Message-ID: <FDD045B6B83FD311A9880090273053E20B65F0@CDIM-PTS-MAIL>
From: "Rumburg, William" <wrumburg@cdicorp.com>
To: "'lancair.list@olsusa.com'" <lancair.list@olsusa.com>
Subject: RE: LNC2 fuel transfer; gas strut
Date: Mon, 7 Feb 2000 11:22:20 -0500 
Mime-Version: 1.0

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	[Michael A. Fopp...]
>  It took 4 minutes to transfer 1 US Gal.  This seems a
> long time to me and means that at 7 gph the pumps are going to be on over
> half the time!  Can anyone enlighten me further of the time it takes in
> their aircraft.  
	Michael -
	   In order to maintain fuel balance in both wings and accomplish
fuel transfer more rapidly, I always turn both fuel pumps on together. I
have a sight gauge for my 10 gallon header tank and generally initiate fuel
transfer at 1/2 tank depletion.
	(You can view my sight gauge on my webpage
http://sites.netscape.net/wrumburg/homepage.html )
	   At 8 - 10 gph fuel burn, it takes about 30 minutes to deplete 1/2
tank, then about 10 minutes to refill with both pumps on. The fuel pumps
then have about a 25% duty cycle.
> On the matter of Dynafocal mounts - I do not understand how Vern can say
> that they are the same.  The geometry of the mounting points is very
> different.
	   With regard to DynaFocal engine mounts, they are designed so that
the focal point of the four mounting bolts is(approximately) the the center
of mass of the engine/prop combination. The Type II was developed
specifically for the Twin Comanchee, because it's long prop extension
resulted in a considerably more forward center of mass.  
	Bill Rumburg
	N403WR  (Sonic bOOm)
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