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  #21  
Old 05-11-2010, 02:08 PM
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Phil Phil is offline
 
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I'm not even speculating that this was a cause, but these are the other 10's that you asked about.

Do other RV models have the same design of a shared airspace for fuel and flaps??

Getting setup for approach in IMC.
"The pilot-in-command's in-flight loss of control due to spatial disorientation."
http://www.ntsb.gov/ntsb/brief.asp?e...22X00528&key=1


Enroute Crash
"The pilot's loss of control for undetermined reasons."
http://www.ntsb.gov/ntsb/brief.asp?e...17X00316&key=1

Last edited by Phil : 05-11-2010 at 02:10 PM.
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  #22  
Old 05-11-2010, 02:14 PM
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Quote:
Originally Posted by Phil View Post
Do other RV models have the same design of a shared airspace for fuel and flaps??
Yes, but as far as I know, the 10 is the only one with the tunnel. In the other models, the shared space is the cockpit itself.
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  #23  
Old 05-11-2010, 02:33 PM
1:1 Scale 1:1 Scale is offline
 
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I've been thinking a bit over the past couple of days about running my fuel lines outside the cockpit on my -7. The plan was originally to have an electric pump in each wing root similar to Frankh (I think). I've never really been a fan of running fuel through the cockpit anyway, let alone pressurized, so I think with some of the taildraggers, it wouldn't take much more than an oversized gear intersection fairing to cover fuel lines going from the leading edge of the wing to the cowling.

I'm still a ways away from any of that plumbing, but does this sound even remotely feasible?
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  #24  
Old 05-11-2010, 02:36 PM
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Quote:
Originally Posted by 1:1 Scale View Post
I've been thinking a bit over the past couple of days about running my fuel lines outside the cockpit on my -7. The plan was originally to have an electric pump in each wing root similar to Frankh (I think). I've never really been a fan of running fuel through the cockpit anyway, let alone pressurized, so I think with some of the taildraggers, it wouldn't take much more than an oversized gear intersection fairing to cover fuel lines going from the leading edge of the wing to the cowling.

I'm still a ways away from any of that plumbing, but does this sound even remotely feasible?
Would you just not run a fuel valve, or do you intend to install the valve outside the fuse also, and remote the control handle inside somehow??
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  #25  
Old 05-11-2010, 03:17 PM
1:1 Scale 1:1 Scale is offline
 
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I was thinking I'd just have a switch to turn either pump on or off similar to what I've seen someone else post. I think a third pump could be mounted on the firewall, what could pull fuel through a failed pump (possibly. I still have a lot to learn in this area). I thought the vent lines could just use the Rocket coil trick, so no vent lines in the cockpit either.....
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  #26  
Old 05-11-2010, 04:15 PM
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My Hiperbipe used to have the fuel selector mounted ahead of the firewall. The handle simply had a long tube extension between cockpit and valve.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

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  #27  
Old 05-11-2010, 04:32 PM
szicree szicree is offline
 
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I don't think more connections ahead of the firewall is the answer. Let's face it, a leak under the hood is almost sure to cause a fire, whereas one in the cockpit will probably just stink (as long as nothing ignites it). Try as we might, I don't think we can ever build planes that are guaranteed not to leak somewhere. The trick is to keep heat and spark away from said areas.
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  #28  
Old 05-11-2010, 05:48 PM
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Quote:
Originally Posted by szicree View Post
I don't think more connections ahead of the firewall is the answer...

I agree. That's why I moved the valve inside the cockpit.

As to leaks in flight, I read somewhere that during Dick Rutan's record flight from Alaska to Grand Turk (?) in his Longeze, he developed a fuel leak. As I recall, he was fighting a thunderstorm at night at the time, and ended up landing with an inch of fuel sloshing around the fuselage floor. I remember the story relating that he held is breath and closed his eyes when he finally turned off the master switch- as if that would have helped any.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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  #29  
Old 05-11-2010, 05:52 PM
slyfox slyfox is offline
 
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Quote:
Originally Posted by Toobuilder View Post
I agree. That's why I moved the valve inside the cockpit.

As to leaks in flight, I read somewhere that during Dick Rutan's record flight from Alaska to Grand Turk (?) in his Longeze, he developed a fuel leak. As I recall, he was fighting a thunderstorm at night at the time, and ended up landing with an inch of fuel sloshing around the fuselage floor. I remember the story relating that he held is breath and closed his eyes when he finally turned off the master switch- as if that would have helped any.
I would think if a person knew he had a fuel issue to just lean the engine to stop it and get the heck out and don't touch anything. That's my thoughts anyway.
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  #30  
Old 05-11-2010, 06:02 PM
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For those that are interested, here is the spec sheet on the motor itself.

http://www.alliedelec.com/Images/Pro...N/388-0012.PDF

More info here:
http://www.alliedelec.com/search/pro...px?SKU=3880012

FWIW, The motor does have (copper-graphite) brushes and I just ran mine in a pitch black room to see if I could get a visual on any spark. No joy on finding one.

I'm guessing a brushless equivalent would be less likely to spark if a sealed version isn't available.

Phil

Last edited by Phil : 05-11-2010 at 10:11 PM.
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