Bill,

I like the 'neutral-force' idea, and I think I have actually felt that
a little bit on my Ventus. I'll keep looking at that. As for
building a drag meter, I looked through the articles you referenced
and beat a quick retreat. I would be much more likely to do serious
damage to my glider (and/or me) than I would be to do anything
positive! ;-)

Frank


On Mar 29, 8:45*pm, "Bill Daniels" bildan@comcast-dot-net wrote:
Some will suggest feeling for the aerodynamic neutral-force point with the
flap handle. *The idea is that the lowest drag configuration is with the
flaps in trail. *I think I remember reading that minimum drag is slightly
positive from the neutral force point.

Building a flap 'drag meter' isn't too difficult. *Jim Phoenix has pictures
on his site of building one for his Nimbus 3. *Pilots who fly with a drag
meter say they can 'dial in' the minimum drag flat setting for any airspeed.

Bill D

"Frank" wrote in message

...



At the risk of having my ignorance exposed (again), is there any way a
reasonably competant (another problem in my case) can determine
"optimum" flap settings for the most commonly used speeds/
configurations, without resorting to a full-blown Johnson-style test
program?

I have been flying my new (to me) Ventus 2bx for a year now, and am
reasonably comfortable with the following flap settings (speeds in
kt):

40-60 Flaps L, +2, +1 dep on thermal characteristics
60-80 Flaps 0
80-100 Flaps -1
100+ Flaps -2, only happens on badly planned final glides or with
ballast.

However, I'm not sure how efficient these values are for my glider.
Should I stay with 0 all the way to 90kt, or maybe switch to -1
earlier? *I mean, I've already give everyone else a big lead just due
to the IQ drop I experience immediately after release, so I'd hate to
think that I'm costing myself even more with poor flap settings!

I have played around some with watching the vario in cruise (TE) mode
to see if it makes much difference between 0 and -1 at say, 70kt, but
it's awful hard for me to tell. *Anything else I should be looking
for?

TIA,

Frank (TA)- Hide quoted text -

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