Flap compatibility for vintage birds with smooth surface

[Andy95W]

My (former) 1967 M20C was also 100 on the ASI.  Maybe it changed AT the introduction of the 1968?

[mooniac15u]

According to the TCDS the speed changed from 100 to 125 starting with S/N 690001 for the M20E which was the 1969 model year and S/N 680001 for the M20C which was the 1968 model year. 

[Hank]

Yep. Looks like they did the good ones first. That explains a lot. 

[Andy95W]

Still wonder what prompted the change.  We should've asked Bill Wheat.

[MyNameIsNobody]

5 hours ago, mooniac15u said:

According to the TCDS the speed changed from 100 to 125 starting with S/N 690001 for the M20E which was the 1969 model year and S/N 680001 for the M20C which was the 1968 model year. 

Sooooo, NOT "before '68 Model year" on the flap revision...

[MyNameIsNobody]

11 minutes ago, N1395W said:

Still wonder what prompted the change.  We should've asked Bill Wheat.

Having ability to extend flaps over 100 MPH?  That is nice improvement.

[Cabo Lee]

The aileron edge must be straight to use PC (not the flap).

[MyNameIsNobody]

Getting close...

Flap I purchased to replace a functional but ever so slightly hanger rashed right flap...I pushed my plane back into hanger shortly after buying (winter/icy) and there were two vertical hanger supports if you went to deep you hit 'em...I did.

Totally cosmetic, but found a replacement flap for $350 after watching for a decade on EBay.  Sister visiting and after cousin picked up and took to her house sister put in van and delivered to hometown in Wisconsin via Arkansas...Picked up today (Fit in my Ford Fusion BARELY...Dropped off at A&P and opened up box.  Flap looks good.  Relief.  Soon to have a rash free bird for the first time in my ownership.

NICE.

[MyNameIsNobody]

On December 31, 2015 at 6:10 PM, MyNameIsNobody said:

Any issues with putting a 1963 C Flap on a 1966 E Model?

Summary:  NOT COMPATIBLE

[Andy95W]

What's different?

[MyNameIsNobody]

4 hours ago, N1395W said:

What's different?

Attach Point Hardware and shape of flap in-board.  Completely different integrated main attach point.  Good news is that I likely have a buyer for this very good condition right flap.  Oh well...