You know, I've been flying FX 67-150 and -170 airfoils for years. I've
smashed thousands of bugs, flown through many rain showers and even
collected substantial ice on occasion yet I've not seen any unusual
performance degradation when analyzing flights with SeeYou nor did I feel
any in flight. In fact, those glides with crappy wings often show a
height/distance ratio well above the published L/D. I know Bob Faris gets
great results with his LS-3a in the same conditions. I wonder if these
airfoils are getting a bad rap.

There are PC software programs that will interpolate airfoils and generate
intermediate templates. Just save the results as a .dxf file and email it
to a laser cutting shop so they can make a complete set of templates. I've
had them made out of Plexiglass with laser alignment holes. A complete wing
set should cost no more than a couple of hundred bucks.

In fact, if you just like airfoil shapes as wall hangings, your local
plastic/sign shop can burn them on its laser cutter from .dxf files.

wrote in message
...
On Oct 21, 6:45 pm, Robert Fidler
wrote:
Will be refinishing and profiling a LS3A this winter. Need the wing
profile
data which manufacture will not share.
Does anyone out there have tha data they would be willing to share with
me?

email

Bob Fidler

Careful about free advice! It ain't just about waves.
The 67 series is very sensitive to correct profile on the leading
edge.
A few measurements should show linear taper root to tip with airfoil
doing the same thing.
The bad news is that to make templates , you have to plot the airfoil
at each station interpolating between the 67-170 and 67-150.
You don't really want to know how I know this. It's painful.
Look up the series Dick Johnson wrote on improving the PIK-20 which
uses the same series airfoils.
There is much to learn in these articles.
Good luck
UH