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It will decrease in pressure because of the increased head and also friction losses in the tubing (I did a semester studying fluid dynamics as a surveyor many years ago trying to get water to go up hill)

The only way to verify is to put a fuel pressure gauge right at the carburettor entry.

do you guys think technically - if the fuel pump is about 40 inches before the carburetor, the PSI output pressure will decrease slightly from 4.5 to about 4.25, for example?

---

From: [email protected] <[email protected]> on behalf of Justin Gregoris <jgregoris789@...>
Sent: April 18, 2022 8:54 PM
To: [email protected] <[email protected]>
Subject: Re: [XAIR] X Air Hawk fuel tank 'shedding' particles into fuel

?

ok perfect - so my current 3-4.5 psi set up works - great to know.

I'll just replace the current pump with the exact make and model, or if there are stock shortages near my location, ill find something with a max of 4.5psi

like this:?

---

From: [email protected] <[email protected]> on behalf of Pipistrel Moderator <pipistrel.aircraft@...>
Sent: April 18, 2022 8:51 PM
To: [email protected] <[email protected]>
Subject: Re: [XAIR] X Air Hawk fuel tank 'shedding' particles into fuel

?

Justin Gregoris wrote on 19/04/2022 10:00 am:

Hello again Gents,

I cannot find any information regarding the GPH (gallons per hour) or PSI min. & max. for our electric fuel pumps.???? this will be in the requirements from the engine manufacturer, it will stipulate a minimum and a maximum psi for the fuel supply so this is nothing to do with the aircraft but is unique to individual engines

After a frustrating 20 minutes, I was able to remove the fiberglass belly pan of the X Air H. I am glad I did this because the previous owner didnt install the bypass fuel line section with a 1-way check valve! Why do you think he did not do this? ignorance or trying to keep costs as low as possible??? He built the airplane pretty well with upgraded wiring and other parts, but maybe because he felt more connections means greater potential for leaks?????

Moreover, I notice I have a Facet Cube fuel pump - model # 40105. The specs on the Cube 40105 are: 30GPH, 3.0 min PSI and 4.5 max PSI.????? a quick Google search led me to the Jabiru manufacturers website where it states the maximum pressure should be 3 psi please this is just a Google search please look at the manufacturers manual and specifications for their product

Is this correct? I feel like I should replace the electric pump, just in case. Here is my reasoning: the previous owner didnt even install the supplied Facet fuel filter into the Facet Cube! Why did he not do this as well????? because of the well-known problems with clogging of this filter. Most people do not use this filter and instead install a proper filter upstream

After the fuel tank, I do have a Dorman 55240 glass fuel filter, which is great, but because of my paranoia with the fiberglass/resin and organic particles in my 100LL fuel that is currently in the tank, I wont be surprised if there are some fine particles trapped within my Facet Cube - engine & plane currently at 160hours.?

I cant seem to find any info regarding how much min. and max. and GPH my 22A2895 Jabiru 2200 (160hrs) calls for, in the event my Jabiru mechanical fuel pump fails.

It is pretty simple I just went to the Jabiru website and downloaded the installation? manual for the 4 cylinder and 6 cylinder engines and they are saying minimum 2 psi and maximum 5 psi. This comes directly from the manual at the link below and I would not use anything but the engine manufacturers specifications

--

With regards, Michael Coates Pipistrel Aircraft Master Distributor for USA, Australia & New Zealand AU +61 7 5522 0583 USA +1 213 984 1237 Slovenia +386 3041 6470 Email: info@... Web: Skype: xcomavionics
Pipistrel Aircraft - Dealer of the year 2012 Winner of the EAA August Raspet Award 2012 Pipistrel Aircraft - Dealer of the year 2017

-- 
With regards,    Michael Coates

AU +61 7 5522 0583
USA +1 213 984 1237


PIPISTREL AIRCRAFT DEALER OF THE YEAR 2012
Winner of the EAA August Raspet Award 2012
PIPISTREL AIRCRAFT DEALER OF THE YEAR 2017

mailto:mcoates@...

skype name:   xcomavionics

Please note: because of the volume of e-mail we are now receiving our replies are
done using voice recognition software in an effort to speed up the reply process. 
Sometimes the voice recognition program inserts silly words or doesn't actually
do what it is meant to do.  Occasionally these mistakes get through our quick
proofreading of each e-mail sent, so please accept my apologies if the odd mistake
gets through.

Legal Notice: The information contained in this email is confidential
and intended only to be read by the person(s) to whom it is addressed.
No one is authorized to copy, use, disclose, distribute or rely on this
information for any purpose whatsoever. If this communication has been
sent to you in error, please email the sender and delete the message.

"Amateurs practice till they get it right;
Professionals practice till they can’t get it wrong."

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Hello again Gents,

I cannot find any information regarding the GPH (gallons per hour) or PSI min. & max. for our electric fuel pumps.???? this will be in the requirements from the engine manufacturer, it will stipulate a minimum and a maximum psi for the fuel supply so this is nothing to do with the aircraft but is unique to individual engines

After a frustrating 20 minutes, I was able to remove the fiberglass belly pan of the X Air H. I am glad I did this because the previous owner didnt install the bypass fuel line section with a 1-way check valve! Why do you think he did not do this? ignorance or trying to keep costs as low as possible??? He built the airplane pretty well with upgraded wiring and other parts, but maybe because he felt more connections means greater potential for leaks?????

Moreover, I notice I have a Facet Cube fuel pump - model # 40105. The specs on the Cube 40105 are: 30GPH, 3.0 min PSI and 4.5 max PSI.????? a quick Google search led me to the Jabiru manufacturers website where it states the maximum pressure should be 3 psi please this is just a Google search please look at the manufacturers manual and specifications for their product

Is this correct? I feel like I should replace the electric pump, just in case. Here is my reasoning: the previous owner didnt even install the supplied Facet fuel filter into the Facet Cube! Why did he not do this as well????? because of the well-known problems with clogging of this filter. Most people do not use this filter and instead install a proper filter upstream

After the fuel tank, I do have a Dorman 55240 glass fuel filter, which is great, but because of my paranoia with the fiberglass/resin and organic particles in my 100LL fuel that is currently in the tank, I wont be surprised if there are some fine particles trapped within my Facet Cube - engine & plane currently at 160hours.?

I cant seem to find any info regarding how much min. and max. and GPH my 22A2895 Jabiru 2200 (160hrs) calls for, in the event my Jabiru mechanical fuel pump fails.

It is pretty simple I just went to the Jabiru website and downloaded the installation? manual for the 4 cylinder and 6 cylinder engines and they are saying minimum 2 psi and maximum 5 psi. This comes directly from the manual at the link below and I would not use anything but the engine manufacturers specifications

The jabiru 2200 uses a bing 54 carb. The nominal pressure for them is 1-4 psi. They need to be fed, but anything over 4 psi can cause the carb to flood.
he probably didn’t install the facet filter because they aren’t serviceable and was relying on the main filter.
The bypass isn’t always a well known thing and more of a work around to avoid failure. Theoretically the facet pump should allow flow through. Just sucks to find out that one time it won’t or that it’s causing a bit to much restriction when it’s not running.

Hello again Gents,

I cannot find any information regarding the GPH (gallons per hour) or PSI min. & max. for our electric fuel pumps.

After a frustrating 20 minutes, I was able to remove the fiberglass belly pan of the X Air H. I am glad I did this because the previous owner didnt install the bypass fuel line section with a 1-way check valve! Why do you think he did not do this? He built the airplane pretty well with upgraded wiring and other parts, but maybe because he felt more connections means greater potential for leaks?

Moreover, I notice I have a Facet Cube fuel pump - model # 40105. The specs on the Cube 40105 are: 30GPH, 3.0 min PSI and 4.5 max PSI.

Is this correct? I feel like I should replace the electric pump, just in case. Here is my reasoning: the previous owner didnt even install the supplied Facet fuel filter into the Facet Cube! Why did he not do this as well?

After the fuel tank, I do have a Dorman 55240 glass fuel filter, which is great, but because of my paranoia with the fiberglass/resin and organic particles in my 100LL fuel that is currently in the tank, I wont be surprised if there are some fine particles trapped within my Facet Cube - engine & plane currently at 160hours.?

I cant seem to find any info regarding how much min. and max. and GPH my 22A2895 Jabiru 2200 (160hrs) calls for, in the event my Jabiru mechanical fuel pump fails.

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See your PM
----- Upprunalegt skeyti -----
Frá: Justin Gregoris <jgregoris789@...>
Til: [email protected]
Sent: Sun, 17 Apr 2022 21:43:51 -0000 (GMT)
Efni: Re: [XAIR] Mechanical and electric fuel pumps on my X Air

Anyone have a diagram of what setup I should have ? I'll? dismantle the floor tomorrow and remove and replace the facet pump filter but then also try and plumb? fuel lines to bypass this pump, in the event it may fail.

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This is what it should look like (generically)

Anyone have a diagram of what setup I should have ? I'll? dismantle the floor tomorrow and remove and replace the facet pump filter but then also try and plumb? fuel lines to bypass this pump, in the event it may fail.

-- 
With regards,    Michael Coates

AU +61 7 5522 0583
USA +1 213 984 1237


PIPISTREL AIRCRAFT DEALER OF THE YEAR 2012
Winner of the EAA August Raspet Award 2012
PIPISTREL AIRCRAFT DEALER OF THE YEAR 2017

mailto:mcoates@...

skype name:   xcomavionics

Please note: because of the volume of e-mail we are now receiving our replies are
done using voice recognition software in an effort to speed up the reply process. 
Sometimes the voice recognition program inserts silly words or doesn't actually
do what it is meant to do.  Occasionally these mistakes get through our quick
proofreading of each e-mail sent, so please accept my apologies if the odd mistake
gets through.

Legal Notice: The information contained in this email is confidential
and intended only to be read by the person(s) to whom it is addressed.
No one is authorized to copy, use, disclose, distribute or rely on this
information for any purpose whatsoever. If this communication has been
sent to you in error, please email the sender and delete the message.

"Amateurs practice till they get it right;
Professionals practice till they can’t get it wrong."

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the large gold part at the bottom of this picture is the filter. If you break them open there is a wire mesh filter in their but they are not serviceable, the only way to try and service them is to flush them backwards but I have had mixed results. The fibreglass of the X-Air fuel tank will clog these in record time so you are best to discard this filter and use a serviceable filter which is clear like in the 2nd photograph.....?? you can get these in quarter-inch, 5/16 and 3/8 nipple size and it is important to get the correct one for your fuel hose because a loose one is not a good fit

Mine has a bypass made with a one-way check valve that t's around the pump. It has a small silver filter before the pump and another filer between the tank and the filter pump. I'm not aware of any internal filter and it's not been a problems as of yet for me.

Tom

-- 
With regards,    Michael Coates

AU +61 7 5522 0583
USA +1 213 984 1237


PIPISTREL AIRCRAFT DEALER OF THE YEAR 2012
Winner of the EAA August Raspet Award 2012
PIPISTREL AIRCRAFT DEALER OF THE YEAR 2017

mailto:mcoates@...

skype name:   xcomavionics

Please note: because of the volume of e-mail we are now receiving our replies are
done using voice recognition software in an effort to speed up the reply process. 
Sometimes the voice recognition program inserts silly words or doesn't actually
do what it is meant to do.  Occasionally these mistakes get through our quick
proofreading of each e-mail sent, so please accept my apologies if the odd mistake
gets through.

Legal Notice: The information contained in this email is confidential
and intended only to be read by the person(s) to whom it is addressed.
No one is authorized to copy, use, disclose, distribute or rely on this
information for any purpose whatsoever. If this communication has been
sent to you in error, please email the sender and delete the message.

"Amateurs practice till they get it right;
Professionals practice till they can’t get it wrong."

Anyone have a diagram of what setup I should have ? I'll? dismantle the floor tomorrow and remove and replace the facet pump filter but then also try and plumb? fuel lines to bypass this pump, in the event it may fail.

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Yes.?

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I'm assuming I can unscrew the fasteners from the bottom of the aircraft and drop the floor to access all of the fuel lines and pump?

---

Mine has a bypass made with a one-way check valve that t's around the pump. It has a small silver filter before the pump and another filer between the tank and the filter pump. I'm not aware of any internal filter and it's not been a problems as of yet for me.

Tom

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-- 
With regards,    Michael Coates

AU +61 7 5522 0583
USA +1 213 984 1237


PIPISTREL AIRCRAFT DEALER OF THE YEAR 2012
Winner of the EAA August Raspet Award 2012
PIPISTREL AIRCRAFT DEALER OF THE YEAR 2017

mailto:mcoates@...

skype name:   xcomavionics

Please note: because of the volume of e-mail we are now receiving our replies are
done using voice recognition software in an effort to speed up the reply process. 
Sometimes the voice recognition program inserts silly words or doesn't actually
do what it is meant to do.  Occasionally these mistakes get through our quick
proofreading of each e-mail sent, so please accept my apologies if the odd mistake
gets through.

Legal Notice: The information contained in this email is confidential
and intended only to be read by the person(s) to whom it is addressed.
No one is authorized to copy, use, disclose, distribute or rely on this
information for any purpose whatsoever. If this communication has been
sent to you in error, please email the sender and delete the message.

"Amateurs practice till they get it right;
Professionals practice till they can’t get it wrong."

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A facet pump will not have any problems running dry until it primes. The inbuilt fuel filter is a problem because it can clog and you can't see anything because it is fully closed so extra care must be taken. You need to have a one-way bypass valve fitted and if you need more information just let me know. Also note: they come in different pressure outputs so you must make sure you get the correct one, I have seen somebody install a 10 psi unit and it simply vent fuel out of the carburettor when the engine is not running because the fuel pressure is so high

Thanks?for providing a link!

So, if my fuel lines have no fuel and I turn this pump on, will damage occur before any fuel lubricates the pump, or should i turn the engine over by hand or try starting it with choke on - without using the electric fuel pump?

I'd like to prime all fuel lines without damaging anything.

---

From: [email protected] <[email protected]> on behalf of kymidnight@... <kymidnight@...>
Sent: April 15, 2022 10:40 PM
To: [email protected] <[email protected]>
Subject: Re: [XAIR] Mechanical and electric fuel pumps on my X Air

?

My electric fuel pump is on the firewall. It's an automotive type like this one.

-- 
With regards,    Michael Coates

AU +61 7 5522 0583
USA +1 213 984 1237


PIPISTREL AIRCRAFT DEALER OF THE YEAR 2012
Winner of the EAA August Raspet Award 2012
PIPISTREL AIRCRAFT DEALER OF THE YEAR 2017

mailto:mcoates@...

skype name:   xcomavionics

Please note: because of the volume of e-mail we are now receiving our replies are
done using voice recognition software in an effort to speed up the reply process. 
Sometimes the voice recognition program inserts silly words or doesn't actually
do what it is meant to do.  Occasionally these mistakes get through our quick
proofreading of each e-mail sent, so please accept my apologies if the odd mistake
gets through.

Legal Notice: The information contained in this email is confidential
and intended only to be read by the person(s) to whom it is addressed.
No one is authorized to copy, use, disclose, distribute or rely on this
information for any purpose whatsoever. If this communication has been
sent to you in error, please email the sender and delete the message.

"Amateurs practice till they get it right;
Professionals practice till they can’t get it wrong."

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Basically, the material is a lamination on top of Dacron. It came out with all the fanfare of being the new one the material but unfortunately in areas of very high UV (think Australia) the bonding material deteriorated in the plastic can get peeled off like you are shelling an egg. Underneath is normal Dacron so the plane is still very usable, the problem is if this starts to tear off during flight it can lift off in really large areas.

I would use some sort of signwriting vinyl to make a big patch to go over the top of it to try and stop it from peeling and try and preserve the covering for as long as possible before you need to replace the fabric

I have an 09 X-Air LS (USA S-LSA).? I have notice 2 spots where the clear film on the OPAC covering is peeling.? After a long search, I have not been able to locate anyone using OPAC material to make sails.? Being this is a factory built S-LSA, are there other options?? Is it possible to patch the spots to slow the spread?? Any help is appreciated.

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I have an 09 X-Air LS (USA S-LSA).? I have notice 2 spots where the clear film on the OPAC covering is peeling.? After a long search, I have not been able to locate anyone using OPAC material to make sails.? Being this is a factory built S-LSA, are there other options?? Is it possible to patch the spots to slow the spread?? Any help is appreciated.