[NSRCA-discussion] YS-160 setting

[R. LIPRIE]

Well can fly Otop on 20oz tank of fuel for about 18 minutes.  ( Magnum 
.number 2, 30% DZ Blend ).  Hope you get the problem sorted out.

Matt
----- Original Message ----- 
From: "Troy A. Newman" <troy_newman at msn.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Thursday, March 08, 2007 9:57 PM
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" <jshulman at cfl.rr.com>
> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> 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" <jshulman at cfl.rr.com>
>> To: "NSRCA" <nsrca-discussion at lists.nsrca.org>
>> 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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>>>
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>>> NSRCA-discussion at lists.nsrca.org
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>>>
>>
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