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Search: Posts Made By: Ollie
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Forum: Aerodynamics
03-24-2002, 05:09 PM
Replies: 12
Views: 20,660
Posted By Ollie

Airfoil for Pup

The AG17 airfoil is thin and undercambered like the airfoil of the full scale Sopwith Pup. The AG17 has a very low drag coefficient which is minimum (Cd<0.007) at a lift coefficient of 0.12. This...
Forum: Aerodynamics
03-20-2002, 04:53 PM
Replies: 12
Views: 20,660
Posted By Ollie

Sopwith Pup

I went to the Balsa USA web site and found that the 1/3 scale Pup is a Sopwith Pup not a Buhl Pup. The description of the model strongly implies that the airfoil is scale or scale-like.

I checked...
Forum: Aerodynamics
03-20-2002, 03:45 AM
Replies: 12
Views: 20,660
Posted By Ollie

undercambered vs flat bottomed wing

Skip,
Since you put it that way, I don't know.
Forum: Aerodynamics
03-20-2002, 02:15 AM
Replies: 12
Views: 20,660
Posted By Ollie

Undercamber Conversion

Skip,
Yes, you can convert an under cambered airfoil to a flat bottomed airfoil and it will probably extend the speed range to a higher range. However, in thickening the airfoil you probably also...
Forum: Aerodynamics
03-18-2002, 04:48 PM
Replies: 12
Views: 20,660
Posted By Ollie

Airfoil Qualities

Don,
The truth, or as close to it as we can get, is in Soartech #8, Summary of Low-Speed Airfoil Data, X-Foil, etc. as you well point out. The truth is in the numbers! Trying to deal with the truth...
Forum: Aerodynamics
03-18-2002, 10:49 AM
Replies: 12
Views: 20,660
Posted By Ollie

undercambered vs flat bottomed wing

Yesterday we were flying in 15 MPH winds. I was flying with a wing of 8% thickness and 3% mean camber (undercamber). Some of my flying buddies were flying planes with flat bottomed airfoils of 12%...
Forum: Aerodynamics
03-18-2002, 01:29 AM
Replies: 12
Views: 20,660
Posted By Ollie

Airfoil Comparison

The most meaningful way to characterize an airfoil is by its mean camber line and maximum thickness, not by flat bottomed or undercambered. Draw the chord line from the nose of the leading edge to...
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