Radios
 

What would be the minimal radio I would need to be able to have a rudder with 2 servos and have the mixing capabilites to have them move correctly...is there an actual term for this mix.

RE: Radios
 

Usually it's the elevator, not the rudder so much, that gets featured as "dual elevators" to allow individual trimming of each servo and to negate the necessity of a y-harness. Rudders are usually a single control surface on most planes, where a lot of mid-to-large aerobatic models have split elevator halves.

RE: Radios
 

ahh i lived in Calhoun and contracted all over N. GA up till 96 :) but on to the subject at hand........

allot of larger planes have duel servos on the rudder, my 1/4 scale Extra is setup that way, a Y-harness is NOT the way to set it up correctly, you either need at least one extra channel on your TX to mix rudder to in order to have the two servos freely able to be adjusted via the TX, this type setup works but takes a good bit of time to get the geometry right so the servos do not fight one another anywhere in their travel from stop to stop.

a match box/power box works great for this application and is the preferred method, you can then individually set each endpoint (both stick deflections) and the center points and the box memorizes these settings and controls them so you only use one channel out of your TX so with the box's you can get by on a giant scale with a 4 ch TX system.

kc

RE: Radios
 

I was meaning elevators...sorry am tired and not saying what I mean...I KC I know a guy married to a girl from Enterprise but I was off at college in 93-98

RE: Radios
 

Well, the term "dual elevators" is used in the feature descriptions of both the Futaba 9C and the Airtronics RD8000. The Futaba 7C does not have this feature (ask me how I know), and I didn't see it listed in the feature description of the Hitec Eclipse 7, either.

In the JR lineup, you have to go up to the 9303 radio system, although it boasts dual channel funtionality for "all primary control surfaces" so you could run dual servos on the elevator, rudder, and ailerons if you wanted to.

If you want a full featured radio that will support dual elevators, the Airtronics RD8000 is the best value at about $250 through Tower Hobbies after discounts while the JR 9303 is the most feature packed. The JR 9303 and the Futaba 9C are a pretty close match at the $499 price point, with both available as synthesized frequency systems with synthesized PCM receivers included. The JR seems to boast a few extra bells and whistles, but I can't really imagine being unhappy with either radio system.

The RD8000 is no slouch though. For $250, it's easily one of the best values in the whole marketplace for an advanced radio system.

RE: Radios
 

You probably know this, but setting up the rudder with pull-pull cable system and one good servo will give you the benefit of adjustments for each direction in addition to that of the rudder movement. And it is more 'positive' in control... more reactive. I can definitely feel the difference in the rudder action using pull-pull.

I've used vinyl coated kevlar cord instead of steel wire to get that metal away from the receiver antenna and it saves a gram or two of weight.

RE: Radios
 

You can do this with a basic 4-channel radio.

JR sells many of their servos in regular and "Reverse" And they will work with any brand of radio.

RE: Radios
 

If I were to begin again from scratch when buying a radio, I would buy the most radio I could afford. I'm currently flying with a Hitec Eclipse 7 (have two of them actually), but I really like the Futaba 9cap due to more model memory, slider switches and assignable switches. I'm sure that radio would support a dual elevator/rudder setup. Might want to also look at the upper end JR radios.

RE: Radios
 

To each his own, personally, All of those gizmos and gadgets get in the way of my flying.

I have no problem flying with a basic 4-channel radio.

I prefer a basic 6-channel computer radio. A few nice functions, a few different models, and a few mixes. Beyond that, It's just more than I want to deal with.

It's like... I used to have a no-frills telephone and an answering machine. Now I have a phone that has so many functions I'm afraid to pick it up anymore for fear of screwing up one of the settings. I don't even KNOW what all it can do - and I don't CARE! All I want to do is make a friggin' Phone Call! Why do I need so much BS on my telephone??? My wife, on the other hand, practically LIVES on the telephone and she likes all that BS.

So as I say - To each, his own

PS, I have my own "basic" phone downstairs in MANLAND :D

RE: Radios
 

your basic 4 & 6 channels are fine for your basic 4-6 channel planes, but when you get up to high end jets those extra 4 or 5 channels come in Very handy and even on a 4ch trainer plane I've not found those other gizmos and gadgets getting in my way.

kc

RE: Radios
 

If you just want to have two elevator servos, then any radio and a Y cable will work. If you want to have each servo on its own channel and be able to have them follow the ailerons, as alivators, then you will need a radio with this mixing. The Futaba 9C definately has this. More expensive systems have it too. The JR 9303 and the Royal EVO 9 would also be worth a look.