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1. 05:03 PM - Tip tanks (Len Loudis)
2. 08:55 PM - SEC: UNCLASSIFIED Re: Tip tanks (owner-rv7-list-server@matronics.com)
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--> RV7-List message posted by: Len Loudis <n713ml@yahoo.com>
I would welcome thoughts on installation of tip tanks on my -7A. Given
my mission for the plane, that is my intent. I am less certain about
plumbing into QB wings (still open), whether there are alternatives to
the Johannsen tanks (as listed in the Vans catalog), and so forth. So
please feel free to ramble on. Any thoughts will be fresh at this
point.
Thanks, Len
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Message 2
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--> RV7-List message posted by:
Subject: SEC: UNCLASSIFIED RE: RV7-List: Tip tanks
Len,
I am going for the Johanson tanks, which are now in production for the RV7/8
sheared tips. I saw the prototype and they look excellent quality. Price is
A$3500.00.
There are alternatives:
Roll your own tips by installing a membrane or coating in the Vans tips, and
add necessary bulkhead, filler, drain and exit plumbing, & nav lights if
applicable. The Vans tips are permeable to fuel. So the membrane, coating &
bulkhead will reduce your fuel capacity by a litre to two compared to the
Johanson tanks, which are made of fuel proof fibreglass.
Also someone somewhere installed a aluminium pipe tank in the leading edge
of a RV. Very neat, holds about 8USG each, the tube tank slides into the
leading edge rib lightening holes.
Both the Johanson and tube tanks do not seem to require strengthening of the
outer spar. These options are cheap but labour intensive.
VH-VIL has tip tanks plus two aluminium wedge shaped tanks that fit in the
triangle behind the seat backs, just over the flap mechanism. They are
removable and leave most of the baggage compartment free for, guess what -
baggage. Easy to build in aluminium, cheap, but gives aft c of g and also
reduces your baggage weight allowance. Fuel in the wings & tips is the most
structurally efficient place to carry fuel due to lack of wing bending
moment. These tanks were very neat and well thought through.
I have also seen one Australian RV6 with four leading edge tanks. He wishes
to fly to Oshkosk across the big puddle. With 80 odd usgallons per wing he
had to strengthen his outer wing spars and his bladder. He has a removable
tank for the right seat giving over 20 hrs endurance. He is thinking of a
sleeper seat too!
Regards, David Francis, tipping the canoe of VH-ZEE, Canberra, Australia.
-----Original Message-----
From: Len Loudis [mailto:n713ml@yahoo.com]
Sent: Thursday, 17 July 2003 10:03
To: rv7-list@matronics.com
Subject: RV7-List: Tip tanks
--> RV7-List message posted by: Len Loudis
<n713ml@yahoo.com>
I would welcome thoughts on installation of tip tanks on my
-7A. Given
my mission for the plane, that is my intent. I am less
certain about
plumbing into QB wings (still open), whether there are
alternatives to
the Johannsen tanks (as listed in the Vans catalog), and so
forth. So
please feel free to ramble on
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