dock999 Posted December 11, 2023 Share Posted December 11, 2023 I have been experiencing the difficulty of jettisoning JF-17's external fuel tanks for quite a while. There seems to be a speed limit for dropping tanks. You can not jettison the external fuel tanks until the speed is below around 450 km/h and I wonder if anyone has had a similar issue? , The limitation can cause a great deal of difficulty in performing a defensive maneuver after firing a missile. Link to comment Share on other sites More sharing options...
DSplayer Posted December 11, 2023 Share Posted December 11, 2023 2 hours ago, dock999 said: I have been experiencing the difficulty of jettisoning JF-17's external fuel tanks for quite a while. There seems to be a speed limit for dropping tanks. You can not jettison the external fuel tanks until the speed is below around 450 km/h and I wonder if anyone has had a similar issue? , The limitation can cause a great deal of difficulty in performing a defensive maneuver after firing a missile. Unfortunately, it's a limitation and you'll have to slow down to jettison your tanks. Max speed is roughly Mach 0.9 iirc. -Tinkerer, Certified F-14 and AIM-54 Nut | Discord: @dsplayer Setup: i7-8700k, GTX 1080 Ti, 32GB 3066Mhz, Lots of Storage, Saitek/Logitech X56 HOTAS, TrackIR + TrackClipPro Modules: F-14, F/A-18, JF-17, F-16C, Mirage 2000C, FC3, F-5E, Mi-24P, AJS-37, AV-8B, A-10C II, AH-64D, MiG-21bis, F-86F, MiG-19P, P-51D, Mirage F1, L-39, C-101, SA342M, Ka-50 III, Supercarrier, F-15E Maps: Caucasus, Marianas, South Atlantic, Persian Gulf, Syria, Nevada Mods I've Made: F-14 Factory Clean Cockpit Mod | Modern F-14 Weapons Mod | Iranian F-14 Weapons Pack | F-14B Nozzle Percentage Mod + Label Fix | AIM-23 Hawk Mod for F-14 Link to comment Share on other sites More sharing options...
dock999 Posted December 11, 2023 Author Share Posted December 11, 2023 4 hours ago, DSplayer said: Unfortunately, it's a limitation and you'll have to slow down to jettison your tanks. Max speed is roughly Mach 0.9 iirc. Right, so this is a known limitation. Link to comment Share on other sites More sharing options...
Mike_Romeo Posted December 11, 2023 Share Posted December 11, 2023 13 hours ago, dock999 said: Right, so this is a known limitation. Its a real life safty limitation yes. However, they dont apply to the smaller 800L tanks. 1 My skins Link to comment Share on other sites More sharing options...
Napillo Posted December 14, 2023 Share Posted December 14, 2023 Yes, the smaller tanks can jettison at a pretty quick clip, and if you're loading on the large tanks, you're taking too much fuel. Link to comment Share on other sites More sharing options...
dock999 Posted December 15, 2023 Author Share Posted December 15, 2023 On 12/14/2023 at 2:07 PM, Napillo said: Yes, the smaller tanks can jettison at a pretty quick clip, and if you're loading on the large tanks, you're taking too much fuel. I noticed that the 800 L tank could be jettisoned at about 500 km/h but the 1100 L tank could be done only at about 430 km/h, which was a bit annoying in the PVP match. Link to comment Share on other sites More sharing options...
Dr_Pavelheer Posted December 15, 2023 Share Posted December 15, 2023 @dock999 I'm pretty sure it's about Mach, not airspeed. As you approach speed of sound the way air flows around the aircraft changes, which means things like bombs, missiles, tanks might not necessarily separate safely from the aircraft above certain speeds. Take a look at photos of external fuel tanks carried by Su-24, they have little wings in the front to make sure they don't hit the aircraft when jettisoned Also airspeed in the JF-17 is measured in knots, not km/h, to be more precise by default it shows KCAS, Calibrated Airspeed in knots Link to comment Share on other sites More sharing options...
dock999 Posted December 16, 2023 Author Share Posted December 16, 2023 Thanks for the excellent input. Link to comment Share on other sites More sharing options...
MrBlob Posted January 5 Share Posted January 5 On 12/11/2023 at 2:50 AM, DSplayer said: Unfortunately, it's a limitation and you'll have to slow down to jettison your tanks. Max speed is roughly Mach 0.9 iirc. 0.8 for the large tanks, 1.0 for small tanks. 1 Link to comment Share on other sites More sharing options...
jubuttib Posted February 20 Share Posted February 20 On 12/15/2023 at 6:30 AM, dock999 said: I noticed that the 800 L tank could be jettisoned at about 500 km/h but the 1100 L tank could be done only at about 430 km/h, which was a bit annoying in the PVP match. Are you sure you're talking about "km/h" and not knots? 500 km/h is barely above the speed where you can put down your landing gear... Link to comment Share on other sites More sharing options...
dock999 Posted February 22 Author Share Posted February 22 On 2/20/2024 at 11:02 PM, jubuttib said: Are you sure you're talking about "km/h" and not knots? 500 km/h is barely above the speed where you can put down your landing gear... Someone had already pointed it out. Now I realize the dropping tank is more about Mach Number rather than Speed Number. Link to comment Share on other sites More sharing options...
Tiger-II Posted March 1 Share Posted March 1 It's both. At high altitude/Mach number, CAS is lower, relatively, so the Mach limit applies. The limit is built into the jettison function. It's not an aerodynamic limit but a technical one built into the system. Motorola 68000 | 1 Mb | Debug port "When performing a forced landing, fly the aircraft as far into the crash as possible." - Bob Hoover. The JF-17 is not better than the F-16; it's different. It's how you fly that counts. "An average aircraft with a skilled pilot, will out-perform the superior aircraft with an average pilot." Link to comment Share on other sites More sharing options...
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