Hey guys I've only been at this for a short while and I'm a decent pilot but still have a looooong way to go. What's the best way to learn about expo and mixing or just overall computerized tx info. Why and when would I use expo? I have a dx7s and a dx6i. I mostly fly micros but I also fly little helis inside.

Thanks
Mike

Originally Posted by kilabean

Hey guys I've only been at this for a short while and I'm a decent pilot but still have a looooong way to go. What's the best way to learn about expo and mixing or just overall computerized tx info. Why and when would I use expo? I have a dx7s and a dx6i. I mostly fly micros but I also fly little helis inside.

Thanks
Mike

Start by ignoring the radio and thinking about the model. What you need is precise but adequate control -- which tend to impose opposite requirements. A combination of D/R and expo enables you to have the best of both worlds -- soft (low rate) control to give precision for certain flight regimes, such as level flight and landing, and quick (high rate) control for rapid rolls and even 3D. Dual or triple rate selects the basic response, expo tunes it so you can have both low and high available without switching. Control response really matters when it comes to good flying!

I think you should learn to use the transmitter a step at a time. Initially, you learn to set up the model mechanically and to use throw and subtrim to fine tune. Also to apply DR and expo for control response. Mixing probably comes later unless you have a specific need such as elevons or aileron differential.

I don't believe in doing a lot of detailed learning till you need to. Get the basics sorted out first. But take the trouble to understand what the other capabilities are for, so you know what your transmitter can do (and how much more the 7s can do than the 6i) for when you do need it.

Then be prepared to invest some time in understanding the features when you need them. The night before the maiden flight is not the time to be figuring out a complicated dual aileron, dual elevator setup!

By the way, they requirements of helicopters can be quite different from fixed wing. For example, some micros like to have opposite expo on the swash (what Spektrum calls negative and Futaba calls positive!) to increase the sensitivity around the middle, exactly what you don't want normally for fixed wing.

Originally Posted by kilabean;25068975[SIZE="1"

] Hey guys I've only been at this for a short while and I'm a decent pilot but still have a looooong way to go. What's the best way to learn about expo and mixing or just overall computerized tx info. Why and when would I use expo? I have a dx7s and a dx6i. I mostly fly micros but I also fly little helis inside. Thanks Mike [/SIZE]

Post #2 + 1, see also:

. EPA, ATV, Dual & Triple Rates, Expo Differences & Caution includes ESC / BEC Set Up.
. Understanding your RC System - Algorithm for Exponential curve in RC.
. Hitec Aurora 9 Radio Videos
a good video on setting up the Aurora 9 shows on screen displays:
#16. Model Menus Part 2 (92 Megs)
. Exponential
. Conditon C & S
. Dual Rates
. OST.

Much more information below
"FAQ = Answers for Beginners and Advanced RC'ers"
and
"Radio Systems, Accessories, Alterations and FAQ" at
Alan's Hobby, Model & RC FAQ Web Links

Alan T.

Go with Daedalus. Stay with default or recommended settings and change the settings as you go. You can try settings up at the start, but then, without the experience, you wouldn't know what a proper setup is.

Anyway, if you're going to experiment, start with 70% rate and +30 exponential. However, rate and expo are like trainers meant to make your heli's docile. Your goal is to work your way up to 100% rate and 0 exponential to get the full agility of your helicopter. Start by slowly increasing your rate from 70% to 100%, and once you're comfortable with that, you can begin reducing your expo from +30 to zero.

The D/R switch is there so you can switch between values, you can go 70% on liftoff, and then switch to 100% once you're in the air, then when you're going to land, go into a hover and switch back to 70% to make the heli less twitchy during the critical landing.

+1 on that.

100% high rate and 70% low rate, with about 30% expo on both is a good starting point for fixed wing too.

Some of the micro BNF models come with recommended settings for Spektrum transmitters, which helps a lot.

Always read the required maximum throws and set up the model mechanically to get as close as you can. You can dial down the throws at the transmitter but you lose resolution (assuming you've got decent linkages to use it).

For most purposes, avoid using more than 100% throw, as the servo arms get to extreme angles that make for none linear action.

Thanks a lot all for the response. Let me start by saying I'm very good at flying my champ. Jumping over to 4 channel was less then stellar but I'm getting it. T-28 was easy transition but the carbon cub is hard as hell to fly. I haven't crashed it yet amazingly.With me the carbon cub looks more like a crow having a seizure mid flight then a plane flying. I practice a lot on the phoenix 4 sim but that's less like real life. When I snap roll in the sim it looks okay.. when I try to roll outside the plane climbs then dips and spasms a bit (using rudder in both) I'm probably getting ahead of myself here in what I'm capable of but I'd like to learn about how to use expo to further my skills in the roll department. I can fly inverted, loops and stalls. I guess I was looking for someone to point me towards a tutorial that would explain how to set expo and what the outcome would be. Again like you guys said I'm probably getting ahead of myself here.

Thanks if you even made it this far!
Mike

If you want to fly aerobatics better, you should probably use a better aerobatic model than a Champ.

Next step up might be a T-28, or maybe the new Apprentice http://www.horizonhobby.com/products...nology-EFL3100

Andy

It sounds like you are not associated with any club or flying group - that would help a lot if you connect up with some fellow fliers.

Scott