Re: Same X and Y scale

DELFTship forum Feature requests Same X and Y scale Re: Same X and Y scale

#36122
Sailboats
Participant

Calcagni, I don’t understand how can I help you…
I’m not a NA also, by the way, so don’t take my thoughts as accurate info…
What data seems to be forced for you?
When scaling down to 1m you will not find the same behavior because of the different incidence of water viscosity in total resistance, basically to reach the same Froude number you will need:
-more sail area
-more weight on ballast to stand the bigger sails
-bigger fin area to compensate the bigger side-force
-all this leads you to a bigger total displacement
Check the Doug Lord’s scow models, he has a lot of experience in scaled down RC models.