How do you set up a bipe with 4 ailerons. I will be using a 9CAP

Are you using four servos?

assuming 4 servos...

slave all the ailerons off the main one, using 3 custom mixes. or use 2 y-harnesses if you don't want the programming issues. (but lots of cool features if you do program it! instant speed brakes, send one set of ailerons up and one down. or move just one set up or down for flaps/spoilers. )

This is an interesting subject that I'm also pondering on. I'm starting on my GP Christen Eagle II and really would like to Y-connect left-to-left and right-to-right and setup flaperons but that would mean servo wires need to be run down the side of the wing struts with connect/disconnect. Question is, is it worth the presence of the ugly wires to have this enhanced flight envelope?

BTW, I'm also running with the Futaba 9C so have the capability of enhanced mixings.

I think that the answer to using four or two servos lays firstly in the size of the ailerons. On bipes such as the original CGM Ulitmate, servos on the bottom wing with GOOD linkages between the top and bottom ailerons work wonderfully. This is the way most full size bipes are confirgured and works very well. This does eliminate the wires coming out of the top wing running down the cabanes. With larger ailerons such as the DP Ultimate or the DV, four servos are a better choice. Tape the connectors to the inside of the cabanes and you will never really notice them at all.

For the advanced radios, you can use either Y harness methods or individual programmability and wire each in a separate channel. The Y harness keeps it simple using two channels and is my prefered method ofering differential throw, 3D trick set-ups and, or course, standard ailerons.

The individual programmability using four channels gives potential flight options (reflexive airbraking or differential throw between top wing and bottom wing ailerons) that MOST will never use or understand BUT it does provide easy fine adjustments to each aileron's subtrim position on the radio without changing the mechanics.

Either option still requires good and correct mechanical set-up to ensure no unwanted reflex or proflex that cause differential drag are present in the ailerons to keep the amount of needed subtrim to a minimum.

Mark

mark do you have any pics of this set up? with four ailerons with Y harness.

If your'e not going to use flaperons or spoilerons, use a Matchbox into the aileron channel on your Rx. Allows for setting throws on all four servos individually.

I would "Y" the two left wings on CH1 and the two right wings on CH6

I fly bipes all the time and when using 4 aileron servos I use two matchboxes to ease the set up and save programming functions at the transmitter for other uses. The right wing will plug the matchbox into the aileron channel and have two servos plugged into the matchbox.

The left wing will have a matchbox plugged into aux 1 or channel 5, and have two servos plugged into the matchbox. If you are really into some very exotic mixes, then you may want to use multiple mixes and separate channels for each servo. Using "Y" harnesses limits your ability to match up the upper and lower aileron for each wing.

Here's were the benefit of the Hitec digitals with their programmer comes into play.

Initially, I plan on y-connecting the 2 right servos and plug it into channel 1. I will also y-connect the 2 left servos and plug it into channel 6. I will then activate FLAPERON on my Futaba 9C. The split elevator will be using channels 2 & 8 and I will then activate the AILEVATOR on my 9C.

I will use the Hitec programmer to match the servos.

I use a 9cap with my goldberg bipe. I only just started playing with it last fall with two servos and slaved the upper alerons with a mechanical linkage. I wanted flaperons to slow up the landing speed a bit. It works well but it appears to have so much aleron surface that if you hit the flaps the plane turns toward the ground. Oppisite if you hit the spoileron. I need to compensate with more elevator and i think it will be ok. Just surprised me, the big stick always got a little up lift when i hit the flaps instead of nosing over.