Conference vmszoo::rc

    Jim,
    	Check the Total Travel of both channels in BOTH directions.  You
    may have unequal travel on one of the channels.  If the servos both
    move the same when plugged into a Y harness, they should move together
    when plugged into two separate channels.
    
    Charlie
    

    The other thing to verify is that you have the servo arm coming off at
    90 degrees so you don't introduce any mechanical differential. At
    nuetral you want the arm pointing straight down otherwise it will be
    more (linearly) effective in one direction. Offsetting the arm from
    perpendicular is one of the ways differential was induced before
    computer radios.

    I am performing the checks with the JR receiver completely removed from
    the plane, and using 2 JR 507 servos.  Each servo starts with it's
    control arm at 90 degrees to the servo case.  The motion is about
    60 degrees in one direction and maybe 10 degrees in the other.  In
    the July 1991 issue of RCM Don Edberg reviewed this radio and discussed
    some problem he had with aileron differential.  He claims he called
    Mark Allen of Flight Lite Composites(Falcon 880 fame) and Mark told
    himn the callouts in the manual were reversed. Edberg's description
    of the problem and the resolution are not clear to me.  Any additional
    help/suggestions appreciated.
    
                                                  Thanks,
    
                                                  Jim 

    Well, I'll just reinforce .1's (was it Charlie or Steve?) advice and
    check the travel adjustments. You have to move the stick slightly to
    adjust the "other" half. I think mine comes up for the left travel
    adjustment by default and I have to move the stick right to see the
    other side. The two sides are separate and this is how you can do it.
    Another thought would be to throw the reverse switch and see if you get
    the 60/10 split in the opposite direction. I'll be fiddling with mine
    tonight and look at that section also (I'm reprogramming some reflex
    for this windy fall season)

    RE -1
    
    Jim,
    
       I think this is where the problem lies.  When I bring up the menu
    for servo travel(ENPoint adjustment?), it shows me only the letter
    R for both ailerons 1 & 2.  The manual talks about moving the stick
    in the other direction to "see" the change on the LCD(which I presume
    is L for left).  I never see an "L" appear when I move the stick.
    The manual is not real clear on this point.  Can you provide a more
    detailed description.
    
                                                          Thanks,
    
                                                           Jim

Jim,

	What type of wing do you have programed in? Also, what type model.
In other words, the wing type should be "flaperon", not delta or any of the
other choices. The plane type should be "acro", not glider or heli.

	When you step through the menu and, for example, go to TRA. ADJ,
AILERON, you set both the left and right throw seperately. You do this
by moving the stick in the desired direction and then setting it. The display
should change showing either L or R. Same is true for the rudder. Same is
true for the elevator only it's U or D. The display will also show you a 
+ or -. (plus or minus). The percent you set is away from the center point
in either the plus or minus direction. Either one is correct depending on
which way you need the servo to move. Even though you may want the servo
(aileron) to move UP, you may have to program in a - (minus) number to 
achieve that result. Don't forget, both servo's can't move in the same 
direction, so one of them has to be reversed. By reversing it, you may have
to go negative to get an upward movement.

Steve 

    Well.. You move the stick, the letter changes. Try moving the stick
    both ways. You have to hold the stick to that side to have the change 
    take effect. On the auxilary channel, you'll have to find out whith
    control is handling it and twist the appropriate knob to get the letter
    to change. Without the manual in front of me, I can't tell you which
    knob but there is a control for each channel (in the unmixed mode) and
    this will be what has to be used to select the side to adjust. Took me
    a while to get the hang of it also. In the mixed mode, it might be the
    aileron stick for both channels, dunno. 

    Re: .6
    
    I'm pretty sure it's a glider, Steve, but this section should be
    similar. He's using the dual aileron mode. You might want to check out
    the four servo mode which I found allowed me to program flaps to the
    throttle/spoilers stick and droop the ailerons some without the
    flaps/servos. I used this to get flaperons on the throttle stick
    instead of a knob on my CB99.

You said you were using the aileron and GEAR channel's for your ailerons. This
doesn't sound right to me. For one thing, I believe the gear channel has a set
throw which is either greater or less than normal. The second thing is,
FLAPERONS is the combination of FLAPS and ailerons. Mine is set up with one
aileron in the aileron channel, and the other in the flap (AUX1) channel. There
is no other mixing required. Selecting the FLAPERON wing type AUTOMATICALLY
mixes aux1 and aileron.

Sounds like you probably mixed the GEAR channel to the AILERON channel or
something like that. I'm not sure what results that would give you but I'm
sure things won't work right.

Steve

I guess a Robbe Arcus IS a glider. Sorry Jim, but I have never played with
the glider section.

I would still check the setup and check any mixing you may have done. One of
the reasons for having the different wing choices, is that when selected, 
certain mixes are automatically done for you. If you've done any mixing on your
own, you may have cancelled something out.

Steve

    Yep, I agree. I assUmeD the stock mixing selected and you were trying
    to play with the travel.
    
    The neat thing about the 4 servo mix is that it gives you flaps for
    free and you don't HAVE to use them. Putting them on the throttle stick
    is just a matter of mixing the throttle to be 100% master on the
    primary flap channel. In 4 servo mode, the ailerons follow
    automagically. This one I've personally done and can mail you the
    specifics off-line if you'd like. It's basically a full camber mode
    without the flaps actually being there. Nice for those slow thermal
    turns and landings and the elevator/flap and flap/elevator combinations
    all work.
    
    Steve, 
    	Thanks for the reminder to write down the 4 models I have
    programmed. I don't think I'd like to start from scratch again.

    Got home late last night, so I did not have much time to figure
    out the problem, but one thing I did do was reset the configuration
    to factory setups.  After this, I then had linear aileron movement.
    I then set the aileron differential, and it appears to work.  So
    some other parameter must have caused the problem.  I will be finishing
    the program this week and will report any problems.
    
                                                  Thanks,
       
                                                  Jim

    I figured you'd have it fixed. I have mine and my manual in my desk
    today. Our secretary stopped by to find the cricket in our area due 
    to me scrolling through the models to copy down my settings.

    Steve is right, You need to put the other airleron into
    AUX 1. I have the same hook up on my Super Chipmunk. It
    works fine.........
    
    				Tom

    In glider mode, the two aileron servos go in channels 2 (ail1) and 5
    (ail2) and the 2 flap servos go in channels 6 (flaps) and 7 (aux2). If
    you use the flaps to aileron (4 servo) mix but omit the channel 6 and 7
    servos, the ailerons will droop for flaperons and the differential mode
    will still work. That's the way I did it for my Cloud Bound 99 as well
    as using a free mix between 1 -> 6 always on and 100% to move the flaps
    with the throttle stick. Worked real well but the wings flutter too
    much to fly it regularly. New wing panels are in the building queue.