Exeter,
Normally no. Retract servos are different from full proporational servos. The retract servos usually only travel 180°. And if you try to use a normal servo instead of a retract servo it will need to constantly draw power in order to hold it's position, which will drain the battery in a hurry. A retract servo goes to the end of it's travel and then stops, which doesn't draw any power to keep it's position.

Ken