Navigational Computer – a mk111h*.

[furkin]

Hi Guys,

My friend has come across her deceased fathers Navigational Computer – a mk111h*. She asked me to ‘look into it for her’.
I have no idea where to start, except on here.
A few markings are:
FRONT:: AM P > L.N.P > LNP/R/3/53 > Ref. No. 6B/250
REAR:: I.C.A.N calibration.

1/ We’d like to know more about it – for her fathers point
2/ I’m sure she’d like an idea of what it’s worth – at the right auction.
So far, whilst finding a few samples on the internet, I haven’t come up with one with Mk111h*.

Anyone help please ?

[kradman]

The ref No 6B/250 would mean it was used by the RAF most likely in a aircraft

[furkin]

Thanks kradman,
Her father certainly was a pilot.
Were these things used in other things, like ships, tanks etc etc ?
I assumed they were only used in planes.

[big ned]

It's used specifically for aircraft, and computes a myriad of different problems such as the effect of winds on the aircrafts track and ground speed, as well as fuel consumption/use that is also affected by the winds speed and distance to be travelled/ time taken. It can also be used to plot interception problems, in fact almost any mathematical problem that may be encountered in flight.

That's a very basic synopsis, for the full skinny you can read this, but unless your really keen, or planning a Flight 19 type exercise, but hoping for a better outcome, it's pretty dry stuff.

WW2 RAF/Commonwealth Air Forces Collector/Reenactor Forum: Navigational Computor Mk.III H

Value is minimal, around £20 tops for one in good condition and no damage.

Regards, Ned.

[Jerry B]

an old thread I know but I was given one of these recently. The thread starter marked 6b/250 with ICAN means it is post war.

for such a common device there is little about them on the net it seems. this type with the four feet is for the navigator, there was a version with a strap for pilots