Jenson Posted September 27, 2021 Share Posted September 27, 2021 Hi there, I read in the manual that the hornet pitch should be trimmed according to the take off weight as follow: less than 44,000 lbs: 16 degree 45,000 - 48,000 lbs: 17 degree above 49,000 lbs: 19 degree I have a few questions and wonder if anyone could advise: 1. Why there isn't 18 degree recommended? 2. If take-off weight is way below 44,000 lbs, should we adjust it further down to 15 degree or even less? I noted if trim is less than 15 degree, the Master caution will lit, however, when I take off with 35,000 lbs, even if trimmed at 15 degree, the hornet will lift nose up like a rocket after launch. So the real question is, why the take-off trim isn't calculated more precisely based on aircraft weight, especially when take off at a super light weight? Thanks PC Specs: Intel i7 9700, Nvidia RTX 2080S, Corsair 64G DDR4, MSI B360M Mortar Titanium, Intel 760P M.2 256GB SSD + Samsung 1TB SSD, Corsair RM650x Flight Gears: Logitech X56 HOTAS & Flight Rudder Pedals, HP Reverb G2 Modules: F-14A/B, F-15C, F-16C, F/A-18C, AV-8B, A-10C I/II, Supercarrier, Nevada, Persian Gulf, Syria Location: Shanghai, CHINA Project: Operation Hormuz [F/A-18C Multiplayer Campaign] Link to comment Share on other sites More sharing options...
Bluto74 Posted September 30, 2021 Share Posted September 30, 2021 (edited) I guess the short answer would be because that is what the test pilots determined the best settings for that situation. Probably not the answer you were looking for but it has all been determined from the weight affecting the CG moment. You need the nose to pitch up correctly on the shot so 16 gets you correct in the light weight condition. As you load up the CG moment moves forward so you need more deflection to pitch up. Also, if you have full burner in coming off the end you will blast off. Light loads would not have the blower on when getting shot. Edited September 30, 2021 by WaWa74 Link to comment Share on other sites More sharing options...
Wroblowaty Posted September 30, 2021 Share Posted September 30, 2021 Interesting is, why there are gaps between 44000 and 45000 and between 48000 and 49000. Like when you are at 44600. You are not less then 44000 but not 45000 yet... Link to comment Share on other sites More sharing options...
Tholozor Posted September 30, 2021 Share Posted September 30, 2021 (edited) 16° nose-up trim is the minimum trim for catapult launch at half flaps, regardless of total weight, due to how the FCS handles automatic aircraft rotation after launch. Trim settings pre-launch will correspond to a specified reference AoA once weight-off-wheels. The recommended trim settings are in place in order to reduce sink-off-bow after launch and as a backstop safety measure in the event of a single engine failure to maintain control. NATOPS section 8.2.8 covers this is more detail. Edited September 30, 2021 by Tholozor 1 REAPER 51 | Tholozor VFA-136 (c.2007): https://www.digitalcombatsimulator.com/en/files/3305981/ Arleigh Burke Destroyer Pack (2020): https://www.digitalcombatsimulator.com/en/files/3313752/ Link to comment Share on other sites More sharing options...
Qiou87 Posted October 1, 2021 Share Posted October 1, 2021 (edited) 18 hours ago, Wroblowaty said: Interesting is, why there are gaps between 44000 and 45000 and between 48000 and 49000. Like when you are at 44600. You are not less then 44000 but not 45000 yet... Definitely, if you are between values, default back to 12° (and sink after launch) I think this is the kind of table that tries to give you a feel for what to do, not a precise instruction (for example, at 44,950lbs someone might prefer to use 17°, someone else will chose 16°...). This is a sim and not real world, I honestly don't check my T/O weight everytime and just do it with a basic rule: - A/A loadout 17° (meaning AMRAAMS and 1 tank) - A/G loadout 18° - heavy A/G loadout (8x AGM-154, or 2000lbs bombs on each pylon) 19° Interesting that the manual doesn't have 18°, this is my most-used setting and it works very reliably when I have a medium-heavy A/G loadout for example... Edited October 1, 2021 by Qiou87 AMD R7 5800X3D | 64GB DDR4 3200MHz | RTX 4080S 16GB | Varjo Aero | VKB Gunfighter Pro Mk3 + STECS + pedals Link to comment Share on other sites More sharing options...
Bluto74 Posted October 1, 2021 Share Posted October 1, 2021 It all works good until you lose a fan on takeoff. We don't have to worry about that though. Link to comment Share on other sites More sharing options...
Bingo41 Posted October 5, 2021 Share Posted October 5, 2021 I am a little confused about trim. I have been using the weight schedule to setup trim using the HAT switch on my HOTAS. On the left side of the cockpit, behind the throttles, is a "Trim Button." What function does this button have? Bill Clark Bill Clark Win10, V-2004//I5-8600K 5.2GHz//Nvidia GTX 1080Ti//VRAM 11GB RAM 32GB//2TB M2.NVMe//Gigabyte Z370 Gaming 7//Corsair H115i Link to comment Share on other sites More sharing options...
Bluto74 Posted October 5, 2021 Share Posted October 5, 2021 50 minutes ago, Bingo41 said: I am a little confused about trim. I have been using the weight schedule to setup trim using the HAT switch on my HOTAS. On the left side of the cockpit, behind the throttles, is a "Trim Button." What function does this button have? Bill Clark That sets the takeoff trim value of 12 if you are referring to the Hornet. Which is what you use at the airfields. Link to comment Share on other sites More sharing options...
Jenson Posted October 13, 2021 Author Share Posted October 13, 2021 So, have you guys experienced the situation when the hornet is super light loaded, the nose will keep pitching up all the way up if you don't touch the stick? PC Specs: Intel i7 9700, Nvidia RTX 2080S, Corsair 64G DDR4, MSI B360M Mortar Titanium, Intel 760P M.2 256GB SSD + Samsung 1TB SSD, Corsair RM650x Flight Gears: Logitech X56 HOTAS & Flight Rudder Pedals, HP Reverb G2 Modules: F-14A/B, F-15C, F-16C, F/A-18C, AV-8B, A-10C I/II, Supercarrier, Nevada, Persian Gulf, Syria Location: Shanghai, CHINA Project: Operation Hormuz [F/A-18C Multiplayer Campaign] Link to comment Share on other sites More sharing options...
pete_auau Posted October 15, 2021 Share Posted October 15, 2021 On 10/13/2021 at 1:48 PM, Jenson said: So, have you guys experienced the situation when the hornet is super light loaded, the nose will keep pitching up all the way up if you don't touch the stick? just tried it loaded half of fuel added 15 for trim and had no issues had to pull slightly on the stick to raise the nose and then it kept its steady climb Link to comment Share on other sites More sharing options...
Foka Posted October 17, 2021 Share Posted October 17, 2021 Isn't the a Hornet quiestion, not the carrier question? Link to comment Share on other sites More sharing options...
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