Pitch and Throttle Curves

[uneverno]

Can someone point me to a website that explains this?

I'm wanting to move from FP to CP and I'm not getting it.

Thx,
Emil

[Danimal]

Check out this site . It may be what your looking for.
http://www.littlerotors.com/setup/pitchsettings.aspx

[uneverno]

Perfect,
thanks sir!

[hawkman]

You will like CP, its like a revelation once you get the hang of it...the heli will respond better.

Rob

[uneverno]

I can't wait. Weather here's still a little sketchy, but should be good soon.

T-Rex is a beautiful machine. It's almost together. Getting a PCM receiver tonight then need to set up the radio. Oh yeah, and buy batteries - I don't think the 1300 MaH's I have will cut it

[hawkman]

No...they wont last long. The 2100's are the very least you want...even 1800's wont last long...maybe 4 or 5 mins...the 2100's I have give me about 8 mins...could go to 9 mins but theres no point thrashing them.

Do get a good charger if you dont have one...theres quite a few out there..some nice ***** proof ones (no you are not an *****...you know what I mean)

I got one that will do up to 4 cells...very handy if/when I start using LiPos for my gasser RX pack.

I am using PPM and have had glitches...there are some issues with this...I was told to earth the motor...you can do this by going to the motor caseing...and then you connect into the battery lead NEUTRAL...one the battery side of the ESC...I also ran a lead to the tail servo bracket...and back to the motor...this will earth any static nicely...so far its worked well...but I still have a vibe issue with the head which will throw the RX about...which can cause a glitch.

Once you get good at the controls the Trex will handle a fair old breeze...its suprising...just go careful though as it will blow downwind quicker than you think

Rob

[uneverno]

No - I was kidding
I was figuring on using them to do the initial set up and maybe first test flight. I'm not even sure they'll be heavy enough to balance the beast.

I have a great charger and balancer (Triton JR w/ Equinox) which will handle up to 5 cells. Definitely no point in thrashing $ 80-90 a pop batteries.

I have a ways to go before getting the birdie airborn. I need to program my radio, and before I do that I need a thorough theoretical understanding of pitch and throttle set ups. I've scanned the site that Danimal sent and it looks quite good. Just haven't had time to sit down and read it.

One trick with the glitching, if you haven't tried it, is to put a ferrite ring on the ESC to receiver wire. The Align ESC that came with the heli came with that as well. If PCM glitches, I'll try your trick as well. I'm looking at the JR R790UL receiver which should pair nicely with my 6102.

First and foremost, however, I gotta pick out a color scheme and paint it!

[hawkman]

Ok, curves:

for the power/throttle you want the servo travel or end point ATV or whatever you call it...set to maximum values...like 100 percent either way. The ESC can then use the whole range...setting the values to less will reduce the ESC range and you wont get much power.

Other than that you have two channels on the one stick...so as you raise and lower the collective the pitch will increase/decrease...and the ESC mapping will adjust with this....the great thing with curves is you can go in to the menu and adjust if/when you feel you have to.

The key thing is getting a good headspeed...its crucial as its going to make the heli fly and will provide a good response....too low a speed and the heli will struggle to fly and response will be poor.

One thing to watch though...and the sims dont provide this very well...is 'vortex ring state' sounds a silly title but what it means is:

You are hovering about...and its calm...you drop the collective pitch and the heli goes down...you want to go back up...heli keeps dropping. The air being pushed down is coming up and over the blade tips...giving a nice stall. The best way out is to fly forwards out of the disturbance...descend nice and slow and you should be ok.

If you get a nice breeze you wont get the Vortex problem...as the disturbance is blown away towards the tail...taking it that you are hovering nose into wind.

The vortex thing will bite you when hovering about in a breeze IF you descend while going down wind...or backwards (facing the wind) while descending...because you are lowering the heli into the disturbed air as you 'go with the flow'.

I used to get this with a nitro heli I had...couldnt figure it out for a while till I started work with real helis.

To make a point, when you get used to the heli...go hover over some wavy/tall grass...when its calm the 'footprint' of the downwash will be nice and equal....if there is a slight breeze the footprint will be further back ....the breeze is blowing it back.
Hovering my Gasser the other night when it was VERY windy the footprint started just behind the tail!

Rob