On 18 Mar, 22:59, Darryl Ramm wrote:
On Mar 18, 3:34*pm, Jim Logajan wrote:

The Real Doctor wrote:

On 18 Mar, 01:38, Darryl Ramm wrote:

As I explained, Gravity provides the energy...

Then you will need to explain how gravity provides the energy when the
glider is climbing.

Just curious, but are you being pedantic?

Just an extreme case of rasterbation. If he keeps it up he will go
blind.

Go on then. Explain how "gravity provides the energy" when a glider is
climbing ...

Ian