[NSRCA-discussion] YS 140DZ tuning question

[Archie Stafford]

I'll be repainting a fuse the next couple of nights, due to a similar issue
last Thursday night.  Flat mowed field, with nothing to hit....EXCEPT the
CONCRETE CULVERT that was not visible..hit it square, cracked the fuse on my
Mantis...4' either way and it rolls out without hurting anything.....it
needed repainted anyway...

Arch


-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Bob Kane
Sent: Monday, May 01, 2006 4:49 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] YS 140DZ tuning question

Hindsight is always 20/20. The motor quit once in four
flights the day before, but the wind was not nearly as
strong and I brought it back to within 20 feet of
where I was standing. On Sunday it quit in almost the
same position, but I did not anticipate how strong the
wind was up 100 or so feet. I got the plane turned and
pointed back toward the grass, but it slowed to the
point of stalling as I tried to make it back. I know
from exprience a controlled landing is better than
falling out of the sky, so I opted to let it land in
the rough rather than risk stalling it trying to
stretch the glide.

"Troy A. Newman" <troy_newman at msn.com> wrote:

> That was position not prostitution!
> 
> Spell checker going too fast
> 
> Troy
> ----- Original Message ----- 
> From: "Troy A. Newman" <troy_newman at msn.com>
> To: "NSRCA Mailing List"
> <nsrca-discussion at lists.nsrca.org>
> Sent: Monday, May 01, 2006 12:53 PM
> Subject: Re: [NSRCA-discussion] YS 140DZ tuning
> question
> 
> 
> > I would recommend leaning the HS a few clicks and
> try it out and see if 
> > its too lean. If its not too lean then fly it and
> see.
> >
> > The DZ motors run in a leaner spot of the HS than
> an pressurized version 
> > will. Yes it will make great gobs of MOE rich but
> it will not idle well if 
> > its too rich and it will shake bad too. Just lean
> it down a bit and see 
> > where it wants to be. I usually end up with a
> fairly new motor about 
> > 1.25turns out. You are a little further away and
> most like 1/4 turn on the 
> > needle will solve the problem for you.
> >
> > Basically a good rule of thumb on any motor is to
> not be a prostitution 
> > where if it quits right now you can't make it
> back. I guess you learned 
> > that one this time.
> >
> >
> > Troy
> > ----- Original Message ----- 
> > From: "Troy A. Newman" <troy_newman at msn.com>
> > To: "NSRCA Mailing List"
> <nsrca-discussion at lists.nsrca.org>
> > Sent: Monday, May 01, 2006 12:42 PM
> > Subject: Re: [NSRCA-discussion] YS 140DZ tuning
> question
> >
> >
> >> Bob,
> >>
> >> too rich...most likely on the HS...but could be
> too much pressure out of 
> >> the
> >> pump.
> >>
> >> Its no longer a pressure regulator its a pump.
> This is common when the HS 
> >> is
> >> too rich...the raw fuel is dumped into the head
> of the engine and puts 
> >> the
> >> fire out.
> >>
> >> Troy
> >> ----- Original Message ----- 
> >> From: "Bob Kane" <getterflash at yahoo.com>
> >> To: <nsrca-discussion at lists.nsrca.org>
> >> Sent: Monday, May 01, 2006 10:50 AM
> >> Subject: [NSRCA-discussion] YS 140DZ tuning
> question
> >>
> >>
> >>> You may have seen my previous post about
> replacement
> >>> landing gear for my Temptation which were broken
> by a
> >>> "landing" in a farmers field after an untimely
> >>> deadstick.
> >>>
> >>> I could use some DZ tuning guidance. I'm pretty
> good
> >>> at setting up the FZ/L series, but this
> experience
> >>> does not help much with the DZ.  The deadstick
> occured
> >>> on a downline after testing the vertical
> performance.
> >>> I pulled the plane vertical and rolled on the
> throtle,
> >>> it rocketed straight up. Satisfied with the
> ample
> >>> vertical performance, I rolled the throttle back
> and
> >>> did a sloppy wingover to get the plane pointed
> back
> >>> down. I pulled back to horizontal and rolled the
> >>> throtle up to about 1/2 and watched in shock as
> the
> >>> prop slowed and stopped. You know the rest of
> this
> >>> story.
> >>>
> >>> Is this a symptom of too rich, too lean, bad
> plug or?
> >>> The needle was open 1 5/8 turns, which seemd to
> be
> >>> good on the ground. I was running PowerMaster
> 20% DZ
> >>> blend, Mejzlik 16X12 prop, OS F plug. The tank
> is on
> >>> the CG, YS foam clunk, no header tank. The vent
> line
> >>> has a check valve to keep fuel from leaking out.
>  My
> >>> plan right now is to bench run the engine to see
> if I
> >>> can figure out the needle sweet spot, but I know
> >>> performance in the air can vary. Any help is
> >>> appreciated.
> >>>
> >>> Bob Kane
> >>> getterflash at yahoo.com
> >>>
> >>>
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> 


Bob Kane
getterflash at yahoo.com

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