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Old Jan 05, 2012, 01:37 PM
United States, CA, Santa Rosa
Joined Mar 2011
882 Posts
Quote:
Originally Posted by turnerm View Post
Thanks. I'll experiment and see what works. But I did fly a few packs with my throttle curve at 100 across the board and I was OK with it.

The only thing I probably need to do is to ensure that I don't have too much negative pitch below mid stick so I don't accidentally put it into the ground at full speed when I try to chop throttle. But I'm pretty good with the throttle hold switch so I should be OK
I use the top 2 settings on my dx8 with 100% idle up, one with a pitch curve with very little negative pitch and the other linear from 0 to 100%.

Get used to flying idle up, I find it is way more stable, and get used to using throttle hold when you get into trouble and not chopping the left stick.
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Old Jan 05, 2012, 01:43 PM
Gone Huckin'
turnerm's Avatar
Charlotte, NC
Joined Jan 2011
9,259 Posts
Quote:
Originally Posted by asosestrom View Post
I use the top 2 settings on my dx8 with 100% idle up, one with a pitch curve with very little negative pitch and the other linear from 0 to 100%.

Get used to flying idle up, I find it is way more stable, and get used to using throttle hold when you get into trouble and not chopping the left stick.
Thanks. Based on what I've read today, I agree. I'll use Idle Up throttle curves and get used to it that way. I think my issue right now is that my pitch curve is a little too agressive on the low and high end which makes it very touchy.

Thanks for everyone's help on this!
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Old Jan 05, 2012, 03:05 PM
Augernaut
Wookster's Avatar
United States, KS, Overland Park
Joined Jan 2010
1,427 Posts
So I have a thought. I see a lot of people talking about how squirrely this thing can be. I have my normal mode toned down quite a bit on head speed. I have 65% throttle at full and then it works down from there, I don't remember the exact numbers. Essentially I adjust the pitch curve and throttle curve to give me a very slow turning head for indoor flying. It smooths the plane out a lot and makes it feel like there is more resolution in hovers because it now takes more collective to raise the chopper. The tricky part is getting the pitch curve set so that your hover position on normal intersects with the wide open stunt mode hover. It takes some time and you have to go back and forth a lot to tune it, but I have found it really makes the heli versatile. AS a side benefit, when you get a bit out of sorts it really reduces damage to the heli at that speed and stops it from taking out chunks of drywall. Are there any drawbacks to slowing down the motor ? It seems to give a bit more flight time as well.

Oh and BTW, this is my first CP chopper, I'm sure many of you are like me and have a habit of chopping the throttle after hitting throttle hold when she's going down. On your DX6(8) set up the throttle hold so that at the lowest collective position it goes back to neutral. It will save you some pain. I know its a bad habit that must be re-learned, but might as well have a damage control in the process or re-educating.
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Old Jan 05, 2012, 03:07 PM
mCPx
Race Miata's Avatar
Vancouver, Canada
Joined Nov 2004
168 Posts
Quote:
Originally Posted by indoorheli View Post
This really wouldnt be a factor even if his travel was neg 65 / pos 80 as The travel adjust is the end points of the curve.
Not true. The "travel adjust" name is misleading. It actually scales the stick travel range so that it maxes out at the #. If you set 50% up travel, any point on the upper half stick position will be reduced to 50%.
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Old Jan 05, 2012, 03:13 PM
Flyr John in Floyd VA
United States, VA, Floyd
Joined Nov 2007
542 Posts
Heli How-to book?

I've been flying planes for 4 or 5 years, took an occasional shot at a heli, but soon lost interest. Recently bought the mcpx, and am loving it. Finding it quite a challenge, too, as a number of others have indicated.

I've really been enjoying the last few pages of dialog about pitch and throttle curves, but they raise this question: is there a good book that you all would recommend that would help my learning curve with these, and other, setup issues? Don't need all the 'how to choose the right heli' stuff at this point, but would really like a primer on the basics of cyclic, collective, pitch, throttle, etc.

Thanks, John
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Old Jan 05, 2012, 03:24 PM
Registered User
Chicago Northwest subs
Joined Jan 2007
2,240 Posts
Quote:
Originally Posted by turnerm View Post
Thanks. Based on what I've read today, I agree. I'll use Idle Up throttle curves and get used to it that way. I think my issue right now is that my pitch curve is a little too agressive on the low and high end which makes it very touchy.

Thanks for everyone's help on this!
Take a look at this video. It explains how to setup the swash for less negative pitch, which will start the mCPX hovering at just past half throttle stick. If you decide to try it, be extremely careful with the aft ball on the swashplate. It's very fragile.
Mcpx 0 pitch setup (4 min 42 sec)

MR2
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Old Jan 05, 2012, 03:35 PM
2 seconds from crashing
indoorheli's Avatar
United States, WA, Seattle
Joined Sep 2007
7,349 Posts
Quote:
Originally Posted by Race Miata View Post
Not true. The "travel adjust" name is misleading. It actually scales the stick travel range so that it maxes out at the #. If you set 50% up travel, any point on the upper half stick position will be reduced to 50%.
The name is not misleading I think you might have pitch curves and travel adjust a little confused. Travel adjust restricts travel movement of the servo itself. It does not scale the stick travel range it stops it but does not compress the remaining values instead it limits your pitch travel via the servos maximum movement ......hence the name travel adjust.

The travel of pitch for the upper part of the stick will not all equal 50% if you set 50% travel. What ever stick input you give the output is determined by two main things, your pitch curve settings and the travel adjust which is the maximum you will let the servo travel at anypoint in time for that function. So basiclly the top part of the stick is capped at 50% and not everything from midstick and above unless you make so via your pitch curve.

So basicly it does what i was saying as it adjusts the end points of the curve and does not scale or compress them. Different or uneven end points will not make the heli jumpy from what he described. The heli will either loose more negative or more positive pitch.

When i said
Quote:
Originally Posted by indoorheli
This really wouldnt be a factor even if his travel was neg 65 / pos 80 as The travel adjust is the end points of the curve.
You can look at 65% TA the same as lack of a lot of the negative pitch range(since it limits the servos downward movement) probably near negative 3-5 degrees and 80 TA as around positive pitch 9-11 on the mcpx


Also think about it for the other travel settings such as aileron and elevator although slightly different as there is no pitch curve but the change to the servo is the same.
If you setup 50% positive and negative via travel adjust it is the same as 50% rates which really means you are only using 50% of the servos maximum travel above and below the servos center point
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Last edited by indoorheli; Jan 05, 2012 at 04:37 PM. Reason: added/corrected
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Old Jan 05, 2012, 04:50 PM
2 seconds from crashing
indoorheli's Avatar
United States, WA, Seattle
Joined Sep 2007
7,349 Posts
Quote:
Originally Posted by jhark37 View Post
I've been flying planes for 4 or 5 years, took an occasional shot at a heli, but soon lost interest. Recently bought the mcpx, and am loving it. Finding it quite a challenge, too, as a number of others have indicated.

I've really been enjoying the last few pages of dialog about pitch and throttle curves, but they raise this question: is there a good book that you all would recommend that would help my learning curve with these, and other, setup issues? Don't need all the 'how to choose the right heli' stuff at this point, but would really like a primer on the basics of cyclic, collective, pitch, throttle, etc.

Thanks, John
Best i have seen has been Bob's videos over on helifreak. Now these go way beyond a single servo swash setup and dont discuss 3 axis gyros, but if you watch them you will know more than you need for the mcpx and plenty for other larger heli's. My favorites are ccpm setup and pitch and throttle curves 101

YOU MUST BE A HELIFREAK MEMBER TO WATCH THESE VIDEOS

How-To Instructional Videos by Bob White (Finless)

General Maintenance Ad-hoc Video (20 Megs)
http://video.helifreak.com/?subpath=...aintenance.wmv

Trex Electronics placement and overview (28 Megs)
http://video.helifreak.com/?subpath=...lectronics.wmv

Blade Balancing 101 (35 Megs)
http://video.helifreak.com/?subpath=...lancing101.wmv

Programming the Futaba 9Z for a heli (78 Megs)
http://video.helifreak.com/?subpath=...rogramming.wmv

CCPM Setup Part 1 (58 Megs)
http://video.helifreak.com/?subpath=...CPM_Part_1.wmv

CCPM Setup Part 2 (58 Megs)
http://video.helifreak.com/?subpath=...CPM_Part_2.wmv

Pitch and Throttle Curves 101 (58 Megs)
http://video.helifreak.com/?subpath=...=curves101.wmv

401 gyro setup (48 Megs)
http://video.helifreak.com/?subpath=...gyro_setup.wmv

Align ESC setup (30 Megs)
http://video.helifreak.com/?subpath=...=esc_setup.wmv

Replacing the Align Auto-rotation Clutch (20 Megs)
http://video.helifreak.com/?subpath=...uto_clutch.wmv

Soldering Deans Connectors 101 (30 Megs)
http://video.helifreak.com/?subpath=...g_deans101.wmv

Bullet (Motor) Connectors 101 (50 Megs)
http://video.helifreak.com/?subpath=...bullets101.wmv

Servo Repair 101 (30 Megs)
http://video.helifreak.com/?subpath=...orepair101.wmv

Blade Balancing (30 Megs)
http://video.helifreak.com/?subpath=...lancing101.wmv

Ball Links 101 (20 Megs)
http://video.helifreak.com/?subpath=...l_Links101.wmv

Canopy Trimming 101 (28 Megs)
http://video.helifreak.com/?subpath=...imming_101.wmv

Thread Lock 101 (15 Megs)
http://video.helifreak.com/?subpath=...eadlock101.wmv
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Latest blog entry: FPV - DRQ250 and a little speed
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Old Jan 05, 2012, 09:17 PM
Registered User
M3_matt's Avatar
Lebanon,OH
Joined Oct 2002
381 Posts
Just a quick crappy quality video of me doing some inverted flying in my living room! I have been working on finally getting good enough to fly my Mcpx inverted in my house, and I have finally got to this point! It feels so good!!

Blade Mcpx inverted in living room! (1 min 0 sec)
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Old Jan 05, 2012, 09:28 PM
ferndale air force
FERNDALE AIR FOR's Avatar
Joined Jul 2006
3,095 Posts
Hey Gents, I went for stable and scale for my mCPX. And if a decent body kit comes up I will ponder it.
mCPX 2Jan12.wmv (4 min 2 sec)
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Old Jan 05, 2012, 09:36 PM
Registered User
Stugoose's Avatar
United States, NY, New York
Joined Jul 2011
791 Posts
Quote:
Originally Posted by M3_matt View Post
Just a quick crappy quality video of me doing some inverted flying in my living room! I have been working on finally getting good enough to fly my Mcpx inverted in my house, and I have finally got to this point! It feels so good!!

http://youtu.be/wMBvHIMhNqk
Thats one tall living room
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Old Jan 05, 2012, 10:15 PM
JOHN 3:16
Sammy70's Avatar
Central Ohio
Joined Feb 2008
6,285 Posts
Quote:
Originally Posted by Stugoose View Post
Thats one tall living room

I was thinking the same thing.

Nice inverted flying there inside the house!
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Old Jan 05, 2012, 10:41 PM
Gone Huckin'
turnerm's Avatar
Charlotte, NC
Joined Jan 2011
9,259 Posts
Quote:
Originally Posted by M3_matt View Post
Just a quick crappy quality video of me doing some inverted flying in my living room! I have been working on finally getting good enough to fly my Mcpx inverted in my house, and I have finally got to this point! It feels so good!!

http://youtu.be/wMBvHIMhNqk
Very nice!!
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Old Jan 05, 2012, 10:52 PM
United States, CA, Santa Rosa
Joined Mar 2011
882 Posts
Quote:
Originally Posted by M3_matt View Post
Just a quick crappy quality video of me doing some inverted flying in my living room! I have been working on finally getting good enough to fly my Mcpx inverted in my house, and I have finally got to this point! It feels so good!!

http://youtu.be/wMBvHIMhNqk
Nice flying Matt. I have a 22 foot ceiling in my living room. Now I'm inspired
I wanna do that too
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Old Jan 06, 2012, 12:06 AM
Registered User
M3_matt's Avatar
Lebanon,OH
Joined Oct 2002
381 Posts
Quote:
Originally Posted by asosestrom View Post
Nice flying Matt. I have a 22 foot ceiling in my living room. Now I'm inspired
I wanna do that too
Thanks! I think the key for me was to practice like a crazy man outside over the grass trying to flip and roll tighter and tighter with keeping the heli really close while hovering inverted, etc! Also like many have said here, practice catching the egg(rolling or flipping getting the right timing on trans from 0 pitch to neg pitch). Practice and a lot of broken tail booms, canopy pins, etc, has gotten me to this point!
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