[NSRCA-discussion] YS110S fuel tank. Do others do this?

[Ihncheol Park]

Bob,

The fuel tank is MK.   So far, trying two difference YS check valves (new)didn't make any differences.  Tank keeps the pressure just fine for normal runs.  During the normal run on the ground, it doesn't seem to do that.  I am not sure since I haven't run the engine on the ground for more than 3 minutes in idle.

Only thing that I can think of is that the diaphragm is a little too stiff so that it doesn't move well on idle?

However, I haven't been able to disassemble the regulator.  I can see the exploded view, but it doesn't show how it actually was assembled.

Do you know how to disassemble the regulator on S version?

Ihncheol

--- On Wed, 8/26/09, Bob Lavey <bob.lavey at cox.net> wrote:

> From: Bob Lavey <bob.lavey at cox.net>
> Subject: Re: [NSRCA-discussion] YS110S fuel tank.  Do others do this?
> To: "'General pattern discussion'" <nsrca-discussion at lists.nsrca.org>
> Date: Wednesday, August 26, 2009, 9:38 AM
> 
> 
>  
>  
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> 
>  
> Hi Ihncheol,
>  
> I have several of the new-style
> and older YS 110s, and I've 
> never seen that happen.  I almost never burn off the
> unused fuel, 
> though.  If I'm going to be putting one up for
> more than a couple of weeks, 
> I'll run it dry and add after-run, but I fly my
> main two every couple of 
> days.
>  
> Perhaps it's a difference in
> the style of tanks we're 
> using?  All of mine are using Hayes tanks, and that
> doesn't look like what 
> you have.
>  
> The other thing is that I'd
> expect the check valve to allow 
> air to come into the tank as the fuel was being sucked
> out.  Unless I'm 
> mistaken, the check valve keeps air/fuel from going out of
> the tank but not 
> in.  Perhaps there's a problem with your check
> valve?
>  
> Thanks,
> Bob
> 
> 
>   
>   
>   From:
> nsrca-discussion-bounces at lists.nsrca.org 
>   [mailto:nsrca-discussion-bounces at lists.nsrca.org] On
> Behalf Of Ihncheol 
>   Park
> Sent: Tuesday, August 25, 2009 9:23 PM
> To: 'General 
>   pattern discussion'
> Subject: [NSRCA-discussion] YS110S fuel tank. Do 
>   others do this?
> 
> 
>   
>   
>   I have a question to ask you
> guys. 
>   If you
> take a look at the 
>   attached picture.  You can see the middle of the
> fuel tank 
>   sunken. 
>   My
> 110S does this when I run 
>   the engine dry (burn off the left over fuel). 
>  
>   Yes, I
> know the YS until 
>   140Sport suck the fuel at idle, but haven't actually
> seen the fuel tank going 
>   in. 
>   
>   
>   
>   
>   Is
> this 
>   wrong? 
>   
>   
>   Just
> curious as I have never 
>   seen one doing. 
>   
>   
>   Ihncheol 
>      
> 
> -----Inline Attachment Follows-----
> 
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