This airplane from Horizon Hobby does not require you do do any assembly before driving it. Thanks to the LiPo battery you get the most out of it.
From Appliance Electronics
UMX Twin Otter BNF Basic with AS3X and SAFE Select
eModels
E-flite UMX Twin Otter BNF Basic with AS3X and SAFE Select # EFLU30050
Model Bau
E-Flite UMX Twin Otter BNF Basic with AS3X and SAFE Select A-E-FliteU30050 A-EFLU30050 A-EFLU30050