Vapp in gusty conditions
Confirm, you add the headwind component and half the gust factor to Vref to get a increased Vapp in gusty conditions; e.g, RWY36, Wind 270/16, gusts up to 24 kts, Vref: 108 kts. 8 kts. (=headwind component) + 4 kts. (=halft the gust factor) are added. Vapp: 108kts.+8 kts.+4 kts.=120 kts. Vref remains unchanged.
Cheers
Cecco