DX7 and DD Tail Noob

[jorgy23]

I have several questions to ask.

1. Does anyone know where I can find a slightly more detailed description of how to setup the DX7 in a Blade CPPro. I think I have the throttle and pitch curves setup close to correctly but I don't think I have the CCPM mixing setup. " the bird wants to immediately tip on it's side and it takes a lot of stick to keep it upright.

2. I have heard that the tail rotor should always spin into the main rotor wash, or clockwise. but for some reason with my DD setup. The blade has to spin counter clockwise to correctly counter the rotational force. Am I misinformed or doing something wrong.

Thanks in advance.

[txflyer]

check and make sure your wires on the motor are correct. + to +, - to -. then your prolly going to have to flip your prop over. i cant help you on the ccpm setup. im still a noob. i hope to have my dx6 here by the end of the week. so i will going through this to. if you dont have it setup correct by the time i get my dx6 and pick up a ar6000. i could help you out, im getting a guy at my lhs who has been flying for a few years now. so it will be dead on.

[jorgy23]

This might help you with the DX6

http://bladecprepair.com/smf/index.php?topic=737.0

and I've already flipped the prop but it doesnt' seem to help still needs to spind counter clockwise to properly hold the tail..

[txflyer]

if your wires are crossed where there soldered to the motor it will cause it to spin the wrong way.

[Gino CP]

The DD prop was originally designed for airplane use. It was just retrofitted for DD applications. It performs very well rotating away from the downwash so no need to worry about it.

Set you DX7 throttle hold so that you get a linear pitch curve ( a straight diagonal line). Then disengage the main motor. Arm the heli and switch throttle hold on. Now position servo arms so that they are 90 deg from vertical. Best you can. They sometimes don't line up well.

Now put throttle stick in the middle. Hang the heli by the paddle control frame and adjust servo links so that the rotor sits in the middle of the rotor hub. This gives equal space to slide on above and below. Make sure swash is level or parallel to main gear.

Hang the heli by the paddle control frame and check pitch at midstick. It should be zero for both. You can adjust tracking later on when heli is hooked up.

Set CCPM mix so you get maximum servo rotor travel up and down without the servos buzzing. You also set the mix so that you get -/+ 10 deg pitch. You can fine tune these values after you evaluate the heli's response.

Set your aileron and elevator endpoints so that you get maximum angles without the servos buzzing.

[robl]

guys this has probably been discussed before, but I'd appreciate any help. First, I have the direct drive tail motor. Its supposed to spin counterclockwise right? Second, how do I know which way to put the tail rotor on? Finally, does anyone know how to set the mix so the tail will arm when used with its own esc on the dx7?

Thanks

Rob

[txflyer]

you just have to take the rudder / throttle stick and drop it to the bottem left hand corner till the esc arms.

the 3020 prop, the way i put it on is shiny side out dull side facing the motor

[Gino CP]

program your PMIX 2 to put some left rudder when throttle hold is switched on:

[PROG MIX2]
RUDD-RUDD ON
RATE +75%
0%
SW: HOLD
OFFSET: -125

[txflyer]

wow the things a good radio can do. not to thread jack but gino is there a way to maintain tail control when throttle hold is on, or if you have a mechanical failure causing the main to stop ? maybe program it into another switch. kinda like you hit throttle hold then flip another switch to regain control of the tail.

[Gino CP]

That is not possible with motor tail micros because tail control is managing the main rotor torque by producing thrust opposite that force. If the main rotor is stopped from spinning, there is little or no torque. So all the tail can do is turn clockwise. Cut the tail power and the tail stays put. You will not get a counterclockwise turn because there is no main rotor torque to make it do so.

[txflyer]

wow i should have been able to figure that one out.