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e-E-Flite Blade CP CX 400-3D > 7CHP Set up for BCP
 
 
NoVNE
Senior Heliman
Location: normally N Attleboro, MA currently Kuwait

I am a bit frustrated now trying to get this foolish transmitter to make the servos act the same as the stock transmitter, at least to have a starting point for further fine tuning.

I did a search here and found a few different set ups and none of them seem to be working.

For some reason I cant get the throttle to raise and lower the swash collectively like it's supposed to.

Also the aileron and elevator inputs are not cooperating.

I sat down with the heli and the stock controller and mapped out which way the swash moved and which way each servo moved to accomplish the input and no matter what I do with the Futaba I can't even get it close.

Apparantly I am missing a critical part of the programming sequence and I think I'm too aggrivated at this point to make any further progress this evening, so I'm shutting everything off and walking away for the evening to go fly my G2 sim for a while.

If anyone has any suggestions they would be much appreciated, and short of "did you turn the controller on and plug in the battery on the heli?" no question or suggestion is too basic.

This is my first experience with the computer controller and it is kicking my butt. However I can confirm that the controller was on and the battery was plugged in


Thanks for the help,
Thad
05-30-2006 Over year old.
HOMEPAGE  
 
 
lryansl
Senior Heliman
Location: Yuma, Arizona

Sounds to me like you have the wrong swash setup programmed it has to be set on SR3, thats my guess anyways. Good Luck.
05-31-2006 Over year old.
 
 
Rare Bear
Heliman
Location: Stockton, CA USA

No "Velocity Never Exceed," huh? Well, with the Blade, you will definitely hit up against a Vne!! Actually, I never experienced any sort of retreating blade stall, or any other aerodynamic gremlin - just the ground that reached up & slapped my heli out of the sky; gets me every time.

As for the Futaba 7CHP, I feel your pain - was quite the setup for me, and I'm still learning. Here's something that helped me out, but remember, you will have to make some fine adjustments here & there - always tinkering with these heli's!! God bless - "Rare Bear"


Possible Settings for 7C

Swash: HR3

Aileron -80%
Elevator +80%
Pitch +25

Normal Throttle Curve: 0,25,50,75,100
Idle Ups Throttle Curve: 100,75,50,75,100

Normal Pitch Curve: 40,40,50,75,100


D/r,EXP
1-AIL down
D/R: 140
EXP: -5

1-AIL up
D/R: 140
EXP: -0

2-ELE down
D/R: 140
EXP: -5

2-ELE up
D/R: 140
EXP: -0

4-RUD down
D/R: 100
EXP: -5

4-RUD up
D/R: 100
EXP: -0

Isaiah 40:31
05-31-2006 Over year old.
 
 
NoVNE
Senior Heliman
Location: normally N Attleboro, MA currently Kuwait

Thanks Rare Bear

I'll give that a try this afternoon. I tried all the swash settings and none of them even seemed to move the right servos much less in the right direction.

I tried reversing the same servos as on the stock controller as well as a couple of setups from searching here that had a different sequence of norm/rev.

"NOVNE" was a licence plate a friend of mine had that I thought was pretty cool.
Interestingly enough (I found out later) most RC helis could never reach their aerodynamic VNE in the classic sense of the word. The head speeds are traditionally too high to get into retreating blade stall. However they would have a structural VNE, but I havn't seen any RC helis where reaching this speed is an issue. I suppose it may be for the turbine models. Forward airspeed limitations based on other aircraft limitations (power available for example) are not considered a VNE. We reach our Vh(max velocity at which level flight can be maintained) all the time in the Hawk due to hitting the Turbine Gas Temp limits or Tourque limits, well before reaching VNE (193 kts) especially here in the desert.
My heli has also suffered "ground poisoning" well before reaching it's maximum velocity.
Blah blah blah, long story short, I thought it was a cool plate.

Thanks again,
Thad
05-31-2006 Over year old.
HOMEPAGE  
 
 
JB642
Senior Heliman
Location: Waterford, MI - USA

NoVNE -

The biggest difficulty with getting the swash to move correctly is selecting the swash type in the 7CHP, having the servos plugged into the correct channels and then gettting the ail/ele/pit settings correct in the swash menu.

Here is a very good description of CCPM setup by Gary Hoorn:

http://runryder.com/helicopter/t253805p1/ (third post down) and

http://www.runryder.com/helicopter/t225193p1/

I like Gary's technique of not using servo reversing and trying to get the swash set up just using the "swash menu" and positive or negative settings there. Make sure your servos are plugged in to the 4 in 1 as per his instructions!

My settings are:

Swash type - H-3

In reverse menu -
Ch 3: rev
Ch 1,2,4,5,6: nor

In the swash menu - (change the numbers to get the correct amount of movement of your swash). Mine are:
AIL -70
ELE +70
PIT +40


Other combinations of rev/nor (for the channels) and +/- (in the swash menu) can work also!

Have fun - JB
05-31-2006 Over year old.
 
 
NoVNE
Senior Heliman
Location: normally N Attleboro, MA currently Kuwait

OKAY...I've got the servos all acting in the correct direction at the correct time with the correct control input.

However, the RX will only arm at full up throttle, as opposed to at full down throttle as with the stock TX.

And I still havn't been able to program the idle up mode, though I'm not so concerned with that at the moment.

This has been a great learning experience, thanks to all who posted back. I certainly have a much better understanding of the relationships involved in the control inputs.

So...How do I switch the RX arming throttle position?

Thanks,
Thad
05-31-2006 Over year old.
HOMEPAGE  
 
 
JB642
Senior Heliman
Location: Waterford, MI - USA

(Oops - I mis-stated what my channel 3 did in the previous post and it is now corrected)

Throttle channel is 3.

My channel 3 is reversed for the same problem you had - throttle arming at full up instead of full down -

Try reversing channel 3.....

JB
05-31-2006 Over year old.
 
 
NoVNE
Senior Heliman
Location: normally N Attleboro, MA currently Kuwait

It's working!!!!

WooHoo, that did it, it's working as advertised now.

There's still some work to be done on the fine tunining but first I have to fix the tailboom so I can go flying.

Can I use the TX to control T/R RPM to reduce the burning out of the motors on LiPos? They just don't seem to last very long so I've gone back to stock. I like the DD t/r but not the lack of reliability.

Thanks again,

Thad
05-31-2006 Over year old.
HOMEPAGE  
 
 
Skiddz
Veteran
Location: Carlsbad, CA

Don't know if tweaking the end points on the TR might slow the motor down. I had a problem with my DD tailrotor motors burning out very quickly. I run the GWS F50H motors with GWS 4530 props cut down to 3.75" and the problem is pretty much gone. Some others have suggested the GWS 3030 props with this motor as well. If you're runing the plastic GWS DD mount, you can turn the motor around, reverse its direction of rotation and turn it into a tractor and blow air over the motor while it's running. Unfortunately, my setup won't allow me to do that. (Aluminum mount from the Dynamic CNC frame kit)

A helicopter is 10,000 parts spinning rapidly around an oil leak.
05-31-2006 Over year old.
 
 
NoVNE
Senior Heliman
Location: normally N Attleboro, MA currently Kuwait

Ive got the same motor, but was running the GWS 4530 at full length. I have the stock T/R motor mount so I suppose next time I change a tail boom I can flip the mount over. I have a vertical fin I can put in front of the mount to act as the tail stinger as the one on the mount would be facing up at that point.

Thanks I'll try the DD set up again next time there's some surgery to be done.

Thad
05-31-2006 Over year old.
HOMEPAGE  
 
 
saahbs
Senior Heliman
Location: Aurora, IL.

Note that on some radios you have to hook up CCPM servos to the channels stated in the manual.

So if the manual says left rear ccpm servo goes into ch.1 and you swap it with ch.2, you might not be able to get it to work.

This was the case with my Futaba 8. I wasted an entire evening trying to get it to work, until I realized the cause.

Mike.

--
I fly airplanes, sailplanes, helis; nitro and electric.
05-31-2006 Over year old.
 
 
NoVNE
Senior Heliman
Location: normally N Attleboro, MA currently Kuwait

I think my first confusion was the diagrams in the 7CHP manual show the 120* CCPM swash configuration as the reverse of the Blades with the elevator to the rear instead of in the front.

Once I started to understand how it was working it got a lot easier.

Thad
05-31-2006 Over year old.
HOMEPAGE  
 
 
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e-E-Flite Blade CP CX 400-3D > 7CHP Set up for BCP
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