Today's Message Index:
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1. 03:25 PM - Re: Re: NEOPRENE HOSE (Galin Hernandez)
2. 03:43 PM - Re: Re: NEOPRENE HOSE (Scott)
Message 1
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| Subject: | Re: NEOPRENE HOSE |
My TR-4 has the neoprene hose from the wing to the fuselage as per the
plans. One of them started leaking (old age cracking) after 9 years of
use. The hose is very inexpensive so I now have it in my "scheduled
maintenance" to replace the hose very 5years.
On Mon, Mar 23, 2015 at 9:13 AM, mark_trickel <marktrickel@gmail.com> wrote
:
>
> The 3/8 I.D. Neoprene hose included in KIS kits was intended for the fuel
> line connection between the fuel tanks, and the fuselage. The manual is a
> little vague, but there is a drawing of a typical aircraft fuel system
> included in the TR-1 Builders Manual (Airframe Assembly section page 8 ).
I
> did not check, but I am sure the same drawing is in the TR-4 Builders
> Manual. The drawing comes from our faster, sleeker, and much more difficu
lt
> to build cousin, the Lancair 235/320.
>
> The black rubber hose is a very important piece to the KIS aircraft. I ca
n
> think of 2 real important reasons for this hose. First it makes hooking u
p
> the fuel tanks =93 simple. It would be a lot harder to install a me
tal piece
> of tubing in this tight spot. Second when a wing panel breaks off in a
> crash, the neoprene fuel line would separate very easily - you won
=99t have
> to worry about the fuel line whiplashing about the cockpit (hopefully you
> all have plenty of Adell clamps or the like securing the fuel line inside
> the cockpit).
>
> Vinyl tubing was also included in KIS kits for use in the pitot static
> system. Some items included in the kits in fact have a shelf life, and th
at
> includes the neoprene, and vinyl tubing (tires, unused resin and
> adhesives). KIS kits are now reaching the 25 year old mark, and owners th
at
> have KIS aircraft built with these original materials need to seriously
> think about replacing or upgrading them if they have not done so already.
> The vinyl tubing in my 23 year old is still somewhat serviceable, but I a
m
> upgrading to Nyloseal tubing, and fittings - those will last a few
> lifetimes.
>
> Some builders did not follow the Builders Manual, it=99s just the n
ature of
> homebuilt airplanes. Some installed that black rubber hose from the fuel
> tanks all the way through the cockpit to the firewall (a very bad idea).
My
> TR-1 had that black hose from the tanks through the side of the fuselage,
> then slid onto the aluminum tubing (no barb) held on by 2 hose clamps,
> running 45+ psi automotive fuel pumps in each wing slosh tank. The return
> came from the firewall fitting into vinyl tubing, to the fuel valve, back
> into vinyl tubing to the tanks. That tubing is now petrified. What
=99s in
> your fuel system?
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=439763#439763
>
>
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>
>
Message 2
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| Subject: | Re: NEOPRENE HOSE |
Fuel system problems are about 25% of the mechanical failures leading to acc
idents in homebuilts. I would switch to real aircraft hoses (like aeroquip
303) and hardware for any aircraft system. It is not hard to make up the h
oses yourself if you get the mandrel tool.
Scott
Sent from my iPad
> On Mar 24, 2015, at 3:24 PM, Galin Hernandez <galinhdz@gmail.com> wrote:
>
> My TR-4 has the neoprene hose from the wing to the fuselage as per the pla
ns. One of them started leaking (old age cracking) after 9 years of use. The
hose is very inexpensive so I now have it in my "scheduled maintenance" to r
eplace the hose very 5years.
>
>> On Mon, Mar 23, 2015 at 9:13 AM, mark_trickel <marktrickel@gmail.com> wro
te:
>>
>> The 3/8 I.D. Neoprene hose included in KIS kits was intended for the fuel
line connection between the fuel tanks, and the fuselage. The manual is a l
ittle vague, but there is a drawing of a typical aircraft fuel system includ
ed in the TR-1 Builders Manual (Airframe Assembly section page 8 ). I did no
t check, but I am sure the same drawing is in the TR-4 Builders Manual. The d
rawing comes from our faster, sleeker, and much more difficult to build cous
in, the Lancair 235/320.
>>
>> The black rubber hose is a very important piece to the KIS aircraft. I ca
n think of 2 real important reasons for this hose. First it makes hooking up
the fuel tanks =93 simple. It would be a lot harder to install a meta
l piece of tubing in this tight spot. Second when a wing panel breaks off in
a crash, the neoprene fuel line would separate very easily - you won=99
t have to worry about the fuel line whiplashing about the cockpit (hopefully
you all have plenty of Adell clamps or the like securing the fuel line insi
de the cockpit).
>>
>> Vinyl tubing was also included in KIS kits for use in the pitot static sy
stem. Some items included in the kits in fact have a shelf life, and that in
cludes the neoprene, and vinyl tubing (tires, unused resin and adhesives). K
IS kits are now reaching the 25 year old mark, and owners that have KIS airc
raft built with these original materials need to seriously think about repla
cing or upgrading them if they have not done so already. The vinyl tubing in
my 23 year old is still somewhat serviceable, but I am upgrading to Nylosea
l tubing, and fittings - those will last a few lifetimes.
>>
>> Some builders did not follow the Builders Manual, it=99s just the n
ature of homebuilt airplanes. Some installed that black rubber hose from the
fuel tanks all the way through the cockpit to the firewall (a very bad idea
). My TR-1 had that black hose from the tanks through the side of the fusela
ge, then slid onto the aluminum tubing (no barb) held on by 2 hose clamps, r
unning 45+ psi automotive fuel pumps in each wing slosh tank. The return cam
e from the firewall fitting into vinyl tubing, to the fuel valve, back into v
inyl tubing to the tanks. That tubing is now petrified. What=99s in yo
ur fuel system?
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=439763#439763
>>
>>
>>
>>
>>
>>
>>
>> ==========
>> List" target="_blank">http://www.matronics.com/Navigator?KIS-List
>> ==========
>> FORUMS -
>> _blank">http://forums.matronics.com
>> ==========
>> b Site -
>> -Matt Dralle, List Admin.
>> target="_blank">http://www.matronics.com/contribution
>> ==========
>
>
>
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>
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