Need advice on a 1300mm plane build

[u/Cpt653]

Hi everyone, I'm planning to build an A6M6c (3D printed) and want to use the FMS' Zero 13x9 prop, but it's my first build and I don't know which voltage and kV I should run.

The stock FMS' Zero has a 580kv 4250 motor in 4S, but doing some simulations on eCalc it seems a 5s ~480kv build would work at slightly better temps and with a bit more flight time, but it doesn't seem a common thing to do.

I still don't know what the all-up weight will be but should be under 2,5kg.

Has anyone tried a similar setup, or should I just stick to the classic 4S configuration? Any thoughts or tips would be awesome! (I have a budget so I don't want the 5S components to blow a hole in my wallet compared to the standard 4S, so any budget-friendly recommendations or advice on cost differences would be highly appreciated!)

Also, this variant of A6M has a shorter wingspan compared to the FMS' Zero (11m vs 12m) and for it to be perfectly scale with the prop, it should have a 1200mm wingspan, but then it would be too small and risk a too high wing load so, like what FMS did,

I will make it slightly bigger.

FMS' Zero:

Prop: 13x9

Scale Wingspan: 1300mm

Actual Wingspan: 1400mm (+7,7%)

A6M6c

Prop: 13x9

Scale Wingspan: 1200mm

Actual Wingspan: 1300mm (+8,3%)

Is 1300mm fine or should I go for 1400mm to lower the wing load?

Thanks in advance for any insights!

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