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  #41  
Old 03-19-2015, 01:41 PM
Mich48041 Mich48041 is offline
 
Join Date: Apr 2008
Location: Riley TWP MI
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The air exits around the bottom of the regulator fins.
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RV-12 Flying
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  #42  
Old 03-19-2015, 01:46 PM
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f1rocket f1rocket is offline
 
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Quote:
Originally Posted by MacPara View Post
I have received my Silent-Hektik regulator/rectifier from Germany and plan on installing it over the weekend while also changing the air pickup to the radiator duct.
Any chance you could get me one as well?
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Randy Pflanzer
Greenwood, IN

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Paid through 2043!
Lund fishing Boat, 2017, GONE FISHING
RV-12 - Completed 2014, Sold
427 Shelby Cobra - Completed 2012, Sold
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  #43  
Old 03-19-2015, 01:58 PM
rgmwa rgmwa is offline
 
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Location: Perth, Western Australia
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Thanks Joe. I was relying on memory (always risky at this age), so I'll have a closer look when I get back to the hangar. Who knows, there may still be room for improvement.
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RV-12LR 912ULS
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  #44  
Old 03-19-2015, 09:22 PM
cactusman cactusman is offline
 
Join Date: Oct 2012
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Quote:
Originally Posted by f1rocket View Post
Any chance you could get me one as well?
uh- oh....I'm taking that as a sign that you are not happy with your John Deere reg setup?
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  #45  
Old 03-19-2015, 11:18 PM
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f1rocket f1rocket is offline
 
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No, not at all. I just completed a 12 hour cross country and it's working flawlessly. I like the higher amperage rating, metal bottom, and general robustness of the German model.
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Randy Pflanzer
Greenwood, IN

www.pflanzer-aviation.com
Paid through 2043!
Lund fishing Boat, 2017, GONE FISHING
RV-12 - Completed 2014, Sold
427 Shelby Cobra - Completed 2012, Sold
F1 EVO - partially completed, Sold
F1 Rocket - Completed 2005, Sold
RV-7A - Partially completed, Sold
RV-6 - Completed 2000, Sold
Long-EZ - Completed 1987, Sold

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  #46  
Old 03-23-2015, 10:12 AM
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MacPara MacPara is offline
 
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Location: Tucson, AZ
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Here is the report of my Silent-Hektik installation.

All went well and it works great. Charges at 2+ Amps after startup at 1900RPM with all electrics working (landing light off).



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RV-12: #120374, ELSA, N128TL flying since Nov 28, 2013 (Phase 1 completed 1/26/14)
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  #47  
Old 03-23-2015, 02:51 PM
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MacPara MacPara is offline
 
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The flanges are available at Aircraft Spruce.
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http://torstensrv-12.blogspot.com/
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  #48  
Old 03-26-2015, 04:46 PM
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Bill_H Bill_H is offline
 
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Location: Marshall TX (KASL)
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Default Bender Baffle AND New Blast Tube Scoop

Here is the modification I am thinking of doing. I want to have both the Bender Baffle and to
relocate my existing blast tube to be sourced from the duct. I intend to incorporate a scoop
as shown and not increase the diameter of the blast tube.

I intend to try to get some idea of airflow in the duct on the ground at idle. It makes sense that
it would be much more than through the cowl holes behind the root of the prop blade. I am
going to tape a wooden dowel vertically in the center of the duct, just to the right of the
fishmouth opening. I will have yarn tufts on it. Then with engine idling, have a helper
(carefully - zoomed) take video of what the tufts are doing. If there is a decent amount of
flow, it would seem that this arrangement would provide a lot more ground airflow to the
regulator than that tangential opening on the side of the cylinder shroud.

Comments on the plan are welcome!
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Last edited by Bill_H : 03-27-2015 at 06:26 PM.
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  #49  
Old 03-27-2015, 01:27 PM
funflying funflying is online now
 
Join Date: Oct 2006
Location: arvada, co
Posts: 445
Default NACA scoop?

I am with you Bill on a possible scoop design. As I have watched things come around and discussions about getting air to the VR for cooling I envisioned a small NACA scoop taking air from the current cooling tunnel or another location on the cowl. Even the cylinder cooling shroud location with a different way to accept the air coming in might do better than the current tube through a hole. However, my tube in the shroud is cut at an angle so it forms a type of scoop, but it could be much better. And I really don't know the air flow to the VR currently, but I don't think it's any better than the other.

I am encouraged with the other VRs used and some of the cooling techniques being tried. I am not interested in putting the VR inside the cockpit. A local friend who has a Kitfox and has flown behind the 912 for many years has his VR inside, and over the years has gone through 5 of the things. He said this most recent one has lasted the longest so he's hopeful design changes within Ducati have improved. He too is looking into the German one mentioned in this thread.

I will keep watching and reviewing results. Thanks all!!
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  #50  
Old 03-27-2015, 04:40 PM
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WingedFrog WingedFrog is offline
 
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Location: Raleigh, NC
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Bill and Torsten, I would recommend that you measure the dynamic pressure you get in your blast tube at idle RPMs. The tool needed is easy to fabricate: a pressure gauge made of 1/4" plastic tube filled with water and shaped as a U. You just need to make a slit in your blast tube to slide your fabricated pitot (just the extension of the pressure gauge tube attached to a thick wire and shaped as a L) in it. Once done you can easily patch the tube. The type of the original tube in addition to being too narrow was also not good for a laminar flow with its kind of corrugated surface. This was not a problem in flight when there is plenty of RAM air but it was during ground operations which is why it is important to find out what kind of airflow you get at idle RPMs.
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