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  #11  
Old 10-27-2010, 04:58 AM
pierre smith's Avatar
pierre smith pierre smith is offline
 
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Location: Louisville, Ga
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Default Contact Tom Swearingen..

...at TS Flightlines. All he needs is lengths and diameters. He recently made me new stainless braided, firesleeved hose with stainless fittings for my -10, fuel and oil lines, for only $389!!

http://www.tsflightlines.com/

Best,
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  #12  
Old 10-27-2010, 08:45 AM
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Default

In our area we have a chain of hydraulic/pneumatic hose & fittings shops called Calliflower. I'm sure there are similar types of places in your area. They deal with all types of hoses and fittings for the trades and are extremely reasonably priced compared to the usual suspects.

When I've needed hoses I go there and have them custom made. They will also pressure test the hoses for you. They have so many different types of hoses and fittings its like a candy store for guys like us.
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  #13  
Old 10-27-2010, 01:39 PM
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Danny King Danny King is offline
 
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Default Christen special fittings

Iron Flight,

Make sure you get the special plug for the oil feed line at the swivel fitting, the special positive G lower sump pickup fitting, and oil return/ inverted breather sump fitting.

I also recommend you switch from the standard inverted oil pickup to the vacuum pump pad inverted oil pickup fitting. I got that one from Bart at Aero Sport Engines.
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  #14  
Old 10-27-2010, 02:32 PM
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Toobuilder Toobuilder is offline
 
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Default

May be just one data point, but be very aware of the hose you do use. When I bought my Hiperbipe one of the hoses found chaffed on the pre buy inspection. A new hose was fabbed on the spot with brand new off the roll Aeroquip hose by an A&P. 3 hours into the flight home, my oil pressure dropped to ~30 PSI, requiring a landing at the nearest airport. Long story short, the new hose collapsed on itself internally due to suction (no visible defect from outside) and seriously restricted flow. I've never even heard of that before.

Based on this, this is one area where I think it's good to buy high quality hose from the start (and another reason why I avoid hose unless absolutely required).
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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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  #15  
Old 10-27-2010, 05:16 PM
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frankh frankh is offline
 
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Default What?

I'd be very interested in what is causing so much suction to collapse the hose in the first place.. Its not normal to deisgn an oil sysytem that will make that much suck..Reason being is if you get any kind of leak you could airlock your oil pump and seize the engine.

Sure you didn't have a partially plugged strainer at the end of that pipe?

Frank
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  #16  
Old 10-27-2010, 05:27 PM
Toobuilder's Avatar
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The strainer is between the hose and the pump. Even if clogged, that would lessen the suction seen by the hose. It failed because it was bad hose.
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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
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1984 L39C
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  #17  
Old 10-27-2010, 06:18 PM
TS Flightlines TS Flightlines is online now
 
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Default Michael--what kind

of hose was the one that collapsed?
Tom
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  #18  
Old 10-27-2010, 07:23 PM
Flybipe Flybipe is offline
 
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Default "And do make your own hoses - they are the exact same thing!"

Oh, and when you do make your own hoses for your certified Christen inverted oil system and your engine siezes because you used the wrong hose or fitting from Walmart and it failed, starving the engine of oil, Aviat's gonna get dragged into court on that one too!

Sue first, settle later!

Given the nearly 1:1 ratio of lawyers-to-idiots in this country, it's amazing anyone manufactures anything anymore : )
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  #19  
Old 10-27-2010, 08:18 PM
Toobuilder's Avatar
Toobuilder Toobuilder is offline
 
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Quote:
Originally Posted by TS Flightlines View Post
of hose was the one that collapsed?
Tom
Don't know the PN, but it was not teflon lined... Just basic rubber with stainless outer braid. Looks like Stratoflex 156.

I still have the hose to show people who stop by the hangar.
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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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  #20  
Old 10-29-2010, 12:15 PM
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Tom (and anyone else),

Here's pictures:



#10 hose as removed from the airplane. One fitting removed in an attempt to figure out what happened.



Cut hose. Failed area is about 4 inches long - starts about 2" from the fitting end.



Section through the failed area.

Airplane has 1600 hours on it with no failure of this kind before or since. I suspect a bad batch of hose.
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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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