N0L3R Posted July 19, 2022 Share Posted July 19, 2022 (edited) Hello All, Can you please help me with this issue? The KIAS on the HUD (279 Kts) is different from the KIAS shown in the external view (272 Kts). Kindly refer to the attached images. Does anyone know why there is this discrepancy? I mostly find it confusing when I need to rendez-vous with a Tanker. Edited July 19, 2022 by N0L3R Link to comment Share on other sites More sharing options...
AngelAtTheTomb Posted July 19, 2022 Share Posted July 19, 2022 IIRC the external view is IAS and the HUD is actually CAS, IAS corrected for temp and altitude. Or it's the other way around, I can never remember. Link to comment Share on other sites More sharing options...
Frederf Posted July 19, 2022 Share Posted July 19, 2022 I believe the outside "IAS" is actually EAS (even more differenter than CAS). The F-18 HUD should display CAS. Link to comment Share on other sites More sharing options...
pokeraccio Posted July 19, 2022 Share Posted July 19, 2022 (edited) 49 minutes ago, N0L3R said: The KIAS on the HUD (279 Kts) The HUD airspeed box is CAS not IAS ref: DCS F/A-18C HORNET Flight Manual Pg.110-111 Edited July 19, 2022 by pokeraccio ref Pokeraccio Forum: Pokeraccio F/A-18C Hornet - Weapons QRH Quick Reference Handbook / Checklist / Kneeboard User Files: Pokeraccio F/A-18C Hornet - Weapons QRH Quick Reference Handbook / Checklist / Kneeboard User Files: Spitfire LF Mk.IX QRH / Checklist / Pilot's Note Kneeboard by Pokeraccio Link to comment Share on other sites More sharing options...
Jel Posted July 20, 2022 Share Posted July 20, 2022 (edited) vor 10 Stunden schrieb AngelAtTheTomb: IIRC the external view is IAS and the HUD is actually CAS, IAS corrected for temp and altitude. Or it's the other way around, I can never remember. Almost. What you are referring to is called "True Airspeed" or TAS. The Calibrated Airspeed or CAS is "just" a corrected IAS for known errors from your pitot, usually from pressure differences on the different parts of your airframe while moving through the air (because of how a pitot works, there always are minor instrument errors which fortunately are known on each airframe and therefore can be considered when showing CAS). Edited July 20, 2022 by Jel 1 When in doubt - climb. Nobody ever collided with air. Link to comment Share on other sites More sharing options...
CBStu Posted July 20, 2022 Share Posted July 20, 2022 I don't aar much because I still have never done it successfully. But I have noticed that the speed and altitude #s provided over the radio by the tanker are never correct. They seem to be + or - 500ft and + or - 30k. I have noticed the same checking the other plane on the F10 map when trying to join on another FA-18 to fly as a pair to a target. Link to comment Share on other sites More sharing options...
N0L3R Posted July 20, 2022 Author Share Posted July 20, 2022 Thanks all for the replies...extremely helpful ! Safe missions 1 Link to comment Share on other sites More sharing options...
Ahmed Posted July 22, 2022 Share Posted July 22, 2022 (edited) HUD: CAS External view: EAS (not TAS... TAS would be higher than CAS) F10: GS off the top of my head. Edited July 22, 2022 by Ahmed Link to comment Share on other sites More sharing options...
Ala12Rv-Tundra Posted July 23, 2022 Share Posted July 23, 2022 Pressing ctrl+y on external F2 view will show GS 1 i5 8400 | 32 Gb RAM | RTX 2080Ti | Virpil Mongoose T-50 base w/ Warthog & Hornet sticks | Warthog throttle | Cougar throttle USB | DIY Collective | Virpil desk mount | VKB T-Rudder Mk IV | Oculus Rift S | Buddy-Fox A-10 UFC | 3x TM MFDs | 2x bass shakers pedal plate| SIMple SIMpit chair | WinWing TakeOff panel | PointCTRL v2 | Andre JetSeat | Winwing Hornet UFC | Winwing Viper ICP FC3 - Warthog - F-5E - Harrier - NTTR - Hornet - Tomcat - Huey - Viper - C-101 - PG - Hip - SuperCarrier - Syria - Warthog II - Hind - South Atlantic - Sinai - Strike Eagle Link to comment Share on other sites More sharing options...
EAF602 Red Posted July 23, 2022 Share Posted July 23, 2022 Quick observation, if you need to rendezvous with a Tanker, just do a ToT on it Link to comment Share on other sites More sharing options...
AndyJWest Posted July 23, 2022 Share Posted July 23, 2022 18 minutes ago, EAF602 Red said: Quick observation, if you need to rendezvous with a Tanker, just do a ToT on it And, if you don't want extra excitement, figure out which way it is going. A head-on rendezvous doesn't really work, and I won't be trying that again... Link to comment Share on other sites More sharing options...
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