christina3hunt
New Member
What is the difference between takeoff ground roll and total takeoff distance? And landing ground roll, total landing distance??
The performance chart you are looking at should tell you what "total distance" it is measuring. Usually it is, as others said, the total lateral distance you need to take off and clear a 50' obstacle.What is the difference between takeoff ground roll and total takeoff distance? And landing ground roll, total landing distance??
What does 91.203 have to do with performance calculations?maybe "total" is referring to the inclusion of a 50' obstacle.
every single flight we do at my school requires figuring out those numbers. anyone else? ever read 91.203?
CYA.
every single flight we do at my school requires figuring out those numbers. anyone else? ever read 91.203?
CYA.
ever read 91.203?
I wanted to address this real quick, too...
91.103 requires pilots to "become familiar with" performance data for the flight. Notice that it doesn't specifically require pilots to perform exact calculations prior to each flight.
I'm sure MidlifeFlyer could explain the legal side of this better than me, but I have always interpreted that reg to mean if a pilot has a good understanding of the scenario (such as my statement about knowing a 172 can almost always get off the ground in 2500 feet) and determines the situation to be safe, it is acceptable to fly without precise calculations.
Yes, but...I think in a flight school environment, it is good to have them calculate w/b, takeoff/landing distances for a few reasons, one of which is to keep them proficient doing it, so when the checkride comes, they will be familiar with it.
...and, jrh, I don't have a legal explanation, just a common sense one. The best I can come up with as a legal explanation is that you'll be in trouble if you run off the runway
lol....
I think he meant 91.103
:yeahthat:I wanted to address this real quick, too...
91.103 requires pilots to "become familiar with" performance data for the flight. Notice that it doesn't specifically require pilots to perform exact calculations prior to each flight.
I'm sure MidlifeFlyer could explain the legal side of this better than me, but I have always interpreted that reg to mean if a pilot has a good understanding of the scenario (such as my statement about knowing a 172 can almost always get off the ground in 2500 feet) and determines the situation to be safe, it is acceptable to fly without precise calculations.
The other thing that influenced me to grab onto this importance was reading a write up about the test flights that compiled the landing distances in the POH.