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HomeAircraftHelicopterMain Discussion › Pitch Curves?
01-12-2009 11:22 PM  9 years agoPost 1
mirmanchuck

rrApprentice

Venice Fl.

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I have been flying for about 2 yrs and was told by the only guy I knew of at my club that flys helis to make a flat spot in the middle of my pitch curve for hovering. That makes the curve shaped like an S. So far this has worked fairly well.
Sunday a guest flyer brought his Trex 500esp, and Trex 700 Nitro out and gave everybody a show. He was extremly good!
He got looking at my Vibe 90 and suggested a few adjustments to my linkage, that worked out real good. He then looked at my pitch curve and told me it would be better to make the curve a straight line from zero to 100. Making sure we had 11 degrees pos at 100%, and 11 degrees neg at zero, and zero at mid stick. He says this makes the heli act the same at pos and neg pitch.
He flys so good and really smooth that I changed the Vibe to a straight line on pitch, but haven't had a chance to try it.
What way is better?

SpectraG/3Dmax
Trex600esp BeastX DFC
QAV500G Multirotor

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01-12-2009 11:30 PM  9 years agoPost 2
Steff Giguere

rrProfessor

St-Eustache, Quebec, Canada

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Using expo is a question of choice. I used to use it and then when I became better at flying I lowered it slowly until now where I don't run any expo anymore. Don't listen to everyone because everyone is different. I say try it and if you like it leave it, if you don't like it then don't use it. As simple as that.

Team Synergy, Rail blades, Team Scorpion, V-Team

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01-12-2009 11:30 PM  9 years agoPost 3
RaptorMan23

rrKey Veteran

Sioux City, IA

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Ive always heard that a linear pitch curve is best but Id say just try it and see what you think.

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01-12-2009 11:33 PM  9 years agoPost 4
Ray Fernandez

rrElite Veteran

Guam (U.S.A.)

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For me, a straight line is best. I wouldn't go -11 - +11 though. If your power band is good (engine performance is optimum) you really only need -9 to +9. At the most +10, -10. Again, that's my setup for pitch.

Ray Fernandez - GUAM

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01-13-2009 12:25 AM  9 years agoPost 5
Santiago P

rrProfessor

South West, Ohio

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Pitch curves are a very personal thing. If you are still hovering, what feels good to you may not be a straight line.

Now, if you are flying around and entering into basic aerobatics, a straight line like you described be best. You will also have to work a throttle curve to keep up with your flying. When you progress into faster, sequenced, and more complex aerobatics, a perfectly tuned engine on a Governor is on order.

The biggest trick about flying a straight 3d curve is to learn/feel where zero is, thats is where you spend most of the time.

why do we call it curve when it is straight is just funny

good luck

Team Minicopter - PeakAircraft.com
bavarianDEMON- Team Kontronik - Scorpion Motors-

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01-13-2009 01:12 AM  9 years agoPost 6
mirmanchuck

rrApprentice

Venice Fl.

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I am running a GV1 governor and the OSHyper is running great. I am doing basic aerobatics my first inverted hovering.
As for getting used to the zero, I have a hover/pitch knob that will slightly raise and lower the center point only so you can set the feel you want hovering.
It is going to rain tomorrow so Wed I am going to try the linear pitch curve on the Vibe. I will let you know how it went.
Also I think it will fly more like my realflite Simulator.

SpectraG/3Dmax
Trex600esp BeastX DFC
QAV500G Multirotor

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01-13-2009 01:33 AM  9 years agoPost 7
Jeff polisena

rrElite Veteran

westpalmbeachflorida usa

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I run pitch curve 0 to 100 in all modes then take 20 to 25% off the bottom of normal mode for spool up this will help you get used to landing without forcing heli down.

I stole it ,flew it and gave it back ;)

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01-13-2009 02:03 AM  9 years agoPost 8
Santiago P

rrProfessor

South West, Ohio

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mirmanchuck

I am more old school , unlike Jeff polisena, I run a hovering curve that is very diferent than the straigh line for stunt or 3D modes. I hover at mid stick at the lowest RPM the heli can stand before it oscilates from the dampeners. When I go into idle up is like a tottaly diferent helicopter and mind set.
That works for me.
Many others do like Jeff and run "almost" the same curve on all modes.

That is why I say is a personal thing. Give the diferent setups a good try (2-4hours) or until you get use to them and becomes second nature, at that point evaluate and decide if the new curve feels correct for the task you are trying to accomplish.
Let me give you an example: when I started flying inverted, the straight line feel twitchy when I hovered inverted, so I cheated and desensitized the middle, just like your 1st "S" hovering curves. Once I controlled the inverted, I went to the straight line which felt more natural for the aggresive 3D moves.

When I fly the AMA schedules I may use diferent idle up curve for each aerobatic manuever.
But for 3D, a -11 to +11 line straight as a Paris runway model.

Team Minicopter - PeakAircraft.com
bavarianDEMON- Team Kontronik - Scorpion Motors-

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01-13-2009 02:16 AM  9 years agoPost 9
Alpine

rrVeteran

Lexington, Ky

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This is kind of a funny story , at least to me and accentuates the advise you are getting in this thread . A couple of years ago I went out of town to fly with a different club and there was a champion f3c flyer there , I asked him to take a look at my machine , the same manufacturer as the one he flew , he took it and looked at it and put it in a hover .......it was extremely hard for him to hover and he told me I had to adjust and trim the heli , it was too touchy and unstable...well ..I let him adjusted and trimed for me and then I went on to fly it.. I hovered and then took it up and try to roll and loop and brought it down. it scared me to death... the throws were extremely long and very slow . I had to adjusted back to my liking and what I was used to. he could not handle my adjustments and I could not handle his.

Roberto Munoz
IRCHA #344

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01-13-2009 02:26 AM  9 years agoPost 10
chopper_crazy

rrElite Veteran

Delphos, Ohio

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My guess is that you are flying with a gentleman by the name of Mike Crites. He is a local at my club and is very good at what he does. He has helped me with numerous problems. Ultimately he just likes to help everyone he can in the hobby. If I were you, I would take all the advice he gives you and ask him questions if you don't understand. Mike is a great guy! Tell him I said hi and that it's freezing in Ohio.

It's a complex, costly, glow powered anti-gravity machine!

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01-13-2009 03:21 AM  9 years agoPost 11
Southern Man

rrApprentice

New Zealand

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Curves
I have been flying Heli,s for 15 years ,I use 3 flight conditions to suit what I am doing plus one for auto,s
A straight line in flight condition 3 for 3D type flying , S curve for hovering .
Get the guy to hover doing slow pirouettes with a straight line and compare It with an S type curve and you will see the difference .
I have found you just have to set the heli up for each Individual taste
I had a new chum the other day who someone had set up with a straight line and He had a lot of trouble until I flattened the curve at his hover point a little along with setting the motor curve to balance it out
He went from almost crashing It to having It sit there nicely
He went away happy .
Just my experience

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01-13-2009 03:25 AM  9 years agoPost 12
airboss

rrElite Veteran

OC ,california

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mirmanchuck
your buddy got it right when he went linear, but lots of guys have their own opinions. you may need full collective when that power goes out during your invert grass cutter.

Urukay HPS3 KSE 700 HPS3

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01-13-2009 04:37 AM  9 years agoPost 13
bigdog714

rrVeteran

Rochester, MN U.S.A.

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Your running a Gov., go linear, 0,25,50,75,100, the only helis I set up a little differant are my electrics, I use 25,37.5,50,75,100 for normal so that when I set my hold switch the swash drops to further insure my TX and RX are bound before I plug in the main. A 600 spooling up on the table is very bad.

MD 800
Logo 600SE
Logo 14/500 Carbon
Ballistic 700
HD 500V2
Hirobo 50E
Avant 90E

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01-13-2009 06:36 AM  9 years agoPost 14
kee660

rrNovice

SbhTWu

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Pitch Curves
For me, a higher + - pitch is better for a 3D flight.
about 12 degree for 50, and 14 degree for 450 with 12 tooth.
This will depends on RPM running..
For Transmitter pitch curves setting,
mine is like this... -12, -10, 0, +10, +12,
not a straight line.

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01-13-2009 06:43 AM  9 years agoPost 15
Portblock

rrVeteran

Van Nuys, CA

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For me, I dont have subtle stick movements, and I just recently tried a tiny bit of an S curve in my pitch, seams to help me a bit, basicaly, expo for the pitch in a nutshell.

The voices in my head can beat up the voices in your head.

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01-13-2009 06:02 PM  9 years agoPost 16
bigdog714

rrVeteran

Rochester, MN U.S.A.

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For Transmitter pitch curves setting,
mine is like this... -12, -10, 0, +10, +12,
not a straight line.
That is an interesting aproach, I might try that. I too prefer a higher pitch setting with very little expo. I am a thumb pilot and I like as much control as possible close to center stick.

MD 800
Logo 600SE
Logo 14/500 Carbon
Ballistic 700
HD 500V2
Hirobo 50E
Avant 90E

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01-13-2009 06:21 PM  9 years agoPost 17
Zaneman007

rrElite Veteran

Texas - USA

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I agree it is a personal pref.

That is why I don't really like to fly other peoples heli. Not sure how they will react until they do.

Some people like short throws, and some long throws. With the 9303 you have seven points, this allows you to fine tune the pitch curve as desired.

I run a straight line.

Old Guys Rule!

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01-13-2009 06:43 PM  9 years agoPost 18
JetFire

rrKey Veteran

The Golden STATE

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Its personal prefference. No method is better. Experiement with both and you will discover your own observations to determine which setup works better for you. I've tried both and like all my pitch curves the same on all modes including throttle hold with the exception of the lower half of Normal mode. The heli doesnt jump when you engange hold with this setup and you can utilize the entire pitch ranges rather than restricting yourself to a preset. There are other ways to accomplish this with the alternative setup but I found this the easiest. In regards to expo.. I don't like it either. However, when you are not comfortable with the controls its almost a must to aid in the gitters. Each heli has different flight characteristics and each pilot has different learning abilities so one setting from one to the other will very.


Trex700N Pro
DX8-2.4
Spartan/BL9088

-The ONLY way you fail is when you quit.-

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01-13-2009 07:03 PM  9 years agoPost 19
bigdog714

rrVeteran

Rochester, MN U.S.A.

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I agree on the consistancy, its hard to learn if all your helis don't feel the same, thats one reason why I fly Gov. on all my helis, the power is consistant and predictable.

MD 800
Logo 600SE
Logo 14/500 Carbon
Ballistic 700
HD 500V2
Hirobo 50E
Avant 90E

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01-15-2009 07:15 PM  9 years agoPost 20
MattJen

rrElite Veteran

UK

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the throws were extremely long and very slow . I had to adjusted back to my liking and what I was used to. he could not handle my adjustments and I could not handle his.

That made me smile, the amount of machines i have flown and i could not fly them, i let them have a go on mine and they go make a cup of tea after they have put an input in and wait for the hellie to respond...

I am like Monetypitvictim, i like to hover at mid stick so i have a shallower curve, deffinatly not linear, i then normally set up an idle up 1 and 2 and that is more of a straight line..

But someone rightly said, curves are personal thing, everyone has different shaped fingers, some are longer/shorter, their Tx sticks are shorter longer.

I normally try and hover someones machine so i get an idea of what they like to fly, i let them have go of mine and see if they like the way i fly, if they do i will slightly tweak their curve, not so much it feels like a different machine.. but just enough to make it more comfortable for them to progress..

we all fly different.

Matt

All The Best

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HomeAircraftHelicopterMain Discussion › Pitch Curves?
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