REFLECTOR: Metal prop on Velocity

[Andy Millin]

It was very disappointing to hear.
 
Velocity had flown with it for a while and it was looking very good.  I
believe they only tried it with one engine.  It was possible, if not
probable, that the prop might have worked in other combinations.
 
I believe it was run with the large Continental.  Scott Baker would be able
to say.
 
I have the 260HP Lycoming and would have liked to have seen it tested in
that configuration.
 
Andy

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Andrew Ellzey
Sent: Wednesday, April 05, 2006 2:45 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Metal prop on Velocity


That's disappointing to hear. I wonder if they tried to balance their prop
to get rid of the vibrations, I guess it doesn't matter it sounds like they
aren't interested in finding a solution.
 
Andy

----- Original Message ----- 
From: Andrew  <mailto:amillin at sbcglobal.net> Millin 
To: Velocity Aircraft Owners and Builders  <mailto:reflector at tvbf.org> list 
Sent: Wednesday, April 05, 2006 12:26 AM
Subject: REFLECTOR: Metal prop on Velocity

The prop was from Hartzell.  It had their semi-scimitar blade.  Velocity
noticed an increase in airspeed with it.  Things were looking good at OSH
last year.  Scott Baker reported that MT was anxious that there might be
another option for us.
 
Unfortunately, after OSH Hartzell went to Velocity to perform some vibration
tests on the aircraft.  There were problems and the prop was withdrawn and
will not be made available.
 
It appears they were able to provide the prop from existing parts.  I.e.,
they didn't develop it specially for us.  It was probably sitting on a shelf
somewhere.  And is probably back on that same shelf now.
 
They do not have plans to start a program to get a prop for us.
 
Andy

Andrew Ellzey <ajlz72756 at yahoo.com> wrote:

When I purchased my kit last April after sun & fun, Velocity had a aluminum
pusher prop that they were showing and testing. Has anyone heard of the
results of these trials? It was supposed to be priced competitively with MT.
 
Andy 

----- Original Message ----- 
From: Ron  <mailto:romott at adelphia.net> Brown 
To: Velocity Aircraft Owners and Builders  <mailto:reflector at tvbf.org> list 
Sent: Tuesd! ay, April 04, 2006 6:56 PM
Subject: Re: REFLECTOR: Aerocomposite Prop

I was talking to a long time Mix Master owner and asked him about the rear
prop blades.  He said he never had a problem with the rear prop, just the
engine - running hot back there.
 
I asked the question about metal props back there, and no one could give
definitive info about the problem (canard and Velocity lists).  Someone said
that Mike Melville had a metal prop on of his first pushers (Vari?), he flew
it and said that "damn" metal prop is vibrating and has to come off.  But
beyond that, no one had any real data.
 
Ronnie
 
 

----- Original Message ----- 
From: HYTEC45 at aol.com 
To: reflector at tvbf.org 
Sent: Tuesday, April 04, 2006 6:19 PM
Subject: Re: REFLECTOR: Aerocomposite Prop


In a message dated 4/4/2006 2:52:17 P.M. Pacific Standard Time,
michalk at awpi.com writes:

They sell props for tractor 
airplanes, and I assume Lycoming 4 cylinders, why do they have problems 
here?


One thing we have to deal with that tractors don't is the trailing edge wake
from the wing hitting the prop.  Someone smarter than I may be able to chime
in if this has anything to do with prop performance.  I know the mix-masters
from Cessna had problems with the rear prop even though it was basically the
same as the front, but with pusher blades.
 
TEC  
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