i was working with a y connector which i was provided by authorities at iit kanpur, but i lost it and am left with 4 servos and nothing to connect. please check the pics and give your valuable suggestions. 

Hello,
I hope this is the plane that was built during BEIA Workshop  held at IIT-K. I was also there. It seems you are facing problems in connecting 4 servos without Y connector...

Its quite simple. just connect the servo for rudder on channel 4 of receiver, servo for elevator on channel 2, the ESC to channel 3, and ailerons that is one servo on channel 1 and the other on channel 6 of your receiver. you will need to program it through your transmitter.

ya exactly, its beia stuff... and how to program it please?

Which radio do you have?

avionic rcb6i

Yes, you can connect both aileron servos separately to the receiver and then program your radio for them to work together.
If your servo wires are not reaching, you can get servo extension wires like these:
http://thehobbyshop.in/index.php?main_page=product_info&products_id=212

If you want a Y-Splitter (Because you don't want to do the programming on your radio) You can get the extension wires and refer to this:


This cable is for Futaba radio systems so the plug has an extra tab on it (You can use it by cutting off the tab):
http://www.rcskyhobby.com/products.php?prd_id=478&main_page=products

Also if you are willing to order from HobbyKing:
http://hobbyking.com/hobbyking/store/__9690__JR_Y_Servo_Lead_30CM_Length_5pcs_bag_.html

Programming changes from radio to radio. You can check the manual of the radio.
Otherwise I'm sure many members on this forum who have that radio will be able to help you out.

This video shows the mixing procedure


You want the Flaperon mix which displays as 1-6 in the Mix menu

this radio is from Rcbazaar i guess. It has a feature of aileron mixing saved in it. you just need to search for it in the manual. they have saved a setting in it for channel 1 and channel 6 as ailerons. I had seen this feature in this. search for it in the manual.

otherwise you could place an order from:
http://www.rcbazaar.com/products/1197-jr-y-connectors-10-cm-22awg.aspx

check page no. 20 of the manual.

Just connect same coloured wires of two servo and connect in any one channel.
Servo's have three terminals, +ve, -ve and signal.
Servos works on the pulse width (1ms to 2ms spaced by 20ms). 1ms=0^O and 2ms = 240^O
So, if you can make solder joints, just cut one servo lead, extend with wires so that you can connect it to receiver, and now cut the second servo lead wire and extend it to solder joint of the first servo and connect electrically.
Always keep in mind that in any case, if any +ve and -ve wires connected (or joint connects), it will short circuit the BEC inside the ESC and the ESC will damage.
Now keep in mind that when you are connect two servo with y connector or direct wire and use it in one channel, you cannot use the aileron as flap. In fact single channel will just make one aileron up and another down while in flaps both up or down simultaniously. So using same servo in diff.operation and same operation needs mixing and requires separate channel signal.
How same channel (or similar movement) make differential movement (one push and another pull) is achieved with servo horn placement (one left and another right) is shown in the picture below. It's very simple.