Well, I happen to have Chilton's book, so I know his quote is accurate. And for months, I used to talk with a minister at the church we were going to who worshiped the ground Ryrie walked on, so I also know the stance on pure literalism was one of Ryrie's biggest things in interpreting the Bible. And, with all that, I am very willing to wager *Stranger* some serious money (I said CASH) about what Ryrie is also credited here with saying about the "locusts" possibly being helicopters or some other modern war machine. (Just as soon as he grows up some and quits trying to play these silly school boy games.)
You would lose that 'bet' (which Christians are not to do by the way), as the 'locusts' (Rev. 9) are described in the OT itself, re-utilized in the Rev. on a great scale, going from literal in the OT (which have no king; Pro. 30:27), to spiritual, that do have a such a 'king' (Rev. 9:1,11, see also 11:7, the 'beast' is the 'king' thereof, being the 6th 'head' of Rev. 17). There are several times that 'locusts' are mentioned, especially in Exo. 10 with Moses (and dealing with the Sanctuary on the whole as a greater picture), and later on the 'locusts' are identified as people, specially 'crowned' (Nah. 3:17) and 'captains' (rulers), and at least 4 types of 'locusts' (Joe. 1:4, 2:25), devouring 4 different parts of the tree, (head, to foot) and are considered 'God's army' (Joe. 2:25) used to punish the rebellious, devouring the dead wood and branches (Rev. 9:4), as like a plague, as they were considered under the 'clean' category (Lev. 11:22; Deut. 28:38). The events of these 'locusts' have already happened, but in order to understand this, one needs to consider the beginning of the last Three Trumpets, called the "Woe" trumpets, as they are tied together (as like the 3 angels of Rev. 14:6-12), see Rev. 8:13. Once Rev. 9:1 is understood, in its timing, and the 7 trumpets and 7 Last plagues as a whole (tying into Joshua and Jericho, in Joshua 6), as with the Exodus from 'Egypt', and when it began for us (Christians), in the context of the 7 branch candlestick that is the Revelation, one cannot mistake the timing, nor the identification of them.
People that 'read into' the text things like 'helicopters', 'ufos', etc, simply have not read what scripture says of the symbols and realities themselves.
The Rev. 9 is also
not a reference to Islam, nor Muhammad, nor Ottoman empire. Those who teach those things, also 'read into' the text that which is not there, not following the command in scripture, to go line upon line, precept upon precept, not going from natural to spiritual.
I have a many page study on Rev. 9 (not all complete, but useful), and if any desire we can look at just the first verse of Rev. 9 (beginning with Rev. 8:13).