do you have the OpsSpecs for the A320,...if so do they answer A320 performance question...? or at least have you looked at the TERPS Criteria for the A320...don't you know that all operational information is for a type is listed in the TERPS under Far 25
and just too add SNS3Guppy is, amongst other things, an expert Ag pilot...so perhaps you could learn a little here from folks like him, no?