REFLECTOR: Fuel venting issue

[David Staten]

I will have to take another look at the plans, I dont recall us having 
our check valve set up in that manner.
Thanks for the feedback.

Dave

Alex Balic wrote:

>The check valve is located inside the plane and above the level of the fuel
>in the tanks (right up at the roof- it T's into the vent system, so fi the
>external vent fails, it will open and allow air into the tanks from the
>cabin- but not let fuel/fumes out into the cabin.
>
>-----Original Message-----
>From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
>Behalf Of David Staten
>Sent: Sunday, July 01, 2007 12:49 PM
>To: Velocity Aircraft Owners and Builders list
>Subject: Re: REFLECTOR: Fuel venting issue
>
>If the check valve is on the same line that is theoretically blocked by 
>ice or mud, how is it able to prevent ANYTHING? An obstructed vent is an 
>obstructed vent.
>
>Dave
>
>Brett Ferrell wrote:
>
>  
>
>>The check valve is actually there to prevent tank collapse should the 
>>vent line become blocked (by say a mud-dauber or ice accumulation).  
>>I've seen a 15,000 gallon steel tank collapse by a plugged vent, and 
>>it's not pretty...
>>
>>B
>>
>>Scott Derrick wrote:
>>
>>    
>>
>>>Hmmm... 
>>>
>>>{snip}
>>>
>>>Just recently  I noticed a one way valve had been added to the single 
>>>line running out of the block to prevent flow out of the vent line and 
>>>thus only allow air to flow in.   I don't have this one way valve and 
>>>wondered why I would need it?  I guess this scenario answers my question.
>>>
>>>{snip}
>>>
>>>Scott
>>> 
>>>
>>>
>>>
>>> 
>>>
>>>      
>>>
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