Ray, I find always useful information!
ORIGINAL: RFJ
This is the MAN report of the same 1961 Detroit Invitational. Again, as far as I can see, no useful information [

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Ray
There it is, assignable cause, fault of the RCCD Web site editor.
Top, copy of the webpage RCCD so 16 and 17 september:<WEEK>
Bottom is original copy of MAN so 9 and 10 September:<WEEK
END> as I did write in post 309
(In the Netherlands we would have say the week OF Labor Day or the weekend after Labor Day).
Always be careful with data and if possible, double check!!!!!!
BTW I did make a picture of the wind speed in Chicago, Illinois on the date 8 and 9 april 1961, maybe the weekend of the first flight of the Oldest Taurus on Earth to see if test flying was possible in that period. 5 Months before the Detroit Invitational.
Of course I also know
humidity, temperature, barometer pressure etc.
More to come, wing covering is hot item these days.
Cees