[Crumpp]

And how reliable are drawings by Mtt. anyway?

Like most firms the reports are most likely extremely reliable for the purposes intended by the reports author. The discrepancy comes when one tries to take that information out of context and apply it to something never intended.

The key is having the entire report as well as the context of its development. Good example of that is our engine restoration has dictated we marry both physical and documentary evidence to build a case for the FAA that our engine will be safe to run using the latest manufacturer’s recommendations available.

But what was it for then?

Without the entire report we would only be venturing a guess. However several distinct possibilities exist including the investigation of a q-limit raise in the design, the reduction or elimination of Dutch roll, or a decrease in the directional stability stick force per G. These are by no means the only explanation possible.

All possibilities will start out on the slide rule with supporting documents illustrating the design changes.

All the best,

Crumpp