Ramsay Posted November 11, 2018 Posted November 11, 2018 (edited) TL;DR: Displaying climb rate when the 'FPAS CLIMB' button is boxed, doesn't look right, can you confirm the current implementation is correct ? Detail: It's described as the "Climb/descent airspeed" in Fig 2-7 of the RL Fight Manual (p97-98, Fig 2-7, FA-18ABCD Hornet Flight Manual, F18-ABCD-000) and the optimum climb profile table gives pilots airspeeds/altitudes to fly an optimum climb profile i.e. 360 KCAS / 0.81 Mach My best guess is that DCS's FPAS 'CLIMB' button is showing the "Instantaneous Rate of Climb" (p80, Fig 11-28, FA-18ABCD Performance Charts, a1-f18ac-nfm-200). However the climb rate doesn't appear to be sustainable at Military Trust and it's hard to see how 'rate of climb' is used to follow a descent profile. The Climb Speed Schedule for DI=100 is 360 KCAS/0.81M (p67, fig 11-23, FA-18ABCD Performance Charts, a1-f18ac-nfm-200) and following the RL optimum climb profile, the DCS Hornet worked well, matching the time and distance required to reach the optimum cruise altitude. Note: The F/A-18E/F Fight manual is a little more descriptive than the F/A-18C's, specifically saying it's FPAS 'Climb' button displays the optimum KCAS for climb/descent, so it looks like a bug (unless the the earlier F/A-18C is different, however the F/A-18E/F HUD diagram and description is similar). When selected, CLIMB is boxed and the climb airspeed prompt indicates the desired calibrated airspeed for an optimum climb profile. Tested DCS Open Beta 2.5.3.23954, GTW 41,462 lb (120C*4,9X*2,Fuel 330 gal), Persian Gulf Edited November 11, 2018 by Ramsay i9 9900K @4.8GHz, 64GB DDR4, RTX4070 12GB, 1+2TB NVMe, 6+4TB HD, 4+1TB SSD, Winwing Orion 2 F-15EX Throttle + F-16EX Stick, TPR Pedals, TIR5, Win 11 Pro x64, Odyssey G93SC 5120X1440
dresoccer4 Posted November 21, 2018 Posted November 21, 2018 bump...i'm confused about what the climb value is showing... Acer Predator Triton 700 || i7-7700HQ || 512GB SSD || 32GB RAM || GTX1080 Max-Q || FFB II and Thrustmaster TWCS Throttle || All DCS Modules
Eldur Posted November 22, 2018 Posted November 22, 2018 (edited) I'd say this is pretty clear and obvious in the NFM ( I-2-26, p. 98 ): 2.3.1.1.8 Climb Pushbutton. Pressing the climb pushbutton on the FPAS display enables the climb air speed prompt on the HUD if the HUD reject switch is in the normal position. When selected, the CLIMB legend is boxed. If not in the NAV master mode, the climb pushbutton is removed from the FPAS display. Edited November 22, 2018 by Eldur ugly auto smileys removal
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