Cessna 210 Question
 

My instructor never explained this to me ;

On the C210 you have a placard which provides you with the fuel flow on take off.

SL - 4000ft : 144lbs/hr - 2850 rpm

My question is do you use field elevation to calculate the fuel flow or should you use density altitude.The POH says field elevation, but on a hot day your DA can be 7000ft so your fuel flow should be alot less.

Please explain this to me

Thank you

Always be on the safe side, so if you need less, you get more safety margin. The C210 POH and Cessna tell you to use that number, that's it.

Overfueling can hardly be considered "safe"?

Both ChickenHouse and Dera are right.

The correct way to adjust the mixture for takeoff at high DAs is to lean until the engine just runs smoothly with T/O power set. This will inevitably be slightly rich. At high power settings however, slightly rich is less potentially damaging to the engine than slightly weak.

I would suggest that the figures shown on the placard are a guide to approximately what you should expect, rather than a figure that you should set, but I agree that it would be better if it showed density altitude rather than airfield elevation.


MJ:ok: