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09-23-2015, 06:48 PM
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Join Date: Jun 2011
Location: Indianapolis
Posts: 228
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Guys:
I'm at the decision making point on this and I will be mounting the battery on the firewall. I just purchased the 2 bladed Hartzell with the 8301 composite blades. This prop is in the neighborhood of 7 to 9 pounds lighter than the metal blended airfoil blades, which makes this move a no brainer for me. It's a win, win, win. No #2 gauge wire run from back to front, lighter battery (an Earth-X) on the firewall, and the battery closer to the starter. I talked to one of the Hartzell engineers and he says the prop will handle high compression pistons, and dual LSE ignitions no problem too (It's the hub/blade combination that Kahuna has been flight testing). If I need ballast in the back, it will be the little tool kit I usually carry around everywhere in my 8 now. You can make them as heavy as you want :-).
__________________

Larry Anderson
Indianapolis
RV-Super 8 N88XT SOLD
RV-10 QB N38LA Flying
Helicopter Instructor Pilot
Standardization I.P.
Instrument Examiner
U.S. Army Retired
EMS Pilot for LifeLine
At IU Health Retired :-)
Although Exempt,
Donated for 2020
Last edited by BlackhawkSP : 09-23-2015 at 07:41 PM.
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09-23-2015, 09:12 PM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,189
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I like it!
Jesse...
I agree with the fried food/diet coke example! The point of my post, however, was to illustrate a point. I would think that most people who build a -10 are not going to be as concerned with the weight as someone building a racing machine. They are typically building a comfortable cross country machine, hence the example of the interior, leather, etc. I just think it is kind of funny that people would be concerned with a couple of pounds of wire and then add 25 or more pounds of creature comforts and not even say a word...
Note that I am not saying it is WRONG to consider moving the battery, in fact I kind of wish I had...
__________________
Bob
Aerospace Engineer '88
RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
EFII System 32 - Done
297 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...
Dues+ Paid 2019,...Thanks DR+
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09-23-2015, 09:21 PM
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Join Date: Jan 2005
Location: Clarion, Pennsylvania
Posts: 550
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Rocketman, do you actually know anyone that fits the sterotype you find so amusing?
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-Andy Turner
RV-10 N784JC
Last edited by aturner : 09-23-2015 at 09:53 PM.
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09-23-2015, 10:10 PM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,189
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Yep.
Yes, I do.
I also frequent these forums enough to know that there are others out there concerned about saving a couple of pounds on wire and then add 10 times that in other accessories.
Don't believe me? Check out the poll results for weights...
Sorry if you don't see the humor in it...no offense was meant.
__________________
Bob
Aerospace Engineer '88
RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
EFII System 32 - Done
297 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...
Dues+ Paid 2019,...Thanks DR+
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09-28-2015, 09:09 AM
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Join Date: Aug 2015
Location: Hurricane Utah
Posts: 156
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Thank Larry...:-)
Thanks Larry, great plan on the battery & overview of your weight balance analysis, the numbers will look great on the CG I am sure! I am still holding my breath on the lithium batteries, I am chemist, worked on batteries here and there, and just for me, waiting to hear a few more success stories (like yours!) of long term use and stability.... by the time I get to the battery install who knows, like to see things change and tried for better safety and performance.
Cheers, Mike
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09-28-2015, 12:14 PM
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Join Date: Jun 2014
Location: oregon
Posts: 94
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I put the battery on the firewall (composite prop - A/C combo). However, I ran the #2 wire to the original tail battery location. This gives me the option to change locations or run two batteries. As an added bonus I installed the Aircrafters LLC APU install kit (right of bag door - short cable runs). I have used the APU for many hours of panel/fuel/light/etc.. setup/testing using a 50 amp Redbox. The Apu can also be used for long term battery maintenance (I use the battery minder - this scenario was confirmed by Concorde directly).
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10-01-2015, 05:46 PM
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Join Date: Aug 2015
Location: Hurricane Utah
Posts: 156
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Thank you, another great example...
evolution10,
Really begs us to consider composite prop & B/C alternator, opens up options. Like you, I have always enjoyed remote AND easy battery access, sometimes at/on a distant airport, sometimes in my own hanger....
Thank you very much for chiming in on the thread.
Cheers, Mike
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