The TCDS for the aircraft type is well worth downloading from
www.faa.gov.
It will have an assortment of useful stuff, including the W&B info
someone
else posted. Go to http://www.faa.gov/certification/aircraft/index.htm
and then
click on "Type Certificate Data Sheets" on the left margin.

One rather interesting thing I noticed on the PA-12 one (A-780) is that
the
never exceed speed is lower for normal category than utility category.
(I've
never seen that before.)

I grab a copy of the TCDS for each type I fly. Useful for dispelling
myths, if
nothing else, rick