YS 1.40DZ Questions

[Bob Kane]

I plan on running a 16X12 for starters . . .


--- Larry Diamond <lld613 at psci.net> wrote:
> That could be the problem if the 17x12 is to much
> prop....I do have a 16x12
> I was going to give it a try...
> 
> Larry
> 
> -----Original Message-----
> From: discussion-request at nsrca.org
> [mailto:discussion-request at nsrca.org] On
> Behalf Of Adam Glatt
> Sent: Tuesday, May 17, 2005 9:03 AM
> To: discussion at nsrca.org
> Subject: Re: YS 1.40DZ Questions
> 
> Larry, you have this mixed up.  The 17x12 is
> recommended for the 160DZ, 
> not the 140DZ.  On the 140DZ I was running the
> 15.5x12w, spinning around 
> 8600.  I started with the 16.5x12w, but later tried
> the smaller prop and 
> found it worked a little better.
> 
> And if anyone find outs the secret to idling a 140DZ
> slowly, let me 
> know.  To get the idle lean enough to get down into
> the 1800RPM idle, 
> the pump has to be too lean for full throttle.
> 
> -Adam
> 
> Larry Diamond wrote:
> 
> >I refitted my Focus with a YS 140DZ. Don't know
> that I'm getting the power
> I
> >should get. With that said, I now fly with less
> throttle than the YS 140L;
> >45 degree up lines are now at ½ throttle and
> vertical lines are about ¾
> >throttle.
> >
> >Here is my set up:
> >
> >1)	Medium size fuel tubing, new (no air bubbles
> noted)
> >2)	Power Master 30% DZ
> >3)	APC 17x12
> >4)	NMP Header from Central Hobbies (Having problems
> stopping the
> >exhaust leaks at the head, using Permatex -26B- Red
> RTV Silicone, rated at
> >650F+).
> >5)	5/8" coupler
> >6)	698 Hatori pipe.
> >7)	Check valve on the vent line.
> >8)	16oz Sullivan fuel tank w/ foam clunk (because
> that is what was in
> >it before. Any recommendation for a 20 oz tank?)
> >9)	Pump is about ½ turn in from flush.
> >10)	Needle is at about 2 turns out.
> >11)	Max ground RPM - 7,900 / Air Temp - 60F
> >12)	Idles -reliably- at 2,600 RPM
> >
> >Not necessarily considered broke in yet, 4 tanks
> ran on the ground
> >(following the steps by Don Szczur on Radio South's
> website) and two
> flights
> >with the Intermediate sequence...
> >
> >What prop is being used and what RPM should be
> expected with PM 30% DZ?
> >  
> >
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Bob Kane
getterflash at yahoo.com

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