Hi Linda,
It is a "...separate thing [fitting connecting] the fuel pump and the
rubber fuel line...from the fuel pump [to a firewall fitting then
connected by a metal fuel line to] the header tank".
Per Ercoupe Service Memorandum No. 31, item 16:
"A restricted fitting is located on the outlet side of the fuel pump
and limits the output of fuel to a quantity slightly in excess of the
requirements of full throttle operation."
Ercoupe Service Memorandum No. 42, Fig. 2 shows the location of the
45 degree elbow with 1/16" restriction (forwardmost, Part No.
415-48101-40).
A Sanders Price List of January 15, 1954 lists this as a AN844-4DS,
which would be a 1/4" aluminum 45 degree hose elbow (the "S" meaning
"special" by having been closed off completely and then drilled with
a 1/16" hole). Back then it cost $1.90!
If your fuel hoses have been converted to the "aircraft type, your
restrictor fitting is likely a AN823-4D similarly modified (no
Ercoupe part number).
There is nothing visible on the outside of such fittings to confirm
the presence of an internal 1/16" restriction.
Regards,
WRB
--
On Sep 7, 2010, at 01:11, Linda Abrams wrote:
> Lee,
>
> Where is the restrictor you mention? Is it a part built into the
> fuel pump? Or is it a separate thing that one should see between the
> fuel pump and the rubber fuel line that goes from the fuel pump
> toward the header tank? Thanks --
>
> Linda
> -----------------------
> "...The fuel pump capacity even with the restrictor in the discharge
> line is more that the engine consumes, so the fuselage tank gets more
> input than the engine consumes."
