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Old 07-17-2018, 10:47 PM
rv9builder rv9builder is offline
Join Date: Jan 2005
Location: Irvine, CA
Posts: 769

For most RV-12 builders, hoses arenít an option. Because we are registering our planes as ELSA, the aircraft must be built according to the plans. After certification, you can switch to hoses, but at that point youíve already installed the tubing specified by Vanís, so thatís not likely to happen. Other RVs and RV-12s registered as E/A-B do not have to meet this requirement.
RV-12iS Fuselage
RV-9A Project: Sold

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Old 07-18-2018, 12:33 PM
Aircraft Specialty Aircraft Specialty is offline
Join Date: Jan 2012
Location: Oconomowoc, WI
Posts: 388

Originally Posted by vernon smith View Post
Sometimes optimal weight and traditional aircraft mandates can be sacrificed on the alter of practicality and maintainability. Flexible Teflon hose within braided stainless shielding is way more impact and wear resistant than the run of the mill soft aluminum tubing in your kit. The hose ends are heavier but easier to deal with than bending and flaring tools regardless of make and quality.

All this can be purchased from any of the aircraft suppliers or any of the race car suppliers (at half the cost) that carry the Aeroquip line, which most of them do. Below is a link to an example;

I'm sure others, some with vested interests will disagree, but beyond weight and expense the Teflon SS braided hose and end fittings are superior on almost all respects to bent aluminum tubing. Look in your firewall forward kit and see how much unbent aluminum tubing is included.

There are many others that supply the same items and quality as Aeroquip and there is an active forum member that markets a complete line of exactly what I'm describing. I'm sure he will be glad to make you any Teflon flexible line you might want for a reasonable price.
Vernon and All,

Tom and I have been supplying conductive Teflon hoses for a long time and they are a viable and easy to install option for many builders.

However, we also recognize that there are situations where a flexible conductive Teflon hose is not the ideal solution. For this reason we have invested very heavily in rigid tube equipment. Over the last two years we have set up full CNC tube bending capabilities as well as a coordinate measurement machine which integrates with our tubing bender. This allows us to reverse engineer tubes and build them with extremely high precision.

In doing these upgrades, we are able to offer builders Flex hoses where they make sense, rigid tubes where they make sense, and in some cases a rigid to flex combo hose as we have done with the rv 7-9 Andair Setup and a few others that have not yet been officially announced.

In the case of the RV12iS, we recognize that a lot of builders will want to fabricate their own tubes. Other builders will want to have the option of pre bent (and possibly even pre flared) tube assemblies that they can install right out of the box. Because most builders will want to go the ELSA route, the use of Teflon flex assemblies for this aircraft would not be a viable alternative, unless it is being built as an EAB.

Have a great week and happy building
Steve Tschurwald- Aircraft Specialty LLC (Your source for Custom Parts for Experimental Aircraft), AS FLIGHTLINES (Joint Venture with TS Flightlines)
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Old 10-21-2018, 11:26 AM
Aircraft Specialty Aircraft Specialty is offline
Join Date: Jan 2012
Location: Oconomowoc, WI
Posts: 388

Van's has finally begun shipping Engine kits and we have now been able to do fit verification tests on our CNC bent Rigid Tube kit for the RV-12iS.

AS Flightlines has decided to offer the F12127E, F, G, H, J, and K lines. They will come pre bent and pre flared. The cost of the kit is $324.95, and we will be happy to buy back the unused AN Nuts and Sleeves from customers for $25 that won't be needed if you purchase this package.

In addition, we will offer the F12127B and F12127C lines for those customers that have not yet completed the bottom skin installation in Section 21. These tubes need to be slid through the bulkhead into place and then flared by the customer due to going through a grommet. The only way to offer these lines pre bent is to install them at this point in the build. These tubes will add $75 to the cost of the above package.

Below are some pictures of the pre bent tubes as well as what they look like once installed.

If you would like to see the design/fabrication process of these tubes, more information can be located at under the "Rigid Tube" Section.

Have fun building!!!

Steve and Tom

Steve Tschurwald- Aircraft Specialty LLC (Your source for Custom Parts for Experimental Aircraft), AS FLIGHTLINES (Joint Venture with TS Flightlines)

Last edited by Aircraft Specialty : 10-21-2018 at 06:12 PM. Reason: Added Picture
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