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  #71  
Old 01-18-2018, 05:54 PM
TS Flightlines TS Flightlines is offline
 
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Location: Ridgeland, SC
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Julian----I was told the pump was clean, with no traces, so I was concentrated on the discharge hose. Did find that anomaly with the liner, that isnt present anywhere else. Did section a piece out of the -6 supply hose and the anomaly isnt there. Clean as a whistle, as you would expect a teflon hose running fuel through it would be.

Agreed---inspection is a good course of action, and even flushing the hoses. But if there wasnt any debris in the gascolator, or the supply hose, then it got there some how, and the size of the debris is much larger than would have passed through the gascolator screen.

Tom
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Tom Swearengen, TS Flightlines LLC
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com
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  #72  
Old 01-18-2018, 07:21 PM
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Phantom30 Phantom30 is offline
 
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Location: Coeur d'Alene, ID/Casa Grande, AZ
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Quote:
Originally Posted by Azjulian View Post
What I should point out is that all the debris on Rics plane was in the adapter on the outlet side of the fuel pump. I had run the fuel flow test in the Vans manual (which is at the gascoloator) and then because of the issues Ric and Mark were experiencing ran it again at points up the fuel system, seeing a noticeable degradation in fuel flow after the pump. How the debris got there and got compacted in the adapter I have no clue (when they took the pump apart it looked brand new).

So I would suggest that on condition inspect people remove the adapters and inspect.

I don't have the TS flightlines on my plane, but it looks from the instructions that the adapters are replaced by that solution.
Azjulian....the material did not come through the pump. It was moving around in the fuel line between the banjo fitting that attaches to the fuel block assy and the outlet fitting of the fuel pump. The material being debris from the Teflon hose liner left there following manufacture of the hose. And it had been previously flow tested with okay results. Did I look down the bore of the hose...no; I guess my mistake. As it was part if the equipment received from Rotax I assumed it was okay.
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RV-12 Kit#729 "N312RD" is now a full functioning fun machine!! Thanks Van for fulfilling my dream😎
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  #73  
Old 01-18-2018, 08:05 PM
RFSchaller RFSchaller is offline
 
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Location: Phoenix, AZ
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Wherever it came from itís scary. I blew out out my fuel lines with air and a flush cloth over then end when I installed them. I never got anything on the cloth. That amount of debris is just bizarre!
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  #74  
Old 01-18-2018, 08:25 PM
TS Flightlines TS Flightlines is offline
 
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Rich, it IS bizarre.

Tom
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Tom Swearengen, TS Flightlines LLC
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com
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  #75  
Old 02-17-2018, 12:45 AM
cyamaha2007 cyamaha2007 is offline
 
Join Date: Sep 2015
Location: Wright City, MO
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TS FLIGHTLINES keep up the good work! Thanks for dedicating time and money to figuring out our problem. We also have a low fuel pressure readings from time to time. I've ruled out the sending unit but that's as far as I've made it. Our problem is hit or miss as of now making it hard to duplicate.
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  #76  
Old 02-17-2018, 09:38 AM
TS Flightlines TS Flightlines is offline
 
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Chuck---thats one of the strange things about this whole deal. Some Rotax 912's have it, some dont. It doesnt seem to be geographical, altitude, RPM, fuel blend, or any other obviously related items. Some with the old rubber hoses were fine, some werent. Some with the Rotax version teflon were fine, others werent. WE did take Scott's advice and ask for testers that were having pressure issues to contact us, AND several have. Interesting results.
We are still gathering data--because all of you want to know. We're down to the last 5 testers that are helping us (Aircraft Specialty and TS FLightlines) gather this data. Weather, schedules, and gee sometimes life happens that throws a kink in plans, so its taken longer than we wanted, but its been methodical.
Oh and this isnt just US based planes, we have an Australian based 12 that is also involved, as well as a European owner.

Tom
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Tom Swearengen, TS Flightlines LLC
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com
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