I'm bored with cabin fever, so why not talk about how rubber meets...


All turns, whether on the ground or in the air, have one immutable thing in common: there must be a lateral force to cause an object with momentum in a straight line trajectory to change that trajectory...

Here's the logic I'm hearing here.
The glider has momentum which must be countered to make it change direction.
The wing wheel provides this because there is no other place for it to go.

Given that a glider with a castering wing wheel can still turn, perhaps the main wheel can provide most of the turning force?