I have been observing   that  there  are 3 major issues a newbie faces with a computerized radio :

1) Trimming out the plane on the first flight  in the case of a  good old fashioned radio is much easier as trim movement is physical and not digital
2) Trimming itself involves assignment of % which  a  a newbie knows little about
2) Servo reversal  involves  going into the menu  

A very experienced old time  Aero Modeler  from Chennai   made this observation initially  and  since then I have been looking at it and find it is has its merits .

So I thought may be others training newbies from other areas could also add  their experiences as well  on this as well as any other  points they feel.

The simple old way seems to be  better for the first radio.

Sai

Another common problem I have come across is the color coding of  wires  for the servo or ESC to receiver :

1) White   OR Yellow is the signal wire
2) Red  at the center is the Positive
3) Black or Brown  is the negative

Connection polarity on the receiver  is normally :

+ ve ( red )is the  Center pin in the receiver
right side of center +ve ( red)    is   -ve ( black or brown )
Left side of center +ve ( red )  is  signal ( white or yellow )

This is true in 99.99 case of receivers .

Please add exceptions .

Sai

Sai

How does one help define the "right" or "left" side. In the case of Futaba, there is a flange or key on the signal side. The "flat" side is negative.


From my experience, ALL positions are the same, except for the colour, as you have mentioned. One has to be careful if you are using JR or HiTec servos with Futaba, particularly.

Sushil ,
As I said it is valid in most cases and now a days with various types of servos available   not all come with the  slot  type futaba connectors  so I have  observed a simple method to determine the wires which has  worked well for me till date to even explain over the phone to newbies .

ie ( image attached )
take the  receiver and have 3 pins of each channel facing you then  fix the +ve as the center  then you have one pin to the right and one to the left  in each channel  then follow what I have mentioned above .

This has worked for me in most cases but there are exceptions .

Quotetake the  receiver and have 3 pins of each channel facing you then  fix the +ve as the center  then you have one pin to the right and one to the left  in each channel  then follow what I have mentioned above .

Sai, thanks. This is precisely what I was asking. A clear, unambiguous way, to define "right". Will surely help the ones who need it.

Sorry, I am getting old    

I cannot see how this removed the ambiguity.  What part of these instructions prevent the user from holding either the receiver 180degrees rotated from how it is shown in the picture, or rotating the servo connector 180 degrees ?

the problem me and my colleagues faced is:
we generally prefer scratchbuilding from biofoam. but the sheest in transport gets slightly curved, which creates a problem.. specially in rudder.
i ordered a big lot of biofoam frm ADPLAST Mumbai but to my disappointment all sheets are a bit curved. in fuselage we make it by stichking two like mirror images but wings and others where single layer of sheets are to be used are a big problem.. and rudder, where that curve is not symetric to the plane body, its very dif to trim.. whatever i do, plane alwas is not trimmed..
i think this issue cant be solved.. only is to use planar sheets.
if any one has some suggestion, pls share !!!

Quote from: anwar on January 14, 2010, 03:06:08 PM
Sorry, I am getting old  

I cannot see how this removed the ambiguity.  What part of these instructions prevent the user from holding either the receiver 180degrees rotated from how it is shown in the picture, or rotating the servo connector 180 degrees ?

Agreed , please add that the writing on the receiver should be  the rightway up and facing you or if the pins are on the side " GOD HELP YOU " .

I am not able to think   how to instruct on the pins .

But my description above works for at least around 70 % of the receivers i guess

Sai

Amir ,
I stick to Coro becuase of these problems with Bio foam

My Two paise worth of posting specifically for the Dx6i 2.4 GHz with color codes explained in this post

http://www.rcindia.org/beginners-zone/connecting-servo-to-receiver-and-binding/msg8982/#msg8982

regards
Pankaj