To add a touch of meat to the bones of Genghis'story there... and before our Lightning Mate with his 1850 hours pops along...
Part Throttle Reheat was added to the Jag to try and smmoth out the thrust difference between Max Dry power and Min Reheat.
This became apparent when the Mighty Shaguar was attempting to refuel. When the probe was selected out, as it sat directly in front of the right hand intake, it was necessary to throttle the engine back to idle to prevent the engine from ingesting any detritus should there be a 'spokes' event. That is to say that the reciever missed the refuellers basket and broke one or more of the spokes with the refuel probe.
Part Throttle Reheat (PTR) over rode the usual speed switches to allow the engine RPM to operate in a part of the usual dry range whilst reheat was still engaged, to bridge the gap between dry power and reheat...
I had many a happy year with the Jaguar, and if you pull up a sandbag before LM gets here, I'll share a story.. ;-D
July 3rd 1999, and the SAOEU as was had spent 4 months in the USA doing amongst other things Maverick trials on Harrier for Kosovo...
..Everything else had gone and we had just seen off the two Jaguars (XX723 and XX725) and piled onto the Herc for the trip home, 3 out of 4 engines had started and all of a sudden they all shut downand the call was made for everyone to disembark. One of them (can't remember which) had suffered from a major surge after take off and had shut the engine down as a precaution. They were on their way back...
After landing, we helped out a very white and sweaty pilot who had just had to inform Nellis tower that should an overshoot be required, he would be having to eject, and had only managed to maintain the glideslope, late morning in the middle of July on one engine in Min Reheat...
Certainly gave me a new level of respect for the aircrew......as well as an extra week in Vegas over the Independance holiday... ;-D