REFLECTOR: 2 Speed Dukes Fuel Pump

[Scott Derrick]

I used to know that as its the same for my 520. The low pressure is 
between 16-19 psi, The high is think was about 28-30...

It's a b**** to get the electrical backup to work in flight because you 
have to change the mixture with any power/rpm change.

I opted to go automotive(racing) single pressure 16 psi carbon vane 
pump, as that is the pressure you use for an in flight mech pump failure.

I think I have the data on the Duke at the airport in the overhaul 
manual.  I can check it next time I'm there if nobody else chimes in.

Scott
-------- Original Message --------
Subject: REFLECTOR: 2 Speed Dukes Fuel Pump
From: Brooke Wolf <bwolf1 at tds.net>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Date: 12/16/2010 05:01 AM

> Does anybody know the pressure ratings for the High/Low positions of the
> 2 speed Dukes fuel pump used in TCM-550 installations?
>
> Thanks
>
> Brooke
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