Overview
The installation of the fuel selector was governed by the ergonomics of the fuel selector location. Originally factory selector was located on the floor in front of the pilot and the builder found this personally unsuitable, since then this has been revisited by the factory and raised up in a new counsel.
The location and reasoning was outline in a previous blog in March 2016.
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| Factory selector location - all the lines are located under selector panel |
Installation
The lines are fabricated with 5052-0 aluminium tube, flared using a 37 degree flaring tool. All fittings are aluminium AN 6 with the specialty fittings manufactured by Aero-Flow and other suppliers. The use of specialty fittings was required to obtain the necessary radius's and connections within the available space as these cannot be achieved with tube and hand tools.
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| The 45 degree fitting on the fuel return are to be replaced with two [2] x 90 degree fittings to remove a foul with the undercarriage trailing arm |
A Facet pump was used to allow the use of AN fitting through the firewall installation.
All threads have a drop of thread locker to prevent slippage and to act as a lubricant at assembly
All lines are covered with 3/8'' fire sleeve achieving a tight fit on the aluminium tubing with all ends dipped into high temperature silicon diluted with Acetone. Excess material was then wiped onto the end and worked in using a scrap piece of tubing.
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| Preparing hose end - note the fit to the tube |
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| Fitting last nut to assembly All ends will be sealed with 12 mm worm drive clamps |
Overview
The result meet the original design requirement but there is a caveat. With the mount moving back 30 mm and the tight interface with the undercarriage a large amount of precious space was lost. In particular a custom air filter installation will be now required and a few more fittings added to clear the undercarriage trailing link.
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