City air or Country air !
In the rolling countryside , where the airs moveing from ' way off ' , a Clear ? run for miles
but rolling hills , Trees , the odd house and barn ; so it has whirls and pockets & can dump
etc. I.E. not constant or regular .but pretty much so , 60 %+ smooth . !
With the Little Phantom , 50 in about 500 in and near 50 Oz , the Std tips , a rib at 45 deg
to vertical , with all the air pressure at 18 - 20 Kt breeze; Vortice Wakes from Ea tip .
Maybe 6 to 10 ft. (Varies) were towing & / or loading the tips about, yawing with bit of /
occasional ' rock ' ( roll )
pun not intended.
In the Valley up the coast , the rolling air from trees and disturbances ( the GROUND is irregular
so the wind flow is more disturbed - rolling , balling , waves ,speed/presure) the MINOR rock /
roll is more evident. (60+ % turbulent , Maybe 30% smooth , if youre placed well )
SO , ' We ' added extensions to the top of the tips from high point aft, swept out going aft .
Testing was ' does it turn even ' ? chopping to + 1/2 span at T.E. got that near enough .
The tips resembled Grenemeyers Bearcat & a few of the P-51s, with a bit tacked on , as stated .
City air ! theres was still considerable but limited rock and a bit of bounce from the more irregular air
at around the 18 mph / knot windspeed . Yaw was very much reduced. Near eliminated .
Out in the rolling countryside the ' dragging the wingtips around ' previous to add ons had been eliminated.
BUT , when the wind got up to 25 mph ( + & - ) the pressure interface got leverage.
The only reasonable place was centreish of the field.
The air ' break up ' is UPWIND and downwind of trees.
Its starting to noticeably shift flow say 50 Ft upwind of Large ( 60 ft + trees )
Also when the lower Branches are say 10 ft above ground, the breeze flowing through there was creating
dangerous suction downward if one tried to wander into a bit of shelter. There wasnt any .
Proceeding with this lark , at 30 Kts, pressures were severe .
Good boots essential , Clothes blown everywhere (storm conditions)
Feels like the hair is vertical / on end . Also the occasional fast footwork is called for .
Jim Mannal's tretease on Flying F2B ( on Dave Days site ) gives some good tips on
Manouvre Entry and Positioning in these conditions ( a gentle breeze , you can still stand up ! )
The " Beaufort Scale " is far more practical for judeing strengths.
A reasonable aeroplane should be enjoyable to fly, utiliseing aforesaid tips
in strength where " Whitecaps are starting to form " .
Anything over say 18 Kts could be viewed as ' Extreme sports ' and liable to ' raise a sweat '
and require severe ? mental & some physical exertion .
This is why sports fields have changeing rooms , Also a 'warm up ' is usefull for full physical mobility
as limited movement may impede control.
The dozyiest plane to fly in calm air still handled 20 Kt winds, But the parrallell depth spars ,
Same thickness tip and root , had a near constant 5 - 10 Deg ( + ) rocking going about .
Id thrown 200 % Vert Stab Volume with A rather bird wing section fin /rudder on for this .
Comparable to 60s ships such as Argus , Atom , Aries etc, where the clean flowing lines
slide through the turbulant stream (of air) like a fish.
Bob Hunt was impressed with the '40-35' sized planes ability to deal with turbulance , without
exceeding the pilots ' comfort '
Zones.
Yachting with ' the old man ' Keeler ' , water 1/2 up side windows . " Not really starting to blow ,
she's hardly moving . The waters right over the side windows when shes starting to go properly.
(20 - 25 Kt breeze ). I hope there glued in Properly !