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  #21  
Old 10-21-2021, 01:10 AM
Aircraft Specialty Aircraft Specialty is offline
 
Join Date: Jan 2012
Location: Oconomowoc, WI
Posts: 498
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Quote:
Originally Posted by mfleming View Post
Someone asked in a PM if this was the new or old bracket. I don't know but here's a photo of it for those that are interested
This is the new style bracket......... based on feedback, we made numerous modifications. Same basic design but a bit less bulky and easier to install than version 1 bracket.

Steve
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  #22  
Old 10-21-2021, 07:36 AM
Traash Traash is offline
 
Join Date: Apr 2007
Location: Montgomery, TX
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I used their hoses but installed the cube after the fuel servo and in a horizontal orientation on my -540.
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  #23  
Old 10-21-2021, 04:36 PM
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Mark Dickens Mark Dickens is offline
 
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Location: Collierville, TN (KFYE)
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I don't have the nice bracket, but this is the way my red cube is mounted and after 340 hours, it's done just fine. I love the fact that after I calibrated the K factor, it's now within a tenth or two of the actual fuel level every time after refueling. I can't really trust the fuel level sensors, but I can trust the calculated levels within that tenth or two. By the way, it was Tom's idea when I did it based on others who have done this.
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RV-8 #81077 Super Slow Build
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  #24  
Old 10-21-2021, 04:51 PM
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DanH DanH is online now
 
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Quote:
Originally Posted by TS Flightlines View Post
Anyone recognize this?
Tom
Yeah, that's mine Tom. Recall there is a bracket hidden behind it, bolted to the sump flange.
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  #25  
Old 10-21-2021, 06:26 PM
TS Flightlines TS Flightlines is offline
 
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Location: Ridgeland, SC
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Thanks Mark-----
340 hours of trouble free use. Ok!

Tom
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Teflon Hose Assemblies for Experimentals
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  #26  
Old 10-21-2021, 06:39 PM
TS Flightlines TS Flightlines is offline
 
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Hi Dan---yes I DO remember---and I have the install pics. My point was the wire isnt facing UP---well I guess if you make a left 90* bank it would be--
and it has a very short hose with a 90* hose end, and a 45* inlet fitting on the transducer. Kinda 'violates' the parameters that EI has, but has worked for a long time.

Guys---keep in mind that that stock installs on the RV10 and RV14 both violate EI's recommendation too---but work just fine.

Tom
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Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7A Tail Kit Completed, Fuse started-Pay as I go Plan, on hold while we develop new products for RV builders
Ridgeland, SC
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  #27  
Old 10-22-2021, 08:04 AM
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DanH DanH is online now
 
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Quote:
Originally Posted by TS Flightlines View Post
Hi Dan---yes I DO remember---and I have the install pics. My point was the wire isnt facing UP---well I guess if you make a left 90* bank it would be--
and it has a very short hose with a 90* hose end, and a 45* inlet fitting on the transducer. Kinda 'violates' the parameters that EI has, but has worked for a long time.
Confirmed, seems to be quite accurate at all flows.

Quote:
Guys---keep in mind that that stock installs on the RV10 and RV14 both violate EI's recommendation too---but work just fine.
The reason is obvious when you take a red cube apart.

Fuel spins a turbine with flow at a tangent to its circumference. That means the inlet and outlet are offset to one side of the turbine chamber. With the wire up, the ports are at the top. With the wire on the side, the port flow is vertical. Neither position can trap any significant amount of vapor. However, I'll venture a cube installed upside down, wire on the bottom, will lose accuracy because it will trap vapor in the top of the chamber, and the paddle wheel won't spin consistently.

Simple bracket behind cube. It's not just hanging in the hose, although a lot of them seem to be fine that way.
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  #28  
Old 10-22-2021, 09:28 AM
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rv8ch rv8ch is offline
 
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Quote:
Originally Posted by DanH View Post
...
Simple bracket behind cube. It's not just hanging in the hose, although a lot of them seem to be fine that way.
Here's how I installed my "red cube." It is in about the same place recommended on the RV-14 plans, although I did bolt mine to the engine. I've read that this might not be the best idea due to the transmission of vibrations from the engine to the fuel flow mechanism.

So far it's reading accurately at about 100 hours of flight time.

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... and a few more pictures:

http://www.rv8.ch/red-cube-fuel-flow...-installation/
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  #29  
Old 10-22-2021, 01:28 PM
TS Flightlines TS Flightlines is offline
 
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LOL---Hey Mickey----another 'not to instructions' install that is working just fine. Last I heard, this was experimental aviation, so playing out of the box--within reason and good testing--is pretty normal.

Nice Job.
Tom
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Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7A Tail Kit Completed, Fuse started-Pay as I go Plan, on hold while we develop new products for RV builders
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
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  #30  
Old 10-23-2021, 06:11 AM
Tooch Tooch is offline
 
Join Date: Nov 2011
Location: Amelia, Va
Posts: 314
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Just like was mentioned, the cube in my RV-10 is installed before the mechanical fuel pump. Not recommended. Only downside I and others have seen is an exaggerated flow reading when the boost pump is on. Not a big deal.
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