Yep. There is a decision altitude below which the engine is no option anymore.

Le mercredi 10 mars 2021 Ã* 10:38:28 UTC+1, a écritÂ*:
On Wednesday, 10 March 2021 at 02:01:56 UTC, jfitch wrote:
JJ
A marginal final glide in a motor glider (FES perhaps excepted) is a final glide in a glider in my mind.