There engines were originally used on B-52, Boeing 707 and KC135s
2006-07-10 03:24:16 · 3 answers · asked by Slow__Rain 1 in Cars & Transportation ➔ Aircraft
Subject to local noise restriction, yes, they are allowed. They aren't used because modern high-bypass turbofans (the fat engines you see more commonly) are more efficient. Those older pure jet engines are used on infrequently used cargo planes (capital versus operating cost trade-off) and when high thrust is need on take-off (I've been on pure-jet 737-200s out of Dutch Harbor Alaska which is a REALLY short runway).
-David in Alaska
2006-07-10 07:45:21 · answer #1 · answered by David in Kenai 6 · 0⤊ 0⤋
I am not aware that they have been disallowed, but the reason you do not see many JT3 engines is because of their inefficiency. They burn much more fuel than their modern competitors and they are often not quiet enough to qualify for the various noise restrictions at many airports. However, if you have someone willing to fork over lots of money and be severly restricted in where they go, there's not an issue using JT3s.
2006-07-10 13:06:45 · answer #2 · answered by dannyj7 2 · 0⤊ 0⤋
Yes, if you look at the tail number it starts with an "N". That signifyies that its registered in the US. The plane that you see here probably had a hush kit installed. So to answer your question, yes these engines are still widely used.
2006-07-10 12:16:35 · answer #3 · answered by j3cubfan2003 2 · 0⤊ 0⤋