Today's Message Index:
----------------------
1. 08:45 AM - Hoses and O-rings in RV-6 with Lycoming O-320 (George Nielsen)
2. 04:36 PM - Re: Hoses and O-rings in RV-6 with Lycoming O-320 (Charlie England)
3. 07:17 PM - Re: Hoses and O-rings in RV-6 with Lycoming O-320 (FLYaDIVE)
4. 11:20 PM - Re: Hoses and O-rings in RV-6 with Lycoming O-320 (Doug Gray)
Message 1
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| Subject: | Hoses and O-rings in RV-6 with Lycoming O-320 |
My plan is to enable my RV-6 and its O-320 engine to run on Mogas,
including the variety that contains ethanol. I have taken a good look
at the fuel system and done some dismantling but I have found no
O-rings. The fuel system contains several hoses, some black, some
wrapped in dark orange. I suppose that the latter is to protect them,
is it not?
I would be grateful if anyone could tell me how many hoses an RV-6
has in its fuel system, what their dimensions are and whether the
fuel system also included O-rings or anything else that may be
susceptible to Mogas, ethanol or water. If that is the case I would
like to know how many of these are present and what their dimensions
are. Thanks.
Kind regards
George Nielsen
RV-6 PH-XGN
The Hague, the Netherlands
Message 2
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| Subject: | Re: Hoses and O-rings in RV-6 with Lycoming O-320 |
On 04/08/2012 09:48 AM, George Nielsen wrote:
>
> My plan is to enable my RV-6 and its O-320 engine to run on Mogas,
> including the variety that contains ethanol. I have taken a good look
> at the fuel system and done some dismantling but I have found no
> O-rings. The fuel system contains several hoses, some black, some
> wrapped in dark orange. I suppose that the latter is to protect them,
> is it not?
>
> I would be grateful if anyone could tell me how many hoses an RV-6 has
> in its fuel system, what their dimensions are and whether the fuel
> system also included O-rings or anything else that may be susceptible
> to Mogas, ethanol or water. If that is the case I would like to know
> how many of these are present and what their dimensions are. Thanks.
>
> Kind regards
>
> George Nielsen
> RV-6 PH-XGN
> The Hague, the Netherlands
If the fuel system is 'stock', as designed by Van's, and you have the
standard fuel pickups in the tanks (not the 'flop tubes'), then there
should be only aluminum line & aluminum fittings from the tank to the
firewall, with metal-to-metal flare fittings; no O-rings. Van's stock
fuel selector should be fine, as well. Depending on age, if you have a
gascolator, it could very well have rubber gaskets that alcohol will
attack. The flexible hoses are an unknown. If you can't determine the
actual materials in the hoses, the safe thing would be to simply replace
.them with teflon lined hose. (USA FAA recommendation is to replace any
but the new teflon type hose every 5 years, anyway, though many people
don't do that.) The mechanical fuel pump will likely need to be rebuilt
with current technology diaphragms & seals; older mechanical pumps *do
not* survive alcohol for very long. The carb or injector is likely OK,
but I'd contact the manufacturer to be sure.
Hope that helps,
Charlie
Message 3
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| Subject: | Re: Hoses and O-rings in RV-6 with Lycoming O-320 |
George:
Unless you went with some NON-Aviation hoses there is NOTHING that you have
to do.
ALL aviation hoses have to comply with the ability to handle alcohol in
100% concentrations.
When a GA aircraft receives the STC for MoGas all the testing was performed
on the engine and air frame as supplied from the factory - NO physical
changes have to take place.
Ethanol is a problem with fiberglass fuel tanks and what is known as PRC
sealants. Other than that GO FOR IT. And if you do a little online
homework you will find a procedure to "WASH" the ethanol out of MoGas.
Barry
Sun, Apr 8, 2012 at 10:48 AM, George Nielsen <genie@swissmail.org> wrote:
>
> My plan is to enable my RV-6 and its O-320 engine to run on Mogas,
> including the variety that contains ethanol. I have taken a good look at
> the fuel system and done some dismantling but I have found no O-rings. The
> fuel system contains several hoses, some black, some wrapped in dark
> orange. I suppose that the latter is to protect them, is it not?
>
> I would be grateful if anyone could tell me how many hoses an RV-6 has in
> its fuel system, what their dimensions are and whether the fuel system also
> included O-rings or anything else that may be susceptible to Mogas, ethanol
> or water. If that is the case I would like to know how many of these are
> present and what their dimensions are. Thanks.
>
> Kind regards
>
> George Nielsen
> RV-6 PH-XGN
> The Hague, the Netherlands
>
>
Message 4
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| Subject: | Re: Hoses and O-rings in RV-6 with Lycoming O-320 |
PRC manufactures amongst other things polysulphide fuel tank sealant (aka P
roseal) that is universally used in RV fuel tanks.. I thought Proseal was c
ompatible with alcohol; is that not the case? Does PRC mean something else?
Doug
Sent from my iPad
On 09/04/2012, at 12:14 PM, FLYaDIVE <flyadive@gmail.com> wrote:
> George:
>
> Unless you went with some NON-Aviation hoses there is NOTHING that you hav
e to do.
> ALL aviation hoses have to comply with the ability to handle alcohol in 10
0% concentrations.
> When a GA aircraft receives the STC for MoGas all the testing was performe
d on the engine and air frame as supplied from the factory - NO physical cha
nges have to take place.
> Ethanol is a problem with fiberglass fuel tanks and what is known as PRC s
ealants. Other than that GO FOR IT. And if you do a little online homework
you will find a procedure to "WASH" the ethanol out of MoGas.
>
> Barry
>
> Sun, Apr 8, 2012 at 10:48 AM, George Nielsen <genie@swissmail.org> wrote:
>
> My plan is to enable my RV-6 and its O-320 engine to run on Mogas, includi
ng the variety that contains ethanol. I have taken a good look at the fuel s
ystem and done some dismantling but I have found no O-rings. The fuel system
contains several hoses, some black, some wrapped in dark orange. I suppose t
hat the latter is to protect them, is it not?
>
> I would be grateful if anyone could tell me how many hoses an RV-6 has in i
ts fuel system, what their dimensions are and whether the fuel system also i
ncluded O-rings or anything else that may be susceptible to Mogas, ethanol o
r water. If that is the case I would like to know how many of these are pres
ent and what their dimensions are. Thanks.
>
> Kind regards
>
> George Nielsen
> RV-6 PH-XGN
> The Hague, the Netherlands
>
>
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