View Single Post
Old Mar 13, 2012, 02:47 PM
dave1993 is offline
Find More Posts by dave1993
RC beginner
New York
Joined Oct 2008
6,054 Posts
Quote:
Originally Posted by teflyer View Post
The reason it is so small is that I need the proper Reynolds number to test the airfoils. I should have said 7"x7"x36".
i dont see how tunnel size relates to re at all. seems wing size would be more relevant there. imo the bigger the tunnel the better. you gotta stay away from those walls. really big might be a storage problem though unless its collapsible like the one my buddy built.

if i were you id take avantage of the fan size and make it that big. also note that 2 fans are better than 1 in terms of homogeneous flow. probably 4 would be even better however...

Quote:
Originally Posted by teflyer View Post
Can you give me a link on what you did for the lift calculations?
no cackle-ay-shuns at all for this test. i eyeballed scale readouts and attempting to make sense of the wildly jumping digits. tried to freeze them with photos but that didnt work too well due to lighting problems. intent was to compare two airfoils and that went pretty well in spite of the problems.
dave1993 is offline Find More Posts by dave1993
Reply With Quote