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RAF / RN Chinagraph Pencils (Cold War era) for Kneeboards

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RAF / RN Chinagraph Pencils (Cold War era) for Kneeboards

Old 27th Sep 2018, 08:27
  #101 (permalink)  
 
Join Date: Jun 2009
Location: South East Asia
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We're up to Post #100 and still no one has mentioned how absolutely essential a chinagraph pencil was when performing tracking of helicopter main rotor blades after maintenance. Each blade tip was liberally marked with a different colour chinagraph, then with the rotors turning at normal RPM, a "tracking flag" was slowly - very slowly - moved to gently "kiss" each blade tip in turn. This left a coloured mark on the flag corresponding to the vertical position of each blade relative to the others. From this adjustments could be made to get the blades "in-track" which helped, but didn't guarantee, that the helicopter would be smooth in flight.
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Old 27th Sep 2018, 09:02
  #102 (permalink)  
 
Join Date: Aug 2005
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Remember the method well, it was still more reliable than the infernal rotor tune box that followed! Any one remember BIM’s as well?
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Old 27th Sep 2018, 09:06
  #103 (permalink)  
 
Join Date: Mar 2010
Location: Often in Jersey, but mainly in the past.
Age: 75
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Originally Posted by airpolice View Post
About a year later I was posted to Northern and didn't need one as the T82 tracked with store dots, then I went to Border and had to learn to write sideways, from both sides, on a huge flat top display. Writing backwards was easy, and I never had to do it apart from at Shawbury, but sideways...
So where at NRD did you record all the details of the tracks you were controlling? On a flight strip?

At ERD we used the on-screen chinagraph cross. C/s top left, heading bottom left, FL bottom right and Type top right, with store dot number at the top of the cross. Or something like that. The Assistant, IIRC, kept track [in parallel] on a flight strip with the same data, for subsequent filing.
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Old 27th Sep 2018, 09:48
  #104 (permalink)  

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Originally Posted by Q-SKI View Post
Remember the method well, it was still more reliable than the infernal rotor tune box that followed! Any one remember BIMís as well?
I remember getting many false "BIM" captions - and one very notable one which wasn't false...we were extremely lucky that blade didn't fracture - only the front part of the main D spar was left and "on it's way"; everything else aft of that was cracked through.
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Old 28th Sep 2018, 06:11
  #105 (permalink)  
 
Join Date: Oct 2008
Location: Dead Dog Land
Age: 73
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Originally Posted by Saint Jack View Post
We're up to Post #100 and still no one has mentioned how absolutely essential a chinagraph pencil was when performing tracking of helicopter main rotor blades after maintenance. Each blade tip was liberally marked with a different colour chinagraph, then with the rotors turning at normal RPM, a "tracking flag" was slowly - very slowly - moved to gently "kiss" each blade tip in turn. This left a coloured mark on the flag corresponding to the vertical position of each blade relative to the others. From this adjustments could be made to get the blades "in-track" which helped, but didn't guarantee, that the helicopter would be smooth in flight.
Also extremely good for hiding minor scratches on your car, the ones that won't polish out.
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Old 28th Sep 2018, 07:22
  #106 (permalink)  
 
Join Date: Aug 1999
Location: Gold Coast, Australia
Age: 71
Posts: 4,138
Only one chinagraph seems to have survived our last house move; hopefully 819 donít want their knee board back!

North Sea hacks may remember the deviousness of having multiple rigs with the same NDB frequency, and also the Decca chain fixes?
Attached Images
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Old 14th Nov 2018, 16:08
  #107 (permalink)  
Thread Starter
 
Join Date: Oct 2012
Location: Leicestershire, UK
Posts: 41
Many thanks to all who have helped contribute to this thread, and the kind donations of pencils and refill leads!

I have now updated the web page on them, please see here: British Aircrew Chinagraph Pencils | ScottBouch

Any errors in the web page, please do let me know so I can improve it!

Cheers, Scott.
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Old 14th Nov 2018, 17:14
  #108 (permalink)  
 
Join Date: Mar 2010
Location: Often in Jersey, but mainly in the past.
Age: 75
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Glad to have helped with leads.

Everyone should have a hobby
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Old 15th Nov 2018, 07:59
  #109 (permalink)  
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Join Date: Oct 2012
Location: Leicestershire, UK
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Haha, this is just one of far too many!
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