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

[Bob Lavey]

Ha!  I have never disassembled one of my engines :)  I know better than
that.

Do you mean the diaphragm in the check valve may be too stiff to move at
idle?  That's possible.  There's probably not a lot of pressure going
through that line at idle, and it may not overcome the diaphragm.

Thanks,
Bob
 

> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org 
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf 
> Of Ihncheol Park
> Sent: Wednesday, August 26, 2009 10:46 AM
> To: General pattern discussion
> Subject: Re: [NSRCA-discussion] YS110S fuel tank. Do others do this?
> 
> 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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