by vms044.mailsrvcs.net (Sun Java System Messaging Server 6.2-4.02 (built Sep 9 2005)) with ESMTPA id <0J3I00K6KHTVL83B@vms044.mailsrvcs.net> for flyrotary@lancaironline.net; Sat, 05 Aug 2006 01:25:12 -0500 (CDT) Date: Fri, 04 Aug 2006 23:23:37 -0700 From: Ken Welter Subject: Re: [FlyRotary] NO2 Bottle Explosion In-reply-to: To: "Rotary motors in aircraft" Message-id: MIME-version: 1.0 Content-type: multipart/alternative; boundary="============_-1057363386==_ma============" References: --============_-1057363386==_ma============ Content-Type: text/plain; charset="us-ascii" ; format="flowed" Being I have been around NOS for so many years I bet I know what Happened. NOS has a big expansion and contraction rate with heat and if you fill a tank to capacity and it heats up to much it will blow the blow off disk, NOS bottles are rated for 1800 lbs and they have a 3000 lb safety disk in them and if you have a good tank with a current hydro the disk will blow before the tank blows. I would bet that some punk kid got tired of the disks blowing out on him and installed a higher pressure disk like a 4200 psi disk from a 3000 lb tank. I transfer fill my own tanks and during hot weather I only put 8 lbs in a 10 lb tank to give more expansion aria for a safety margin. Ken >Hi Bill, > >Yes, I realize that being only an oxidizer that without fuel, you >would not have a combustion type explosion. But as the photo of the >guy's car shows - even the overheated bottle by itself made an >impressive amount of shredded metal out of his car. Like you point >out - a burst water heater can do an unbelievable amount of damage. > >But, I hate to think of what it would have been like had fuel been >available when the bottle burst. > >Since the bottle shows no sign of scorching, fairly clear no >combustion took place. > > Here's the link if you want to look at more photos >http://www.healthyhome.net/NOS2.htm > >One thing having this happen to back-end of parked car, another >thing to think of it in my airplane. > >Not trying to imply NO2 is not safe handled properly - Its just >I just don't need THAT kind of boost {:>). > > >Ed > >Ed Anderson >Rv-6A N494BW Rotary Powered >Matthews, NC >eanderson@carolina.rr.com >http >Ed Anderson >Rv-6A N494BW Rotary Powered >Matthews, NC >eanderson@carolina.rr.com >http://members.cox.net/rogersda/rotary/configs.htm#N494BW > > --============_-1057363386==_ma============ Content-Type: text/html; charset="us-ascii" Re: [FlyRotary] NO2 Bottle Explosion
   Being I have been around NOS for so many years I bet I know what Happened.
  NOS has a big expansion and contraction rate with heat and if you fill a tank to capacity and it heats up to much it will blow the blow off disk, NOS bottles are rated for 1800 lbs and they have a 3000 lb safety disk in them and if you have a good tank with a current hydro the disk will blow before the tank blows.
  I would bet that some punk kid got tired of the disks blowing out on him and installed a higher pressure disk like a 4200 psi disk from a 3000 lb tank.
  I transfer fill my own tanks and during hot weather I only put 8 lbs in a 10 lb tank to give more expansion aria for a safety margin.
  Ken




Hi Bill,
 
Yes, I realize that being only an oxidizer that without fuel, you would not have a combustion type explosion.  But as the photo of the guy's car shows - even the overheated bottle by itself made an impressive amount of shredded metal out of his car.  Like you point out - a burst water heater can do an unbelievable amount of damage. 
 
But,  I hate to think of what it would have been like had fuel been available when the bottle burst.
 
Since the bottle shows no sign of scorching, fairly clear no combustion took place.
 
  Here's the link if you want to look at more photos  http://www.healthyhome.net/NOS2.htm
 
One thing having this happen to back-end of parked car, another thing to think of it in my airplane.
 
Not trying to  imply NO2 is not safe handled properly - Its just I just don't need THAT kind of boost {:>).
 
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://members.cox.net/rogersda/rotary/configs.htm#N494BW


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