Yeah. Adding 10 knots for the spouse and 5 knots for each of the kids doesn't really increase the safety at all. It just gets you a quick tour of the overrun.

 

300 hours is not that much. You have maybe 50 or 60 landings over the span of several months? In a GA plane you could get that in 5 hours of pattern work.

But everyone gets in a rut of 'bad' landings. So many variables effect landings. I don't fly the 170, so I can't help there, but I know i'm the 145, the different variants feel a bit different in the flare. Plus, weight and balance and flap settings can change things up a lot. When i'm flying with FOs and they can't squeak out a good landing, I always ask where they are looking... 9 times out of 10 they are starting to look to close towards the approach end of the runway, instead of far down the runway. I can almost consistently get a nice smooth landing, but every once in a while I kind of slam it down for no apparent reason.

 

Ice prot speeds- chop the throttle at the 50' call. 30' non ice prot speeds-.
At either ice/ no ice speeds 30' level off then at 10' - flare. Works like a champ every time.

 

The 175 with the enhanced winglets are definitely more susceptible to floating compared to the older style winglet. Comparing 175v170, I probably least float in a 170 overall.

As others have said, Performance numbers are based off of coming over the threshold AT Vref, not Vapp. At our company, our Vapp is +5kts with a max of +15kts over Vref. With Ice speeds, I normally only do +5kts to Vapp since your carrying all the extra speed anyways.

Also make sure your looking down the runway. When your flying GA, there is less pressure on you and you do things naturally. At the airlines, you have another pilot and possibly a jumpseater watching, 70-76 people behind you judging you, as well as the plane itself reporting what you are doing. When I was still relatively new, for some reason right around the 200-300hrs mark, I really started floating a lot and would land towards the end of the touch down zone. I was flying with a pilot over a 5 day trip who had been on the plane more or less since day one of it flying at the regionals and she watched me and noticed I was getting fixed on the Touch down zone without even realizing it. Once I got back to the basics of looking down the runway and really learned the sight line of what it should look like, it was back to normal.

Your always going to have those random landings or trips where it just doesn't work. That's when you just say "Welcome to _insert_crappy_city_" and you laugh about it. And then when a passenger tells you about your landing you ask them: Are you at your destination? Did you arrive here safely without injury? Could you have done it any better? Have a nice day...

 

I always seem to land better in gusty winds or other external factors. I think it's just because I'm using more control inputs in the final few hundred feet as opposed to a completely calm approach that requires minimal input. When I have to fly it all the way to the ground, those last 50 feet or so don't seem to hold any surprises.
My worst landings are always when the aircraft light. I've not heard that it was due to the struts not compressing as much. I thought it was a mental thing.

 

Your seat is too high. That causes you too see more runway in the window giving you the sensation of being lower.

 

Totally agree. 99% of my float/slam problems are seat position dependent.