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Radian, r/e or with ailerons

Old 10-12-2011, 07:35 AM
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da Rock
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Default Radian, r/e or with ailerons

A flying buddy has been watching a couple of us fly gliders at the club field and started looking at what ARFs are available. He saw a Radian fly at another field and was impressed. However, he's leaning toward the aileron one "because it ought to fly better".

I've got no experience with either one. So all I could offer was a guess the ailerons can't possibly make that thing fly better, 'cause there ain't much "better" left to get.

Anybody with actual experience got a suggestion?
Old 10-12-2011, 07:43 AM
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Default RE: Radian, r/e or with ailerons

Better is a matter of preference.

I prefered the aileron version but I'm used to "full house" sailplanes (see my review) but it also comes with flaps which help getting into tighter landing areas and breaking out of lift if the thing starts to go out of sight.

You can also crack the flaps to improve lift and do some other cool stuff if you have a decent radio.

It's also heavier so if your only objective was to fly light lift then it may indeed fly "worse".
Old 10-12-2011, 07:51 AM
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Default RE: Radian, r/e or with ailerons

These are not quite ARFs but for higher performance they are very quick builds. With sheeted wings, glass fuse, carbon tail booms and precut and hinged tail feathers you can put these together in a few hours. I own a few and the performance with the right motor can be out of this world. http://www.arthobby.com/

Dennis
Old 10-12-2011, 08:59 AM
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Default RE: Radian, r/e or with ailerons

Given a choice of only the two Radians, I'd go for the simplier and lighter original (no ailerons). I witnessed Dave Garwood defeat a field of RES sailplanes in a timed limited motor run event earlier this summer with the original Radian, and he also has the aileron version.

As Propworn and BarracudaHockey each said, the performances really aren't that much different between these 2 planes, and the only real discriminator is being able to land in a tighter spot with the "full house" version. Still, neither is very fast or efficient compared with the universe of choices available.

If this is your first "full house" sailplane, it might be fun to experiment, but I also think you'd realize a better range of performance with something cleaner if exploring different flight (speed) regimes was your prime goal.

You might also consider the Multiplex cularis, which is another "full house" bird of the same ilk.

A friend has one of the 2.5m Orions from Arthobby, and he really likes it. That is an excellent suggestion.

Or if you can spend some more, one could choose a glass/composite bird from F3X or Soaring USA in the 2 or 2.5M size.

In any case as long as you don't go nuts with the power (which really gives you crazy fast climbs) you can get a whole lot of performance with a better cleaner big wing for not too much money.
Old 10-14-2011, 10:54 AM
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Default RE: Radian, r/e or with ailerons

Define "fly better".

Does he mean that he will have more control of the roll with the ailerons? YES

More precision contol on landing with the flaps? Yes

Better thermal performance? Probably not.

If you want a thermal hunter for light to moderate wind conditions that will float on mouse farts? = the Radian

If you want a heavier plane with full camber control for stronger lift conditions that will be better in the wind? =Radian Pro.


This is from a post I did on this topic on another forum. Got a LOT of discussion. Radian would be Light with the Radian Pro as Legs in this case. That is not to say that the Pro is a heavy plane, it is just heavier than the Radian by25-30%.


Light vs. Legs? Simplicity vs. Complexity?


OK, guys, how about this. What is your contest strategy when it comes to
planes? Today we have the two plane rule that allows a pilot to switch
planes freely during a contest. That expands your options when you are
considering what kinds of planes you build or buy. It also gives you
options on a day to day and round to round basis. What are your thoughts?

Light - looking at the more competitive gliders we see a lot of very very
light RES planes showing up at contests, flying in the unlimited class.
These are 2.5 - 3.5M birds with wing loadings frequently under 6 ounces.
They launch hard, fly slow and seem to defy gravity. The spoilers are very
effective and they are built strong enough to take hard contest landings.
The AVA, Topaz, Soprano and the Bubble Dancer would be typical of this
group.

Simple - In addition, because they are simpler planes with no trailing edge
controls, they also produce a lighter pilot load. Their lightly loaded
bent wings are good lift indicators. They also make them extremely stable
giving the pilot more freedom to scan the skies with less concern about the
attitude of the plane or which switches have been thrown. This stability
also makes them much easier to fly at long range. And finally you can
typically use a simpler radio for these planes. Spoiler to elevator is
likely to be the only mixing you would need for these RES planes.

Most can be ballasted into the 8-9 oz wing loading range giving them wind
tolerance or the ability to run out farther and faster then when they are at
their lightest weights. They don't get the legs of a full house higher wing
loading, camber controlled ship, but they can face some wind or run faster
when the pilot deems that the best approach.

Legs - Typically I am thinking of full house planes in the 2.5 to 3.7M range
that carry wing loads of 8-11 oz. More control, more flexibility and able
to range out farther and faster because those higher wing loadings and
modern air foils give them the legs to do it. However they can't float
like the light RES planes. The Supra, Thermal Dancer, Graphites, Organic,
Pikes, Sharon, Icon, Aegea and a host of others are good examples.
Complexity - To take advantage of that flexibility you add complexity to the
flight in the form of camber changes, trim changes and the like. You will
also want a more flexible radio in order to manage all those trim options
during the flight. It is easier to make a mistake such as flying through
sink with your thermal camber setting on. This increases pilot load,
perhaps taking some time and attention away from reading the air. And their
flatter wings make them less stable requiring more attention when flying at
great distances.
When the wind comes up many of these planes can take on very high ballast
loads making them strong contenders in the wind. That extra weight also
makes them hotter at the landing tapes, able to punch through the wind but
requiring more breaking to slow down for the landing.
Two plane rule -

Do you choose a single type of plane and have that for your primarily and
back-up/alternate plane, or do you choose to have one of each?
Assuming you have both types, do you choose one plane on a "conditions
today" and stick with it? Or, do you choose on a round by round basis,
judging which would be good for the type of air you see.

What recommendation would you make to a new pilot looking for his first
contest ship? Light and simple or Legs with complexity?
Old 10-14-2011, 01:16 PM
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Default RE: Radian, r/e or with ailerons

Good post Ed.

One first needs to define the job before selecting the most appropriate tool. Usually "better" means different things to different people.

Ever see this:

http://vimeo.com/18860450

Sometimes "better" just comes down to being the color "red."
Old 10-14-2011, 02:31 PM
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Default RE: Radian, r/e or with ailerons

Yes I have seen that many times, but it was great to see it again!
Old 10-14-2011, 05:15 PM
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Default RE: Radian, r/e or with ailerons

Good stuff Ed
Old 03-03-2012, 09:17 PM
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Default RE: Radian, r/e or with ailerons

Hello guys and maybe gals. I am looking for someone to help me set up my Radian Pro please? I have the AR6200 reciver and a DX7 radio any help would be great as I want to do all the things it says it can do. I been flying the reg Radian for over two years now. If someone could just show me how they hooked it up and the mixing that would be great photos maybe? You can reach me at [email protected]
Old 03-04-2012, 05:25 AM
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Default RE: Radian, r/e or with ailerons

http://www.rcuniverse.com/magazine/a...rticle_id=1326

There's the review.

In the radio setup section it has a link to the DX7 setup
Old 03-04-2012, 11:35 AM
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Default RE: Radian, r/e or with ailerons

Thank you very much very very helpful. That is just what I needed thanks Do you fly the Radian pro? I have had the older model for two years now and I love to get her way up in the air and grab a chair and sit a fly for a hour or so. What do you think about the two of them? Thanks for your time and the links. Eric
Old 03-05-2012, 09:08 AM
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Default RE: Radian, r/e or with ailerons

I flew it quite a bit but someone harped on me every time I took it out of the truck to buy it, and the problem with doing reviews, if you keep everyone you like, you don't have room in the house any more.

It went to a good friend of mine though so I get to fly it when I want and really like it. We have several of both at our field and someon spanked my full house composite and very expensive 2M ship in a 15 second LMR contest with a stock original Radian so they definately thermal well.

Like I said in the article, its hard to beat the "pull it out, plug it up, and go fly" simplicity of either of the Radians.
Old 03-05-2012, 10:31 AM
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Default RE: Radian, r/e or with ailerons

Thank you for all the help. May I shoot you a message if I run into trouble setting her up?

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