Setup tips for my first FH... Super-V 100

[tony w]

I would appreciate advice on some aspects of Setup for my Super-V 100, which is my first FH sailplane. I have all the functions on all the surfaces, but have a few questions. Specifically:

1. The flaps have limited up travel due to the bottom hinging. I am not going to start modifying the hinging to achieve higher up-throws.
2. Given the above, when I program full span TE ailerons, the down throws of the aileron and rudder match, but the up throw of the rudder is less than the aileron. I have a great deal of flexibility in programming this plane. should I:
a. Forget full-span ailerons?
b. keep it the way it is even though the flaps do not go as far up as the ailerons when they are used as ailerons?
c. Disable the upthrows of the flaps but keep the down throws since the control surfaces line up OK on the down throws?

I am hesitant to use option c. since this might just induce more adverse yaw????? Not sure about this one. I should point out that I do have aileron differential programmed in, as per the setup instructions of the manufacturer.

My other question relates to crow vs. full TE flaps. I am able to program both so I can easily switch from one to the other. The manufacturer states that the ailerons should come up .3 inches when using crow braking. They do not state what the down throw of the aileron should be for full TE flaps. Is there a general guideline for the total amount of down throw for the ailerons surfaces when used as full-span flaps? Is it the same as the upthrow used with crow?

Who likes crow vs. Full TE flaps?

If anyone is worried about loss of control authority with the ailerons used as flaps, I have taken care of that through two mechanisms. First, as the flaps come down, the aileron differential is gradually dialed out. Second, Once the flaps are halfway down, the rudder throws are increased to maintain control.

With full TE flaps you need some down elevator compensation. What kind of elevator compensation, if any, is required when using crow? Is it generally up or down, or is this just model dependent?

I'm sure that there are many ways to approach this. I would especially love to hear from anyone that had previously flown this plane and tried some different setups.

thanks very much,

Tony W

[jtlsf5]

I've had a SV100 for about 15 years.

Ailerons: differential is important. Start at about 75% and optimize from there

Flap-Aileron mixing: not needed, a certainly don't just use down flap and no up flap, this is wrong. Forget full span ailerons AND full span flaps.

Crow- nothing too complicated, at full flaps you want about .25" up aileron for stability. It isn't really crow, its aerodynamic washout when at full flaps.

Tail- you don't talk about the V-tail, so here are some tips. If your radio is capable, program reverse diff in the rudder portion of tail surfaces mix. This means the down going V should go down about 1.5-2 times as much as the up going V. This will create much smoother yaw response.

BTW, you don't say what radio you are using. I still have mine programmed to a Stylus and could supply the program to a memory card if you like. Haven't moved this plane to my 9303 or 12X yet.

JT

[tony w]

JT,

Just the feedback I was looking for. I have a Royal EVO radio and can easily program rudder differential into the mixes. I had not even considered that.

When launching, do you use only rudder to steer?

I assume to launch you went with the recommended camber on the entire TE? Has this worked well for you?

Does your "crow" require much elevator compensation?

thanks,
Tony

[tony w]

JT,
One other question. How many mm up and down do you use for thermal and speed configurations?
Tony

[target]

Tony-

You'll need to modify the mixer definitions so that you can input seperate up and down percentages of aileron throw into the flap, then you can get the up flap that is correct (with differential) and down flap that is correct, regardless of the servo geometry.

Actually, if you have the data cable, I have a whole file I can email you with my EVO's entire setup. One is for TD flying with a V-tail, so it has Launch, Ping, Camber, and Landing Flight Phases already in it....

PM me with your email/phone number this weekend, and I will try to help you out.

Target

[tony w]

Tony-

You'll need to modify the mixer definitions so that you can input seperate up and down percentages of aileron into the flap, then you can get the up flap that is correct (with differential) and down flap that is correct, regardless of the servo geometry.


Target

Target,

Thanks for the offer for the file. PM sent with E-mail.

Are you saying that you like full-span ailerons? I can never get the up flap throws to match with the ailerons because of the flap hinging, which only allow 1/4 inch of up throws on the flap surfaces. this is enough for reflex, but not enough to make them line up with the ailerons when turning.

Tony

[jtlsf5]

Tony,
Go with Target to get a base program in place, then we can help you with setup detail. I'm traveling and can't measure some of the items you asked about. If you are still interested this weekend, PM me and I'll be glad to pull the V out, pour some electrons into the battery, and take some measurements for you.

JT

[target]

Target,

Thanks for the offer for the file. PM sent with E-mail.

Are you saying that you like full-span ailerons? I can never get the up flap throws to match with the ailerons because of the flap hinging, which only allow 1/4 inch of up throws on the flap surfaces. this is enough for reflex, but not enough to make them line up with the ailerons when turning.

Tony


Hi Tony-

Do I detect previous power plane experiences?? Hehe. I won't hold that against you....

Nah, you don't need or want the flaps to copy the ailerons in throw 100%, just a 1/4" of flap up throw, and 3/16" of flap down throw(75% diff) will make the wing much more efficient. Think of it this way:
When rolling, the tips must travel much faster in the tangent direction than the mid-span, or the roots, right? So you'll need more reaction at the tips than the root, for the whole wing to be "rolling at the same rate". Subtlety is the key with sailplanes it seems.
In the program I have on my EVO, because the flap servos are subtrimmed with the arms favoring the down flap movement, I have usually about 40% of the aileron throw mixed to up flap, and usually only about 15-20% of the down aileron throw mixed to the flap. That gives me "differential flapperons", which is what you want, in approximately the same proportion that the ailerons have.....

I hope this helps you.
I come home Thursday night, and can email you the EVO file Friday sometime.
FIRST, make a file of your own setups and save that to the computer; then you can revert to yours if mine won't work for you.
Alternately, we can try to make adjustments to your program on the phone, but that might be a long conversation!

Regards,
Target