[NSRCA-discussion] SODA BOTTLE FUEL TANK

[BUDDYonRC at aol.com]

In a message dated 2/16/2006 5:01:20 PM Central Standard Time,  
perkinsrx at centurytel.net writes:

 
I’ve not made any smart comments  in a while  SO here goes. 
<That's almost a pound of fuel  the airplane must be a light weight.> 
That’d be closer to a pound and a  half. Last time I looked a pound was 16oz 
(454Gm).  SOOO that 33oz bottle  that is now 24ozs (full) would be more like a 
pound and a half, down from the  original 2.06pounds it started life as. Of 
Course if we’re gonna get that  serious we’d hafta talk about the specific 
gravity of the fuel – so I’m kinda  out on a limb with this  
But since most of us do take off  with a full tank (except those electron 
guys) Can you feel the difference in a  2m plane changing weight well over a 
pound, even if it’s located on the CofG.  At my level of experience, especially 
since I’ve not touched the sticks since  Hurricane Rita, I’m not gonna voice an 
opinion. You guys tell  me. 
Eddie 
 
  
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From:  nsrca-discussion-bounces at lists.nsrca.org  
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of  jivey61 at bellsouth.net
Sent: Thursday, February 16, 2006 4:11  PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] SODA  BOTTLE FUEL TANK
 
Buddy
 
Ya don't weigh  it with full tank,besides that the 160DZ has gobs of power
 

 
Jim  Ivey

 
----- Original  Message ----- 
 
From: _BUDDYonRC at aol.com_ (mailto:BUDDYonRC at aol.com)   
 
To: _nsrca-discussion at lists.nsrca.org_ 
(mailto:nsrca-discussion at lists.nsrca.org)   
 
Sent: Thursday,  February 16, 2006 9:54 AM
 
Subject: Re:  [NSRCA-discussion] SODA BOTTLE FUEL TANK
 

 
 
In a message  dated 2/15/2006 8:35:48 PM Central Standard Time, 
_jivey61 at bellsouth.net_ (mailto:jivey61 at bellsouth.net)   writes:

 
Wayne
 
I was  getting ready to update my experiment with the 33 oz coke bottle 
filled  with fuel 30%. I let it sit and shrink for 2 months,then when it appeared  
to stop shrinking I removed the fuel and carefully measured the volume.The  
bottle started life as 33 oz,1 liter and now holds 24 oz liquid.  Which is 
perfect for a thirsty 160 DZ with a 4 blade prop.I have it in my  Smaragd and will 
fly (test) tomorrow. Should work fine and no more  shrinking.
 

 
Jim  Ivey

 
----- Original  Message ----- 
 
From: _Wayne Galligan_ (mailto:wgalligan at goodsonacura.com)   
 
To: _NSRCA Mailing List_ (mailto:nsrca-discussion at lists.nsrca.org)   
 
Sent: Wednesday,  February 15, 2006 6:21 PM
 
Subject:  [NSRCA-discussion] SODA BOTTLE FUEL  TANK
 

 
FYI...    I had a conversation with a flying friend the other day about  the
soda bottle fuel tanks and the way they shrink.  He happens  to work for
Pepsi and explained to me that the bottles are blow  molded.  He said if they
are not used with in a certain period  of time that the memory in the plastic
takes over and they will  shrink in size and then they have to discard the
old bottles.   The carbonized soda keeps the shape of the bottle till used.
He said  that most likely the nitro content speeds up the process and  could
explain why some of you using them with higher then 15% nitro  are
experiencing this phenomenon.
So.... drink another one....  rinse and fill.

Wayne Galligan
  
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Wow  Jim
 
That's almost a  pound of fuel the airplane must be a light  weight.
 
Buddy
  
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Eddie 
Correct specific gravity of fuel varies with the gravity of it's contents,  
more nitro more weight the average is about .65 to .75 which makes 24 oz be  
around one pound.
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