Something's that bothered me for long time now is the proper identification for the Houthi Rujum UAV. whilst it's obviously a modified commercial, the one I've named until now, Yangda's YD6-1000S, didn't have the right shape for the arms, nor the right attachment point for them.
A lot of searching later, I think I've got it now, Longyi Aviation's LY-866. Everything just matches much better, except for the colour scheme, two red arms and four white, which all 3 'Rujum' UAVs lost by the Houthis seem to have had.
Whilst I couldn't find a picture of a LY-866 with this colour scheme, I did find one of its slightly smaller variant the LY-866S. (Span without propellors is 1.6 metres for 866, 1.25 for 866S) Therefore I find it likely the LY-866 also exists with this colour arrangement.
I've also considered the 'Rujum' being the LY-866S, but the shape just matches the 866 slightly better. Most prominently to me is that the length of middle part of the arm is significantly shorter in comparison with the orther parts for the 866S, but not the 866.
Bit of an example here. The length of the coloured lines is the distance from the bodywork to the end of the first sloped section. Pic 1: LY-866, 2: LY-866ST (tethered version of 866S) 3: Rujum
Some additional pics of the LY-866. This took me way too long.
Time for my monthly #Yemen UAV roundup for August 2021. As always claimed means no visual confirmation.
1st - A Qasef is downed in Rabaha district, south Marib
2nd - Houthi forces shoot down a large quadcopter described as a reconnaissance drone in Hudaydah governorate. It's actually modified to drop 120mm mortal shells.
3rd - A Rased modified to drop 60mm mortar shells crashes north of Al-Jah, Hudaydah governorate.
4th - Saudis claim downing a bomb-laden UAV towards Khamis Mushait.