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carl.froehlich(at)verizon
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 Posted: Sat Jun 25, 2011 8:04 am Post subject: RV-List: Fixed pitch to constant speed |
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Craig,
I did this conversion on my 8A about three years ago. After reviewing all the performance data on the various CS props available, I selected the Hartzell blended airfoil. I have an IO-360, 180 hp engine so the engine weigh is the same as yours.
Looking back over my W&B data, I can tell you the Hartzell was 13 pounds heavier than the Sensenich. I have two Odyssey 625 batteries mounted just aft of the firewall. I considered moving one of them to the aft mount location but decided to wait until after flying to see if it I had a nose heavy problem or not. Bottom line, I did not see much difference so I left the batteries where they are.
As I did with the Sensenich, I put a 25 pound shot bag in the baggage compartment if I’m solo and no baggage. My W&B does not require this, but I find it helps.
I can tell you the performance difference between the Sensenich and the Hartzell was far more dramatic than I anticipated. You will love the change. I have a couple of hotrod Lancairs at the airpark and while they eventually pass me, I give them a surprising run for their money.
BTW – I’m using the PCU-5000 governor and am very pleased with it. If you need a governor control cable bracket let me know – I have a new one sitting here I bought from Van’s by mistake for the RV-10.
Carl
RV-8A (650 hrs)
RV-10 (prepping the fuselage for paint)
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Robin Marks
Sent: Saturday, June 25, 2011 10:47 AM
To: rv-list(at)matronics.com
Subject: RE: RV-List: Fixed pitch to constant speed
Craig,
Do you have your battery in the back?
I have an IO-360 200 Hp / Hartzell BA CS prop (great combination) and have no issues flying solo with full fuel or near empty and no weight in the back.
One note I have dual G3X and back up EFIS so I suspect my panel is lighter than a 10 year old build with steam gauges.
Robin
RV-4 Sold
RV-6A Sold
RV-10 225 Hours
RV-8A 30 Hours
From: owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com) [mailto:owner-rv-list-server(at)matronics.com (owner-rv-list-server(at)matronics.com)] On Behalf Of AOL
Sent: Saturday, June 25, 2011 7:31 AM
To: rv-list(at)matronics.com (rv-list(at)matronics.com)
Subject: Re: RV-List: Fixed pitch to constant speed
I have a RV8a with a IO-360 200hp which is a little heavier than your engine plus I have constant speed prop and have been flying it since 2002. That being said I do keep 25 lb. of lead shot in the aft baggage compartment and a few tools which keeps the elevator pretty even or level in flight thus creating less drag. When landing it also helps with a lot less trim. I have confess my best landing are when I have a passenger in the rear seat and nothing in the aft baggage area
Dane Sheahen
RV8a
On Jun 25, 2011, at 9:01 AM, Craig Gallenbach wrote:
I have a RV8A with an O-360 and fixed pitch Sensenich prop. I am considering changing to a constant speed prop, but I am concerned about the added weight on the nose of the plane. My plane is on the nose heavy side as it is, and I would not like to make it any more so. I am looking at the Whirlwind RV series. Does anyone out there know how the installed weight of a Whirlwind prop compares to the fixed pitch Sensenich? The Whirlwind prop and spinner weigh in at about 38# according to the folks at Whirlwind. I was hoping to find out the weight of the Sensenich installation without pulling my prop.
Thanks,
Craig Gallenbach
Eastover, NC
RV8-A, N184CG 195hrs
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gaillard.peck.ctr(at)nell
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| Posted: Mon Jun 27, 2011 5:59 am Post subject: RV-List: Fixed pitch to constant speed |
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Here's a tip for anyone building wing tanks for a RV-8.
A friend building an RV-10 told me about the fuel pickup tube on the RV-10. It has a strainer attached to the pickup end of the tube. That's a real improvement over the pickup tube in my RV-8 plans. My plans say: bend the tube and crimp the end of the tube and then hacksaw 7 or 8 holes about half way through the tube just above the crimp for the fuel pickup.
I ordered the RV-10 tubes from Vans and found them to be a perfect fit and a much niftier way to go. They are nicely bent and come with the compression sleeve and nut already mounted on the flared end of the tube. All that you have to do is screw the nut on the fitting that passes through the inboard tank rib and install the locking bracket.
It was a little tricky finding the RV-10 tubes in the Vans catalogue, but they are there. I forget how much they cost. I think both for $31 or so. Well worth it to me for this important component.
Regards to all.
Gail Peck
RV-8
LAS no N number yet
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