Bob Gregory
Member
I have some numbers for the crunchers
Bob, this will not answer your question about flat plates.
This is to show the conservative lift values of D Riley's measured
results of a 0012 airfoil.
D Riley's data is 58 percent of the flat plate and 20 percent of
the HS_liftcalc airfoil. I placed his at -4 degrees and theirs
is unknown. So his figures are very conservative for a 0012
airfoil of their unknown airfoil. D Riley's foil would have be
set in the seven degree negative vain to be consistent with
the HS_liftcalc foil figures. This would add drag to
counteract the propeller PPO force and add pounds for
the rotor to lift. I think I would limit the stabilizer to minus
three degrees and add area to balance.
If I was to build a stabilizer it would be an upside down airfoil
for maximum down force with the least material. Dick Degraw,
I believe, used an upside down foil on one side of the
stabilizer for torque roll control on the Gyrhino.
There are four to six places to "What If?" The D Riley area
uses his data and the other four use the air density chart.
Bob, this will not answer your question about flat plates.
This is to show the conservative lift values of D Riley's measured
results of a 0012 airfoil.
D Riley's data is 58 percent of the flat plate and 20 percent of
the HS_liftcalc airfoil. I placed his at -4 degrees and theirs
is unknown. So his figures are very conservative for a 0012
airfoil of their unknown airfoil. D Riley's foil would have be
set in the seven degree negative vain to be consistent with
the HS_liftcalc foil figures. This would add drag to
counteract the propeller PPO force and add pounds for
the rotor to lift. I think I would limit the stabilizer to minus
three degrees and add area to balance.
If I was to build a stabilizer it would be an upside down airfoil
for maximum down force with the least material. Dick Degraw,
I believe, used an upside down foil on one side of the
stabilizer for torque roll control on the Gyrhino.
There are four to six places to "What If?" The D Riley area
uses his data and the other four use the air density chart.