I believe most use Adel with rubber guards.
I believe most use Adel with rubber guards.
I used a combination of adel clamps and zip ties on the rubber fuel hoses.
Jim Ott
Portland, OR
Kitfox SS7 flying
Rotax 912ULS
Here is the info from AC-43.13-1B:
b. Routing. Make sure that the line does not chafe against control cables, airframe structure, etc., or come in contact with electrical wiring or conduit. Where physical separation of the fuel lines from electrical wiring or conduit is impracticable, locate the fuel line below the wiring and clamp it securely to the
airframe structure. In no case should wiring be supported by the fuel line.
d. Bonding. Bond metallic fuel lines at each point where they are clamped to the
structure. Integrally bonded and cushioned line support clamps are preferred to other clamping and bonding methods.
f. Support clamps.
(1) Place support clamps or brackets for metallic lines as follows.
Tube O.D. . . . . . . Approximate distance between supports
1/8”-3/16”--------------------------------- 9”
1/4”-5/16”--------------------------------- 12”
3/8”-1/2”----------------------------------- 16”
5/8”-3/4”----------------------------------- 22”
1”-1 1/4”----------------------------------- 30”
1 1/2”-2”----------------------------------- 40”
(2) Locate clamps or brackets as close to bends as possible to reduce overhang. (See figure 8-12.)
These comments are from me:
Notice they say cushioned clamps are the preferred method (i.e. adel clamps). They also touch the metal line to do the bonding to the airframe.
FYI tie wraps are bad on metal fuel hoses as they can chaff and make a weak spot or hole.
Phil Nelson
A&P-IA, Maintenance Instructor
KF 5 Outback, Cont. IO-240
Flying since 2016