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Gliders with no D box leading edge?

What's the deal?

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Chuck Plains17/02/2019 19:44:52
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1096 forum posts
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I'm looking to by myself a pressie soon and it's going to be a nice big glider, preferably 3M or more. But although I like the idea of lightness, I'm puzzled by the designs on Topmodel.

Particularly their Albatross3.0 https://www.topmodelcz.cz/index.php?&desktop_back=eshop&action_back=&id_back=0&desktop=eshop&action=zbozi_detail&id=15450

Also the Enigma https://www.topmodelcz.cz/index.php?&desktop_back=eshop&action_back=&id_back=0&desktop=eshop&action=zbozi_detail&id=14820

The Thermic https://www.topmodelcz.cz/index.php?&desktop_back=eshop&action_back=&id_back=0&desktop=eshop&action=zbozi_detail&id=12418

And others of different sizes. They rely on just the ribs to shape the L/E, so leaving the covering to sink n a bit between each one. Yes I've seen videos of the models flying and that's ok, but there's nothing for comparison. Also, obviously a potential lack of robustness is something to be considered.

So, does anyone have experience with these models or similar wing designs?

Stearman6517/02/2019 19:58:59
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770 forum posts
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As an alternative, why not take a look at mine.

**LINK**

Former Member17/02/2019 20:44:19

[This posting has been removed]

Chuck Plains17/02/2019 22:24:41
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1096 forum posts
244 photos
Posted by Stearman65 on 17/02/2019 19:58:59:

As an alternative, why not take a look at mine.

**LINK**

Thanx, but I'm not into scale at the moment, and I'm in Exeter, so a 600 mile round trip would be out too. wink

Chuck Plains17/02/2019 22:44:57
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1096 forum posts
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Posted by Ikura on 17/02/2019 20:44:19:

All the Topmodel CZ designs fly extremely well and there is absolutely no problem with the carbon rod leading edge.

My Prelude and Marabu have the carbon rod leading edge and both fly beautifully.

If you want a D-Box built up wing look at their Elite. You can't go far wrong with a Topmodel CZ glider.

All the best.

Thanx for that info, I like the look of both of those, and love the transparent coloured covering, but I already have two 2.5m gliders, although I modified my Volantex ASW28 to 3.1mtrs, just for the hell of it. But I'm encouraged by what you've said, so I'll be choosing between either the Albatross the Element or the Fascination.

Former Member17/02/2019 22:51:14

[This posting has been removed]

Chuck Plains17/02/2019 23:02:02
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1096 forum posts
244 photos

There's also the Thermic.

Stearman6517/02/2019 23:14:23
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770 forum posts
893 photos
Posted by Chuck Plains on 17/02/2019 22:24:41:
Posted by Stearman65 on 17/02/2019 19:58:59:

As an alternative, why not take a look at mine.

**LINK**

Thanx, but I'm not into scale at the moment, and I'm in Exeter, so a 600 mile round trip would be out too. wink

No problem, worth a try?yes

Chuck Plains17/02/2019 23:32:18
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1096 forum posts
244 photos

Ouch! I've just noticed how expensive Topmodel's motors seem to be!!!!!

I'll probably fall back to Hobbyking then. blush Well anyway, I'm not into competitions or anything, as long as a glider gets up there I'm happy.

Peter Miller18/02/2019 08:19:23
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11780 forum posts
1416 photos
10 articles

Why not build my Easter Eagle SEnior? Dead simple, and boy, does it fly!

**LINK**

Has been flown in 20mph winds.

You can also see my build blog here

**LINK**

Chuck Plains18/02/2019 20:27:37
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1096 forum posts
244 photos

Thanx Peter, but I'm more in the way of looking for light wind performance this time, and I freely confess my love for high aspect wings. No surprise then that my favourite bird is the beautiful Wandering Albatross!

Wandering Albatross.jpg

Which I hope to model in foam one day. But I've never built any planes in balsa since I was a kid making chuck planes. wink

Edited By Chuck Plains on 18/02/2019 20:28:30

Peter Miller18/02/2019 21:10:37
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11780 forum posts
1416 photos
10 articles

The Easter Eagle senior is really intended for light winds. The fact taht the current owner has flown it in stong winds is purely bis slightly insane choice.

He actually used to fly Mystique glider. Now he has admitted that he never knew what a real glider could be like.

Today he made a 300 mile round trip for me to repair his standard EE.THat is how much he loves even that one.

Chuck Plains18/02/2019 21:25:03
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1096 forum posts
244 photos

Cool, I'm glad he's happy with your creation, but it's definitely not what I'm for right now. And I still want to spend what I'm calling "my xmas money" on something shiny and new. wink

Hmm, actually, I also need a TX with more than 6 channels too.

PatMc18/02/2019 21:39:31
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4526 forum posts
550 photos

How about the Introduction F5J (rudder, elevator, flaps & motor) or the Inside F5J (same plus 2 ailerons each wing), both have very light wing loading. Hyperflight also have the Inside in stock but are out of stock on the Introduction.

There are a couple of build blogs of them in RCG.

Chuck Plains18/02/2019 22:53:18
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1096 forum posts
244 photos

Ah, thanx but no, I'm definitely not into building balsa kits. I definitely see the positive side of it, what with it being economical and satisfying, but I don't have the patience. I may be 65, but I'm still working 5 days a week as a CNC machine setter, plus my tinnitus tends to piss me off more at home. Don't get me wrong, I have made stuff with foam wings including my 2.5mtr pod and boom scratcher and have what you might call "projects" that have kind of stalled for years. So anything that takes too long gets forgotten about. Oh, plus I seem to have a dust allergy.

David Hall 919/02/2019 10:04:22
318 forum posts
18 photos

I enjoy flying my 2.5m Topmodel Avia. It's open structure gave me some thought about its strength. Having flown it, dropped it into rough grass land, accidentally performed full power tight loops (note to self....never, ever fly after a low power range check without a power off/on cycle) and whacking my leg with the leading edge on landing ,,... I can say that it should not be a worry..

One useful aspect of the Topmodels that i have checked out is that the fuselages are of a bigger diameter than the full competition models that I fly against. Many of the serious models will only take a 28mm motor or motor/gearbox. The Topmodels (all I've seen) will take 35-37mm motors which allows a large range of cheap motors to be used...

Former Member19/02/2019 11:25:26

[This posting has been removed]

Chuck Plains07/03/2019 23:05:41
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1096 forum posts
244 photos

Eventually! Finally!!!

I decided on an Art Hobby Odyssey E 2.7, the cross tail version.

https://www.pp-rc.de/FLYING-MODELS/ART-HOBBY/ELECTRO-GLIDERS/Electric-powerde-glider-Odyssey-E-2-7m.htm?shop=pp-rc_en&SessionId=&a=article&ProdNr=1620&p=127

This one belongs to Sir Dumb Thumb on RC Groups

Odyssey 2.7E

Here's his build thread,

https://www.rcgroups.com/forums/showthread.php?2289862-Art-Hobby-Odyssey-EC-2-7M

I'll be building it up with just a basic 5 deg dihedral and full house controls.

Seems it can weigh in at about a kilo or less all up, so that's my aim, as my 2.5 scratch pod and boom is 1.5k.

So I'm sure that with it's proper airfoil and half a kilo less weight, this will be a proper Summer thermal floater.

Stearman6507/03/2019 23:22:50
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770 forum posts
893 photos

**LINK**

**LINK**

 

Edited By Stearman65 on 07/03/2019 23:26:55

Former Member08/03/2019 07:04:39
756 forum posts

[This posting has been removed]

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