Hawker 800XP Stall
 

Hi,

The manual of the Hawker 800XP states that one of the conditions for stall is that the ventral fuel tank must be empty. Does anyone have any knowledge of why that condition is there? I thought it might be for c.g. reasons but the c.g. needs to be within limits at all times and I assume that the aircraft has been tested at all c.g. conditions.

Ori

I do not have an answer for the XP.
AFAIR the basic 128-800 (no wing tip fins) did not have a restriction. This would support the logical view that operational limits have been tested.
However i do recall that limits on training stalls for some versions depending on avionic fit, which required the YD to be disconnected - no logical connection with wt or cg.

The BAe146/RJ has a restriction for training stalls which requires a test panel to be fitted with AoA displays for flight speeds less than stick shake.
This considered the risk in the manoeuvre due to increased exposure, opposed to the potential severity of outcome. The 146/RJ never encountered a deep tail-blanking stall in flight test, even though theory suggested otherwise; AFAIR the basic 125 was similar.

What's the shape of the tank and baffling configuration?

Thank you.