Can someone with an engineering or technical background explain why there are two VA speeds at max gross weight. My A/C is a 1997 8KCAB. VA for aerobatics is 132MPH CAS and for normal ops is 121 MPH CAS. Since VA is predicated on max gross weight (VA decreasing as gross weight decreases) and the A/C gross weight is 1800# no matter how it is operated (normal or aerobatics) why two VAs in the POH?
TIA,. Pat Donahue