The pilot reported that during the landing flare he began to porpoise, on the second porpoise he encountered what he believed was a crosswind. He added full power to abort the landing, and subsequently the airplane impacted a ditch, which resulted in the right landing gear and nose wheel being separated from the airplane and substantial damage to the firewall.
The pilot reported there were no pre-impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.