Maximum rate of climb - what is it ?

[Dariuszw]

Hi,

Few days ago I was departing Innsbruck on one of the SIDs which reads...climb at maximum rate of climb.... Discucion ensued between me and other pilot about what exactly is maximum rate of climb. Are we expected to climb at best rate of climb or best angle of climb. How should maximum rate of climb be interpreted ? Thanks for any advise.

[esreverlluf]

I might be missing something, but if it says "climb at maximum rate of climb", then it really doesn't take a lot of interpretation. . .

I wouldn't try to second guess their intention.

[Capt Claret]

Surely if they wanted maximum angle of climb, the SID would say, ... climb at maximum angle of climb.

Maximum rate seems pretty self explanatory.

[dash6]

Enough to out climb the terrain? Your call Captain!

[westhawk]

Meeting or exceeding the minimum climb gradient specified in the procedure should keep you clear of any terrain provided you remain on the procedural track. That said, any excess distance from terrain is welcomed as it allows greater safety margins (and options) in the event of a problem.

A procedure note calling for "maximum rate of climb" COULD be instigated by ATC RADAR and comm radio performance being affected by antenna site locations and associated line of sight limitations. Also the sooner an aircraft reaches the "top" of a DP the sooner it can be fitted into the enroute traffic flow.

As for how to interpret "maximum rate of climb", I would consider that to mean best AEO ROC speed at normal climb thrust/power in this case. Save the max thrust/max pitch combo for terrain and windshear escape procedures!

[de facto]

Few days ago I was departing Innsbruck on one of the SIDs which reads...climb at maximum rate of climb.... Discucion ensued between me and other pilot about what exactly is maximum rate of climb

I dont know about your kind of ops but to fly Innsbruck,you need special qualification as it is outside ICAO standards.
You are required to take SIM training specific for this airport with a TRE qualified by the Austrian CAA.

Now if you dont know what a max rate climb i doubt you have gone through any performance training and especially not for INN.

Due to terrain,take off flaps are kept until the 180 degr turn is completed and above a certain altitude,i remember accelerating when we were overhead the airport,there is max speed in the turn,maybe 156 kts..so if you fly faster your
radius will increase and terrain lateral clearance reduced.)
There are many missed approaches and engine out procedures depending where and when you go around/lose engine.

If your Part 91 cowboy outfit hasnt trained you,you may be operating illegally or outright dangerous.
You for sure shouldnt be qualified to fly there..

Here this could be useful :

Air Accident Investigation: Bundesanstalt für Verkehr
Trauzlgasse 1
A-1210 Vienna
AUSTRIA Tel.:[phone]
Fax: [phone]
Email: [email protected]
Website: versa.bmvit.gv.at - Verkehrssicherheitsarbeit für Österreich: Home *

[Brian Abraham]

I dont know about your kind of ops but to fly Innsbruck,you need special qualification as it is outside ICAO standards.
You are required to take SIM training specific for this airport with a TRE qualified by the Austrian CAA.

It's OK de facto. He's not a real pilot. It's SSG in a new dress. Search for SSG posts if you like comedy.

[Dariuszw]

When max rate of climb is posted on SID of Innsbruck it can easily be interpreted as max rate per unit of distance (best angle of climb) due to high terrein. Nevertheless, me as well you interprete that as max rate per unit of time (best rate of climb). My colique decided to fly closer to Vx rather then what I was suggesting Vy. Thats why I wanted to know what you think.

de facto - LOWI is class C airport and as such does require extra teraining, true. How much you want to bet no sim is required ?

[AerocatS2A]

The accepted definition of "max rate of climb" is maximum vertical distance over time. Your mate can interpret it as max vertical distance over horizontal distance if he likes, but he's all alone out there.

[de facto]

de facto - LOWI is class C airport and as such does require extra teraining, true. How much you want to bet no sim is required ?

What aircraft you are 'operating'?
I flew 737 there and the Austrian CAA required sim training.
Now you may have an aircraft which performance may not be limited as the 737(minimum speed in turn,map climb gradient...) but still if you are REALLy in the right seat of a commercial jet and dont know what a max rate is while flying into INN i am very worried indeed and I just cant imagine the chaos in IMC if some goes wrong...

My colique decided to fly closer to Vx rather then what I was suggesting Vy. Thats why I wanted to know what you think

What was the issue on your SID?????did you look outside?where was the tallest rock at?

[Dariuszw]

de facto, you and your lapdogs never stop to amaze me how one human being can be so grumpy and grouchy. If you not sure, then don't bark !