As most of us know, the canopy mounted NACA vents on the RV 4 are in a bad location. Most new builders are not putting them there. Those of us who have purchased an RV 4 with these already installed will not be building a new canopy just to relocate or eliminate these vents. If you are like me, you do not like having a somewhat non-functional thing attached to your plane, so my thought was "let's do something with it". I have read the posts about installing the vortex generators that Vans recommends, but it seems like most people agree that it is not that effective as it creates a low pressure in an area that already suffers from low pressure.
Please forgive me if this has been done before and mentioned, but I have not seen it on the forum yet. This is not the most elegant solution, and some will say that it will create drag. My plane did not lose 1 mph with this mod. It's basically a clear plastic scoop that is designed to interface with the NACA design. It works perfectly and makes the vents completely usable. I actually find myself modulating the vents now to adjust airflow as I cool down as apposed to just flying with them wide open all the time and getting no flow or reverse flow. I have attempted to post a picture. See below:
Pic: https://onedrive.live.com/?authkey=...E0C9!35127&parId=F05C6C7540F7E0C9!668&o=OneUp
Cheers,
Greg
RV4
O-320E2D
Please forgive me if this has been done before and mentioned, but I have not seen it on the forum yet. This is not the most elegant solution, and some will say that it will create drag. My plane did not lose 1 mph with this mod. It's basically a clear plastic scoop that is designed to interface with the NACA design. It works perfectly and makes the vents completely usable. I actually find myself modulating the vents now to adjust airflow as I cool down as apposed to just flying with them wide open all the time and getting no flow or reverse flow. I have attempted to post a picture. See below:
Pic: https://onedrive.live.com/?authkey=...E0C9!35127&parId=F05C6C7540F7E0C9!668&o=OneUp
Cheers,
Greg
RV4
O-320E2D
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