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fuel lines

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fraser221

Joined: 03 Feb 2008
Posts: 13

Posted: Mon Nov 02, 2015 3:09 pm Post subject: fuel lines

Planning  the fuel lines using finger strainers at the tank, via gascolator and flowscans on the send and return lines.



can anyone advise whether I should use a restrictor on the return line and suggested type of hose etc.



any advice and pics would be appreciated. Engine install is 912s.



regards



Vic



Classic mono 912s

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rampil

Joined: 04 May 2007
Posts: 870

Posted: Tue Nov 03, 2015 6:38 am Post subject: Re: fuel lines

My recollection is that for 912S installs flow restrictors are mandatory.

Read the freely available current Rotax Install Manual.

In the 912S system, the return flow rate is tiny and near the lower

limit of accurate measurement of the Floscan sensor. I did not include

a return sensor in my system.  Depending on your local regulatory

authority, you may be required to do, or not do any number of things.

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_________________
Ira N224XS

rowlandcarson(at)gmail.co
Guest

Posted: Tue Nov 03, 2015 2:55 pm Post subject: fuel lines

On 2015-11-02, at 23:09, fraser221 <vicflett(at)tiscali.co.uk> wrote:



 	  Quote: 	
		   Planning  the fuel lines using finger strainers at the tank, via gascolator and flowscans on the send and return lines.

 

 can anyone advise whether I should use a restrictor on the return line and suggested type of hose etc.

 

 any advice and pics would be appreciated. Engine install is 912s.


	


Vic - I am installing much the same arrangement in an XS, although with just 1 Floscan sender. I understand the restrictor in the return line is important for ensuring the correct fuel pressure at the carbs. I’m using rigid aluminium pipe in the aft fuselage but stainless steel braided hose in the tunnel (to resist damage by stones thrown up by the wheel) and firewall-forward. Another possibility for protecting the pipe in the tunnel is to encase the aluminium pipe in a glass-fibre covering.



You can see a drawing of my fuel system and a list of the components here:



http://www.rowlandcarson.org.uk/aviation/europa_435/fuel_system.php



Hope this helps.



in friendship



Rowland



| Rowland Carson          ... that's Rowland with a 'w' ...

| <rowlandcarson(at)gmail.com>            http://www.rowlandcarson.org.uk

| Skype, Twitter: rowland_carson      Facebook: Rowland Carson

| pictures: http://picasaweb.google.com/rowlandcarson

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davidjoyce(at)doctors.org
Guest

Posted: Tue Nov 03, 2015 3:19 pm Post subject: fuel lines

Rowland, I am not convinced of the need to protect the fuel pipes running through the wheel arch. I have done a lot of landings in some fairly rough places over the last 13 years and have never detected any damage to hoses (non metal sheathed) nor yet to any of the multiple cables running through there. The paint on the flap actuator rod has also survived well. So this is another area not to add extra weight to IMHO. 

Regards, David Joyce, GXSDJ 

   

 

On 2015-11-03 09:33, Rowland Carson wrote:  	  Quote: 	
		    	  Quote: 	
		  --> Europa-List message posted by: Rowland Carson <rowlandcarson(at)gmail.com (rowlandcarson(at)gmail.com)>



On 2015-11-02, at 23:09, fraser221 <vicflett(at)tiscali.co.uk (vicflett(at)tiscali.co.uk)> wrote:Planning the fuel lines using finger strainers at the tank, via gascolator and flowscans on the send and return lines. can anyone advise whether I should use a restrictor on the return line and suggested type of hose etc. any advice and pics would be appreciated. Engine install is 912s.Vic - I am installing much the same arrangement in an XS, although with just 1 Floscan sender. I understand the restrictor in the return line is important for ensuring the correct fuel pressure at the carbs. I'm using rigid aluminium pipe in the aft fuselage but stainless steel braided hose in the tunnel (to resist damage by stones thrown up by the wheel) and firewall-forward. Another possibility for protecting the pipe in the tunnel is to encase the aluminium pipe in a glass-fibre covering.



You can see a drawing of my fuel system and a list of the components here:



http://www.rowlandcarson.org.uk/aviation/europa_435/fuel_system.php



Hope this helps.



in friendship



Rowland



| Rowland Carson          ... that's Rowland with a 'w' ...

| <rowlandcarson(at)gmail.com (rowlandcarson(at)gmail.com)>            http://www.rowlandcarson.org.uk

| Skype, Twitter: rowland_carson      Facebook: Rowland Carson

| pictures: http://picasaweb.google.com/rowlandcarson



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