psuguru said it best. The wing always stalls at the same angle of attack. The only thing that will change the airspeed you reach said angle of attack is wingloading. Wingloading is determined by the weight of the aircraft, and flight loads ie: high G manuevers, and the elevator pulling down on the tail to counter a nose heavy A/C. The key word in all of this is airspeed. Many beginers fly mistakenly in reference to ground speed. A decrease or lack of a headwind means you need a higher ground speed to maintain your airspeed. Your ground speed and track can change drasticly with wind and can cause a lot of dangerous (mostly for the plane) miss-conceptions about how the plane is performing. A great tool for learning to fly a model A/C is reading up on the physics of flight. Another great idea is to get it up high, slow it down and fly it on the verge of stall in all directions and see how it feels crosswind, into, and against the wind. Once you are comfortable with this you will find you can better feel if you are slowing down to much.