PPRuNe Forums - View Single Post - Rejecting A Takeoff After V1…why Does It (still) Happen?
Old 7th Dec 2010, 19:35
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johns7022
 
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The conversation has always been an RTO vs Flying it off...those are your choices...

If you do a little study on how planes are flight tested for RTOs, it's pretty much Joe Test Pilot accelerating up and down the runway to V1, then applying brakes.....then recording the distance data, checking the brakes for issues ect.

Now the manufacturer has some flight test numbers of a pilot who say just did 1000 RTOs...he's probably gotten pretty good at them...so some buffers are added to for variables such as age planes, back pilots, older brakes and tires...probably a little for mom.

So let's think about this...with all the runway in the world ahead of you, stopping distance is not the issue...and the difference between V1 to VR is say 10 knots.....do you really think that if your brakes are certified to be 100% reliable to brake from V1, at Max Gross Weight ...that another 5kts or so is going to be the difference in your brakes failing?

If your going to make the argument of not doing RTOs....the proper way to discuss your end is talk about distance, not brake failure, and why so many of you are throwing out your margins with assumed power/derated take offs.
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