Hi,
Page 19 of the detailed report shows the right aileron on a mass scale reading
.415 kg ( approx. 1 pound ) under balanced at the weight position ( 145 mm
chord length).That's a lot ! Must have been under balanced from day 1.
(.415 kg X 145mm = 60 kg/mm)
The balancing weight is a T shaped tube ( probably filled with lead) and was
still attached to the aileron spar.
Sad but preventable mistake.
I'm sure all KR pilots will breath easier knowing that the wing spar did not
fail without serious overload by flutter. I know I will .
And I check the balance weights for security at every walk around before flight.
Cheers
Chris GardinerKR2S CGKRZ 285 hours
.
On Monday, May 16, 2022, 09:45:32 a.m. EDT, Larry via KRnet
<[email protected]> wrote:
On 5/16/2022 8:07 AM, Mark Langford wrote:
>
> I think what they are saying that at the original inspection, the
> balance weights are inspected and the aileron balance is verified, but
> subsequent inspections ("annuals" I presume) don't go into that kind
> of detail to verify that they are still capable of counterbalancing
> the ailerons.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
They gave a specific number ( 60 kilograms per millimetre (kg/mm)
residual moment.). Was the wreckage in good enough condition to
determine that and how exactly would they do that? If they would state
"the aileron was under balanced by 8 oz. for example I could comprehend
that but their numbers mean nothing to me.
Larry Flesner
P.S. My aileron were not checked on original inspection. I built them
with a slight "over-balance" assuming that "balanced" is ideal,
"over-balanced" second best, and "under-balanced" a no-no if required.
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