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  #1  
Old 07-09-2013, 08:59 AM
gfr56md gfr56md is offline
 
Join Date: Aug 2005
Location: Annapolis MD
Posts: 22
Default RV-8 rear baggage smoke tank?

Looking for any information on experience with a low profile rear baggage area smoke tank.
Jerry
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  #2  
Old 07-09-2013, 03:00 PM
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Bob Ellis Bob Ellis is offline
 
Join Date: Jul 2007
Location: Pembrokeshire, UK
Posts: 224
Default

Hi Jerry. If you have your battery on the firewall you could build a custom one to go on the rear battery tray - see here
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  #3  
Old 07-09-2013, 08:35 PM
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panhandler1956 panhandler1956 is offline
 
Join Date: Jun 2006
Location: Ohio
Posts: 1,686
Default Here's mine

Go here to see my installation. I still haven't finished the system FWF.

http://www.mykitlog.com/users/displa...104019&row=234

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RV-8 'Contrary Mary' flying
N784DE S/N #82614

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  #4  
Old 07-13-2013, 05:07 PM
Traash Traash is offline
 
Join Date: Apr 2007
Location: Montgomery, TX
Posts: 43
Default Tank

The previous system looks a little difficult to service. I have my battery in back and a 6 gallon tank strapped to the floor. With oil it would be dofficult to lift onto the shelf and may be a bit heavy for the shelf. Pump is attached to tank. I take it out to service or when I don't need it. Hydraulic quick disconnects on supply and vent and a molex plug for electric. Been blowing smoke for 8 years.

Just had a new issue come up. I clean my nozzles at annual but noticed weak smoke. Found the AN fitting attached to the nozzle had coked up. Makes sense. It's exposed to the same heat as the nozzle.
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  #5  
Old 07-19-2013, 07:31 AM
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n747jg n747jg is offline
 
Join Date: May 2005
Location: Evergreen, CO
Posts: 48
Default Smoke oil tank aft on RV-8

Just curious why the aft location? It seems to me the RV-8 front cargo is the primo location of any of the RV models, for many reasons. It's closest to the center of gravity of the airplane. I notice no difference whether the tank is installed or not, full or empty. It's MUCH easier to fill, you don't have to move a seat and who knows what else to get at it, so it's more convenient and you'll be less likely to spill oil all over your airplane. The tank is much easier to remove if you just want it out of the airplane. Front cargo offers a much shorter and easier routing for the plumbing, you don't have to find a way to get around the main spar. And with a 35 to 40 pound tank, times 6 G's, that's a lot of weight to support, right above your elevator push pull tube.

Jim Gray
www.rmrairshows.com
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  #6  
Old 07-19-2013, 08:56 AM
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Kahuna Kahuna is offline
 
Join Date: Dec 2004
Location: Gold Hill, NC25
Posts: 2,400
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Quote:
Originally Posted by panhandler1956 View Post
Go here to see my installation. I still haven't finished the system FWF.

http://www.mykitlog.com/users/displa...104019&row=234

Serviceability aside, a remote fill on the fuse would work fine here. However, as others have mentioned, that is pretty far back and would absolutely be a CG nightmare. IF it were a fixed weight, well it could be compensated for in other ways. However, given that the weight will go from being there, to not being there, that would greatly impact the flying characteristics over the flight envelope in a short period of time.
FWD baggage has its issues, primarily with leaks, spills, and taking up valuable useful space. I understand the logic of getting it into an otherwise unusable space.. However, I do not like this solution.
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  #7  
Old 07-19-2013, 09:13 PM
flynwest flynwest is offline
 
Join Date: May 2008
Location: Sacramento
Posts: 377
Default Front smoke tank

I put mine in the well of the forward baggage 3 gallon tank works great. Pull it out in 3 min. quick connectors and oil and electric.
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  #8  
Old 07-20-2013, 05:17 AM
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panhandler1956 panhandler1956 is offline
 
Join Date: Jun 2006
Location: Ohio
Posts: 1,686
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Quote:
Originally Posted by Kahuna View Post
Serviceability aside, a remote fill on the fuse would work fine here. However, as others have mentioned, that is pretty far back and would absolutely be a CG nightmare. IF it were a fixed weight, well it could be compensated for in other ways. However, given that the weight will go from being there, to not being there, that would greatly impact the flying characteristics over the flight envelope in a short period of time.
FWD baggage has its issues, primarily with leaks, spills, and taking up valuable useful space. I understand the logic of getting it into an otherwise unusable space.. However, I do not like this solution.
Kahuna,
Good points! I forgot to mention that I have an external filler port for this tank. My airplane runs right up against the fwd CG limit with just me in the airplane so it flies much better with the tank full. In my testing, it goes from flying great to good over the range between full and empty, which is definitely a consideration. The the other challenge I have with this location is draining it if I want to haul a larger passenger - I haven't solved this yet, just need to get it done.

You are correct, it's not the perfection solution, just another option.
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EAA Chapter 9 Tech Counselor/Flight Advisor
Columbus, OH
RV-8 'Contrary Mary' flying
N784DE S/N #82614

www.fixedwingbuddha.com
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  #9  
Old 07-20-2013, 07:00 AM
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n747jg n747jg is offline
 
Join Date: May 2005
Location: Evergreen, CO
Posts: 48
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Quote:
Originally Posted by panhandler1956 View Post
The the other challenge I have with this location is draining it if I want to haul a larger passenger
Put a bucket under the exhaust and pump it out.

Gringo
www.rmrairshows.com
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  #10  
Old 07-20-2013, 02:36 PM
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panhandler1956 panhandler1956 is offline
 
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Location: Ohio
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Quote:
Originally Posted by n747jg View Post
Put a bucket under the exhaust and pump it out.

Gringo
www.rmrairshows.com
Good idea!
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EAA Chapter 9 Tech Counselor/Flight Advisor
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RV-8 'Contrary Mary' flying
N784DE S/N #82614

www.fixedwingbuddha.com
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