170B D windows.

[Richgj3]

What year(s) did the 170B have the D shaped rear windows? 56 only or 55 also? I’m talking model year, not year of manufacture.

Rich.

[Bruce Fenstermacher]

'55 and '56 had the more squared off D windows

[Richgj3]

Thanks Bruce. As you were typing that I found an old post about something else that referenced the first appearance of the D windows for the 1955 Model year….but built in 1954.

[GAHorn]

I’m curious why the later windows are being referred to as “D” windows….??….when it was the EARLIER (SN 26504 and previous) airplanes that had D-shaped windows…and it was the later SN 26505 and on airplanes that had the Trapezoid windows (kept thru the 172 series).

[DaveF]

Me too!