No Visa Required for hour building
All above are correct....no visa for hourbuilding however....
Make sure that you are able to fly in the US ie do you have the conversion based on your licence or do you have a FAA licence. Then you are fine on the wiaver or B2.
If you are going for the conversion the FAA are stating up to 60 days for the issuance after they check out your credentials (however most are taking 30-45 days). This way no Visa is required!
If you do not have that time and consider doing the FAA written, oral and skill test then you WILL need a visa as you are training towards a licence, certificate or rating.
So be careful when you are just considering the actual hour building!
There are so many great trips in the US.....each state is like a different country with accents, terrain and weather! Have a blast!