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No
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Yes
Brief description of the issue:
Was attempting a landing at an airport with a runway length of 4498feet or 1371meters. Manuals i had indicate i needed 911meters of length and full reverse thrust and minor brake pedal use. To my surprise i landed the plane slightly past main touchdown zone and the aircraft decelerate so abruptly with full reversers and i did not use the brake pedals at all i idle back the throttle by 50knots below. Runway length usage was only 606 meters without any headwind and the ground temperature was 35c. Performance here is more akin to the atr42-600. Perhaps some tweaking with full reverse thrust behavior is needed.
Detailed steps to reproduce the issue encountered:
Fly into any airport at 50feet msl and short runway. Apply a gross weight of 18.5tonnes. Actual steps needed were full reverse thrust and minor brake tap and full stop will occur within 900-920meters runway use without any headwind.
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Do you have the same issue if you follow the OP’s steps to reproduce it?
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This is based on a partial airline fcom and customised performance table(circa 2016) i had from a friend who operated the 600 series in south east asia.
Just did another landing. This time with gross weight 20.5tonnes with 3 knots of tailwind and i opted not to use brake pedals only using full reverse thrust. The aircraft slowed to a stop using within 600meters of runway upon touch down no brake pedals in use.
Believe the reverse thrust in full is a bit tad too powerful. Cause in real life operations in the airport it needs full reverse thrust coupled with gentle single long brake tap not full brakes use once the nose gear sits that also the aircraft needing up to 900meters of safe runway length not 600meters.
Yes generally most landing distance data is on max braking effort. As for the documents i was partially given it was something the airline tested since 2008(from the 500 series up to 600 series) and has compiled a rough graph for its crew. The standard use is for any uncontaminated runway shorter than 1400meters, full reverse thrust with light brake application will be applied. Anything longer, reverse thrust will not be use or it will be idle reverse with light brake use sufficient.
For now i hope the dev adjust the reverse thrust behavior. The plane being able to stop itself so quickly on full reverse thrust without needing any brakes is something not in the correct aspect for the aircraft. Reverse usually only partially aids the stopping margin it is not something to be used on its own entirely.
Just tested idle thrust landing with some braking seems to behave as expected. So it seems the problem here lies with the application of full reverse thrust. I have yet to try the atr42 perhaps i will try it out next and apply full reversers to see how it behaves. Unfortunately i dont have any performance data for the atr42.
Hello all
I have slightly different issue, although it’s with the reverser as well.
When my main gear touches the ground the reverser kicks in and max braking as well. It drives me crazy, because in some cases, I get to <50kts before the nose gear even has time to touch the ground.
Has anyone encountered this problem before?
I’ve got it! And it’s most likely a solution to most people with reverser and braking issues.
I thought, that the tablet/performance is used to calculate Vspd for approach, but it’s not! It’s a way to tell the autopilot how do we want to handle landing, f.ex marking red reverse on approach makes aircraft use max reverse the moment main gear touches the ground. Setting any other option for runway than dry makes aircraft use brakes. Mind, once you flip the page for some other, performance options on approach changes to default max break and max reverse, so you need to be on PERFORMANCE page with preferred options set when on approach up to the landing
So, in order to have the autopilot do nothing and allow the pilot to control everything, the options that have to be set are: no reversers and dry runway
Hope that helps to whoever comes seeking the answers here
It definately solved my problem. Did few flights with these two options as on picture and the auto reversers did not kick in.
I also unclicked the option in option menu that my joystick has reverse axis, so I need to activate reverser now myself. Unclicking this option before I made changes on perf page did not help and I still did have these weird auto reversers kick in. Only after marking in perf option no reversers did I solve my problem.
I’m sorry if this not after all the ultimate solution, but I thought I will get it out to community as a potential fix.
Best
Andrew
Do you have the same issue if you follow the OP’s steps to reproduce it?
Same issue, don’t have to follow exact steps to reproduce it. Reversers seem way too powerful. They activate on contact of the main gear with ground. The activation is immediate and 100% reverser is activated.
Provide extra information to complete the original description of the issue:
Managed to resolve the issue when NO REV options clicked on tap/perf page and dry runway option clicked on tab/perf page
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