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Scandera from EPP-Shape.de


Tilman Baumann

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Tilman Baumann

Recently I found the Scandera in a German glider magazine. I was intrigued by the price and started investigating.

So far I think this could be pretty damn good model. Especially for the price.

It is cut from pretty dense EPP and comes with lots of wood and carbon.

 

So a few days ago, with my bank account still liquid after my last paycheck, I got myself one.

I have not built anything yet, (except gluing the wing halves together) You can expect some updates over the next few days.

 

All information and the instructions are in German. So I will try to cover enough details to allow you to build one as well if you like.

 

2_0.jpg

 

Specifications:
Weight: about 750g (unballasted)
Wingspan: 1500 mm
Length: 640 mm

Kit contents:
Wing cores with spar cutout and negative shells from EPP RG30
Fuselage from EPP RG30
Profiled balsa aileron
Balsa for the rudder
Total 2m 8x6mm carbon fiber square tubing
Carbon fiber roving
6x6mm wing joiner steel
2x 1000x1, 5mm carbon rod
2x 100x2mm carbon rod

Balsa sheeting for the carbon rods

Balsa drag spars
Fibreglass control horns
Clevises
Instructions


Features:
Extremely robust due to EPP
Precise and dynamic flight behaviour
Precise cutouts spar with Carbon square tubes

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Tilman Baumann

Here is my plans for it:

 

Add ballast tube (If I can find ballast that will fit)

 

Instead of using spackle, I will coat the whole wing with a thin layer of gorilla glue and dab it down once it foams up to get a tough fine pored sandable surface.

 

Then wrap the wing in a layer of glass cloth and glue it down with a few layers of thinned goop.

(Or rather UV-6800 industrial glue - E-6000® is the non UV resistant version of that)

 

Plus one strip of kevlar over the leading edge. Can't use too much since the sheet I bought is quite heavy.

 

Ailerons and drag spars will be fibre glassed.

 

Receiver will be in the wing to reduce wiring mess.

 

Build in EasyJack (Similar to the blackjack system of NCFM)

 

Cover in 3M sticky foil.

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Oh look - an M60 - wonder if it goes as well as the original

they appear to do a Halfpipe as well

 

why not just cover it in laminating film as per the current fashion?

 

Phil.

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Tilman Baumann

Oh look - an M60 - wonder if it goes as well as the original

they appear to do a Halfpipe as well

 

Phil.

Funny you say that. Everyone including me was a bit sarcastic about that. Who likes a copy.

But the guy is adamant about having never seen a NCFM model before. He says every model designed for a purpose is bound to look similar.

That makes sense to me. :)

If it flies well (We will find out) I would say it could even be the better model.

The amount of carbon that guy adds for the price is pretty intense.

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Tilman Baumann

PS: The U-Turn Halfpipe lookalike has a pretty neat design feature too. The tail fin is slotted into a square carbon tube and held in with a magnet. So no problems ripping the fin off and no alignment problems.

 

That is so ingenious, I'm tempted to build something similar for the big one too.

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Ah one more thought.

They say to bottom hinge the ailerons.

I'm surprised about that. Isn't the top of the wing better smooth?

Advice to follow or ignore?

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Tilman Baumann

why not just cover it in laminating film as per the current fashion?

Mostly because I have done that already. :)

And it's not prefect. Especially around compound curves.

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Tilman Baumann

I should also add that I have done glass goop as well. And it creates a beautiful surface that is super though.

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Ah one more thought.

They say to bottom hinge the ailerons.

I'm surprised about that. Isn't the top of the wing better smooth?

Advice to follow or ignore?

I believe is because the air is thinner on the top surface, and probably is already turbulent by the time it gets to the ailerons .

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Tilman Baumann

I may have to change my mind on that gorilla glue surface treatment.

My test run turned out less smooth, less sandable and more brittle than I thought it would.

Maybe I get the foam saved smooth enough so that no ripples show through the glass later.

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Tilman Baumann

Wow, this is one tough wing.

The two square carbon spars make it incredibly strong.

 

I was a joy to build so far. But not without issues, some due to the not very clearly written build manual.

Some just SNAFUs like using to much gorilla glue and not finding my box cutters anywhere.

 

One thing confused me to no end is that I was missing the drag spars in this kit.

I had to actually contact the vendor to understand that he wants me to butt glue the triangular balsa stock right at the wing. And then cut the ailerons out from that 10mm shorter.

Clever solution. If I can get it cut all straight. But I could not figure that out from reading the manual.

 

Here some random build pictures.

 

You can see the unusual drag spar solution

 

Gorilla glue slurry. A cling film wrapped servo was pressed down on that for a snug fit.

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Tilman Baumann

They are not cut yet. If I put in some kevlar I would do it at the bottom.

Just pondering my options.

 

I don't like replacing my hinge tapes all the time.

 

I could laminate the kevlar strip at the bottom and then cut down on it. That would guarantee that if I glue the kevlar on nothing will seep into the gap. But sanding the gap would be quite interesting.

 

Or I glue the strip down later. Which would be doable I guess with the release agent I got from you. ;)

 

Or I go with traditional tape... :)

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