Light Sport Update ... kinda, sorta, maybe, perhaps -

[Schuy]

A few GA aircraft and predicted power indices.
Looking at this table I think the power index cut off at 1.2 seems a bit big.
Fixed picture of power index expression

 

[GeorgeC]

I read it as

power index = the quantity (hp/area) raised to the 1/3 power < 1.2

, plus additional constraints (max hp, max weight, stall speed, etc).

 

[MendLeft]

Yes, cubed root and to the 1/3 power should be the same....correct. I think? I refreshed my skills last night.

 

[Capt. Geoffrey Thorpe]

cubed root and to the 1/3 power should be the same....correct.

Correct.

 

[MendLeft]

Here is the table I made last night...very similar, couple additional planes. I doubt all of these or even a majority would make it, (some aren't even 4 seaters), but I found it interesting how the numbers played out.