• ARRSE have partnered with Armadillo Merino to bring you an ARRSE exclusive, generous discount offer on their full price range.
    To keep you warm with the best of Merino gear, visit www.armadillomerino.co.uk and use the code: NEWARRSE40 at the checkout to get 40% off!
    This superb deal has been generously offered to us by Armadillo Merino and is valid until midnight on the the 28th of February.

Edinburgh one oclock gun.

#1
Okay don't shoot me down here.

I was really bored today at work and using a combination of satelite photos and tourist websites thought it would be fun to try and find out where/what the one o'clock gun is aimed at. Got all the data (assuming initial trajectory is 15 deg, edinburgh castle is roughly 85m above sea level and a light gun is used.) but screwed up majorly somewhere as got range to be 26.4 km. Not actually that good at using microsoft excel though - can anyone put me out of my misery/point me in the right direction?
 
#3
Not sure about that. I'm really only 14 years old and desparately trying to cheat on my maths homework. What's a whore anyway? Is it a type of ice cream? Any chance you could explain...
 
#6
Actually it's a BLANK charge so nothing comes out of the end. Think we'd have had some negative feedback by now should we have been lobbing rounds into Edinburgh. Light Gun fires on max at just over 17k's (10.3 miles) so, should you inadvertantly load with Ch Super, get data from some civvy who happens to have FT's with him and presuming AMC isn't in force you could quite happily take out gardens in Bonnyrigg, Dalkeith, Cockenzie and Port Seton and make a hell of a mess on the Forth Road Bridge. I thank you!
 
#7
Where is it aimed at though? 6 fig grid ref pref...

Know the angle of trajectory, the location of the gun and its bearing (assuming the castle is around 85 m above edinburgh). Also know muzzle velocity, wieght of projectile etc.

Did massively long calc taking into account wind resistance (assuming zero wind speed and air temp/pressure has negligable effect.) came to around 26.4 km, also did really simple calc which came to just over 25km range. Surely firing tables are just for convenience and it must be really easy to calculate this without.. (just had another moment of boredom,) apart from a life what am I missing here.... ?
 
#8
tedrogers said:
Surely firing tables are just for convenience and it must be really easy to calculate this without...
I shudder to think what an entire generation of terribly clever people at Eskingmeals would think of this statment, but there you go.

The max range of the Lt Gun is 17200 metres. You now need to provide the bearing the gun is pointing into (preferably in mils - simply multiply your degrees by 17.7) and what elevation (QE) it is at (i.e. what amount of 'up'). Someone could then very easily work out (using Firing Tables) where the gun was pointed at - to within a few hundred metres or so, anyway.

Which is pretty much all we do as it is, come to think of it.
 

Auld-Yin

ADC
Kit Reviewer
Book Reviewer
Reviews Editor
#10
Darth_Doctrinus said:
tedrogers said:
Surely firing tables are just for convenience and it must be really easy to calculate this without...
I shudder to think what an entire generation of terribly clever people at Eskingmeals would think of this statment, but there you go.

The max range of the Lt Gun is 17200 metres. You now need to provide the bearing the gun is pointing into (preferably in mils - simply multiply your degrees by 17.7) and what elevation (QE) it is at (i.e. what amount of 'up'). Someone could then very easily work out (using Firing Tables) where the gun was pointed at - to within a few hundred metres or so, anyway.

Which is pretty much all we do as it is, come to think of it.
And then drop short 8O

Oooooops :wink:
 
#12
There is nothing to be ashamed of if you don't know.

The simple equation I used was: range = ((vsquared sin 2 theta)/2g)[1+(1+(2gh)/(vsquared sin squared theta))to the power of 0.5]

where v=initial velocity of projectile, theta is angle of trajectory g = 9.81m/s2 and h is the hieght of edinburgh castle.

Did a much longer one too, but it didn't work either and think it might tax my brain too much writing it out.
 
#14
I love how many comments along the lines of 'drop short' we get from complete wasters. If 'Auld Yin' has ever been remotely near live OS, I'm a Frenchman. Cue really amusing rejoinder from the 'man' himself.

If you aren't going to add value, please don't bother lurking around the more esoteric parts of ARRSE, and keep your inane blithering to the NAAFI with all the other walts and time wasters.

Cheers.

And then drop short :ironic smiley:
That's exactly what I was getting at. Do I need to provide a powerpoint presentation next time? Wake up.
 
#16
Master-Sniper said:
Esoteric ........ so the gunners are into Greek fun, what a shock
Eh?

es·o·ter·ic
adj.

  • 1. Intended for or understood by only a particular group: an esoteric cult.
    2. Of or relating to that which is known by a restricted number of people.
    3. Confined to a small group: esoteric interests.
    4. Not publicly disclosed; confidential.
I can see how you might think there is some sort of tenuous (definition: click here) link between the two.

What is 'greek fun' by the way? Making unpleasantly thick yoghurts without fruit?
 

Auld-Yin

ADC
Kit Reviewer
Book Reviewer
Reviews Editor
#17
Darth_Doctrinus said:
I love how many comments along the lines of 'drop short' we get from complete wasters. If 'Auld Yin' has ever been remotely near live OS, I'm a Frenchman. Cue really amusing rejoinder from the 'man' himself.

If you aren't going to add value, please don't bother lurking around the more esoteric parts of ARRSE, and keep your inane blithering to the NAAFI with all the other walts and time wasters.

Cheers.

And then drop short :ironic smiley:
That's exactly what I was getting at. Do I need to provide a powerpoint presentation next time? Wake up.
Bon Jour Mon Amis(sp) vous ets a pal then!!!!!!!! (Franglais) :lol:
 

Auld-Yin

ADC
Kit Reviewer
Book Reviewer
Reviews Editor
#18
Darth_Doctrinus said:
Master-Sniper said:
Esoteric ........ so the gunners are into Greek fun, what a shock
Eh?

es·o·ter·ic
adj.

  • 1. Intended for or understood by only a particular group: an esoteric cult.
    2. Of or relating to that which is known by a restricted number of people.
    3. Confined to a small group: esoteric interests.
    4. Not publicly disclosed; confidential.
I can see how you might think there is some sort of tenuous (definition: click here) link between the two.

What is 'greek fun' by the way? Making unpleasantly thick yoghurts without fruit?
I think mayhaps that Master Sniper was referring to the fact that es-o-ter-ic does have Greek roots, albeit from the languages from a bit further east. I don't think it is that 'tenuous'.
 
#19
Can't believe no one knows this.

All I wanted to do was start my own tourist attraction: Fence off a small part of leith and charge people admission to walk round a fake crater from the one time they accidently loaded a live shell. Would make an absolute killing (excuse the pun).
 
#20
Don't forget all the met, for all the layers the shell passes through. Just because the wind is east to west at ground level, doesn't mean it's the same all the way up AND don't forget equilibrium yaw :wink:
 

Latest Threads