On 7/20/2022 6:44 AM, colin hales via KRnet wrote:
Build them right and light and build in the correct empty C of G
position and there are no issues with the plane at all. Only issues
you want to dream up.
There is nothing wrong with the plane here. Only if a pilot doesn't fly
within the well defined C of G range. You would have to seriously fail
to observe and comply with the actual C of G position of the aircraft to
make the aircraft dangerous.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Colin,
If every KR and every flight were made as you suggest, and apparently
do, this subject wouldn't be an issue that is "dreamed up". Either
through misunderstanding or complacency it simply is happening.
Builders and fliers on the net would be better served if you would use
your knowledge and expertise to educate builders and fliers on how to
avoid the problem rather then belittle them for their mistakes. That
might keep stories like the following from happening. "At the mention
of putting 46 pounds ballast in the engine compartment to get rid of the
tail heavy and unstable condition, I have had several inquiries". When
builders add wing tanks between the spars and add 12 gallon each side
they need to understand the consequences of that change and realize it
might well be a safety issue later on.
The KR2, because of it's size, two 170 pound people can easily add up to
50% or more of the airplane empty weight and become a major issue for
flight if other factors are not considered. In the interest of safety
and to help your fellow builders, it would be interesting to know the
following:
Is your KR plans built as a 2 and not a 2S ?
What is the empty weight of your KR and what is the empty CG location
(of MAC)?
What engine did you use and did you compute it's location to adjust the
empty CG?
Where are your fuel tanks located and what is their volume?
What is your weight, and the weight of your usual passenger?
Where is your CG located, in respect to MAC, with you and a passenger
and how much does it change from full to empty fuel.
The "issue" you claim is "dreamed up" is HAPPENING real world. Let's
use our collective expertise and experience to help our fellow builders
/ fliers from making it an "issue" with their project.
In the spirit of safety,
Larry Flesner
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