All you guys building composite aircraft please scan the firewall building
instructions and send them to me. I sold my KIS cruiser kit
and the buyer got the KIS Cruiser builders manual.
Alex, this picture is the shock mount for the KIS Cruiser bolted to the
plywood sandwich KIS fire wall.
4 yards 50 inches wide from AC Spruce of carbon cloth 2 layers on each
side would cost $120. Much cheaper than just one laser cut steel tube :)
The hot tip is high compressive strength end grain balsa for core.
"End Grain Balsa structural core material provides exceptionally high
shear, tensile and compressive strengths, and stiffness for its weight.
Available as flat panels, as scored scrim backed drapable sheets and as
composite panels with a choice of skin configurations. Contact us for
information, specifications and pricing on products not listed below."
http://www.fiberglasssupply.**com/Product_Catalog/Core_**
Materials/core_materials.html<
http://www.fiberglasssupply.com/Product_Catalog/Core_Materials/core_materials.html
1/2 inch 24 by 48 is $33.
If you want something really bullet proof get the 3/4 inch for $35 :)
The strength goes up with the cube or the 4th power of the thickness.
It is kind of dumb to design a composite airplane with out a sandwich
firewall.
Paul Lamar
Fair enough, agreed. I think they will probably change what they doing
if you tell them a better way they should be doing it. If it makes the
design better then I think it should be done,
Alex
I don't want to rattle any cages. Ego is wide spread :)
I have to learn to keep my mouth shut some times. :)
In your case it is easy to retrofit.
I think 3 layers of carbon on the out side of the core and one on the
inside as the inside will be helped by the existing fiberglass.
It will surely strengthen it for crash purposes if God forbid that
happens. Jim Hall nearly lost his legs in a race car crash because the
structure was too weak for crashing.
It will strengthen the nose gear too. The weak link in nose gears is
usually the fire wall. That is true in C182's.
Paul Lamar