In reply to post 19, we have a tremendous problem with the proximity of the trees. Washing the whole aircraft can take several days, so an anti alge solution has been applied. From washing once every six months, the period has been extended to about once every two years. Interestingly, the wing nearest the trees has remained clean while the port wing is in need of a clean. This is probably due to the fact that when that wing was treated, it was followed by a rain shower.
Regarding the runway length, the figures are 3750' and with the extension 4150'
The width was 255'