Re: Trident Plane Outsped Sabre Fighter!!!
Posted: 26 Apr 2016, 16:59
Hi guys , to complement Peter on Gib notes .
Gib used to be RAF North Point Gibralter ; and on my last visit in 1988 the ATC was provided by the RAF . It may well have had Air Defence Radar , as well as ATC radar to provide the Surveillance Radar Approaches [ SRA ] .
Certainly the Trident or Boeings did /does not have Radar warning receivers [ RWRs ] . The weather radar can pick up other a/c , but only 40 degrees or so either side of the nose and only if you know where to look or can see the other a/c .
Gib is a restricted airport . Used to require a Captain to visit before operating [ probably still does ] Shetland , the Old Hong Kong [ Kai Tak ], Moscow , were the same and Funchal [ before rwy lengthening ] required 2 visits !
Gib’s problems are not high ground , but the adverse winds generated by the Rock and the need [ especially Rwy 09 ] not to infringe Spanish airspace .
Wind given to approaching a/c are : Touchdown , Midpoint , and Rollout winds . Any one of which could be outside limits .
The limits being quite conservative compared to normal airport use ; but at Gib are necessary because of the extreme turbulence generated by the Rock . Beyond a/c – pilot capability in some cases .
Routes from the UK are over Spain to approx Malaga , and then freecall Gib . No handover from Spanish ATC [ politics ] .
Diversions in my day were not back to Malaga , but outside Spain to Tangiers or so . Which put fuel requirements up .
Tridents were performance limited both in landing and take off at Gib . 737-200s were much better in both regards .
A Skipper on the Trident once delayed take off until a passing ship had moved from our take off path . ATC queried this ; the reply being ‘’ Have you seen this thing with an engine out ? We’d hit the superstructure ‘’ .
ATC ,’’ but he’s 5 miles away ‘’’…… Us ……’’ Yes that’s what we mean ‘’ .
Speed points ..... the early Tridents 1s could do 400kts IAS [ so I’m told ] . In my time they were restricted to 365 in common with the T2s . The T3s limit being 350kts IAS . The mach limit , maybe M.89 [ brain fade ] , but I’ve certainly seen M.92 and rising ‘til we pulled the airbrakes out .
737s Mach limits much lower [ less wing sweepback ] but VMO 367kts IAS [ only at a certain height , and less below and above ] .
Scrambling an interceptor to climb up to 35000’ or so and overtake an airliner , will take time and distance . Better they start from in front of the airliner . Back in 1998 , a weather divert around some thunderstorms , Northbound over the Sudan took us 150 miles off track and out of communications with Khartoum [ always difficult ] . But we had the 26 year old Tristar thundering along at M.88 , and didn’t think that the Sudan Air Forces even older Mig 21s , would either get the message in time , be serviceable , not be on duty down in the troublesome South , to be able to launch and overtake us before we reached Egypt .
Hope that this helps back up Peter Mac .
rgds dave f .
Gib used to be RAF North Point Gibralter ; and on my last visit in 1988 the ATC was provided by the RAF . It may well have had Air Defence Radar , as well as ATC radar to provide the Surveillance Radar Approaches [ SRA ] .
Certainly the Trident or Boeings did /does not have Radar warning receivers [ RWRs ] . The weather radar can pick up other a/c , but only 40 degrees or so either side of the nose and only if you know where to look or can see the other a/c .
Gib is a restricted airport . Used to require a Captain to visit before operating [ probably still does ] Shetland , the Old Hong Kong [ Kai Tak ], Moscow , were the same and Funchal [ before rwy lengthening ] required 2 visits !
Gib’s problems are not high ground , but the adverse winds generated by the Rock and the need [ especially Rwy 09 ] not to infringe Spanish airspace .
Wind given to approaching a/c are : Touchdown , Midpoint , and Rollout winds . Any one of which could be outside limits .
The limits being quite conservative compared to normal airport use ; but at Gib are necessary because of the extreme turbulence generated by the Rock . Beyond a/c – pilot capability in some cases .
Routes from the UK are over Spain to approx Malaga , and then freecall Gib . No handover from Spanish ATC [ politics ] .
Diversions in my day were not back to Malaga , but outside Spain to Tangiers or so . Which put fuel requirements up .
Tridents were performance limited both in landing and take off at Gib . 737-200s were much better in both regards .
A Skipper on the Trident once delayed take off until a passing ship had moved from our take off path . ATC queried this ; the reply being ‘’ Have you seen this thing with an engine out ? We’d hit the superstructure ‘’ .
ATC ,’’ but he’s 5 miles away ‘’’…… Us ……’’ Yes that’s what we mean ‘’ .
Speed points ..... the early Tridents 1s could do 400kts IAS [ so I’m told ] . In my time they were restricted to 365 in common with the T2s . The T3s limit being 350kts IAS . The mach limit , maybe M.89 [ brain fade ] , but I’ve certainly seen M.92 and rising ‘til we pulled the airbrakes out .
737s Mach limits much lower [ less wing sweepback ] but VMO 367kts IAS [ only at a certain height , and less below and above ] .
Scrambling an interceptor to climb up to 35000’ or so and overtake an airliner , will take time and distance . Better they start from in front of the airliner . Back in 1998 , a weather divert around some thunderstorms , Northbound over the Sudan took us 150 miles off track and out of communications with Khartoum [ always difficult ] . But we had the 26 year old Tristar thundering along at M.88 , and didn’t think that the Sudan Air Forces even older Mig 21s , would either get the message in time , be serviceable , not be on duty down in the troublesome South , to be able to launch and overtake us before we reached Egypt .
Hope that this helps back up Peter Mac .
rgds dave f .