Buratinu Maxi 1600

After Hans-Juergen tested the Buratinu 1300 I designed middle wing parts to expand the wingspan to 1600 mm.
Many thanks again Hans-Juergen, for printing and testing it for me!
This is way the Buratinu 1600 version was born ;)

https://youtu.be/ne5Z_o-d_dA



https://www.youtube.com/watch?v=Ck2mCP60_R4



This is his detailed report
-START-
Weather conditions during testing:
Morning from 10 am, temperature about 6-8 degrees, cloudless sky, weak wind from NW with maximum 5 km/h and negligible thermals.
The results are quite interesting, but in the end had almost been expected.
The (safe) center of gravity is actually 190 mm measured from the end of the fuselage. I had to add 20 grams of lead at the height of the front cover under the fuselage to keep the center of gravity because of additionally installed cables and telemetry sensors. The takeoff weight is thus 870 grams, the wing loading about 26 g/sqm.
I changed the motor and mounted an Extron 2217/16 (KV 1140, 28 mm