shaHeen-1 Posted December 15, 2019 Posted December 15, 2019 (edited) I know this bug's been reported and possibly fixed already but it's still kinda hilarious. For those who don't know, the Jeff has been suffering from low drag especially at low altitude. About to land, a few miles from the airfield, I put out my airbrakes, put down my landing gear and put my throttle to idle. Note I'm still a couple miles from the runway and completely idle. Without touching the throttle again, I maneuvered the Jeff into a decent glide slope and came in for landing around 160kts. After touchdown I put it into aerobraking till 2/3 the runway length at kobuleti. It still wouldn't slow down. I pulled the nose up even more and tail struck. I dragged my tail across the remaining runway, and it wasn't until I hit the fence that the plane tumbled to a standstill. My throttle has been idle for a good two three minutes now. The Jeff gives no oofs about no airbrakes or drag. Only the wheel brakes and dragchute can slow it down apparantly. Edited December 18, 2019 by shaHeen-1 1.1
Sephyrius Posted December 15, 2019 Posted December 15, 2019 Before binding the flaps and speed brake I was literally unable to drop below 200 knots despite having gear out and idle throttle. Made for some silly landing attempts. :)
Terrorban Posted December 16, 2019 Posted December 16, 2019 What is the JF-17s safe landing approach speed? I didn't know these problems existed before because I was landing it Hornet style at the speed of stable 130 knots descend. The brakes are not that strong in the jet when compared with the Hornet or Viggen. At 130 knots, I can even land at the short runways without using the dragchute. This might not be realistic though since so many people have been getting problems doing touchdowns. Airplanes : A-10C II | AJS-37 | A/V-8B | F-4E | F-14A/B | F/A-18C | FC3 | JF-17 | M2000-C Helicopters : AH-64D | CH-47F | Ka-50 III | Mi-24P | Mi-8MTV2 | SA342 | UH-1H Other Modules : Combined Arms | Persian Gulf | Afghanistan TRAINED - LEARNING - LOW EXPERIENCE - ABANDONED
LJQCN101 Posted December 16, 2019 Posted December 16, 2019 On-speed AOA of JF-17 is 10 deg. The corresponding speed can vary vastly depending on gross weight. EFM / FCS developer, Deka Ironwork Simulations.
Terrorban Posted December 16, 2019 Posted December 16, 2019 In that case, what would be the maximum safe speed to touch the runway at with light weight vs heavy weight loadout? Don't want to blow out the tyres on landings. Airplanes : A-10C II | AJS-37 | A/V-8B | F-4E | F-14A/B | F/A-18C | FC3 | JF-17 | M2000-C Helicopters : AH-64D | CH-47F | Ka-50 III | Mi-24P | Mi-8MTV2 | SA342 | UH-1H Other Modules : Combined Arms | Persian Gulf | Afghanistan TRAINED - LEARNING - LOW EXPERIENCE - ABANDONED
Nealius Posted December 16, 2019 Posted December 16, 2019 Is this at low-altitude MSL? Landing at Kerman I didn't notice anything abnormal.
LJQCN101 Posted December 16, 2019 Posted December 16, 2019 In that case, what would be the maximum safe speed to touch the runway at with light weight vs heavy weight loadout? Don't want to blow out the tyres on landings. You should be good up to 205kts even at maximum take-off weight, only if you don't apply wheel brakes at such a speed. EFM / FCS developer, Deka Ironwork Simulations.
Chuck_Henry Posted December 18, 2019 Posted December 18, 2019 I'll concur with the initial post. Idle thrust and speed brakes are downright mandatory for the overhead break, which I have a hard time believing is the case IRL. Even the F-5, if you leave the throttles at whatever setting gave you 300 knots for the initial, will slow down to well below 250 if you simply roll and pull. The JF-17, with its significantly larger LEXs, should want to slow down even more.
Kumabit Posted December 19, 2019 Posted December 19, 2019 I'll concur with the initial post. Idle thrust and speed brakes are downright mandatory for the overhead break, which I have a hard time believing is the case IRL. Even the F-5, if you leave the throttles at whatever setting gave you 300 knots for the initial, will slow down to well below 250 if you simply roll and pull. The JF-17, with its significantly larger LEXs, should want to slow down even more. aI don't have any difficulties to slow down the JF17 during the approach. I can always quickly slow down the aircraft by sharp turning the aircraft and touch down at 135-145kts.
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