Military Aviation A forum for the professionals who fly military hardware. Also for the backroom boys and girls who support the flying and maintain the equipment, and without whom nothing would ever leave the ground. All armies, navies and air forces of the world equally welcome here.

WIWOL Wednesday

Old 6th Jun 2018, 20:07
  #161 (permalink)  
Join Date: Jul 2008
Location: UK
Posts: 27

Yes, precisely the same method for tgt height calc (acknowledging beam width error, which also depended upon gain/highlighting technique) plus use of 1-in-60 to calculate lateral displacement. Then, judicious use of ideal keys for 180/150/120/90 intercepts using change of displacement (in nm) over 5nm to identify Track Crossing Angle: constant displacement = 180; 1-1.5nm = 150; 2-2.5nm = 120; 3-3.5nm = 90. Speed ratio presumed 1.1 to 1 at start then recalculated by reference to tendency towards collision angle as intercept progressed. Fun in the dark, especially at low level, while calculating altimeter pressure error correction and watching VSI like a radalt in the T5 for check-rides!

All became far simpler with change to display of target aspect (in newer, track while scan, weapon systems - it was eventually changed, for example, in Tornado F3, which originally used TCA). Use same 1-in-60 rule calculation for lateral separation in thousands of feet, then use aspect's relationship with collision angles to increase (lag) or decrease (lead) tgt aspect and lat sep, as required, before turning to reciprocal (if a stern intercept). Very easy on-screen visual exercise with minimal calculation. Most use 40,000ft lat sep at altitude (20,000ft at lower levels) for controlled 45 AOB final turn for, say, tanker join or stern VID.


Displacement change over 5nm was always the clue (if you'd bothered to calculate it in the first place)!


I stand to be corrected on both old and new info, since it's been quite a while!

There was always loads of discussion and banter in the old days about which platform had the highest workload, but it was a pretty tough apprenticeship - in every sense of the word.
sarn1e is offline  
Old 2nd Jul 2018, 18:56
  #162 (permalink)  
Join Date: Oct 1998
Location: U.K.
Posts: 41
sarn 1e. Thank you for that comprehensive reply. We have come a long way since those days. I have flown with FOs, victims of an education establishment that abandoned the teaching of the times table, who seem to struggle if they can't put the numbers in a calculator. AI in the Lightning would probably have been beyond them. Best wishes.
hawkeye is offline  
Old 2nd Jul 2018, 19:40
  #163 (permalink)  
Join Date: Sep 2004
Location: Berkshire
Posts: 1,286
Surprised to see no post a couple of days ago on 30th June.......marking 30 years since the final flights of a Lightning in RAF service.
GeeRam is offline  
Old 2nd Jul 2018, 19:41
  #164 (permalink)  
Join Date: Mar 2010
Location: Often in Jersey, but mainly in the past.
Age: 76
Posts: 6,218
Originally Posted by GeeRam View Post
Surprised to see no post a couple of days ago on 30th June.......marking 30 years since the final flights of a Lightning in RAF service.
Nostalgia isn't what it used to be ... sorry!
MPN11 is offline  
Old 4th Aug 2018, 14:38
  #165 (permalink)  
Join Date: Dec 2002
Location: UK
Posts: 2,140
4 Aug

safetypee is online now  
Old 26th Sep 2018, 02:29
  #166 (permalink)  
Join Date: Sep 2004
Location: North Pole
Posts: 957
Well it’s Wednesday so just a reminder guys of the annual get together in London a week tomorrow! Details to be found on Ed’s site! Be there or be square!����������
newt is offline  
Old 11th Mar 2019, 21:07
  #167 (permalink)  
Join Date: Mar 2004
Location: Turks and Cacos
Posts: 314
Posted from the Binbrook Facebook page:

I would like to inform all of the recent passing of Ret’d Air Commodore David Cowley on the 7th of March.
According to his Log Book, David flew prop aircraft before moving onto Vampires, Hunters and, eventually Lightnings.He was OC 11 Squadron at from 1971 to 1974 and became Binbrook Station Commander sometime between 1980 to 1982. He eventually reached the rank of Air Commodore before retirement.
Funeral arrangements on the 11 Squadron Association Website once further details become available.
On_The_Top_Bunk is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.