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Hi-Performance and Sailplanes RC hotliners, electric pylon racers, F5B, F5D, sailplanes and gliders

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Old 07-03-2016, 02:17 AM   #26
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Originally Posted by Fishbonez View Post
Great pic. I think I see one of these in my future. What size battery are you using? Any bad tendancies that you noticed?

3s 3300, and none.

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Old 07-03-2016, 03:57 AM   #27
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I have read that people have noticed a lot of "flex" in the tail and have tried to stiffen it. Did you notice the same problem?

Happy flying may your crashes be limited and if they are not limited let them be cool.
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Old 07-03-2016, 04:03 AM   #28
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Nothing more than you would expect for a REALLY big foamie.

It is nothing that will affect flight characteristics. It is Glider after all. Now if it were a 150mph Hotliner I would be concerned.

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Old 07-03-2016, 04:41 AM   #29
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You got me thinking Bill.
I just got home from a session with my Radian fitted with RTH and stability etc and I have it all working perfectly now. I turned my TX off a couple of times when the glider was quite some distance away and it just automatically turned for home and eventually it was circling away above me and I thought to myself, Now what could be better than this? And then I thought, I Know. A Radian XL with RTH. Damn. That will take me a while to save for that.
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Old 07-07-2016, 09:58 PM   #30
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I am an ALES competition pilot. While I don't expect the Radian XL to be a top performer I am always interested in what it would take to get it to climb to 200 meters in 30 seconds or less.

Can this be done with a prop change alone?

Has anyone timed the climb or tried it with an ALES cut-off device?

I have read that it can't do it stock. But neither could the original Radian. On that one all we had to do was change the prop and it hit 200 meters in 28 seconds or less.

So, anyone experimenting with the XL?

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Old 03-30-2017, 05:56 AM   #31
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Default Ok Bill, you talked me into it! ;-)

Picked it up at the hobby shop this evening. Took my time going through the manual making sure I didn't miss anything. Pretty simple and quick to assemble. I got the PNP version and have a Spektrum receiver with satellite in it but haven't powered it up yet. Battery is on the way. Maybe by the weekend...


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Old 03-30-2017, 01:50 PM   #32
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Originally Posted by MustangMan View Post
Picked it up at the hobby shop this evening. Took my time going through the manual making sure I didn't miss anything. Pretty simple and quick to assemble. I got the PNP version and have a Spektrum receiver with satellite in it but haven't powered it up yet. Battery is on the way. Maybe by the weekend...
You are going to like it! I am still loving mine.

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Old 04-03-2017, 05:30 PM   #33
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I've had it in the air once, late in the day when there was basically no lift, just to get a little used to flying it and to get it trimmed. Unfortunately it was a little squirrely and when I inspected it closely after landing realized the fuselage has a twist in it so that the tail isn't properly aligned with the plane of the main wing.

I plan to call Horizon and see what they suggest. I saw the bulletins but mine has the sticker on the box indicated that they've already taken care of those. If they hadn't already glued the fuselage to the carbon tube it would be easy to get right. It's obviously glued to the carbon tube however since it resisted all reasonable attempts to twist it to correct alignment.
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Old 04-03-2017, 07:30 PM   #34
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bummer. I was fortunate that mine did not have that issue

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Old 04-03-2017, 07:34 PM   #35
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It's not terrible, but I'd like to figure out how to straighten it. Just moments ago I sent an email, with photos to Horizon support. We'll see what they say.


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Old 10-06-2017, 06:30 PM   #36
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We have several Radian XLs at our field. The pilots seem to like them, but DON'T dive them. At high speeds they wings flutter. We have had two crashes were the dove the plane and the wings separated as a result of flutter.

Pop the spoilers and bring it down easy. Or put the stick in the lower left or right corner and spiral down without picking up a lot of speed.

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Old 03-19-2018, 12:32 AM   #37
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Howdy folks,

New here to the scalesoaring forum. I fly the Parkzone KA8, Radian XL, and am currently working on a TopModel Marabu. Just getting into soaring but I have been loving every moment of it, in an odd way it reminds me of sailing with Dad on a hobie 16 we refurbed.

Tangent over

I've been really enjoying the XL, however as many of you have commented its a heavy piece of foam. One area that I found to save some weight is the yellow fiberglass wing joiners supplied with the kit. They weigh in at around 130 grams according to my somewhat-accurate scale.

Over the past couple of months I've been experimenting with carbon fiber wing joiners. All four of them weigh in at ~40 grams (my scale is only in five gram increments) so they save around 90 grams worth of weight total off of the plane. This weight saving is also decently far out on the wings, so it has made my radian more roll sensitive in terms of detecting thermals and other little bubbles.

I've made them out of two sheets of 0.5mm carbon fiber which sandwich 3mm epp foam. This makes them just slightly thicker than the stock heavy fiberglass joiners, so as a result they fit snugly in the wings. Interestingly, I have had no need to use the wing screws with my plane as the joiners keep them together really nice, so that saves a step and is one less thing to forget on the way to the field.

I've got the process down to where it takes around two hours for me to complete each set. I couple local guys have asked me to make some for them along with some folks on another forum, so I figured I'd jump in here and see what you all thought. More info can be found at my website, AvemRC.com. Click on 'Upgrades' towards the upper-left of your screen.

Anyways thanks for the read and I've love to hear of other ideas to really maximize the performance out of this plane!!

Cheers!!

-Jared


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Old 03-19-2018, 01:34 PM   #38
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Cool mod. Love to see all the different things folks do to modify their birds.

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Old 03-19-2018, 05:13 PM   #39
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Thanks!! The XL is a great value
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Old 03-19-2018, 05:17 PM   #40
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Originally Posted by Nixus View Post
Thanks!! The XL is a great value
Yeah I enjoy mine a lot.

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