Here is a whoop cross 130 mm (axis to axis) in Polycarbonate and TPU Ultimaker. It was developed to be highly visible at night. It is equipped with : micro f4 20x20mm Motors brushless 1707 - 3900kv Propellers Lumenier 5040x4 cut to 70mm. Quad ESC 4 X 20A Racerstar It runs on 3S 850 mha or 4S 1000 mha Mini controleur F4 betaflight : http://www.banggood.com/fr/Mini-ACRO-F4-Betaflight-Flight-Controller-Buil-in-PDB-5V1A-BEC-with-Micro-Buzzer-p-1110441.html?p=LD020411878172015024 ESC 4X 20AMP Bheli S V2: http://www.banggood.com/fr/Racerstar-RS20Ax4-V2-20A-BB2-48MHz-Blheli_S-2-4S-Opto-Oneshot42-Multishot-4-in-1-ESC-for-FPV-Racer-p-1080541.html?p=LD020411878172015024 Receiver frsky: http://www.banggood.com/FD800-Tiny-Frsky-8CH-PPMSBUS-Receiver-Compatible-FRSKY-ACCST-X9DPlusDJTDFTDHT-For-QX95-QX90-p-1108071.html?p=LD020411878172015024 Brusheless 1707 3900kv: http://www.myrcmart.com/rcx-h1707-3900kv-micro-outrunner-brushless-motor-p-9434.html Small supply of screws: 16xM2 12 mm to fix the brushless on the support motors. 12xM1.6 + 12xM16 nut to fix the brushless supports to the chassis https://www.facebook.com/Microdure/