Fuel gauges

By chance, some time ago I knocked up this list trying to sort them all out. I do not claim it as authoritative but if anybody can add anything, please post.

The AP for the D4 version states; Fuselage, Octagon and base 2450 lbs and Desk complete 600 lbs.

Whilst most/many were originally luminous it seems that later there were non-luminous, ie; flourescent versions of the same instruments produced with later reference numbers. However, beware, there are exceptions where supposedly flourescent instruments have proved to pose a radiation hazard, and vice versa. Obviously some aircraft were without suitable UV cockpit lighting.

Here is a schematic of the Mk IV

The Mk 46 was green or red:-

At release the bomb has the same forward velocity as the aircraft but the the bomb’s forward velocity will reduce so that, instead of staying vertically below the aircraft (as it would do if the bomb had no drag and the aircraft stayed on a constant heading), its forward distance flown before hitting the ground will be less. And a bit too complex to consider is the effect of a cross wind on the track of the bomb rather than the heading of the aircraft AND the increasing amount of effect that cross wind will have on the bomb! One hopes that the computor took that into account since it was set into the computor by the bombaimer but was the forecast wind over target the same as the actual wind.

No wonder bombing accuracy was not generally all that good!

I’m not clear on it either!
see https://forum.keypublishing.com/showthread.php?136176-Iron-Bombs-Time-of-Fall&p=2251953&highlight=#post2251953

Indicator is/was a Tacho Indicator Mk 10A 6A/2801 now 6A/4676148.