Contents

- 1 What is VX speed in aviation?
- 2 What is VX flight?
- 3 What is VX in a Cessna 172?
- 4 How is VX determined?
- 5 Why does VX increase with altitude?
- 6 Does VX change with weight?
- 7 What is best angle of climb?
- 8 What is best climb rate?
- 9 How fast does a Cessna 172 need to go to take off?
- 10 What is the landing speed of a Cessna 172?
- 11 What is VX poison?
- 12 How do you get V with VX and VY?
- 13 Why does TAS increase with altitude?

## What is VX speed in aviation?

An aircraft climbs because of excess thrust or excess power. Vx is your best angle of climb speed, and Vy is your best rate of climb speed.

## What is VX flight?

VX is known as the ‘Best Angle of Climb’. This is the speed that gives you the most altitude in the shortest distance. VY is known as ‘Best Rate of Climb’. Gives you the most altitude in the shortest time.

## What is VX in a Cessna 172?

There are two climbout speeds that we aim for when we’re taking off: best angle of climb ( VX ) or best rate of climb (VY). The PTS stipulates that you use the best rate of climb (VY) for a normal or crosswind takeoff.

## How is VX determined?

Vx is located where you have the most space between the thrust required and thrust available lines. So, if you plot it for several altitudes, you can see it move to the right slightly as you climb. Vx’s true airspeed increases as you climb. But, that’s true airspeed, not indicated.

## Why does VX increase with altitude?

Therefore, dropping straight down from the tangent point (point A) to point B, we find that the best angle of climb speed has increased to 75 knots. And this is the basic reason why Vx increases with altitude.

## Does VX change with weight?

Vx and Vy change as DA goes up and change with weight. For every 1000′ increase in altitude Vx increases approximately 0.5 mph and Vy decreases 0.66 mph. Also remember Vx & Vy speeds decrease as weight decreases. Vx and Vy can be reduced ½ of the percent of weight reduction.

## What is best angle of climb?

Best Angle of Climb speed (V_{x}) gets you the greatest altitude per unit of ground distance (feet per mile). When you’ve got a FAA-Standard 50-foot-tree at the departure end of the runway you’ll aim for the best angle of climb to ensure you don’t wind up in the tree.

## What is best climb rate?

Best Rate-of-Climb:

- Best rate of climb, or Vy, maximizes velocity to obtain the greatest gain in altitude over a given period of time.
- Vy is normally used during climb, after all obstacles have been cleared.
- It is the point where the largest power is available.
- Occurs above L/Dmax for a jet.
- Occurs at L/Dmax for a prop.

## How fast does a Cessna 172 need to go to take off?

60 knots is considered to be the optimum takeoff speed. This speed will allow enough lift under the wings to give a smooth, stall-free takeoff. What is the landing speed of a Cessna 172?

## What is the landing speed of a Cessna 172?

The 172S POH recommends 61 knots for a final approach speed for a short field landing, which is 9 knots faster than 1.3 X Vso. As for the Cirrus SR22T, they recommend 80-85 knots on final, and 79 knots crossing the threshold.

## What is VX poison?

VX is an extremely toxic synthetic chemical compound in the organophosphorus class, specifically, a thiophosphonate. In the class of nerve agents, it was developed for military use in chemical warfare after translation of earlier discoveries of organophosphate toxicity in pesticide research.

## How do you get V with VX and VY?

- To get v x,y you can just take the time derivative of x(t) and y(t).
- The idea is that v0 will not change through the whole motion, what will change is the ratio between vx and vy but it should always be equal to the desired speed v = sqrt( vx ^2 + vy ^2) should always be equal to the set velocity.

## Why does TAS increase with altitude?

For a given power setting, True Airspeed increases with altitude because there is less drag due to the air being less dense. Aircraft are more efficient at high altitude because of this simple fact.