mobile83 Posted June 13, 2022 Share Posted June 13, 2022 I flew with a huge crosswind and the f16 indicates me a wind of 1 kt and on the ground it indicates me 0 whereas there was at least 20 knots of wind. This indicator is wrong Link to comment Share on other sites More sharing options...
Frederf Posted June 14, 2022 Share Posted June 14, 2022 (edited) Indication uses the difference between CADC and INS data to calculate wind. It's impossible to calculate when not airborne. From memory (and don't trust it) default (DFLT) is possibly loaded data from pre-planning. In short this behavior is correct to first approximation. If there is some ground special output It's not the normal calculation. EDIT: Memory is getting better. "DFLT" has nothing to do with the wind calculation. It's related to the communication radios. If the UFC memory is lost the UFC reverts to default values and DFLT is displayed, otherwise blank. You shouldn't be seeing it basically ever. Edited June 14, 2022 by Frederf Link to comment Share on other sites More sharing options...
777coletrain Posted June 14, 2022 Share Posted June 14, 2022 This is correct, here is an image from a HUD tape video on youtube where it indicates 0 kts. When he takes off the correct wind is shown null Link to comment Share on other sites More sharing options...
TheBigTatanka Posted June 14, 2022 Share Posted June 14, 2022 Air data computers are only accurate above a certain speed. Sent from my Pixel 3 XL using Tapatalk Dances, PhD Jet Hobo https://v65th.wordpress.com/ Link to comment Share on other sites More sharing options...
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