Time, Fuel, Distance to climb chart

[skateosiris]

Hi I was wondering If anyone can help me with the Time, Fuel, Distance to climb chart for the C172?

So you first calculate the pressure altitude for your cruise altitude and the field elevation. Then say if you get a pressure altitude of 2300 for airport elevation and 4200 for cruise elevation, do you just use the 2000 and 4000 on the chart because thats what its closest to? Then subtract the difference in Gallons used for both, to get the fuel used for climb?

Any help would be greatly appreciated

 

[shdw]

Hi I was wondering If anyone can help me with the Time, Fuel, Distance to climb chart for the C172?

So you first calculate the pressure altitude for your cruise altitude and the field elevation. Then say if you get a pressure altitude of 2300 for airport elevation and 4200 for cruise elevation, do you just use the 2000 and 4000 on the chart because thats what its closest to? Then subtract the difference in Gallons used for both, to get the fuel used for climb?

Any help would be greatly appreciated

Yes, calculate what a climb from 2000-4000 will be and only use the Time and fuel portions. Unless you are in a no wind environment, which if you are I would love to know where so I can move there, then your distance will vary based on your winds/ground speed.

If you want to interpolate for 2300-4200 you certainly can, but to me it seems like a lot of extra work for a 0.1-0.2 fuel burn difference and less than 30 seconds difference on time. Don't forget the 1.1-1.3 gallons for the run-up, your chart will have this information in the notes under the climb chart.

 

[skateosiris]

Thanks for the reply,

If the distance is say 12 to my first point on the map to where I am climbing to, how would I find the time it takes as well as the fuel used for the climb and enroute fuel from the airport to the first map point. I am having some trouble with it, if anyone could explain it for the 172 Time, Fuel, Distance to climb chart that would be much appreciated.


I have another question about the Cruise Performance Chart.

Say the temperature is 5 degrees celcius, would I still use the information under the heading of "standard temperature"?

Because I noticed three headings, "20 degrees below standard temp", "standard temp", and "20 degrees above standard".

thanks

 

[shdw]

Thanks for the reply,

If the distance is say 12 to my first point on the map to where I am climbing to, how would I find the time it takes as well as the fuel used for the climb and enroute fuel from the airport to the first map point. I am having some trouble with it, if anyone could explain it for the 172 Time, Fuel, Distance to climb chart that would be much appreciated.


I have another question about the Cruise Performance Chart.

Say the temperature is 5 degrees celcius, would I still use the information under the heading of "standard temperature"?

Because I noticed three headings, "20 degrees below standard temp", "standard temp", and "20 degrees above standard".

thanks

For the bold, don't use the distance!!!!! The distance will vary with the wind speed/direction. Instead find the time, find your climb speed, apply the wind correction to your climb speed for ground speed and use ground speed and time to find your distance.

In this case +5 degrees is 10 below standard or exactly halfway between standard and 20 degrees below standard so interpolation would be advisable in my opinion. Standard = 15, 20 below that = -5 and +5 is right in the middle.


PS: For future questions like this your better off posting at http://forums.jetcareers.com/cfi-corner/ as this is where the CFIs will be swarming to answer questions. This forum is more for more technical aspects of flying as you can see if you skim through other posts here. Don't worry yourself though, nobody will hate you for asking it here but you will likely have better luck at the CFI corner.