Ok so cool we finaly got some basic renderings of how the propeller hub assembly
mite look like in its manufactureing and testing stages. We kind are looking at a constant speed type that can be feathered
for reentry back into the atmosphere and possibly save the propeller from having to be replaced after it comes into the spaceport
after being in orbit. Remember the reason why we have the aircraft landing at a spaceport is so you can cost effective its
engineering design.
A large crane moves on its tracks to lift the blade and assemble it to the hub on a running
tower. The 3450 to 5000 rpms that turn the propeller on a normal size ME 109 or BF-109 if it will work on a giant size must
be able to stand up to the tremendious loads and torque from its spinning propeller. Also the rest of the airframe must be
strucuraly sound enouph to hold up to the running of the large prop.
After the aircraft reenters the atmosphere and returns for a landing it may be that after
each flight the propeller must be changed.We hope that the TBO(time before overhaul) lasts for several operations of reentry
into the atmosphere as it will enhance the turn around of maintenance and the cost platform of each mission but never the
less it can operate with the changing of the propeller after each reentry.
One of the things about manufacturing the airframe is that in jacking the aircraft or
lifting it up to perform routine maintenance there must be what they call,"Hard Points", designed into the engineering sphere
of the airframe.
How this is done relates greatly to what the airframe is structuraly made of wheather
it be made of titanitium or steel or aluminium and composites. The airframe must be strong enouph and light enouph to swing
the large weight and torque of the propeller and have enouph useful load capabitlities to carry full propellants and fuel
for orbital entry from the atmosphere and take off from a runway.
These crude renderings of a manufacturing facilitiy and testing channel hanger for
the big propeller agency show the use of cranes in the manipulation of the propeller blades to the propeller hub assembly
and the testing station with a test powerplant and driveshaft instalation for run ups to full speed RPM's.