prop choice for twin DF41

[RunningBeer]

Hi Skippers,
I am building a twin 6s DF41. I need to design the prop spacing so I am seeking advice about what size prop you think I may get to roughly as a maximum diameter without the props being too far apart. My previous twin build (Pirate on twin 4s 30000RPM ended up sweet and safe on 43mm 1.6 pitch props). I am thinking I may need about enough space to spin 47's or 48's on 6s at 31000RPM, but I would love to hear from some of the legends on this forum who have greatly assisted me in the past. I'm only after about 3 mins run time, but don't want to get too close to the smoke zone. We all know smoking is bad for your boats health! Many thanks Running Beer.

[Jesse J]

What motors are you using, and what speeds are you after?
We can assume not racing?

[RunningBeer]

Hi, No, not racing. 90KM/Hr would be nice. I was thinking TP 4060 1350Kv for @30000 RPM. Thanks Callum

[Jesse J]

I like the 47 / 48 mm as a max, but would start with 45/3 aluminum to be safe and until you find out what she likes.
Of course, Still checking temps frequently on the first run.