[NSRCA-discussion] YS-160 round 1...ding, ding

Sun Jun 1 15:11:22 AKDT 2008

Oh, no, instead of JB Weld, I mig welded mine, is that OK?

-----Original Message-----
>From: JShulman <jshulman at cfl.rr.com>
>Sent: Jun 1, 2008 6:41 PM
>To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
>Subject: Re: [NSRCA-discussion] YS-160 round 1...ding, ding
>
>Thanks Troy. Noticed that there is no fuel line keeper, so gotta order one of those. Motor still runs great with lots of power. The
>richer low end solved the higher issue instantly too, thanks again! I'm hoping that it only moves cause of the lack of the keeper,
>so we'll get that on and go from there. Worst case is eventually we'll plug the line right into the head.
>
>Regards,
>Jason
>www.jasonshulman.com
>www.shulmanaviation.com
>www.composite-arf.com
>
>-----Original Message-----
>From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Troy Newman
>Sent: Sunday, June 01, 2008 11:32 AM
>To: General pattern discussion
>Subject: Re: [NSRCA-discussion] YS-160 round 1...ding, ding
>
>
>Jason,
>
>Regardless of the peanut galleries comments here is the skinny.
>
>There are two parts...the black plastic check valve....and then the
>Brass Injector that goes into the head. The black plastic part can get
>loose, IF the injector fuel line is allowed to flop around. This is why
>it has a clip on it. Some folks will remove the clip and the fuel tubing
>is allowed to flop. Also some folks seem to thing they can remove the
>black plastic check valve and re-install it. Nope the Plastic goes on
>one time and to remove it the plastic breaks out and the hole is not
>larger from the barb damage.
>
>The idea is to not mess with it.
>
>
>There have been a  few cases of mostly early 160's and mostly a couple
>years ago when the brass nozzle came out of the head. I know of 3 of
>these and one was in Japan, one in Australia and one in the USA.
>Extremely rare, but clean it up and yes I have been told JB weld will
>fix it. My understanding is that this nozzle is pressed in with some
>kind of adhesive at the factory. So the JB weld is the same kind of
>thing....You don't have that problem.
>
>If the engine is allowed to hit the cowl of the model sometime the black
>plastic check valve will get knocked around....If it gets loose, just
>remove it and hook the fuel tubing direct to the injector nozzle. It
>will work fine. The check valve is there for long extended idles, and
>quick throttle ups.....Think F-07 Double Avalanche. The check valve
>prevents a burp on throttle up.
>
>
>If you engine is set properly you won't get the burp anyway...but if its
>just a  touch lean on the pump...then a tiny air bubble can migrate back
>into the injector fuel line. This is because the valve cover is the air
>box...and is under pressure...so the high pressure keeps the fuel from
>coming out of the injector until the valve on the engine opens. When the
>valve opens the pump gives a squirt and the fuel comes out.....
>
>At idle the engine is not using much fuel at all....and the injector
>will leak a little fuel into the valve cover area....If the engine is
>too rich (pump)...this is what causes it to get a rough idle. If the
>pump is too lean then there is not enough fuel in the line and the
>pressure in the line is lower so the air box pressure pushes the fuel
>back in the injector line and right at the very end of the in injector
>line forms a little air bubble.
>
>
>The black plastic check valve prevents this from happening.
>
>
>So the long story aside if its flopping around pry it off with a large
>flat blade screw driver, just slowly inch it off...then hook the fuel
>line direct. It will work fine.
>
>By the way the new 170's have a different clip on the injector line that
>keeps the fuel tubing from flopping around. This keeps the black plastic
>from turning and getting loose on the injector nozzle.
>
>
>The peanut gallery can now continue their comments.
>
>Thanks
>Troy Newman
>
>-----Original Message-----
>From: nsrca-discussion-bounces at lists.nsrca.org
>[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of JShulman
>Sent: Sunday, June 01, 2008 8:06 AM
>To: General pattern discussion
>Subject: Re: [NSRCA-discussion] YS-160 round 1...ding, ding
>
>Oh yea... the check valve. Regs in front... duh. Where do I plug in the
>battery???
>
>I'll check it and make sure I'm just seeing things. We're still learning
>about the new YS's. Maybe it always swiveled and I just now noticed it.
>
>Regards,
>Jason
>www.jasonshulman.com
>www.shulmanaviation.com
>www.composite-arf.com
>
>-----Original Message-----
>From: nsrca-discussion-bounces at lists.nsrca.org
>[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Mike
>Hester
>Sent: Sunday, June 01, 2008 10:35 AM
>To: General pattern discussion
>Subject: Re: [NSRCA-discussion] YS-160 round 1...ding, ding
>
>
>You mean the check valve? It is press fit. It swivels =)
>
>As long as it's not loose, it's fine. Sometimes the fitting comes loose
>from the head where it's just pressed in. If that's the case, JB weld.
>But the black part just presses on to that.
>
>if you mean the part that attaches on to the pushrod tubes, it's just
>plastic and if it's moving excessively, something might have broken.
>
>-Mike
>
>----- Original Message -----
>From: "JShulman" <jshulman at cfl.rr.com>
>To: "NSRCA" <nsrca-discussion at lists.nsrca.org>
>Sent: Sunday, June 01, 2008 10:12 AM
>Subject: [NSRCA-discussion] YS-160 round 1...ding, ding
>
>
>> Sooooooooooo.... how do we tighten up the regulator (black piece at
>> valve
>> cover) on the top of the motor? It seems that this one has come loose
>> as it will swivel back and forth.
>>
>> BTW Chris... I am still flying electric <G>
>>
>> Regards,
>> Jason
>> www.jasonshulman.com
>> www.shulmanaviation.com
>> www.composite-arf.com
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