Buratinu Maxi 18000

After Hans-Juergen tested the Buratinu 2000 I designed middle wing parts to reduce the wingspan to 1800 mm.
Many thanks again Hans-Juergen, for printing and testing it for me!
This is way the Buratinu Maxi 1800 version was born
All photographs are taken by him, and of course the video as well.
Many thanks for that too!

All other needed parts can be downloaded from Buratinu 1000
The special thing about this version also is that all parts of the wing, i.e. W3 to W5 as well as the elevons are identical to the original Buratinu version which are included here:
https://www.thingiverse.com/thing:3047415
The wingend W6 is smaller. You must take it from the Buratinu Midi 1000
https://www.thingiverse.com/thing:4280142
Or in case you can print larger, you can take the parts from here:
https://www.thingiverse.com/thing:3857570
The Buratinu 1300 uses the same fuselage as the Buratinu Midi.
So you have to take it from here:
https://www.thingiverse.com/thing:4280142

This is his report.
I set the center of gravity determined by Florian, adjusted all rudders and off I went to the flying field this evening. A thick rain and thunderstorm front was already well visible and the wind freshened up slightly gusty. But the decision was now once made - the part had to be in the air!

And like on rails the Buratinu purred from the hand into its element. The first takeoff of an experimental flying machine could not have been more successful. The time was exactly enough for one flight before the weather finally changed.
I am highly satisfied and am already looking forward to a windless flight day to finish the fine adjustments (motor camber, propeller brake etc.). The center of gravity is very good at 191 mm. The weight of my Buratinu-1800 with a 3S/1500mAh battery is 1095 grams ready for takeoff.

I have attached a simple video of this first flight (thanks to my wife, who "sacrificed" herself for this and came with me to the field).

Specifications
airfoils: own design
wing span: 1800 mm
wing chord: 284/140 mm
CoG: 191 mm from rear edge of the fuselage
overall weight: 1095 g (PETG/LW PLA)
wing area: 40,2 dm²
wing loading: 27,2 g/dm²
motor: Extron 2220/12 1270 KV max 250W
folded propeller: 9 x 6"
battery: 1500 mAh 3S 40C
motor camber: -4.6° (long fuselage front version 205 mm)

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