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Battery independent power supply for Rotax 914 fuel pumps

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Roland

Joined: 30 Nov 2009
Posts: 334
Location: EDLE

Posted: Thu Jul 12, 2018 11:55 pm Post subject: Battery independent power supply for Rotax 914 fuel pumps

There's a new product from Silent Hektik for a battery independent supply of electric power for the fuel pumps https://www.silent-hektik.de/UL_914_Pumpe.htm of the Rotax 914.



I'm planning to install that (weights only 200 grammes) to overcome the problem, that you lose the engine in the event of a battery or regulator failure. Also I have a LiFePo battery installed, which is great for cranking the starter but I'm not so sure, how long the electric fuel pump will run with it.



It's just a very clever backup I think.   



Regards

Roland

PH-ZTI

XS TG 914

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wdaniell.longport(at)gmai
Guest

Posted: Mon Jul 16, 2018 1:48 pm Post subject: Battery independent power supply for Rotax 914 fuel pumps

You could try the rotax 912 turbo solution.  This uses a standard 912 mechanical pump in addition to the two electric pumps.  All feed the fuel regulator and the excess returns to the tank.

You only need one electric pump operating by the way otherwise the regulator cant cope.  The new style mechanical fuel pump on its own will maintain 27"-28" and therefore keep you flying.  Indeed some people here shut down the electric pumps in cruise claiming that it saves fuel.

The fuel feed goes from the fuel tap to the gascolator and then splits into the feeder to the electric pumps and the feeder to the mech pump.  the output from all pumps meets at the regulator

Will



William Daniell



LONGPORT

+57 310 295 0744



 

On Sat, Jul 14, 2018 at 11:02 AM, Robert Borger <rlborger(at)mac.com (rlborger(at)mac.com)> wrote:

 	  Quote: 	
		  --> Europa-List message posted by: Robert Borger <rlborger(at)mac.com (rlborger(at)mac.com)>

 

 Roland,

 

 I will be very interested in your efforts to provide a backup power supply for the electric pump(s).  The product looks quite interesting.  Please keep us posed as to how it works and how well it works.

 

 Blue skies & tailwinds,

 Bob Borger

 Europa XS Tri, Rotax 914, Airmaster C/S Prop (130 hrs).

 Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP, Hercules Prop.

 3705 Lynchburg Dr.

 Corinth, TX  76208-5331

 Cel: 817-992-1117

 rlborger(at)mac.com (rlborger(at)mac.com)

 

 On Jul 13, 2018, at 2:55 AM, Roland <schmidtroland(at)web.de (schmidtroland(at)web.de)> wrote:

 

 --> Europa-List message posted by: "Roland" <schmidtroland(at)web.de (schmidtroland(at)web.de)>

 

 There's a new product from Silent Hektik for a battery independent supply of electric power for the fuel pumps https://www.silent-hektik.de/UL_914_Pumpe.htm of the Rotax 914.

 

 I'm planning to install that (weights only 200 grammes) to overcome the problem, that you lose the engine in the event of a battery or regulator failure. Also I have a LiFePo battery installed, which is great for cranking the starter but I'm not so sure, how long the electric fuel pump will run with it.

 

 It's just a very clever backup I think.   

 

 Regards

 Roland

 PH-ZTI

 XS TG 914

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Roland

Joined: 30 Nov 2009
Posts: 334
Location: EDLE

Posted: Tue Jul 17, 2018 12:35 am Post subject: Re: Battery independent power supply for Rotax 914 fuel pump

Hi Will,



yours is an interesting solution for sure, but I think, that the Silent Hektik product is an inexpensive, light and easy way if you have a standard Rotax 914 already.



Regards

Roland

PH-ZTI

XS TG 914

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