The Egyptians did not have helicopters or aircraft. That is a fact! Some hieroglyphics in the Temple of Osiris at Abydos appear to depict highly developed crafts of different levels of technology, specifically a 1960s era helicopter, a submarine like the Civil War Hunley, some form of flying saucer of the far future, and a jet plane with a tail that is too big.
Acording to www.catchpenny.org “The glyphs are a result of both erosion of the stone surface (evident elsewhere in the temple) and the process of filling in and re-carving the stone to replace some of the original hieroglyphics. The technical term for such a surface that has been written on more than once is a palimpsest. The usurping and modifying of inscriptions was common in ancient Egypt throughout its history. The Abydos glyph was modified at least once in antiquity, and perhaps twice. Some of the filling has fallen out in places where the older and the newer inscriptions overlap, and the result is unique and odd-looking.”
Glyphs super imposed.
“The text is part of the titulary of Ramesses II and can be translated as "The one of the Two Ladies, who suppresses the nine foreign countries." This replaces the royal titulary of Seti I that was originally carved into the stone. More technically, the actual "helicopter" seems to be a portion of the psd.t sign and the X3s.t sign on top of each other, with portions missing. An apparent change in scale also mucks things up.”
Glyphs in context.
Like I have said in earlier post, we know about Ancient Egypt. There are numerous artifacts and lots of writing. The Egyptians were conservative. They maintained the status quo, thus Egyptians were not innovators and thus were not interested in experimenting with advanced technologies. “If the ancient Egyptians had vehicles such as helicopters, submarines, and jet airplanes, one would expect to find some evidence of this other than in a single inscription on the lintel of a single temple. This type of large machinery requires a vast amount of support (including fuel, parts, factories, etc.) but there is no trace of any such support in all of Egypt. The Egyptian literature is also bereft of any boast, much less passing mention, of advanced aircraft.”
All artifacts found are Bronze Age type. The Persians were able to defeat the Egyptians (would that have been possible if the Egyptians had had advanced technology?), and Alexander the Great was later able to defeat the Egyptians, and he did not pick up helicopters from them.
The Egyptians would have had no use for a submarine. They sailed up and down the Nile, going North by drifting with the current going south by sail. They hardly ever ventured into the open sea.