Solved

Help with rate of climb question aviation

Posted on 2013-05-11
2
349 Views
Last Modified: 2013-05-12
Hi,

I have been trying to work out how to calculate the following question.

You calculate that you need to achieve a climb gradient of 440 ft/ nm in order to clear a small hill. What is this expressed as a 'rate of climb' if your groundspeed is 90 knots?

The answer is 660ft/min.

The previous question that I worked out by doing height = distance x angle / 60.
Which asked approximately what height would you be on a three degree glideslope 3nm from the aerodrome. I converted 3nm to 18228 feet x 3 / 60 to give 911 feet. Which was ok.

I am not sure if this is using the 1 in 60 logic?

I am trying to work out how to get to the 660ft/min.

Thanks for the help.

Regards,

Ross
0
Comment
Question by:ross13
2 Comments
 
LVL 21

Accepted Solution

by:
CompProbSolv earned 500 total points
ID: 39158294
If you are traveling at a ground speed of 90nm/hr for one minute you will have traveled 90nm/hr * 1 minute * (1 hr/60 min) = 1.5nm.  If you are climbing at 440ft/nm for a ground distance of 1.5nm you will have climbed 440ft/nm * 1.5nm = 660ft.  You climbed this amount in 1 minute, so the rate of climb is 660ft/min.
0
 
LVL 84

Expert Comment

by:ozo
ID: 39159159
angle / 60 is because tangent(1 degree) is approximately equal to 1/60
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Calculator Question 8 50
Adjust number proportionately 12 72
C/R - what does it mean in postal address 2 82
What is sqrt( (x+b/2a)^2) 35 66
This article seeks to propel the full implementation of geothermal power plants in Mexico as a renewable energy source.
We are taking giant steps in technological advances in the field of wireless telephony. At just 10 years since the advent of smartphones, it is crucial to examine the benefits and disadvantages that have been report to us.
This is a video describing the growing solar energy use in Utah. This is a topic that greatly interests me and so I decided to produce a video about it.
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

825 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question