Lieber Besucher, herzlich willkommen bei: RCLine Forum. Falls dies Ihr erster Besuch auf dieser Seite ist, lesen Sie sich bitte die Hilfe durch. Dort wird Ihnen die Bedienung dieser Seite näher erläutert. Darüber hinaus sollten Sie sich registrieren, um alle Funktionen dieser Seite nutzen zu können. Benutzen Sie das Registrierungsformular, um sich zu registrieren oder informieren Sie sich ausführlich über den Registrierungsvorgang. Falls Sie sich bereits zu einem früheren Zeitpunkt registriert haben, können Sie sich hier anmelden.


Samstag, 11. Januar 2020, 08:09

Anleitung Nitro Motoren richtig einstellen

Hier mal ne gute Anleitung von tim Jones:

Tim Jones Nitro Tuning 101 - Basics - Part 1

Tim Jones Nitro Tuning 101 - Bench Talk - Part 2

Tim Jones Nitro Tuning 101 - Pro Tuning - Part 3

Kerzen + Nitrogehalt:
10 bis 30° Celsius Aussentemperatur Enya 4
-10 bis 10° Celsius Aussentemperatur Enya 3
WICHTIG dies bezieht sich auf 30%Nitro-Anteil.(bei ca 500m über Meer kommt am meisten Power mit 30%nitro)

OS kerzen haben jetzt neue nummern d.h:
Enya 4 = OS 4
Enya 3 = OS 3

zuerst Vollgasnadel:
lange steigen vollpitch. Rauch muss gleichmässig und ein wenig klingeln.

dann Mittelgasnadel:
steigen 3sek. dann sofort auf 0pitch . schauen das rauch bei 0 pitch gleichviel abgibt wie beim steigen. geht auch beim tictoc

dann nochmals Vollgasnadel kontrollieren.

dann Standgasnadel:
bei standgas darf der Auspuff nicht spucken und beim gasgeben darf der Motor nicht abstellen
bei autorotation sofort auf standgas gehen. Dies kann aber auch nicht
hörbar sein wenn die Kupplungsbacken noch greifen weil sie durch
sind(austauschen) oder der Kupplungsbelag fallsch eingecklebt wurde.

Hier noch ausführlich:

Bob mentioned this was a spur the moment type deal. Now that I've had
some time to gather my thoughts, I'd like to clarify a couple points I
was trying to get across in the video series....This is long overdue.

are many different methods for tuning a Nitro Engine. Understand that
certain flying styles demand "Tweaks" here and there. But the basic
method of tuning is the same, for all engines with a 3 needle
Carburetor. Most engine manufacturers have recommended factory settings
to get the engine to run. Use these settings to start. But understand
this is a broad recommendation. Where you fly, the fuel you run, the
glow plug you use, headspeed, gear ratio, type of governor , pitch
range, and pilot all effect the engines tune.

The method I've
developed over the past 4 years of flying Nitro powered 3d-helicopters,
is based on real life experience, and the practical application of the
knowledge I gained along the way. This is just what works for me, and
gets me consistent results. There are many view points, methods, and
opinions on the subject. Smarter people than I could talk circles around
me on the Theory of engine tuning. Theory is useful to grasp the
concept of what we are trying to do, but it ultimatly comes down to the
real world application of flying the helicopter. To me, above all, the
end result is what counts, and what I strive for.

Quick note: It
is absolutely vital to make certain both the Fuel system, and exhaust
system are “tight” and leak free. We are attempting to Very very finely
adjust an air/fuel mixture with a carburetor here. Any “un-metered” air
being introduced to the engine outside of the carburetor, we can not
control, and is going to cause erratic behavior. All of the tuning
efforts we make will be nearly useless, if we have ANY leaks! The
carburetor can only do its job if it has 100% control of the air/fuel
mixture! I can not emphasize enough how important this is!

that said, and before we get to turning any needles, We first need to
understand the basic relationship of the 3 needle valves and what areas
of "Throttle range" they effect:

The High end needle valve:
This controls the amount of fuel allowed at Wide open throttle.

The mid-range needle valve:
controls the "Ramp" between the idle circuit and full throttle. It is
adding fuel across this entire Range. As you progressively open the
throttle barrel, this needle is adding fuel as needed. When the barrel
reaches the full open position, the high end needle takes over
completely. For these reasons the mid-range needle is often referred to
as the “transition” needle. In order to get consistent power, these two
needles need to “mesh” with one another. With the ultimate goal of
giving the engine fuel, only when and where it needs it.

The Idle circuit controls just that, the mixture at idle.

we get to the practical application to the above theory, lets take some
time to understand what we are looking for, when we say “Rich” or

This is difficult to put into words so bare with me...This is much easier to demonstrate than explain through type:

Lots of thick/heavy smoke.
“Blubbering/unclean sound”
Raw Liguid fuel “spitting” out the exhaust pipe
The motor never seems to “get on the Pipe” or “clean up” and get out of the way of itself...
It struggles to RPM.

Inconsistent Thin smoke
Raspy, ping, ping, noise when under load
engine will feel like its making great power, and then fall off and
start to “sag” or “bog” once you put a consistent load on it.
The engine sounds sick/laboring really hard
Can produce over-reving high pitch type sound

Keeping that in mind. Here is my personal method, that I use on a day to day basis, in this specific order:

Remember to always tune Rich to Lean, not the other way around.

Tune the High end needle first:
something like a Full pitch Climb out/Big hurricanes/Full throttle
loops/Full pitch FFF/ Anything that's full wide open throttle. To
accurately test this, we need to “clean out” any residual fuel in the
engine from an excessively Rich, or out of tune mid-range....this was
illustrated in one of the videos. To do so, get the engine at Wide open
throttle and keep it there for 10 seconds or so.

Start/Find Rich,
Lean 2-3 clicks at a time until you find lean, Then Richen it back up 3
clicks. Don't be afraid to “find” lean, this will not harm the engine
what so ever, just don't keep it there! Find it, then back off. But we
have to find it in order to know where we are.

Once we've done the above the High end needle should be close.

Now Tune the mid-range needle:
something continuous, I prefer Elevator Tic tocs/Full cyclic
flips.....Try and load it up and see how the engine responds. How it
responds is going to determine what we do with the mid-range needle.

the engine sounds like its "blubbering" and just doesn't sound clean
and "on the pipe" its too Rich. If it goes into the maneuver kickin ass
and then starts to fall off/lose power its too lean.

Again tune Rich to lean here. Find Rich, tune to find lean, then back off 2-3 clicks.

that's done, re-visit the high end adjustment. It should still be very
close, minor 1-2 click adjustment to get it just right. Once satisfied
with high end performance once more, the Engine should have a “baseline”
tune. And the two main needle valves should be close to “synched”

we get to tune the idle mixture. The key here is to make sure the
throttle barrel Is only open far enough to be on the “idle circuit” too
far open and we are getting into the mid-range needle. And your hopes to
get a consistent idle go out the window. Tune the idle just like you
would the others. If the engine blubbers, and generally struggles to
idle its too rich. If the idle surges up/down, is inconsistent and makes
a sound its too lean. Leave this needle
at factory settings (generally 1 turn) until the rest of the engines
range is tuned.

Here is where we can stop, and call it “good enough” This will get you a pretty happy engine that will satisfy most.

If your looking to get the very last edge of Power, one has to combine
the above methods. Do continuous tic tocs, then immediately and without
hesitation, go into wide open throttle type flight. If you “breathe” the
engine between the transition from tic tocs to wide open throttle, the
test becomes no good. This is pretty difficult to do! What your
listening for here is how the engine responds through the transition
into wide open throttle, if it stutters, then quickly picks up, the
relationship between the two needles is too lean. If it blubbers, its
too rich. You're also looking for a consistent, smooth smoke trail
exiting the exhaust pipe. Along with “feeling” if the power curve is

And remember on all the above, the “mid-range” needle is
whats controlling this transition. The “high end” is simply controlling
wide open throttle. Blend the “mid-range” transition into the “high end”
mixture, not the other way around!

Its important to take this
step by step and get the two needles “synched” If the two needles are
not in line with one another, there is very little hope the engine will
be happy throughout its range, and it will have “lean spots” across its
power curve.

Tuning is an art. It can be frustrating to learn,
and its unforgiving. But its quite satisfying when you finally get it
right. I don't believe it can be taught. Rather learned through raw self
experience. This “guide” should help get ya going the right direction.
But ultimately its trial and error in order to learn it, and ultimately
get it right. You have to tune for your abilities and flying style. My
tune is not equal to your tune, or anyone elses. Each pilot needs to
tune to their own specific setup and flying ability. They may not all be
the same, but they can all be tuned well with the above method.

Great video's I was wondering which flybarless system Tim uses
On that heli I'm using V-bar on 4.0
have one question, on the bench talk vid it's said that as the fuel
level decreases, the mixture leans out, but will that happen using a
header tank?
A header tank will decrease this effect, but not eliminate it completely.
had always herd that if you run your engine lean even for a few sec.
Thats it, and you have started some process of premature engine failure?
few seconds, just over the edge of "lean," No, it will not harm a
thing. Flying around lean, long enough to build up heat due to lack of
lubrication, then yes.

Grüsse euer uese :prost: