Hey Bob and Team,

This question is in reference to Figure 29 on the VFR Day Booklet.

You are at X at 3500ft and plan to climb to 9000ft. With a groundspeed of 110kts, what is the ROC that will ensure a continuous climb in OCTA to 9000ft?

The way I did it was, because we are already OCTA at 3500ft, I did
9000-3500=5500ft

The distance covered between the two would be 50nm-22nm=28nm

So I will need to cover 28nm and a height with 5500ft. With maintaining 110kts ground speed and distance of 28nm it takes 15 minutes.

Therefore 5500ft and 15 minutes will give a Rate of Climb of 360ft/min.

Hope my working is correct, will need your advise on this working.

This is just a minor variation on a recent question you posted.

Now, there are three ways to go about the question -

(a) start your climb immediately, as you did, and blast up to your desired cruise level. However, does that create any problems along the way which, perhaps, you may have overlooked ?

(b) delay the start of your climb if, and as, necessary.

(c) start your climb immediately, with a ROC to suit any, and all, constraints.

Normally, one would run with (b).

Now, getting back to (a), what trap did you fall into ? Let me give you a clue -

The distance covered between the two would be 50nm-22nm=28nm

might offer a suggestion ....

If you end up in airlines, expect to see this from your check captain on a route check from time to time. Stock standard problem to pose to F/Os in particular.