OMG!  Those look great!  Any plans on making blades for

pushers?  If

not, how difficult are the blades to make considering the builder

has

completed a composite Airframe?  It sounds like the financial side

has

been discussed a little, any guess on how much money I need to save

for

one of these bad boys?  Some of us have to think way ahead <grin>

Waiting in anticipation (hell I may buy two, one to hang on the

wall, a

thing of beauty for sure...)

Todd Carrico

****************************************************************************

****

Todd,.....Guess what???? You're not the only one interested in "Pusher

Blades"

there are a lot more of you out there, starting with "Yours

Truly"........The

way I look at it is: "No Pusher Blades, No Hub" :)

All joking aside, Perry will be constructing BOTH Tractor & Pusher

style

Blades, plus "custom tweaking"........Perry, please chime in on this

before I

get you into real trouble :-)
As far as $$$$, hang in there, we are practically ready for testing and

Paul

has graciously drafted Ed Anderson to do the flight testing ;-)

                                                     Butch

Hey... it is not like I am asking him to flight test them before we

torture

the hell out of those blades on the test stand :)

Paul Lamar

I'm awfully glad to hear that, Paul {:>).  Seriously, I know the plan has
been to thoroughly wring it out on the test stand much harder than what I
would (intentionally) expose it to on the aircraft and I have full
confidence that if it passes the test stand, the flight test will be
anticlimactic.  However,  from my perspective I can think of  a few

priority

requirements before flying with the LAEV  Most are obvious, but some of you
may think of  other pertinent factors that need attention.

    1.  The blades stay attached to the hub {:>) and maintain their
structural integrity (Example:  no sign of undue stress or wear at the hub
attachment point, no cracks in composite near hub, etc)

    2.  The blades have a minimum and maximum pitch mechanical stop such
that the electrical control can not force them past that point.  Minimum
point should ensure sufficient thrust for continued safe flight) (can't
recall if the hub design has such, Butch)

    3.  A failure mode analysis of what happens if an internal component
fails.  For example is there any failure mode whereby the two blades would
not be in pitch synchronization/alignment?  If the screw drive fails, does
the blade pitch lock at that setting?

    4.  It would be nice if while on the test stand, with the engine

running

that the ignition/fuel to one rotor be shut off, so that only one rotor if
providing power.  The engine really vibrates in that mode and could provide
unusual stresses to the prop and hub.  Not that I expect anything to

happen,

but would be nice to confirm that.

    Any suggestions as to what gyration parameters the prop/hub should be
subjected to while on the test stand?

Any other suggestions would be welcomed

Ed Anderson

Number 4. is a good idea. I'll see if I can arrange that Ed.

I'll let Butch handle the other numbers.

Paul Lamar

Joseph Berki wrote:

What about the stress on the blades while loading and  unloading as they
pass through the wing root area for pusher applications?  How does this
affect the rest of the system?
Joe Berki
Limo EZ
pusher--

Good point Joe and we won't be able to test that on the dyno.
I suggest a parachute :)

Paul Lamar

Parachuting out of a pusher presents some hazards not there in tractors.

Dick Gregory

Good point but if a blade comes off the engine might not be far behind.

Paul Lamar

 
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