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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › Help understanding where my needles are
10-13-2012 11:25 PM  6 years agoPost 1
coolgabsi

rrApprentice

Plano TX

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So started tuning my already broken inOS 55 hz.. I have a header tank and a multigov pro governor .

Ok so I start out leaning my needles slowly and at a point I hit good power! Loving the 55 size by the way. Lol

Anyways.. I started doing some things and now doing rainbows as soon as my head unloaded at the top of the rainbow and coming down till I would punch some negative I heard the engine revv up and sounded like it was lean. Did it again and It Was as much as I lost some smoke which is too lean running 30percent fuel.. So looking at that am I lean on the mid or the high?

I was told that my throttle servo (jr8711) is slow from some people in the field and I should put a cheap fast low torque servo there instead of the higher dollar but slower jr8711 I got on it (the same ones I have on my cyclics)

So tell me what should I change ... High or the mid?

Inspite of what I have read I was told at the field by a guy that I should start leaning out high and mid high and he was much more experienced and knew what he was Doing.. I didn't and it sounded wierd to me.. I bet he knows what he is doing but I might not be as good in listening yet.. Anyway. So can y'all help me with this?

Also any cheap but fast throttle servos y'all can suggest?

People call me crash master... for a reason.. :P :D

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10-13-2012 11:49 PM  6 years agoPost 2
Jerry K

rrKey Veteran

Houston Area

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You don't need a new servo. Think. Your servo only moves a 1 or 2 mm when the motor is up and running. Supose your throttle is 75% open and it needs to move to 85% open how far does the barrel actually move? About 1-2 mm. Now the difference between .10s and .20s travel for 90 Deg. divide that by how far the servo actually has to move in operation and you will see we are talking about micro seconds. The next thing to bring into the picture is throttle response. If you get the barrel moved faster will the motor accelerate faster, NO! It takes a while for the motor to accelerate, so moving the barrel faster will not make the motor run faster. In the time spans we are talking about!

Tune the motor or spend your money for nothing.

Now your servos are slow for the cyclic. Think. The servo moves, the swash moves, the blades move, the heli moves, all in a split second with no delay. You do have slow cyclic servos.

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10-14-2012 01:09 PM  6 years agoPost 3
barely can fly

rrApprentice

oxford ga. usa

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Tell the guy that told you to lean it he's an idiot, start with the mid and open or richen 1 or 2 clicks at a time you should see an improvement
This also dependent on how well it is tuned now and how hard you are pushing both sticks but start with the mid.

ATLRC wrecking crew / NCRC

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10-14-2012 01:58 PM  6 years agoPost 4
coolgabsi

rrApprentice

Plano TX

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Ok so my cyclics are slow? I have Been flying around perfectly fine with these.. I m not a smack pilot. The fastest maneuver I do is tic tocs. But I can't do them right even lol. So how much are the faster cyclics gonna make a difference there? Without spending 400 bucks on servos can you suggest some good cyclic servos also?

As far as starting lean and richening out. M confused. How do I tune that? I do have to start from factory default rich right? And.. For what I'm seeing now.. Which needle is out of order?

People call me crash master... for a reason.. :P :D

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10-14-2012 04:11 PM  6 years agoPost 5
barely can fly

rrApprentice

oxford ga. usa

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From where you are now increase the mid needle one click at a time trying it each time to look for an improvement.
Tic tocs are mid needle adjustment.
I don't think he mean't you need to change your cyclic servos, he mean't that you probably would not see any noticeable difference in performance between servo speeds.
Personally i use a throttle servo that is at least as fast as my cyclic servos, i personally have seen the throttle lag behind cyclic inputs on several helis when a slow throttle servo is used.

ATLRC wrecking crew / NCRC

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10-18-2012 01:18 PM  6 years agoPost 6
datidun

rrElite Veteran

N Ireland

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Barely can fly nailed there,i have a similar problem with throttle servo choice i discovered on one heli the throttle servo was lagging way behind the collective,when flying and doing Tick tocs it was in a bad state,i have just changed the collective with the throttle servo,at least now the throttle is ahead of the collective the way it should be.

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