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@mac.com> wrote:
>
> 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@mac.com
>
> On Jul 13, 2018, at 2:55 AM, Roland <schmidtroland@web.de> wrote:
>
>
> 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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