RunRyder RC
 3  Topic Subscribe
WATCH
 1 page 535 views POST REPLY
11-26-2006 02:43 AM  11 years agoPost 1
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

I was just thinking about trying to use expo on my collective to make the pitch change more linear. I was told to use it for ail, elev, and rudder, to make the control movements more linear. I was trying to get my G3.5 Raptor setup like my real one, And I thought that when I set the pitch curve on my R30v2 to 5 deg at 3/4 stick the percentage in the radio was around 64%, on rf it is 75. I have my raptor setup for -10, +10 pitch range. I would be nice to set it some how so that 75% was 5 deg, and 25 was -5 deg. Is there a way to use expo on ch6 in the 9c super? It was just a thought. I figure if there was a way to do, and it worked out right, If I wanted -2 deg at low stick it would be 40%, 7.5 deg at high stick would be 87.5. In theory it should work out that every deg of pitch would be 5% on the curve. I just would like to here some thoughts from others on this matter.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2006 06:46 AM  11 years agoPost 2
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

Ok I don't think it can be done. I just was trying to figure it out for the heck of it, and got no where. BTW, I have a question about the throttle curve on my r30 w/32sx-h. my pitch curve is set very conservative in normal, -2,-1,0,4,7. This pitch curve gives me very gentle hovering. My question pertains to the throttle curve that goes with the pitch curve. My settings are 0,25,25,40,65. I do not have a tach, so I don't know what my headspeed is, I do know it is pretty constant, and climb seems to be good. Are those settings pretty common? I set idle1 in my 9ch the same except point 1 on the throttle curve is 25. I still have some fine tuning to do yet from switching to the new radio gear. I am not into fff yet.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2006 10:40 AM  11 years agoPost 3
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

My Posts: All  Forum  Topic

You can do 'expo' on pitch.

For instance, if you were starting with a straight-line pitch curve of

0 25 50 75 100, then changing the numbers to
0 35 50 65 100

would give you the same end result as if you had an expo adjustment on the pitch channel of your radio -- 'softer' in the middle but with full travel still available at the ends.

To match the throttle curve to the pitch curve, set up the pitch curve first, then fly and adjust and fly and adjust the thottle curve until your headspeed/engine rpms are where you want them to be.

Remember also that Normal Mode pitch and throttle curve adjustments are only effective in Normal Mode. You definitely want to enter a pitch curve into your Throttle Hold setup that matches whatever curve you end up with in Normal Mode. If you use Idle Up 1 and/or Idle Up 2 you'll have to enter curve info there too.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2006 05:31 PM  11 years agoPost 4
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

I just set it up in normal so it has nice manners for me to learn to hover better, As I get better I will make it a little more agressive. I have hold set to match my normal curve for now. I don't have any of my 3 idle ups set yet. I don't want it doing anything stupid if I do something more stupid, Like bump a switch.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2006 07:21 PM  11 years agoPost 5
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

-10 to +10 is a linear pitch curve.

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2006 10:49 PM  11 years agoPost 6
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

What I was getting at was that on the raptor with the long collective lever, I doesn't travel in as much of an arc as the servo wheel. With the wheel on the servo, you have greater pitch movement near center, than you do at the ends of servo travel. I wasn't tring to get a linear pitch curve, I know how that works. What I was trying to achieve can't be done unless I use a servo arm that is about 2 inches long.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-26-2006 11:08 PM  11 years agoPost 7
Micro-Maniac

rrElite Veteran

Pasco,Washington Formerly: Captain Chaos

My Posts: All  Forum  Topic

That's if you want closer mechanical deflection ratios - But the pitch curve GimbleFan posted is the equivelent of software exponential that will make the response to stick commands more linear if you don't like the feel of the subtle sensitivity differences between the neutral and extreme ranges.

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2006 05:17 AM  11 years agoPost 8
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

What I was trying to achieve was say you have a -10/+10 pitch range, 20 degrees total movement. In your radio software you havea range of 0 - 100 on your pitch and throttle curves. In theory every 5% in the pitch curve would be 1 degree of pitch. But that only works in theory. In reallity you get more of a pitch change near the 50% area than you do at 0 and 100. If you could use expo on your collective servo, and get it set to the proper amount, then for every 5% in the curve you would get 1 degree of pitch movment. If this could be done, and you wanted to change your pitch at 3/4 stick from 5 degrees to 3.5 degrees you would know that in order to do that you would need to take 7.5% out of that point on the pitch curve. Maybe I am trying to reinvent the wheel here but, think how nice it would be to be able to get the desired pitch range without having to get the pitch gauge out everytime. But as I was sitting thinking about that, I just thought to myself, that I don't need expo to just be able to dail up a number on my pitch curve and know what it is, I just need to see what setting every degree of pitch needs and keep those findings in my flight box, provided they are repeatable. Maybe when I get bored I will do just that.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2006 05:46 AM  11 years agoPost 9
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

My Posts: All  Forum  Topic

I bought a pitch gauge in the early days (couple years ago) and gave it away because I never used it. Some will say 'that's just wrong', but here's what's worked for me since day one, so far on an R50 and a Rex450 and on several others I've helped on setups with:

On the initial setup, with the pitch curves set at 0-25-50-75-100%, starting with ideal geometry in the servo arms & linkages, I adjust the tx endpoints for maximum travel of the swash plate (without binding) in a way that results in equal and maximum amounts of positive and negative pitch. Leaving the pitch curves at 0-25-50-75-100% I choose starting throttle curves that seem like they'll be right, with 100% at the top on each one.

I fly the bird and make adjustments to the middle points of the throttle curves.

If the engine (after break-in) seems to bog because there's too much max pitch, THEN I back off on the pitch curves until at max climb-out and max maneuvering the engine bogs only an expected, acceptable amount. Then, still with 100%'s at the tops of the throttle curves I fine-tune the middle points of the throttle curves to match the adjusted collective pitch curves.

Make any sense?

PS -- I suppose one could check the pitch settings with a gauge after the bird is fine-tuned just for future reference or comparison, but each new setup really does require the full tuning process to be done again anyway, so why bother?

On my R50 w/OS Hyper the pitch curves ended up w/94's for the maximums. On the Rex 450 with the stock Align 430L the pitch curves ended up w/92's for the maximums. Those numbers are more important for me to know than the actual pitch gauge readings. Others may disagree, but this works for me, and my birds fly far better than I'm able to fly them -- so far.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2006 06:07 AM  11 years agoPost 10
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

You hear so many different ways to do things from so many different people, What way is correct. My fisrt heli was a litemachines 110. That thing wasn't bad, So I bought a venture 30, and when I bought it from my lhs I was told to bring it back when I had it fully assembled with a good charge in the batts. I did this and they checked the usuall stuff. They then set my normal pitch curve to -2 -1 0 4 and 7. ANd set the thottle curve to what they thought it should be, and sent me on my way with a video that they had made for hovering. Well that was it, they didn't test fly it or anything. I got home, fueled it up and wow, much easier to hover than the lite machine. They told me to adjust the throttle curve so that the engine had a nice even tone to it from point 2 to point 5 in the thr crv. Well I didn't get much past the hovering stage, when I had on eof those life chaning events that tends to put hobby stuff off for a while. So I sold my venture. this past march, I decided that I was going to buy myself a raptor 30. So I did. I put it together and went to my lhs so they could check it out, and they where nice enough to do it for me even though I didn't buy it their. I started from the beginning with hovering and all. Well the middle of july, I had to put it on hold, but didn't sell it. I just got back to it last month, and decided to do a few upgrades in equipment, mainly new electronics. My old gyro was giving me some trouble, and I hated the tail drifting all the time. Well I set it up just like I was told to set just like they set it for me except the throttle curve. I do like the smoothness of it. I am still trying to master all aspects of the hover. It is going to take me a while to learn it all. Time comes at a premium with work, wife and 2 kids.

Sorry for getting off the subject, but I have my pitch and throttle curves where I like them and the engine has a nice sound to it, it's not screaming, nor is it running like my grandmothers buick, It just has that nice happy tone to it. Honestly I only used the pitch gauge to set the min and max pitch, and to get center stick 0. after I got it to hover the way I like it then I checked to see where I was with my pitch range.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
11-27-2006 06:17 AM  11 years agoPost 11
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

My Posts: All  Forum  Topic

Yep, you do find that 10 different guys will have 7 different ways of doing things. My experience has been that of those 7 different ways 2-3 are worth following. Often at the field you have to bite your tongue and let a guy learn the hard way how stuff works, but that's just part of the beauty of the sport.

I'm still amazed that, aside from what I spend on my stuff, I get to watch everybody else for FREE. Best entertainment in town on a busy weekend.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

PM  EMAIL  GALLERY  Attn:RR  Quote
11-28-2006 12:37 AM  11 years agoPost 12
bustedmp

rrVeteran

Shamokin, PA

My Posts: All  Forum  Topic

I'm still amazed that, aside from what I spend on my stuff, I get to watch everybody else for FREE. Best entertainment in town on a busy weekend
He(( yeah. It is fn watching others beat the crap out of their stuff. I can't wait to fly good enough To give my stuff a good work out. Until then I will just have to watch. I am hoping to have about a good 2 or 3 hours tomorrow to fly.

The world is yours!

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 535 views POST REPLY
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Saturday, January 20 - 9:18 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online