John Cooper wrote:
>>>>>>>>>>>>>
Ed often refers to his "extreme climb prop", a 7146. For any other type,
this is simply a climb prop. 7144 is extreme, or a seaplane prop. The 7150,
Ercoupe's "standard" prop is a cruise prop in anyone else's world. Now, if
the Ercoupe had significantly less drag (and consequently higher cruise
speed) then a higher pitch might be warranted, but.
<<<<<<<<<<<<<
Notes from a lakeside campsite near Ely, Minnesota, just outside the
Boundary Waters Canoe Area.
I base that terminology (I invented) of calling teh 7146 an "extreme climb
prop" based on the "normal" Ercoupe terminology. The 7146 gave my C-85
almost exactly the maximum allowed static rpm of 2225.
I'd agree with John that the correct terminology for Coupes with the C-85
should be:
7146 climb prop
7148 normal prop
7150 cruise prop
7152 extreme cruise prop only for light weight or extremely clean Coupes
(note that in a heavy plane, this prop may give both terrible climb and
terrible cruise).
John wrote:
>>>>>>>>>>>>>>>
There are a number of different type aircraft with C85 engines and similar
speed and drag characteristics. Ercoupes, Cessna 120/140, Luscombe,
Taylorcraft, the list goes on. With the exception of the Ercoupe, they all
call for a 7148 as the standard prop. There is no reason why the Ercoupe
would be any different.
<<<<<<<<<<<<<<<
Agreed.
The vacation is nice. More canoeing today. Back online normally around
Tuesday.
Ed
