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1. 08:13 PM - Re: RV-4 Weight & Balance with The Whirlwind Model 151 (Chuck Borne)
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| Subject: | RV-4 Weight & Balance with The Whirlwind Model 151 |
Thanks, Smokey. I think you're going to get spoiled (and addicted) by that
big-engine mutant -4! Then you won't be able to go back to lower
horsepower. :-)
Chuck
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[mailto:owner-rv4-list-server@matronics.com] On Behalf Of rob ray
Sent: Sunday, July 16, 2006 10:01 PM
Awesome Chuck, back in the day (1996) I gave a ride in my then 150 HP Sterba
wood propped RV4 with no paint at a whopping 935 lbs soaking wet to a 250
pounder who helped me. I put my tool box on the pedestal bewteen my legs,
full fuel and a long runway at Newport News VA but all was for naught. The
Bandit flew fine with just a little pitch sensitivity and forward trim...Now
that I am flying the Harmon Rocket, all bets are off...bring on the big
dudes!!!
(and girls...ha!)
RR
Chuck Borne <caborne3@charter.net> wrote:
I don't know if anybody's been here yet with the WW 151 but I thought I'd
pass along some numbers regarding this setup.
First of all, I was pleased that my empty weight turned out almost in the
middle of the range I was hoping for (950-975). It ended up at 967 lbs with
the empty CG at 68.9" AOD on an O-320-powered -4. Other weight savings
items I utilized were the Odyssey PC625 (13.2 lbs.) battery (it cranks the
Sky Tec just fine) laying on its side in the left floor compartment ahead of
the wing spar, Sky Tec starter, B&C 40A alternator with Nuckoll's Z-1
electrical system and the Ellison EFS-4 throttle body injector. I even have
a full vacuum gyro panel but not set up for IFR with just a GPS/COMM and
transponder only in the center stack under the main panel.
What was interesting was the full-tank fuel burn scenario of me at 225 and a
120-lb. rear passenger (no baggage) with the CG moving aft only 4/10's of an
inch over the burn down to 5 gallons total left in the tanks. Even the
worst overloaded case of myself and a 245-lb. rear-seater had the CG a hair
forward of the aft limit (77.4") with 5 gallons left.
So it looks like the WW 151 will be a good match with this airframe. Now
for first flight! :-)
Chuck Borne
RV-4, N353CB
Vans S/N-4069
Waiting-for-FAA
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