A mystery Item…….

A mystery calculator - Signed by Eric Meharry, Rueben's pilot.

A mystery calculator – Signed by Eric Meharry, Rueben’s pilot.

Some of the stuff that Martyn has passed on is too good, or in this case, too strange to just place in a page to be missed by blog visitors. Here is an example.

I must admit that I am not at all familiar with aircrew equipment and that someone will probably leave a message with a very simple answer (hopefully) about what this calculator was used for………

2 thoughts on “A mystery Item…….

  1. Brian Butler

    Hi,I too have not seen one of these calculators, but it looks to me, as the inscription reads, is a means of correcting ASI (airspeed indicator) readings for altitude. I would think that as altitude increases, and therefore pressure decreases, then the margin for error would increase. This would be essential for plotting DR (dead reckon) navigation courses

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  2. 75nzsquadron Post author

    Tanks for your input Brian – certainly the signature on it of Eric would support all of your observations. I am still excited that it is not something people have seen before

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