: "I believe some 727s were made JATO equipped, for take off's off of short runways."
I don't know about any 727s but I have seen Overseas National Airlines DC-9-33F with JATO.
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Photo © Steve Williams
I can't tell whether this tail number had it or not. They were mounted in the wing fillet fairing. Four or six bottles, I don't remember. They had a shelf-life and were fired on a normal takeoff when they expired. A good friend of mine has been the copilot on such a firing.
The scariest JATO installation I've ever seen was on a taildragger twin Beech which had one in the back end of each nacelle. Imagine if only one fired! You'd be in for one wild ride, especially if it was on the "good" engine side.
A couple of years ago "Fat Albert" performing at the Reno Air Races, had a bottle fire off, then detach from the airplane. Luckily it was on the non-specator side and only started a brushfire.
Happiness is not seeing another trite Ste. Maarten photo all week long.