Thanks Russell,
I am just now installing the Dukes pump and noticed the warning
about intermittent use. This concerns me because over the last few weeks I’ve
followed the chat strings discussing flight procedures where the Low Boost was
left on as a normal procedure. Seems like a potential problem. But then again
the tolerance on most of these components is so large that I thought perhaps continuous
Low Boost must be OK.
Does the Weldon pump have both low and high boost. How does it
compare in price to the $960 Duke. I waited over a year for this pump through
Lancair and finally bough one from a builder.
Regards
Stan Fields
Legacy #201
www.lancairlegacybuilder.com
From: Lancair Mailing
List [mailto:lml@lancaironline.net] On Behalf Of Russell
Sent: Wednesday, September 08, 2010 10:49 AM
To: lml@lancaironline.net
Subject: [LML] Dukes fuel pump problem follow-up
Everyone
thanks for your response.
After
lengthy evaluation and communications with Dukes and CJ aviation I have learned
the following.
The
Dukes pump is designed for “intermittent duty only” and is not a
self priming pump. It does not have a thermal overload relay. I also found out
that the tolerances in the pump are not well controlled.
Unfortunately
I have been unable to reproduce the failure that I experienced last week. All
electrical connections check out properly. The aircraft only has 140 hours on
it.
I
have decided to replace the Dukes pump with a Weldon pump.
The
Weldon pump is designed for “continuous duty” and is self priming.
These are two big advantages over the Dukes. Also the tolerances are well
controlled.
I
have ordered the Weldon pump with electronic controller from CJ Aviation. I
will have the pump by the beginning of next week. Which is a much better
delivery time than getting a Dukes.
Regards
Russell
Steiner
N2AA,
legacy
original
posting.
Has
anybody run into this problem?
Yesterday
after flying into a field the Dukes of electric fuel pump would not run at all.
I was forced to leave the aircraft at the field because I couldn't get the
engine started.
The field
elevation was 1300 feet and it was close to 90°. The density altitude was about
3000 feet for the day.
Today I
returned to the field tools in hand to carry out a rescue. Surprisingly the
electric fuel pump worked!? Why?
I was
able to fly the aircraft home.
I
concerned about flying the aircraft until this issue is diagnosed and resolved.