That sounds like a cooking instruction for a non-fan oven. Without a fan there are temperature zones in a [gas] oven with the lower shelves at a lower temperature than the higher shelves. In a gas cooker, the setting for gas mark is [usually] the centre shelf; the top shelf is about 1 to 11/2 gas marks higher (about 25-37oF, 14-21oC hotter), the bottom shelf is about 1 to 11/2 gas marks lower (about 25-37oF, 14-21oC cooler) - the differences will be in the cooker's manufacturer's instructions. By putting the cream puffs of a lower shelf, they are baked at a lower temperature than that at which the oven has been set, allowing the baking of something else on a higher shelf at a higher temperature at the same time.
The fan blades.
IF the fan speed in RPM is given, multiply this figure by 60 to find the number of rotations the fan makes in an hour.
136 * * * * * Actually there are 17*16 = 272 angles. Assuming the rays do not meet at 180 degrees, each pair of rays forms two angles: one less than 180 deg and one greater.
At least half.
662 degrees Fahrenheit.
400 degrees Fahrenheit is approximately 204 degrees Celsius in a fan oven.
350 degrees Fahrenheit is equivalent to approximately 177 degrees Celsius in a fan-forced oven.
200 degrees Celsius is equivalent to 392 degrees Fahrenheit in a fan oven.
375 degrees Fahrenheit is equivalent to approximately 190 degrees Celsius.
190 degrees Celsius is 374 degrees Fahrenheit.
Most recipes call for the oven to be at 350 degrees Fahrenheit, although either the length of time the chops are cooked for or the temperature of the oven will need reducing if the oven is fan assisted.
A fan oven is generally set lower than a traditional oven. The cooking time is also a few minutes less than in a traditional over. If a traditional oven should be set at 375 degrees to cook something, a fan over would be set at 325 degrees.
For temperature times with a fan oven, you need to subtract about 10 degrees from the conventional oven time given. So, for 160 degrees F in a conventional oven, you would set a fan oven at 150 degrees F.
To convert 180 degrees Celsius to a fan-assisted oven temperature, you would typically reduce the temperature by about 20-25 degrees Celsius. Therefore, 180 degrees Celsius in a fan-assisted oven would be approximately 160-155 degrees Celsius.
160 degrees Celsius in a fan assisted oven is equivalent to about 180 degrees Celsius in a conventional oven. In a fan assisted oven, you typically reduce the temperature by about 20 degrees from the conventional oven temperature to achieve the same result due to the circulating hot air providing more even heat distribution.
the convection oven is the same as an ordinary oven except it is fan forced like some ordinary ovens. you need to reduce the suggested temp by 10 or 20 degrees depending on the available preset degrees. the fan force makes the oven cook evenly throughout but there could still be a a little variation. hope that helps