[NSRCA-discussion] YS-160 setting
vicenterc at comcast.net
vicenterc at comcast.net
Fri Mar 9 05:02:19 AKST 2007
Hi Troy,
I am going to start to use two YS 160 for this season. Could you give me general recomendations how to start, break-in and adjust these engines? Probably, you have already the information in the opinion groups so just let me have the link.
With my best regards,
--
Vicente "Vince" Bortone
-------------- Original message --------------
From: "Troy A. Newman" <troy_newman at msn.com>
> 18.1-10 is good on the 160's I don't like the W version in Arizona on the
> 160.
>
> Now the wide version is the SNIZZLE on the 170 in AZ with the Adventure or
> the Astral XXc,
>
> try the W in that thick FL air. I bet it will be better than the regular
> version.
>
> I turn will turn the 18.1-10 about 8400 on the 160 and this is loud, will
> not make noise. But We have been playing with the props and some
> re-discovered, old techniques and I can get to run really quiet at about
> 8100 and it makes noise easily and has way more punch than anything else I
> have seen or flown.
>
> The issue now is not power. The issue is grunt and pulling the model through
> tough things like the "S" without needing high speed and yet digs the model
> out of the hole on upline snaps and through windy conditions on the backs of
> turnarounds downwind and so on. The time where you need the energy, yet the
> model is not going to be acerbating up to Mach 2.
>
> Troy
> ----- Original Message -----
> From: "JShulman"
> To: "NSRCA Mailing List"
> Sent: Thursday, March 08, 2007 9:14 PM
> Subject: Re: [NSRCA-discussion] YS-160 setting
>
>
> > What prop? And that's in that thin, dry air.
> >
> > 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 A.
> > Newman
> > Sent: Thursday, March 08, 2007 10:57 PM
> > To: NSRCA Mailing List
> > Subject: Re: [NSRCA-discussion] YS-160 setting
> >
> >
> > By the way on my Astral XXc I'm getting 14-15 mins out of a 20oz tank. I
> > can
> > fly a complete P and Complete F. If I try 2 P's I get to the loops and it
> > gets an air bubble....
> >
> > Troy
> > ----- Original Message -----
> > From: "JShulman"
> > To: "NSRCA Mailing List"
> > Sent: Thursday, March 08, 2007 8:44 PM
> > Subject: Re: [NSRCA-discussion] YS-160 setting
> >
> >
> >> Thanks Troy for my answer. Hope everyone out there got what they needed
> >> out
> >> of that detailed part before the answer ;) I'll report back tomorrow. or
> >> have to replace the motor...lol.
> >>
> >> 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 A.
> >> Newman
> >> Sent: Thursday, March 08, 2007 10:34 PM
> >> To: NSRCA Mailing List
> >> Subject: Re: [NSRCA-discussion] YS-160 setting
> >>
> >>
> >> Jas,
> >>
> >> lean the pump a little bit about 1/4 turn and see if the motor starts to
> >> go
> >> lean in the transition.
> >> The way this engine works is the pump pushes the same amount of fuel all
> >> the
> >> time. Every stroke it pushes the same volume of fuel. If the engine is at
> >> idle and not using the fuel then pressure builds up in the injector line
> >> until it gets to that magic pressure where the pump pressure screw allows
> >> it
> >> to bypass back to inlet of the pump. So everything the engine doesn't
> >> need
> >> gets pushed back around to the inlet of the pump for the next gulp.
> >>
> >> If you are at idle, and the pressure control on the pump is too tight
> >> meaning not allowing enough to loop back around it will got in and get
> >> burnt
> >> and come out as lots of smoke at idle. Yet when you are at full power or
> >> at
> >> least upper end power the HS needle is set and the mixture is correct.
> >> So
> >> what is happening is you have too much going to the engine and not enough
> >> bypassing around.
> >>
> >> Lean the pump...CCW. If you get to lean on the pump is will start to
> >> detonate on throttle up or will sit and surge at idle. To be honest the
> >> pump
> >> setting are actually pretty broad and the engine will run correctly with
> >> many different setting. The key is the pump always moves the same amount
> >> of
> >> fuel. You are not adjusting pump pressure, you are adjusting the pop off
> >> pressure. Meaning the pressure which the little diaphragm will allow fuel
> >> to
> >> loop back to inlet. So adjusting the pump richer means more pressure on
> >> the
> >> spring and diaphragm so the pressure it takes to allow bypass is higher
> >> and
> >> as result more fuel goes to the engine. Less spring pressure on the
> >> diaphragm and the lower the pressure in the injector line needs to be to
> >> allow the bypass and the less fuel goes to the engine because the little
> >> pressure valves open sooner.
> >>
> >>
> >> If it always pumps the same volume of fuel, and more is going to the
> >> engine
> >> it will burn and turn to smoke especially at idle and below 1/3 throttle.
> >>
> >> Now that explanation was for everyone else. Here is the Jason answer.
> >>
> >> Turn the little brass screw on the front 1/4 CCW and see if it helps! if
> >> it
> >> surges at Idle you went too far.
> >>
> >> Troy
> >>
> >>
> >> ----- Original Message -----
> >> From: "JShulman"
> >> To: "NSRCA"
> >> Sent: Thursday, March 08, 2007 5:06 PM
> >> Subject: [NSRCA-discussion] YS-160 setting
> >>
> >>
> >>> Hi all,
> >>>
> >>> I've got my friends DZ and the high end needle is 1 1/8 turns out. The
> >>> reg
> >>> is somewhere around flush. It smokes and bunch, smooth transition, but
> >>> 20ozs
> >>> in less than 8 minutes if I'm not careful. I remember hearing (being
> >>> told)
> >>> that there is a less consuming set-up that I haven't done yet. Anyone
> >>> know
> >>> what it is? Gonna fly again tomorrow and try it. Thanks.
> >>>
> >>> Regards,
> >>> Jason
> >>> www.jasonshulman.com
> >>> www.shulmanaviation.com
> >>> www.composite-arf.com
> >>> --
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> >>> 10:58 AM
> >>>
> >>>
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