Prefered prop for dle 120

[F8fbigbear1]

I have a HAN 9 33% pawnee and 100cc Decathalon both with dle 120's. I am asking for suggestion for prefered prop sizes for draggin sailplanes into the sky. I am new to aerotowing. The pawnee is as is from the factory......for now and the decathon is in the process of getting flaps added. Thanks for any input

[Sinkhappens86]

I use DA 120s on my Pawnees and run the Falcon 27x11