Bill=0Athe stall characteristics are dependent on the quality and accuracy
of the =0Aleading edge. LE is relatively small radius and its all too easy
to sand the =0Abump off with the effects you mention. In UK we are told to
use stall strips or =0Aa stall warner.=0AStall strips are recommended and i
f carefully adjusted will calm the stall. Get =0Ahold of the digital print
out of the section and make templates every foot or so =0Aspanwise. Then sp
end hours and hours getting the section right. There is a tiny =0Abump unde
r the LE which is important but hard to spot.=0AGraham=0A=0A=0A=0A=0A=0A___
_____________________________=0AFrom: William McClellan <wilwood@earthlink.
net>=0ATo: "Europa-List@matronics.com" <Europa-List@matronics.com>=0ASent:
Tuesday, 3 August, 2010 16:50:07=0ASubject: Europa-List: Stall spin charact
@earthlink.net>=0A=0AI understand that the Europa is very prone to abruptly
dropping a wing, trying =0Ato enter a spin, when stalled with full flaps i
n the landing configuration. On =0Athe other hand, in the clean, unflapped
configuration the stall is very benign. =0AI wonder if this is true of al
l Europa's or only some depending on the =0Aparticulars of that builders en
d product and possible modifications. I have =0Anearly 1000 hrs in a Citab
ria with very much of it flying into short =0A"backcountry" dirt strips req
uiring significant STOL characteristics. I don't =0Ahave flaps so regularl
y use severe straight and banked slips. The Citabria is a =0A"dirty" plane
compared to the "very clean" Europa so I believe the use of severe =0Aslip
s in the Europa is never warranted. My experience with very clean planes,
I =0Aalso have 1000 hours in my high performance glider and since the air b
rakes work =0Aso well, severe slipping is not needed...though some less tha
n ultra clean =0Agliders, ie, trainers, can make use of severe slipping!=0A
. It seems likely that Cliff Shaw's accident was a result of this abrupt s
pin =0Astall characteristic in landing configuration. I have a rule (thoug
h not =0Aunique), "never skid a turn", keeping a nice margin above stall.
It seems that =0Athe Europa (and probably all super clean planes, for insta
nce the Cirrus), have =0Aa propensity to severe stall spin in landing confi
guration. I understand that =0Amany Europa pilots land with an airspeed up
to 65 but this uses a greater =0Alanding distance considering the stall sp
eed is in the 40's. Europa's original =0Atouted mission was short field, p
asture strips. For those who often use this =0Ashort field capability, I w
ould like to know the particulars to make the Europa =0Aperform safely in t
his manner. Not having piloted a Europa, but am close to =0Afinishing my b
uild, I am curious to these questions.=0ABill McClellan=0A=0A=0A=0A=0A=0A
=================
|