Blenheim problems

[jf1981]

Hi,

I have corrected from IAS to TAS, however the best aiming is obtained with a speed close from IAS entered on the system.
When using TAS, it was much before the target. Using IAS, approximately on the target.
For example, at 10'000 ft 210 IAS (that is boost 4), setting TAS 240/250, far before the target, set TAS 210, close from the target.

Turns out the best setting I've found is aircraft at 200 IAS, 200 entered at the TAS dial. Up t 10 kft looks good, above that, very dofficult to see the targets coming in anyway, another type of difficulty.