CV990 From , joined Dec 1969, posts, RR:
Reply 1, posted (14 years 2 months 3 weeks 5 days 13 hours ago) and read 1005 times:
In my personal opinion these airliners will not have much life left. The 707/720 came in an era where fuel was no problem and these first generation jets where fuel-burners, in a few words true camels with fuel in is back. Now this doesn't mean that they can be realiable but they are beeing overpassed by bigger airplanes that consume much less fuel then these. Even in cargo operations we start to see first generation wide bodies like the A300, B. 757 and B. 767-200 ready to make money. My personal feeling is that unfortunetly a few more years we will stop seeing comercial 707/720 flying, but relax we still have military 707's and their military version KC-135 flying around for many years. Don't forget for example that USAF has more than 500 KC-135B's ( that where re-engined with ex: airliners B.707/720's and their tails also replace by ex: 707/720 airliners ) and KC-135R ( these a much more complex program that replace the old turbojet water injection by CFM-56's engines ) and also we have the E-3's Sentries from USAF/NATO/RAF/Saudi AF/L'Armee de L'Air, we still have the E-8 TACAMOS from USNavy, the EC-18's and some tankers from other air forces, these true 707's modified to tankers like Italian Air Force with 4 ex: TAP 707's, Spanish Air Force also with some ex: TWA 707's, Brazilian Air Force with some ex: VARIG 707's, Venezuela, Chile. So there some plenty 707 or 707 variations still flying around!!!
Fanofjets From United States of America, joined Apr 2000, 2029 posts, RR: 3
Reply 2, posted (14 years 2 months 3 weeks 4 days 17 hours ago) and read 971 times:
Military and government (VIP) 707s have generally been well maintained, and many have "young" airframes (in terms of hours flown. However, I am sad to say (as I have flown on many of these splendid airplanes in my childhood), their commercial prospects are very dim.
Although one company introduced a modification incorporating JT-8D turbofans and winglets, the aforementioned examples would be the only candidates. The commercial aircraft have exceedingly high hours on their airframes, in many cases well beyond their design life of 20 years/60,000 hours. There are plenty of 727s and first-generation widebodies to haul freight, so even the most cash-strapped start-up operation will have much more economical alternatives from which to choose.
Now if some of those old birds could be preserved...
The aeroplane has unveiled for us the true face of the earth. -Antoine de Saint-Exupery