Final answer:
The maximum holding speed for a propeller aircraft, including turboprops, is the stall speed, which can vary depending on factors such as the aircraft's weight, wing design, and atmospheric conditions. Civil turbojets do not have a specific maximum holding speed, but they may have a recommended climb speed during climbing.
Step-by-step explanation:
The maximum holding speed for a propeller aircraft, including turboprops, is the speed at which the aircraft can maintain a stable altitude and is typically referred to as the stall speed. This speed can vary depending on factors such as the aircraft's weight, wing design, and atmospheric conditions. For example, a typical stall speed for a small propeller aircraft could be around 40-60 knots (46-69 mph) while a larger turboprop aircraft may have a stall speed of around 80-100 knots (92-115 mph).
A civil turbojet, on the other hand, does not have a specific maximum holding speed as it is primarily designed for high-speed flight. However, during climbing, the aircraft may have a recommended climb speed, which is the speed at which it can efficiently gain altitude. This speed is usually higher than the stall speed and can vary depending on the specific aircraft and its weight. For example, a typical climb speed for a civil turbojet could be around 250-300 knots (288-345 mph).