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  #11  
Old 08-22-2013, 10:05 AM
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Kahuna Kahuna is offline
 
Join Date: Dec 2004
Location: Gold Hill, NC25
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Quote:
Originally Posted by rv7boy View Post
Mike, where is the link to the description and ordering information for the inertia activated shutoff switch? I don't see it on the above page or on the linked pages.
We used this one.
https://www.pegasusautoracing.com/pr...s.asp?RecID=87
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  #12  
Old 08-22-2013, 10:13 AM
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Mike S Mike S is offline
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Quote:
Originally Posted by AndyRV7 View Post
One question. Does 100LL ignite by hot metal?
Yes, if the metal is hot enough.

http://www.skybrary.aero/index.php/Ignition_of_Fuels
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Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

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  #13  
Old 08-22-2013, 10:34 AM
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flyboy1963 flyboy1963 is offline
 
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Default fuel cell foam?

the Pegasus auto racing site also shows a yellow fuel cell foam that can be cut to any size and fit to fuel tanks.....albeit during construction for our tanks.

As I understand it dampens shock wave formation that causes tanks to explode, and slows leakage, and reduces combustible air/fuel vapour mixtures inside the tank. $54 for an 8x8x8" cube, E85 resistant.
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  #14  
Old 08-22-2013, 10:54 AM
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fl-mike fl-mike is offline
 
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Aim for water?
Uh-oh, here we go again....
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Venice, FL
RV-6A. Mattituck TMX O-360, FP, GRT Sport EFIS, L3 Lynx NGT-9000
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  #15  
Old 08-22-2013, 11:10 AM
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AndyRV7 AndyRV7 is offline
 
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Quote:
Originally Posted by Mike S View Post
Interesting. Thanks.
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  #16  
Old 08-22-2013, 11:23 AM
skelrad skelrad is offline
 
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Location: Issaquah, WA
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Quote:
Originally Posted by flyboy1963 View Post
the Pegasus auto racing site also shows a yellow fuel cell foam that can be cut to any size and fit to fuel tanks.....albeit during construction for our tanks.

As I understand it dampens shock wave formation that causes tanks to explode, and slows leakage, and reduces combustible air/fuel vapour mixtures inside the tank. $54 for an 8x8x8" cube, E85 resistant.
The problem with this stuff is it breaks down over time. Pegasus recommends changing it every 3 years because of the fact that it'll start clogging pumps and filters.
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  #17  
Old 08-22-2013, 12:33 PM
CATPart CATPart is offline
 
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I have witnessed a decathalon that nosed over on landing with full tanks. The fuel simply leaked from the caps and vents and made a nice stream entering the cowl. There was no fire. Shutting off fuel would have had no effect in this situation. I know it is a high wing, but I think a similar outflow of fuel could happen in an RV sitting on its nose. Depending on how high the tail is, the fuel might reach a hot exhaust part. Just speculating, maybe somebody has seen an RV on its nose and can comment.
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  #18  
Old 08-22-2013, 03:20 PM
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Steve Melton Steve Melton is offline
 
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Location: Cincinnati, OH
Posts: 2,791
Default auto ignition temp of avgas 824?F / 440?C

ConocoPhillips
001769 - Aviation Gasoline, 100 LL
Date of Issue: 23-May-2007
Vapor Pressure: 5.5-7.0 psia (Reid VP) @ 100?F
Vapor Density (air=1): >1
Boiling Point/Range: 75-338?F / 24-170?C
Melting/Freezing Point: <-72?F / <-58?C
Partition Coefficient (n-octanol/water) (Kow): No data
Specific Gravity: 0.68-0.74 @ 60?F (15.6?C)
Bulk Density: 5.83 lbs/gal
Percent Volatile: 100%
Evaporation Rate (nBuAc=1): >1
Flash Point: <-35?F / <-37?C
Test Method: (estimate)
LEL (vol % in air): 1.5
UEL (vol % in air): 7.6
Autoignition Temperature: 824?F / 440?C

Stability: Stable under normal ambient and anticipated storage and handling conditions of temperature and pressure. Extremely
flammable liquid and vapor. Vapor can cause flash fire.
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  #19  
Old 08-22-2013, 08:55 PM
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hgerhardt hgerhardt is offline
 
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These inertia switches were used on all Ford vehicles with EFI throughout the 90's up to at least mid 2000's: http://www.sensata.com/download/resettable-crash.pdf I even installed one in my injected '66 GTO. Install it near your main solenoid/contactor in series with your existing main bus switch wiring.

Heinrich
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  #20  
Old 08-22-2013, 11:45 PM
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erikpmort erikpmort is offline
 
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Location: logan, utah
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Remember me I landed in the soccer field ? I hit that park sign going 60+mph and it sliced right into the fuel tank. Still waiting for the fuel tank to be repaired btw. But I was happy that no fire occurred. I did not get the fuel off before the landing admittedly.
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