Steve,

The stall occurs at CL max not L/D max (by definition). A wing is stalled when any further increase in AOA results in a reduction in CL.

I agree that most modellers have a very sketchy understanding of stalling, stall speed, critical Angle of Attack, accelerated stalling, asymmetric (wing drop) stalls, and tip stalling.

I applaud you're attempt to improve the knowledge, good luck.

Some definitions that may help;

Stall= exceeding the critical angle of attack or CL max.
Stall Speed= the speed at which the stall will occur in level (1 G) flight, power off.
Accelerated Stall= stalling at more than 1 G, implies at a speed greater than 'stall speed'
Asymmetric stall= one wing stalls before the other, may be due to flying 'out of balance', manoeuvring (turning, rolling etc), wing warp or aileron deflection etc. not all asymmetric stalls are 'tip stall'. If the wing stalls from the root first then the wing drop from an asymmetric stall may be quite controllable with aileron and/or rudder.

Tip stall= if a wing stalls from the tip first (bad design feature) then any asymmetric stall will be much more violent. Any attempt to use aileron will likely make the wing drop worse.

Most modellers refer to all wing drop stalls as 'tip stalls' even though most of them are just asymmetric stalls.

This leads to forum questions along the lines of how do I fix tip stalling with answers along the lines of washout, change of section, root leading edge stall strips, just fly faster, etc.

If the question had been how do I fix wing drop stalling then the answers might have included; check wing symmetry, length, sweep, squareness to fuselage etc. try some rudder etc.

My advice to all modellers is stall your model lots, get used to where the elevator stick is when it stalls. Every time you put the stick in that position your model will stall. If you find yourself turning final low and slow or making a tight turn and you notice that the Angle of Attack (elevator) stick is near the stall position then be aware that you are near the stall. Speed or angles (bank or climb or descent) are irrelevant.

Not quite 100% true in theory but close enough in practice.

Dave H