Search results

Hello everyone, I'm back to discuss windmilling and trying to separate facts from fiction. Everyone agrees that a windmilling propeller is undesirable, but how do we explain why? The most common analogies are: -it's like holding a disc into the wind the size of the propeller. This is...

Hi everyone, As seen in this image, the power available curve increases with TAS and I'm not sure I can explain why other than mathematically: https://www.boldmethod.com/images/learn-to-fly/performance/vx-vy/power-available-animation.gif Power = thrust * TAS so obviously if TAS increases more...

...with a complicated answer. Hi everyone, In short, what actually causes air to accelerate over the top of a wing? In long, the often taught "equal transit time" theory that airflow at the top travels a longer distance and therefore must accelerate to reconnect to the bottom flow is...

Hello everyone, I read that during a descending turn, the high wing (outside the turn) has a smaller AOA than the low wing (inside the turn). I have trouble making sense of that as in order to be higher than the low wing, it would need to generate more lift. Why wouldn't the high wing have the...

Hi everyone, I'm currently studying for my CFI and making sure that I have a good grasp on various topics of aerodynamics. I was fed pat answers as a student that made sense, seemed logical but turned out to be completely false. This impeded my comprehension and ability to learn other topics...

Hello everyone, long time no see! I've been very busy the past couple years and put my commercial training on standby. I have now saved enough money to dedicate my full time to finishing my ratings. I have my 2nd class medical, PPL, Instrument Rating and meet all the prerequisites for the...

Hi everyone, I read that the AoA increases in both a downdraft and updraft. I can visualize that being true in a downdraft. If we were to take an aircraft trimmed for straight and level cruise flight, it would suddenly pitch up and at the same time follow a downward trajectory, the chord line...

Hi everyone, I originally learned that in a stabilized climb or descent, the load factor is 1G which for all practical intents and purposes is close enough to correct. Following the example in this thread...

Hey everyone, Another question this time regarding aerodynamics. I understand that the one and only thing that matters for stalls is the angle of attack, and that the airspeed at which it occurs is only relevant because we don't have an angle of attack indicator on most GA airplanes...

Hey guys, As I'm preparing for my commercial oral I'm going over the constant speed prop. Do you agree with this illustration (found online) of ground idle and take off blade angles? I was expecting the take off blade angle to basically look like the ground idle. My reasoning is that when...

Hey everyone, Something I always wondered is if the altimeter setting we get in the US from the ATIS (or any AWOS/ASOS for that matter) is corrected for temperature at the field? The FAA Pilot handbook says "Altimeter setting is defined as station pressure reduced to sea level" so I'm inclined...

Hi everyone, First post here and I'd like to start off with a weather question. Looking at this chart http://en.citizendium.org/images/b/b3/Lapse_rates.png It looks like the steeper the temperature gradient and the more unstable the atmosphere. However I would kind of except the...