Well, I could not resist:<span style="font-size: medium"> How does the Turnigy SK3 5055-430Kvmotor perform with 5S LiPo ?
</span>So I ran some simulations on DriveCalc. Pic 1 shows the situation with 5S LiPo, and a 16x8 prop.
It gavethe following figures:</p>

prop Current (A) RPM Thrust (Kg) g/W
15x8 38.3 6854 3.35 4.7
16x8 46.2 6606 4.57 5.3
16x10 51.1 6453 3.82 4.0
17x10 58.7 6218 4.41 4.1
18x8 63.1 6082 5.43 4.6
19x8 64.2 6048 5.71 4.8</p>

Once again, the 16x10 prop performed badly. It drew more current that the 16x8, and gave much less thrust (see Pic 2).
Also, the 17x10 prop gave a much higher current than 16x8, and generated less thrust than 16x8.
Larger 18" and 19" props gave more thrust, but at higher current.
The prop with the highest g/W value was 16x8 -and this looks like maybe the best prop also, for 5S LiPo ....

Must get on with other things now ... Enough DriveCalc ...</p>