I read recently that a KR2 pilot was worried about "stuffing a 2nd std pilots 
in a KR."

There is no need to worry about stuffing any payload onboard a KR2 if the 
aircraft remains within the C of G range. That is what the C of G range is for 
after all.

In the UK we did extensive tests of aircraft stability at the aft C of G 
limits. All the KR2 aircraft involved became neutrally stable at the 6 inch aft 
point. Beyond that the aircraft became divergent and it was decided not to 
continue the flight program of deep stalls, (Stall with full backstick applied 
to see if aileron control was still possible) and other manoeuvres in that 
divergent state. From the conclusion of these tests, It was then decided by the 
UK CAA or LAA to remove the last two inches of range of C of G from all KR2's 
in the UK. I totally agreed with this stance, having tried flying a KR2 on the 
6 inch aft point. It was not fun.

So if you have an 0-200 or Corvair or something similarly heavy up front and 
your C of G range works out ok and permits your flight and you don't mind 
flying above the original 900lb MAUW allowed, then do not worry, the aircraft 
will fly just fine. Top pilots with bigger balls than us, flew the C of G and 
weight envelopes so that we don't have to worry.

You only have to worry if you decide to load up and go fly a KR2 without a clue 
what the aircraft C of G actually is. Then you and everyone at the airfield 
definitely should be worried.

Of course, those with fuel tanks above your feet, as the fuel burns off the C 
of G moves further aft, so you might take off ok, but the aircraft will become 
more divergent during the flight. All food for thought...

CH.
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