[Prophet in the wilderness]

Jet Planes have a thing called a RAT ....
It's a turbine that pops out when all electric power is lost, but, it is only good at higher altitudes when the pilot can point the nose of the plane down and gain airspeed.... long enough to regain some control of a plane and give them time to find a airport.

[AFreeBird]

but, it is only good at higher altitudes when the pilot can point the nose of the plane down and gain airspeed....

I would think that since the RAT has to be used for landing; low speed, low alt., and nose up, that having to point the nose down would not be that large a requirement. If you have enough airspeed to keep the plane in the air, you should have enough air to turn the turbine for the required power.