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  #51  
Old 10-16-2017, 05:34 AM
Aircraft Specialty Aircraft Specialty is offline
 
Join Date: Jan 2012
Location: Oconomowoc, WI
Posts: 296
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Quote:
Originally Posted by JPalese View Post
Hi Steve:

As the operator of an S-LSA RV-12 used in a flight school in SE Wisconsin I would dearly love to have lifetime fuel hoses and an oil thermostat - our winters are long and cold.

Since you and I are in the same locale Steve I wonder if Van's would allow you to install those items on our aircraft, periodically inspect them and send the data you collect to the factory so blanket S-LSA approval can be given?

Just a thought. I think I'll call Gus this coming week and ask him about this idea.
John,

If Van's is onboard with your request, we would be more than happy to work with you on this project.

Steve
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  #52  
Old 10-30-2017, 06:30 PM
Aircraft Specialty Aircraft Specialty is offline
 
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Sold- NO LONGER AVAILABLE

I have a customer who purchased the RV-12 Conductive Teflon Fuel Retrofit kit He never installed it as he purchased an RV-9 and sold the RV-12 about 2 weeks ago.

Since it is unused, but still "technically" 3 and a half months old, I won't sell it as new.

It still comes with a 10 year warranty from the date of purchase for whomever would like it.

$450 including shipping ($164.95 discount off list.)

First person to email me at aircraftspecialty@gmail.com gets it!

Thx and have fun building!

Steve

Sold- NO LONGER AVAILABLE......
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Last edited by Aircraft Specialty : 10-30-2017 at 06:43 PM. Reason: Sold- No Longer Available
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  #53  
Old 01-12-2018, 01:46 PM
Aircraft Specialty Aircraft Specialty is offline
 
Join Date: Jan 2012
Location: Oconomowoc, WI
Posts: 296
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Quote:
Originally Posted by rvbuilder2002 View Post
To add some clarity....

There are now 563 (that are known about) RV-12's competed and flown.

I realize there are some that have had low fuel pressure indications but it appears to still be a small percentage of the total fleet.

I don't have an answer for those that are having low pressure indications but work is still being done to try and find an answer.

Tom has previously promoted that none of the RV-12's that have incorporated his aftermarket hose kit have had low fuel pressure indications. Perhaps if someone that does have low pressure indications was interested in changing out their hoses, we could find out if his hose set does make a difference and possibly have some additional info that could be used to solve it.
Scott,

At the time you suggested this, plans were already in the works to seek out volunteers to do a fuel system comparison.

We are going to be sending an email over to Rian this afternoon detailing some of the discoveries that we made, and then will be releasing the data on VAF after that.

Steve and Tom

Aircraft Specialty/TS Flightlines
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  #54  
Old 01-12-2018, 03:02 PM
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Phantom30 Phantom30 is offline
 
Join Date: Jul 2009
Location: Coeur d'Alene, ID/Casa Grande, AZ
Posts: 625
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Quote:
Originally Posted by Aircraft Specialty View Post
Scott,

At the time you suggested this, plans were already in the works to seek out volunteers to do a fuel system comparison.

We are going to be sending an email over to Rian this afternoon detailing some of the discoveries that we made, and then will be releasing the data on VAF after that.

Steve and Tom

Aircraft Specialty/TS Flightlines
I can tell you that my fuel pressure has been giving me fits from going to 2.0 upon decent....and until recently, lower than 2.0 @ wot during climb out and cruise. Steve sent me their kit; and the fuel pressure has been rock solid...never less than 4.4, normally 5.4. I’m a very happy camper.

Edit: I should mention that a ball of what looked like shaving of the internal lining of the fuel hose from the mechanical fuel pump to the fuel distribution block assembly was found (my uneducated assumption is this came from the assembly of the fuel hose because there is no way the **** would have made it through the gasolator or filter on the front side of the mechanical pump)....Steve, any word on your thought of the material composition. I’d like to render a report to Van’s & Rotax.
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307 (CAB) Phantom
Search and Destroy (Can
Tho RVN)
Distinguished Flying Cross Society Member
CH-47 & UH-1H "Driver"
Rotax 9 Series Service IRMT

RV-12 Kit#729 "N312RD" is now a full functioning fun machine!! Thanks Van for fulfilling my dream😎
2018 Dues Paid

Last edited by Phantom30 : 01-12-2018 at 03:12 PM.
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  #55  
Old 01-12-2018, 04:03 PM
Aircraft Specialty Aircraft Specialty is offline
 
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Location: Oconomowoc, WI
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Quote:
Originally Posted by Phantom30 View Post
I can tell you that my fuel pressure has been giving me fits from going to 2.0 upon decent....and until recently, lower than 2.0 @ wot during climb out and cruise. Steve sent me their kit; and the fuel pressure has been rock solid...never less than 4.4, normally 5.4. I’m a very happy camper.

Edit: I should mention that a ball of what looked like shaving of the internal lining of the fuel hose from the mechanical fuel pump to the fuel distribution block assembly was found (my uneducated assumption is this came from the assembly of the fuel hose because there is no way the **** would have made it through the gasolator or filter on the front side of the mechanical pump)....Steve, any word on your thought of the material composition. I’d like to render a report to Van’s & Rotax.
Ric,

Glad you are happy with your fuel hose package.

I took a picture of the debris that you sent to us from inside the fuel system. It is enroute to Tom at the moment. He is going to take a good look at it as well as do a full hose dissection to see what he can find.



Here is the original picture showing the debris clustered together.



We will definitely keep you updated on what we uncover.

Have a great weekend,
Steve
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Last edited by Aircraft Specialty : 01-12-2018 at 09:35 PM. Reason: Posted Additional Picture for Phantom 30
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  #56  
Old 01-12-2018, 04:12 PM
Aircraft Specialty Aircraft Specialty is offline
 
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Location: Oconomowoc, WI
Posts: 296
Default Some more information after several months of testing

Over the past 2-3 months, Tom and I worked with three RV-12 owners who had been experiencing intermittently low fuel pressures. We replaced those fuel systems with our Conductive Teflon retrofit kit.

Below is a link to a pdf document detailing our findings.

http://aircraftspecialty.com/PDF Doc...l Pressure.pdf

We sent this information over to Vans earlier in the day.

As always, we want to thank everyone who helped us out with this project. We wouldn't be able to do nearly as much testing without the incredible support of the Vans community.

Have a great weekend.

Steve and Tom
Aircraft Specialty/TS Flightlines
__________________
www.aircraftspecialty.com


Please email us at aircraftspecialty@gmail.com with any questions.

Your Source for Custom CNC parts, CNC cut instrument panels and labeling, Teflon fuel/oil hoses, Headsets, and many other items for Experimental Aircraft.
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  #57  
Old 01-12-2018, 05:47 PM
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Phantom30 Phantom30 is offline
 
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Posts: 625
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Quote:
Originally Posted by Aircraft Specialty View Post
Ric,

Glad you are happy with your fuel hose package.

I took a picture of the debris that you sent to us from inside the fuel system. It is enroute to Tom at the moment. He is going to take a good look at it as well as do a full hose dissection to see what he can find.



We will definitely keep you updated on what we uncover.

Have a great weekend,
Steve
Steve,
Post the original picture if you would that I sent you. The pic above has the crud scattered out.
__________________
Ric Dickison
307 (CAB) Phantom
Search and Destroy (Can
Tho RVN)
Distinguished Flying Cross Society Member
CH-47 & UH-1H "Driver"
Rotax 9 Series Service IRMT

RV-12 Kit#729 "N312RD" is now a full functioning fun machine!! Thanks Van for fulfilling my dream😎
2018 Dues Paid
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  #58  
Old 01-12-2018, 06:23 PM
alexe alexe is offline
 
Join Date: May 2013
Location: Temecula, CA
Posts: 236
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I was one of the recent beta testers for the Aircraft Specialty fuel hose kit. Prior to the installation of the new hoses and hardware, I had been having issues with sporadic low fuel pressure indications since I have been flying the aircraft. I have a relatively recent -12 kit, so the stock fuel hoses were the newer Teflon variety. Unlike the poster above, despite repeated inspections, I never found a reason for the pressure fluctuations. It has now been a bit over two months and 21 hours since I replaced the hoses and fittings with the Aircraft Specialty kit. I have had no further fuel pressure indication problems. I would feel better if I really understood why the change resolved problem. Perhaps the dissection of the old hoses will give us a clue.
Alex
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RV-12 #120758, N912AE
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Paid through December, 2018
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  #59  
Old 01-12-2018, 07:44 PM
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KALEWIS KALEWIS is offline
 
Join Date: Nov 2009
Location: Jackson, OH
Posts: 466
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Quote:
Originally Posted by Aircraft Specialty View Post
Over the past 2-3 months, Tom and I worked with three RV-12 owners who had been experiencing intermittently low fuel pressures. We replaced those fuel systems with our Conductive Teflon retrofit kit.

Below is a link to a pdf document detailing our findings.

http://aircraftspecialty.com/PDF Doc...l Pressure.pdf

We sent this information over to Vans earlier in the day.

As always, we want to thank everyone who helped us out with this project. We wouldn't be able to do nearly as much testing without the incredible support of the Vans community.

Have a great weekend.

Steve and Tom
Aircraft Specialty/TS Flightlines
We also tested the Aircraft Specialty Hoses, upgrading from the original Van's supplied hoses. We were at our 5 year replacement for rubber anyway. Over the last 5 years, we also noticed sporadic unexplained drops in fuel pressure. Over the last year, the fuel psi drops became more frequent, and usually in cruise flight. Fuel levels varied, as did altitude. PSI would drop to 2.5 and below. I want say that the engine never stumbled, ran rough, or acted funny in any way. This purely seemed to be some sort of indication issue. The fuel pressure sensor was also the original VDO (larger gray) style sender.

Testing the hoses, I have put 10+ hours on them and the fuel psi stays in the normal operating range for all phases of flight. Usually 5.0-5.5 in cruise now. We also left the original VDO fuel pressure sensor in place as well. Only changed the hoses. The old hoses are enroute back to steve for a look.

Also, we have kept up with the recommended 200 hour carb overhauls, and have never had any noticeable fuel overflow in the drip trays or debris in the carb bowls (to my knowledge this far).

Thanks to Steve for allowing us to help him out, and find some answers going forward.
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  #60  
Old 01-12-2018, 09:28 PM
Aircraft Specialty Aircraft Specialty is offline
 
Join Date: Jan 2012
Location: Oconomowoc, WI
Posts: 296
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Quote:
Originally Posted by alexe View Post
I was one of the recent beta testers for the Aircraft Specialty fuel hose kit. Prior to the installation of the new hoses and hardware, I had been having issues with sporadic low fuel pressure indications since I have been flying the aircraft. I have a relatively recent -12 kit, so the stock fuel hoses were the newer Teflon variety. Unlike the poster above, despite repeated inspections, I never found a reason for the pressure fluctuations. It has now been a bit over two months and 21 hours since I replaced the hoses and fittings with the Aircraft Specialty kit. I have had no further fuel pressure indication problems. I would feel better if I really understood why the change resolved problem. Perhaps the dissection of the old hoses will give us a clue.
Alex
Alex,

At this point in time, all we can say is that an analysis of the stock Vans/Rotax fuel system has revealed several differences in both fuel and return line fuel distribution from the Aircraft Specialty/TS Flightlines retrofit.

The documented case of debris in the fuel lines does NOT appear to be an issue with your lines.

What we do know is that our fuel system has not had any documented fuel pressure issues in the RV-12 or the multitude of other aircraft types that we build this configuration for.

Steve
__________________
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Please email us at aircraftspecialty@gmail.com with any questions.

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