Best bldc motors to use for a 1,5 kg DIY aerial photography drone

Hello everyone,

I am building an aerial photography drone. I will be using it for surveying and mapping purposes thus i need a big battery for an optimal flight time. According to my estimations, the quad will be around 1,5 kg (battery and motors included in the estimation) and there is a possibility of up to 1 kg payload. So its going to be approximately 2 to 2,5 kilograms.

I want to keep a thrust to weight ratio of 3:1 or 4:1 (excluding the payload). I will be using a 450mm frame, i don't want it to be too big so it will be easier to carry around. I am currently looking for a prop / motor combo that will fit this design. Does anyone have suggestions?

Thank you!

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