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  #1  
Old 03-02-2007, 03:59 PM
dekky111 dekky111 is offline
 
Join Date: Aug 2005
Location: Grand Rapids, MI
Posts: 107
Default Flexible brake lines

N811AK

Looking to put a flexible line section between the calipers and the solid line up the gear leg. Need advice for which hose to use.

dekky111
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  #2  
Old 03-02-2007, 05:24 PM
Captain Avgas Captain Avgas is offline
 
Join Date: Oct 2005
Location: Melbourne, Australia
Posts: 1,868
Default

Quote:
Originally Posted by dekky111
N811AK

Looking to put a flexible line section between the calipers and the solid line up the gear leg. Need advice for which hose to use.

dekky111
The correct hose to use will be Aeroquip 303 (3000 psi medium pressure aviation grade hydraulic hose) with Aeroquip 491 hose fittings.

Some people use low pressure fuel line hose, other buy cheap Chinese auto hoses with no pedigree. Go with the 303 and correct fittings and you can rest assured you have the best.
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  #3  
Old 03-02-2007, 05:52 PM
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Radomir Radomir is offline
 
Join Date: Jan 2005
Location: Charlotte, NC
Posts: 1,523
Default

I used Earl's SpeedFlex hose with appropriate fittings. Comparable to the Aeroquip hose mentioned above..
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RV-7A sold
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  #4  
Old 03-02-2007, 07:05 PM
kenmorris kenmorris is offline
 
Join Date: Mar 2005
Location: McKinney, Texas
Posts: 65
Default

33 1/2 " long. This is for a RV7/A
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  #5  
Old 03-02-2007, 07:19 PM
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pczar3 pczar3 is offline
 
Join Date: Jul 2005
Location: Bolingbrook, Illiniois
Posts: 254
Default Brake Lines

I have used the Racing brake lines from Pegasus. 3000 pound rating and an overall SS braid. You can make your own without special tools or buy pre-made hoses. It is size -3.

http://www.pegasusautoracing.com

pczar3
Paul
N694BP - reserved
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  #6  
Old 03-02-2007, 08:32 PM
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tommylewis tommylewis is offline
 
Join Date: Jan 2005
Posts: 769
Default pre made brake lines

I am using a standard product from Pegasus, part number 4-36-S-S, which is a 36 inch size 4 TFE hose with straight swivels on both ends. It fits a RV7a fuselage fitting to wheel brakes prefectly and the cost is $19.99 each. Check it out.

Tom Lewis
RV7a
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  #7  
Old 03-03-2007, 11:21 AM
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frankh frankh is offline
 
Join Date: Jul 2006
Location: Corvallis Oregon
Posts: 3,547
Default or...once again

Go down to your local hydraulics shoppe...If your town has a farm within 50 miles there will be one. They can get you any hose your heart desires at a fraction of the cost of anything with "Aeroquip" printed on it and its good quality stuff.

Frank
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  #8  
Old 03-03-2007, 11:21 PM
Captain Avgas Captain Avgas is offline
 
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Location: Melbourne, Australia
Posts: 1,868
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Quote:
Originally Posted by frankh
Go down to your local hydraulics shoppe...If your town has a farm within 50 miles there will be one. They can get you any hose your heart desires at a fraction of the cost of anything with "Aeroquip" printed on it and its good quality stuff.

Frank

Good quality you say.....well maybe...but how do you know that if there's no manufacturing specification you can validate and the source of the product is unknown. It might just be el cheapo hose and cast fittings from China (and probably is). And if you get lucky and it works OK this time how do you know that you're still buying the same quality next time. At that stage your local hydraulic shop might not be getting their hoses from China...they might be sourcing a better price from Somalia.

When builders buy milspec they're buying QA. After all...it's an aeroplane, not a farm tractor, despite what some people may say about Lycoming engines.
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  #9  
Old 03-05-2007, 04:43 PM
jstiegel jstiegel is offline
 
Join Date: Sep 2005
Location: Vinton, Iowa
Posts: 20
Default brake (farm) line hoses

Builders,
I have been a farmer for a long time. I have had a lot of Hydraulic hoses made by my implement dealer. I have not had one fail that was not abraided by rubbing against some moving part. In other words not one has failed due to the tractors 2,500-3000 psi hydaulic system. There is nothing wrong with the hoses that you can get custom done at a farm implement dealer. Many of the tractors manufactured today use hydraulic pumps from the areo space industry. I.E. aircraft hydraulic pumps.
I don't think you need worry.
Regards,
John Stiegelmeyer
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  #10  
Old 03-05-2007, 06:33 PM
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frankh frankh is offline
 
Join Date: Jul 2006
Location: Corvallis Oregon
Posts: 3,547
Default Hydraulics shoppe

I got the tip from a bunch of airplane builders who consider if they have to go anywhere else other than the Hydraulics place, they have failed.

Remember you won't get aluminium fittings and they hoses they sell are rated higher than the Aeroquip stuff (or so I am told). You also will not get anything but swaged on hose ends.

Anyway the good ole boys from round here cannot point to a single failure in building airplanes since the '60s.

It probably more like Aeroquip de-rate standard hoss and triple the price.

Frank
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