Quote:
Originally Posted by gumby79
Is the 250mph a local air velocity or movement speed ?
In the A&P study book it was talking about the slats& flaps were retractable for low angle of attack flight,not a speed but angle thing.
---YOU SEE the same principles applied to the front as a air curtain to maintain attachment past the front tires. And theas work at normal people road speeds (well below 250)
Attachment 20218
The 1/8" ×3" flat strap was added to keep ladders and 20'sticke of steel off the sheet metal roof. An top hafe air foil was carved for the top surface (that was set @0° level). But it snaped when I was bending into shape. I think the flat strap helps restableize the turbulence from the cab-bed gap, and redirect it down the cap
Gumby Stay Flexible |
*It would be the road speed,as the body of the car could generate local velocities (especially over the roof) of the transonic range.
*Retractable slots/slats would be a necessity unless you were doing a homebuilt copy of a Storch,which it's design mandated the fixed air dicers.
*The upper wing camber of of a cargo spar would be good! It's at zero angle of attack,and zero lift,just like a Clark-Y (Hershey Bar) wing on a Piper Cherokee.
*Curving the strapping would produce lift,and you would have a downwash towards the cab roof.There might be a point where the strapping became aeroelastic and begin to deform into a flutter mode,ultimately destroying itself unless dampened by some sort of structural support.