Small corrections here.
The official power off stall speed for 415D, 415E, 415G and Forney F1 models is
56 MPH
56 mile/hour (mph) = 48.662 669 547 knot
So there you go. The later style Ercoupes won't qualify for Sport Pilot
because a higher gross weight also results in a higher stall speed.
I don't have the Flight manual for an Alon, but 45 knots stall speed seems too
optimistic to me. The Alon has an even higher gross weight.
The only way that an Ercoupe would qualify would be by using the Skyport STC
thereby REDUCING the gross weight for later style Ercoupes.
Now John, if that would be an option , this would be a good selling STC
wouldn't it?
Hartmut
----- Original Message -----
From: Ralph Finch
To: [EMAIL PROTECTED] ; 'ety Tech'
Sent: Saturday, August 16, 2008 10:02 PM
Subject: [ercoupe-tech] RE: [ercoupe-flyin] Re: Keep Your FIngers Crossed!
Very nice comparison, thanks for putting numbers to it. As an Alon owner, my
interest is in that model. The Alon might make if the performance numbers
below are correct (from the Wikipedia article on ERCO Ercoupes).
Make Model Gross Weight (lbs) Horsepower Stall Speed - Clean (kts)
Stall Speed - Dirty (kts) Empty Weight (lbs) Fuel Capacity (gals) Useful Load
(lbs)
Cessna 152 1670 110 48 43 1141 26 373
Cessna 150 1500 100 48 47 962 26 382
Cessna 150M 1600 100 48 42 1104 26 340
Ercoupe 415C 1260 75 42 42 749 24 367
Ercoupe 415D 1400 85 42 42 838 24 418
Aircoupe A2-A 1450 90 45 45 930 24 376
----------------------------------------------------------------------------
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of fnelson913
Sent: Saturday, August 16, 2008 6:13 AM
To: [EMAIL PROTECTED]
Subject: [ercoupe-flyin] Re: Keep Your FIngers Crossed!
Maybe not.
If I have my performance numbers correct, raising the weight
limitations for Light Sport Aircraft alone would not allow C-150s
into the market. The maximum stall speed allowed is 45 knots. That is
the clean stall speed. It appears that the clean stall speed on the C-
150 is 48 knots (42 knots with flaps). It is not likely that the FAA
would change two limitations just to allow C-150s. I think Cessna
would be lobbying strong against that given their investment in the
FluffCatcher. Beside that, the 415D which would benefit from a high
gross weight limitation has a greater useful load than C-150.
I have posted a file with a comparison.
Frank Nelson
N51DV - 415C
TOA
.
