Very little in aviation is free. Some aircraft have them as part of a kit when they are delivered and these remain on the aircraft in a box stored in various locations dependant on the aircraft type. Many are never used. The recent panic over ash fallout had the operators looking for engine and various other assorted blanks. Some could not be located hence the improvised use of whatever could be considered as suitable.
In discussion with a colleague last week when it became apaarent that there was a shortage of blanke we both wished we could be in the position to manufacture as we could have made loads of money. Now the panic is over for the moment, blanks will again be seen in various locations gathering dust or getting lost until the next need arises.
The use of the 'membrane' intake cover has increased over the years. The older typr tended to be a solid plastic blank which when not in use was difficult to store and often damaged when left lying around.
On the Court Line Tristars the engine intake blanks were simillar to kiddies paddling pools. Needless to say they soon went missing.
Let's give everyone a bit of space here shall we and not be so quick to jump on someone when they ask what they consider as a reasonable question.
Temps
