Reply-To: <steve@tsisp.com>
From: "Steve Brooks" <steve@tsisp.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Fuel pump switches (was: mainfold hose)
Date: Wed, 17 Mar 2004 22:23:51 -0500
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Dale,
I had seen this fuel set up earlier when I was investigating which way to do
mine.  I decided to go wit the plans fuel valve, but mine will (except for
an emergency) remain on the left tank.  I pull from and retune fuel to the
left tank., I have a transfer pump to get fuel from the right tank to the
left tank.

I think that while I'm at S&F, I'll get a locking toggle switch to control
the primary fuel pump.  That way I don't have to worry too much about it.  I
have a similar switch on my emergency electrical transfer where I can turn
off the master switch but still provide critical engine systems with power
from either battery.

Thanks for the suggestion,
Steve

 -----Original Message-----
From: 	Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]  On
Behalf Of Dale Rogers
Sent:	Wednesday, March 17, 2004 5:37 PM
To:	Rotary motors in aircraft
Subject:	[FlyRotary] Fuel pump switches (was: mainfold hose)

 << File: fuelswitch.jpg >> << File: fuelcontrols.jpg >> << File:
ATT00280.txt >> Steve,

   Re:

> I was interested in the switch idea on the fuel pump.  I have my auxiliary
> pump on a switch, but my primary pump runs as long as the master switch is
> on.  I was concerned about having a switch on the main pump that could be
> accidentally turned off in flight.

> ...
> I may want to consider putting one on, though it would have to be located
> where it wouldn't get shut off accidentally.

   Only two practical methods of achieving that come to
mind - one is to ward the switch(es) with "ears"; and the
other is to mount the switch(es) in a recessed section of
your panel, such that nothing much larger than a finger
could get onto or behind the toggle arm.

   Warding is pretty easy.  Just buy some 3/4" aluminum
channel stock and cut off about an inch - you shouldn't
need more, you only have to ward one end of the throw, so
you can drill the hole for the switch shaft off-center
(lengthwise).  Rocker switches are a little more trouble,
as you have to cut a rectangular hole in the base of the
channel (and you'll have to buy wider channel.

   Of course, don't leave any corners on sharp edges to
snag things on (such as your hide).

   Another possibility is a variant of the fuel valves
used by Marc and Nadine Parmelee:

 http://www.marcnadine.com/fuelvalve.html

   I'm thinking of adding a cam-operated switch to each
control - valve open, pump is on; valve closed, pump is off.

Dale R.
COZY MkIV-R #1254