It's a valid test. But "better" testing would be a few vacuum (they also read a little bit of pressure) set up at strategic locations around the test section.
While the holes might have more drag.. I bet the flat board causes a bigger "high pressure" zone. On Wed, Dec 31, 2014 at 12:33 AM, Adam Tippin via KRnet < krnet at list.krnet.org> wrote: > the only thing i could see as a variable, would be the wind traveling Up > the windshield and possible skipping over some of the board. > if the board is too short, you won?t have any results. Too tall may rip it > off the roof. > I can?t wait to hear the results. > > > On Dec 31, 2014, at 1:29 AM, Adam Tippin <adamtippin at gmail.com> wrote: > > > > it would seem at least sufficient for our application. > > Is there a way to check resistance while the board with holes is in the > stowed position? > > > > > >> On Dec 30, 2014, at 7:17 PM, bjoenunley via KRnet <krnet at list.krnet.org > <mailto:krnet at list.krnet.org>> wrote: > >> > >> Belly board holes or no holes; > >> > >> I have considered making a belly board with holes and one without > holes. Attaching one at a time to a board where I can attach a scale. I > would then attach the system to the roof of my truck that I would drive > down an unused road. I would measure the air resistance at varying speeds. > >> > >> Do you believe that this would accurately correlate to flight? > >> > >> Joe > >> > >> > >> > >> > > > > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
