RunRyder - Setting up Ys 80 in Avant

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 412 ONLINE 42 EVENTS SEARCH REGISTER START HERE

1 page

324 views

POST REPLY

Boca Bearings	.	Modefo's RC Helicopters	.	XHELI.COM
	.		.

Avant Aurora - EFX - FX > Setting up Ys 80 in Avant

Heli-boy
Heliman
Location: Midlands, Ireland

Hi guys,
I apologise in advance, this is really an engine question. Was reading some of Augusto's stuff on true linear servo response and mechanical/radio setup. My question goes back to the old 40% hover point on Ys carb.
Ok, so I would like to use as much of the servos resolution as possible, in a perfect world this would be +100,-100 between idle and full bore,with 50% being approximately the bottom of my v-curve. so we all know this is rarely achieved, usually ending up with something like +90/-70 for example, where you do setup on the kitchen table and when out at the field you have to reduce bottom ATV to get tick over, with midpoint being perfect with linkage at 90 degrees.
But what do I aim for with the Ys carb ? Should midstick (0 pitch) be on 40% throttle point on the carb and neutral point on the servo ? This then throws the linear throttle response/servo position out the window yeah ? or am I missing something, or maybe thinking about things too much !
Any feedback greatly appreciated (Augusto ?)

Heli-Boy

03-07-2006 Over year old.

HOMEPAGE

mrNoodles
rrProfessor
Location: Borlänge, Sweden

Set it up like any other throttlelinkage.
Aim for +100/-100.
Will you be using any governor?

03-08-2006 Over year old.

HOMEPAGE

z11355
rrMaster
Location: 10000 is enough time wasted.

theres the issue.

the system (PCM I'm assuming) has 1024 (or 2048 if you have a 14MZ)
steps of resolution.

those steps are evenly distributed over the total servo movement
range.

That range is only fully exploited if you max out your ATVs, to
something *like* 140/140 (or is it 150/150 for you JR fans?).

Anyway, by limiting yourself to 100/100, you can easily see that
you are throwing away almost 1/3 of the total.

The counterpoints here are the non-linear response you get as you
move higher and higher past 100 or so (which you could mostly
cancel out w/ some expo).

Other factors are linearity of the throttle barrel and sensitivity
of the carb (ie. throttle response).

03-08-2006 Over year old.

HOMEPAGE

Heli-boy
Heliman
Location: Midlands, Ireland

Nobody has addressed my problem.
MrNoodles, I will aim for +100-100, all i'm saying is that I would say 99% of fliers will not have a +100-100 throttle endpoint/ATV in their radio. We all strive to get close to it.
The point of the question I had was : basic heli setup dictates that with controls at neutral all rods are at 90 degrees to servo arms/mechanical levers, usually equal thro on either side of neutral. Same goes for throttle (in normal mode), with barrell half open the servo is at centre of travel and servo arm is parallel to throttle lever and perpendicular to push rod.
However the Ys carb tells you that the 'hover point' is the mark on the barrell which equates to 40% open, not 50. So if you make this hover point the neutral point on the servo (i.e. mid stick) then the servo has 60% to travel to full bore but only 40% minus the idle percentage to go to tickover.
I guess I could set up my v-throttle curve now and not worry too much about the normal, straight line setup, as +/- 10 with a v-throttle curve is where all my flying will be done.
Any ideas ?

Heli-Boy

03-08-2006 Over year old.

HOMEPAGE

mrNoodles
rrProfessor
Location: Borlänge, Sweden

Heli-boy

Quote
But what do I aim for with the Ys carb ? Should midstick (0 pitch) be on 40% throttle point on the carb and neutral point on the servo ? This then throws the linear throttle response/servo position out the window yeah ? or am I missing something, or maybe thinking about things too much !

You can adjust the curve so you have 40% at any stickposition of your choice.
A linear set up will be fine, also if you´re not using a governor I assume you wont fly with a 0-50-100% throttle curve.
I have/had all my YS engines setup linear, works fine.

I think you are thinking about things slightly to much.

03-08-2006 Over year old.

HOMEPAGE

Heli-boy
Heliman
Location: Midlands, Ireland

mrNoodles,
I think you are right, as you say I will try to achieve a straight line in normal, so mid-point on stick will be a little beyond the 40% hover mark on the carb, but will adjust idle up curve to bring my 0degrees (midstick in 3D mode) to 40% point and fine tune from flight testing.
Thanks for bringing me back to reality !

Heli-Boy

03-09-2006 Over year old.

HOMEPAGE

1 page

324 views

POST REPLY

Autography FlightPower	.	Advantage Hobby	.	Revolution Models
	.		.

Avant Aurora - EFX - FX > Setting up Ys 80 in Avant

UPDATE SCREEN PRINT TOPIC

Advertisers

Subscribe to This Topic