Milt
8th Mar 2004, 13:12
Is there still such a procedure as a "Hot Relight" for jet engines at high altitude?
In my time at Boscombe Down in the late 50s during the hey day of the V Bombers we investigated the relight capabilities of jet engines at high altitude.
Soon found that if one could initiate a relight within 10 seconds of a flame out or shut down and whilst it was still fairly hot, reliable light ups could be achieved. After 10 seconds or so it would require a descent to medium altitude to achieve a relight.
The 201, or were they 102s, Olympus engines in the later Vulcans were superb. Had one up over 50,000+ and had no relight balks out to 10 seconds. What's more those engines would then slam accel from less than idle. Most impressive and Bristol received "a great credit to the manufacturer." bouchet.
We coined the phrase "Hot Relight" having the 10 second time limit.
Are "Hot Relights" still in the SOPs?
In my time at Boscombe Down in the late 50s during the hey day of the V Bombers we investigated the relight capabilities of jet engines at high altitude.
Soon found that if one could initiate a relight within 10 seconds of a flame out or shut down and whilst it was still fairly hot, reliable light ups could be achieved. After 10 seconds or so it would require a descent to medium altitude to achieve a relight.
The 201, or were they 102s, Olympus engines in the later Vulcans were superb. Had one up over 50,000+ and had no relight balks out to 10 seconds. What's more those engines would then slam accel from less than idle. Most impressive and Bristol received "a great credit to the manufacturer." bouchet.
We coined the phrase "Hot Relight" having the 10 second time limit.
Are "Hot Relights" still in the SOPs?