New Vent!

On Dec 9, 3:11*am, "Matt Herron Jr." wrote:
What keeps rain, wasps, mice, etc. from entering the vent hole when on
the ground?

The same thing that keeps them from coming in through: the apple core
window, the nose vent, the spar carry through, the wheel well, ie.
nothing :-)

Look at it this way - when the ship's assembled and on the line,
there are lots of easier ways for varmints to get in. When it's
disassmbled in the trailer, there are huge holes where the wings used
to be.

On Dec 9, 1:36*pm, Papa3 wrote:
On Dec 9, 3:11*am, "Matt Herron Jr." wrote:

What keeps rain, wasps, mice, etc. from entering the vent hole when on
the ground?

The same thing that keeps them from coming in through: *the apple core
window, the nose vent, *the spar carry through, the wheel well, *ie.
nothing *:-)

Look at it this way - *when the ship's assembled and on the line,
there are lots of easier ways for varmints to get in. *When it's
disassmbled in the trailer, there are huge holes where the wings used
to be.

Well rain could be an issue in flight particularly if all the inlet
vents are closed to keep the water out. Maybe the MkII version will
have a remote controlled closing flap.

I'm more interested in real performance numbers though. I don't mind
getting the back of my head wet a couple of times a year for a gain 50
fpm at 90 kts. 0.001 fpm at 90 kts and maybe it's not worth the risk
of getting wet.

Andy

On Thu, 9 Dec 2010 13:27:59 -0800 (PST), Andy
wrote:

I'm more interested in real performance numbers though. I don't mind
getting the back of my head wet a couple of times a year for a gain 50
fpm at 90 kts. 0.001 fpm at 90 kts and maybe it's not worth the risk
of getting wet.

If Francisco de Almeida's (Hi pal!) math is correct, and ventilation
at 100kts really costs 30W, then I believe we're talking about a
potential reduction in drag between 0,5% and 0,1%.

Well, my math isn't going to pass any tests...

aldo cernezzi