RunRyder - Need Help Setting Needles on My YS-80...

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 675 ONLINE 19 EVENTS SEARCH REGISTER START HERE

1 page

765 views

POST REPLY

MTA Hobbies	.	Model Rectifier Corp	.	3D Heli Depot
	.		.

Engines Plugs Mufflers Fuel > Need Help Setting Needles on My YS-80...

Slider
Senior Heliman
Location: Orange City, FL

I am a little confused when adjusting this carb. I am running 700mm Rotorsports with a GV-1. I am mixing 15% CP and 30% CP with good results. The problem I am having is when running at 1600 RPM and below the engine is fine... purrs like a kitten. When I go to 1700, I get a little hesitation, and then it is fine. Then, when I hit 1800 on my GV-1, there is more hesitation and it sounds horrible. At 1800 it is very rich and is smoking like a chimney. So at 1800 RPM, am I getting into the range of the high needle setting? All of this is still in a hover. On the flipside, I noticed at 1600, the engine started sounding, for lack of better words, "tinney." Kind of like a real high pitch sound. I richen the hover needle up and it goes away. Any suggestions would be appreciated

-Mark

06-26-2002 Over year old.

vetrider
Elite Veteran
Location: Daleville, AL (Ft.Rucker)

YS80 carb settings

I got these settings from a former world champ. Aaahh 1995 I think

Quote
YS 80 Needle settings: Cool power 30% The stock settings are good for initial break in. After the break in process these are my settings for the STII barrel. Low - Flush with the carb barrel body Mid - .75 out from full lean High - .75 to .70 out from full lean

I tried this on my YS80/Hatori 985 muffler combo on 15%/30% cool power mixed 50/50. It runs PERFICT !!!

Nolan Manley
RREMODELS, KBDDintl, Magnum Fuel
Stratus, ODIN, Knight3D, ATOM 500, TREX 700N.

06-26-2002 Over year old.

Slider
Senior Heliman
Location: Orange City, FL

Interesting... I just can't get up the nerve to lean it out that much. It starts making a high pitch noise and I get scared

It is probably 4 cycling right now for all I know. I'd just hate to run it too lean...

-Mark

06-26-2002 Over year old.

spincycl
Veteran
Location: Marietta, GA

Im in the same boat

Slider, you are describing EXACTLY what mine is like at the moment.

Do you have the STII barrel in yours? OR, do you have the ST3 - that already has the correct barrel?

I have the latest version of the 80, and my needle settings are often a little richer that what the guys with the STII barrel need to run.

My GV will not even kick on unless it is lean enough. So, I TRY to make the best compromise. Keep the pinging down (the tinny sound) while having it lean enough for the GV to be happy.

So, here is where I am at: L: flush, M: 1 turn, H: 7/8 to 3/4 turn (depending on temperature)

I have beaten several OS 91's in drag races - and it feels good.....

I just wish that I could find the PERFECT settings, if they exist.

.

06-26-2002 Over year old.

HOMEPAGE

Slider
Senior Heliman
Location: Orange City, FL

I really don't know what barrel I am running. I picked my 80 up used. FWIW The guy mentioned something about a 120 pump though. Those needle settings sound familiar (flush, 1 turn, and 3/4 turn.) I think I am at 1 1/4 in the mid range though. The high end is the one I am concerned about.

Is the carb open enough at 1800 RPM to be running on the high needle setting while still hovering?

I also remember pulling a hard loop last weekend (+11, -11) and the engine really bogged down with the GV-1 on (1700 RPM.) But that is the least of my concerns right now.

As you can tell, I am pretty new to this beast and full of questions

-Mark

06-26-2002 Over year old.

spincycl
Veteran
Location: Marietta, GA

ys80

I am sure that there are other guys who are better at tuning that I am, so I'll leave that to them...

But, if you have the new barrel, you will notice that the barrel has no post on it for the throttle arm to screw onto. Basically, if you remove the throttle arm, the barrel is flush with the carb body.

BTW: I run CP30 on an SE with 700mm blades and run 11.5 deg pitch and it never bogs. I just want to get rid of that occasional pinging when the head unloads.

I am thinking of mixing CP30 and CP15 --- 20% fuel is a little harder to get around here....

06-26-2002 Over year old.

HOMEPAGE

Slider
Senior Heliman
Location: Orange City, FL

Well, I remember moving the position of the arm, and there was a post on the barrel. The arm screwed onto the post. I am starting to think that my high needle setting is too rich. I have the hover needle set so that the tinney sound has gone away. I might just concentrate on the high needle next time out. Thanks for the help

-Mark

06-26-2002 Over year old.

Slider
Senior Heliman
Location: Orange City, FL

Hopeless

Well, I tried the 3/4 turn on the hover needle and it sounded like a Kazoo on speed. It sounded nasty when the engine unloaded. So I am back up to 1 3/8 turn. I think the high needle is doing well though. I'm not even sure if I should be complaining. It was pulling through consecutive loops with little effort.

By chance, does anyone have a picture of the standard and ST2 barrel side by side? I looked at the barrel for the ST1 and ST2 over at RIcks and they look the same to me.

Thanks Again,
Mark

06-28-2002 Over year old.

Slider
Senior Heliman
Location: Orange City, FL

Yeah, I might just ask Marvin to help me out next weekend. TORCHS is extinct as far as I can tell. As far as the GV-1 goes, I have no complaints. It is when the engine unloads (going from positive to negative pitch while still right side up) that it cries bloody murder. Dunno if this is normal or not. But, I will get Marvin to check it out

I almost hate to ask him. He is always helping someone else and barely gets a chance to fly for himself...

-Mark

06-28-2002 Over year old.

gforce
Veteran
Location: Jacksonville FL

Mark, I tried 3/4 mid needle and 3/4 high needle, and my ys80 did not like it at all. Way to lean. No smoke at all in a hover. I only tried it for 5 seconds. I went back to 1 1/4 mid needle, and 1 high needle, with low needle flush with the barrel. It runs good there. Being here in Jacksonville I would think our settings would be very similar.

06-28-2002 Over year old.

Dirty
Senior Heliman
Location: Des Moines, Iowa, USA

3/4 on your midrange is too lean. Try more like 1 turn or a little more. I think I am running 1 turn and 2 clicks out on my midrange.

Settings are:

Low - just beyond flush
Mid - 1 turn & ~2 clicks
High - just under 0.75 turn open (maybe 0.70 or so)

These settings should get you very close as long as you are running the ST2 throttle barrel (the one without the arm extension built in).

Darren

06-28-2002 Over year old.

Slider
Senior Heliman
Location: Orange City, FL

Thanks Gforce, it makes me feel better knowing that I am not the only one above 1 turn at mid range.

Dirty, I don't believe I have the ST2 throttle barrel. I am debating whether or not to go ahead and spend the $20 for it. Is it really worth it?

-Mark

06-28-2002 Over year old.

Dirty
Senior Heliman
Location: Des Moines, Iowa, USA

ST2 throttle barrel

It doesn't cost you anything. Just call YS Performance and tell them that you have the YS80 throttle barrel and you are having problems with your midrange and they will send you the ST2 throttle barrel for free.

If they ask you to send back your YS80 throttle barrel for the exchange just tell them that you don't want to have any down time and they will just ask you to send it in after you have recieved the ST2 throttle barrel.

BTW......the YS80 throttle barrel has the built in extension for the throttle linkage....the ST2 throttle barrel does not.

I think that it is worth it.

Darren

06-28-2002 Over year old.

Slider
Senior Heliman
Location: Orange City, FL

Well, I got ahold of someone over at YS Friday afternoon and it happened just like Dirty said it would. I explained that I wanted to minimize the down time and they are sending me a new barrel tomorrow.

Dave, you aren't the only one who told me not to use the GV-1 with the old barrel, but I have been using it anyway. I think I found out why today. But I would like to hear the reasoning behind this. Any clues as to what is taking place?

-Mark

07-01-2002 Over year old.

gforce
Veteran
Location: Jacksonville FL

Hey Mark, this thread explains it perty well.

http://runryder.com/showtopic.htm?s...hlight=midrange

07-01-2002 Over year old.

Slider
Senior Heliman
Location: Orange City, FL

That's funny; I have never had the "burp" that they are speaking of. My 80 just doesn't like the GV-1 for some reason. It sounds horrible when engaged. But, on my last two flights, I never turned the GV-1 on. I worked on my throttle curve and the 80 ran great! I have never been happier. I will wait to see what happens with the new throttle barrel before I ditch the GV-1.

-Mark

07-01-2002 Over year old.

Dave_D
Key Veteran
Location: Philippines

Ditto Sliders comments.

Never experienced the burp while transitioning to inverted. I keep the GV-1 off though since I only use it for FAI hovering maneuvers and aligning my headspeed with my throttle curves. During 3D type aerobatics, I use a well tuned throttle/pitch curve with my radios built-in cyclic to throttle mixing capability.

07-01-2002 Over year old.

Slider
Senior Heliman
Location: Orange City, FL

Well, I finally received my new ST2 throttle barrel last week. I am still having the same problems. While in a hover it seems to run real nice at 1600 RPM. But, when I go to 1700 and then 1800 the engine gets progressively rougher. At 1850, it is very hard to control while in a hover as the tail is twitching all over the place. I have yet to get an answer to this question so I will ask again. Could 1700-1800 RPM be the transition point between the middle needle and the high-end needle? Or has it already transitioned to the high needle? I have the middle needle so that it doesn't bark when the engine unloads now, but it is very hard to fly it when the RPM gets above 1700 RPM due to the tail kicking. Should I only worry about the high-end needle now? Any suggestions will be appreciated

-Mark

07-14-2002 Over year old.

Dirty
Senior Heliman
Location: Des Moines, Iowa, USA

Test your High Needle

I assume your running +11 or 12 on the top pitch range so do this.....
Smoothly (but quickly) raise your throttle/pitch clear up, the heli should climb out like crazy...smoke should remain consistent, no more/no less and the engine should sound very smooth.....

If the engine gradually produces more smoke on the full power climb out then your high end is too rich.

If the engine gradually produces less smoke on the full power climb out then your high end is too lean.

Of course your mid and low end will effect this some, but this will help you on your way to getting the high end set.

07-15-2002 Over year old.

Maxx
Key Veteran
Location: Shreveport Louisana

Mark, if the tail kicks and the engine sounds "raspy" then the engine is running out of fuel! Enough fuel thru the orfice (needle valve) which is a set amount, is enough for the engine to turn 1650 but at 1850 with the same orfice setting the barrel opens more but the fuel flow remains the same as you set in the 1650 RPM position! Set the high speed and mid range for max flow required (1850 RPM ) and it will be slightly rich at 1650...but still OK... I set the idle first then the high , then the mid...I ain't smart enough to work all three at the same time! Chris

07-15-2002 Over year old.

1 page

765 views

POST REPLY

JR-Spektrum	.	Gyro Hobbies	.	E-flite
	.		.

Engines Plugs Mufflers Fuel > Need Help Setting Needles on My YS-80...

PRINT TOPIC

Advertisers

Subscribe to This Topic