ISoar

What about this situation: You are on your fifth solo flight and OOOH
NOOO! your yaw string disintigrates while under tow. No, this never
happens does it? (Happened to me once: Club 1-26 with brand new canopy
& no yaw string. Damn it wasn't on my pre-flight checklist! How could
I have missed it?) But if it does what better way to fly the pattern

Hmmm...yet another instrument with no required backup. Yaw string
outside, maybe a ball inside?

P.S. Always remember: Proper pitch attitude control is imperative when
executing this maneuver as the IAS will almost certainly not be
correct.

Yet another instrument with no backup. (most) Airplanes have a
stall horn as the ASI backup. I'm still puzzled why gliders
don't have stall warning devices...