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  #41  
Old 06-26-2018, 09:33 AM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,801
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Originally Posted by lr172 View Post
Scott,

I plan to follow this approach on my 10. Can you elaborate on how similar or dissimilar the 10 wing is from the 12 wing? Would you expect the 20* orientation to also work well on the 10 wing. I realize that no testing has been done for the 10 and i am in experimentation territory.
It should be pretty close for the 10 as well but I have never analyzed it because we have pitot mounted ports on both of our RV-10's.

It would be better to be slightly aft of nominal than fwd of nominal. If the port gets near the flow stagnation point as the wing approaches stall AOA, the reading on the indicator can begin reverse and show that AOA is decreasing. I have this issue with my RV-6A because I had to guess at position. I will be adding another port in the future.
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Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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  #42  
Old 06-26-2018, 10:56 AM
redbaron redbaron is offline
 
Join Date: Aug 2013
Location: Lucerne,Ca
Posts: 234
Default AOA

Even with the wings finished it an easy install
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  #43  
Old 06-26-2018, 12:23 PM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
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Even with the wings finished it an easy install
Agreed and this is why i am open the to trying. It will be easy to move the rivet to a new position and plug the old hole.
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RV-6A / IO-320, Flying as of 8/2015
RV-10 in progress
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  #44  
Old 06-26-2018, 12:24 PM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
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Originally Posted by rvbuilder2002 View Post
It should be pretty close for the 10 as well but I have never analyzed it because we have pitot mounted ports on both of our RV-10's.

It would be better to be slightly aft of nominal than fwd of nominal. If the port gets near the flow stagnation point as the wing approaches stall AOA, the reading on the indicator can begin reverse and show that AOA is decreasing. I have this issue with my RV-6A because I had to guess at position. I will be adding another port in the future.
Thanks for the insight Scott! Do you know what angle the 10 wing stalls at? If it is greater than 20* from the relative wind, it is hard to see how the 20* location eould work. Though i suupose the large decent angle near stall speed will keep the relative wind at a good angle down from the chord line.
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RV-10 in progress

Last edited by lr172 : 06-26-2018 at 12:29 PM.
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  #45  
Old 06-26-2018, 02:31 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,801
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Originally Posted by lr172 View Post
Thanks for the insight Scott! Do you know what angle the 10 wing stalls at? If it is greater than 20* from the relative wind, it is hard to see how the 20* location eould work. Though i suupose the large decent angle near stall speed will keep the relative wind at a good angle down from the chord line.
Most airfoils stall at something close to 17* AOA, but I can't tell you for sure what what the correct zero angle reference is on the RV-10 because of the influence of the reflex.
If Steve (designer see's this thread, possibly he would be willing to comment)

Sorry for the thread drift, if a moderator wanted to break this off into a new thread in the RV-10 forum, that would probably be a good thing.
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