from Geapins "vr which inturn cannt be greater than v2, which by the way is about 20% above vs"
V2[depending on the airplane it it's cert.] is either
1. 1.05 *Vmu if tail grounding limit or elevator power limited
2. 1.10*Vmu if not tail ground or elevator limited
3. The speed that allows the greater of either 1.1*Vmca or 1.2Vso to be achieved at the applicable screen height
though they are all fundementally related to Vso
Keep The Brown Down
rhov