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-   -   New Rotax SB - We all replace fuel pumps? (https://vansairforce.net/community/showthread.php?t=101345)

E. D. Eliot 07-02-2013 02:45 PM

Complete 'retro' kit?
 
I'm about 5 years from needing your kit because I'm broke but will you be offering a complete RV-12/Rotax retro kit some time in the future. Sounds like a really good idea to me - and economical too in the long run. Thanks for alerting us to this up grade.

Aircraft Specialty 07-02-2013 04:15 PM

Yes....

We are currently just starting an RV-12 build. We will be offering a complete retro kit.

But, for those who want them now, we can build the hoses to custom measurements.

Have a great day,
Steve

Jetguy 07-02-2013 07:32 PM

Those hoses are cool!
 
I have a few questions for Tom about the hoses for the Rotax.
On the last pic with the fuel block removed is there a restriction in the fuel return line?
What would the total cost be for that mod in that same pic(compete Rotax retrofit)?
Will you have a booth at OSH with a few of these Rotax hoses there?:confused:

Dvalcik 07-02-2013 07:43 PM

same ?s
 
John you beat me to the same questions :D

Plus can we order at Oshkosh?

TS Flightlines 07-02-2013 08:13 PM

John and David,
Right now I probably will not be at OSH. But--if you'll email me, I'll tell you anything you want! The pic that Steve posted here is of a RV12, with a slightly modified fuel pump to accomadate the AN hose ends. The original Rotax hoses are rubber, with either low pressure crimp bands. Some applications of the same engine are using hose clamps. Mine are my standard stainless teflon hose, with stainless hose ends. An AN tee, and an AN cross are used in these assemblies.
I basically copied the original hoses, so everything fits.
My email is tsflightlines@gmail.com

Tom

TS Flightlines 07-02-2013 08:38 PM

OH yeah---that hose package is on John Jones' beautiful RV12 in Fort Worth. John was nice enough to email me the installed pics. I'm pretty sure if some of you are in the Ft Worth area, he would not mind at all if you looked at his installation.
Tom

dick seiders 07-03-2013 08:55 AM

Scott, don't know the answer to your question on the Facet fuel pump. Couldn't find anything in forum search either. However the elec. pp. puts out about 1.2lbs pressure and I suspect that would be sufficient to help with a more controlled off field/on field landing as the engine would be developing power and landings are usually accomplished with a closed throttle (given sufficient altitude and suitability of landing area). 3.8lbs is normal with a working mechanical fuel pump, but 1.2 may be sufficient to fly above stall speed until a suitable landing area is found. It would certainly be the first thing to try. It's a good question. Hopefully someone out there has a more definitive answer.
Dick Seiders 120093

NASA515 07-03-2013 05:50 PM

I don't understand - the POH Checklist calls for Fuel Pressure before Start as 'Normal", which is - I believe 2.2 psi. My boost pump puts out about 2.7 psi before I turn the Start key (I have a separate Fuel Pump Switch - but pulling the pump fuse accomplishes the same sort of check.)

After engine start, the fuel pressure is more like in the 5.7 - 5.9 psi range.

Bob Bogash
N737G

Jetguy 07-03-2013 06:19 PM

Quote:

I don't understand - the POH Checklist calls for Fuel Pressure before Start as 'Normal", which is - I believe 2.2 psi. My boost pump puts out about 2.7 psi before I turn the Start key (I have a separate Fuel Pump Switch - but pulling the pump fuse accomplishes the same sort of check.)

After engine start, the fuel pressure is more like in the 5.7 - 5.9 psi range.

Bob Bogash
N737G
IMHO "Normal" means anything more than zero. At this point you are just verifying that the electric fuel pump is working by it showing "some pressure". Then after start the engine driven fuel pump starts working and then the fuel pressure comes up in the green or normal range on the Skyview.;)

NASA515 07-03-2013 08:15 PM

OK - the question is -- will the 2.7 psi from the elec boost pump run the engine normally with an INOP engine driven pump???

Bob Bogash
N737G


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