apilot(at)surewest.net
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 Posted: Mon May 03, 2010 2:15 pm Post subject: In-flight Electric Adjustable IvoProp....reply |
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Sorry, I do not know where the Michelle Cole came from. Vic
---- Original message ----
| Quote: | Date: Mon, 3 May 2010 05:32:29 -0700
From: owner-kolb-list-server(at)matronics.com (on behalf of Mike Welch <mdnanwelch7(at)hotmail.com>)
Subject: RE: In-flight Electric Adjustable IvoProp
To: <kolb-list(at)matronics.com>
Mrs. Michelle Cole (I really know you're Vic G. he
he),
Thanks for the feedback regarding your IvoProp. I
am glad to hear you don't fiddle with it much.
That's one of the things I did NOT want to do
(adjust it much). I'd be happy if I could just set
it...and forget it.
I think I'll still build the circuit, tho. With
my very limited experience with adj. props, I think
knowing roughly where the pitch is will be better
than nothing (at least for me).
My Ivo is already cut down to a 70" diameter. I
bought it that way.
I second what Bro Pike said. How about a full
run-down on your engine....performance, numbers,
noise levels, as much as you can fill in the blanks.
Regarding GEO engines, and their performance; it
shouldn't be too much longer before I can fire mine
up again. I had it 100% complete and running at one
time, prior to installing the turbo, but then
decided to add my own turbocharger and hi-po cam.
Adding a turbo should put the power around a Rotax
912, maybe more...maybe less. I won't know exactly,
until I can measure thrust and other stuff. We'll
see.......
BTW, my installation includes a host of gauges
that monitor all the critical things to watch for,
i.e. boost gauge, EGT, AFR, Manifold Pressure, etc.
To install my turbo package (turbo, gauges, new
muffler, cam, etc.), I have spent a total of around
$1500. Add this to my engine and prop costs of
$6500 and I have a grand total cost of $8000 for
everything.
Mike Welch
MkIII
> From: apilot(at)surewest.net
> Subject: Re: In-flight Electric
Adjustable IvoProp
> To: kolb-list(at)matronics.com
> Date: Sun, 2 May 2010 19:42:54 -0700
>
>
Cole" <apilot(at)surewest.net>
>
> I find that I almost never need to adjust the
prop. After going through much thrust testing. I
found that the difference from 5000 rpm to and
through 6300 rpm only gives an additional 40 lbs of
thrust. Since I do not like to run over 5000 because
of the fact that 4 cycles (Geo Metro Suzuki G10
engine) have more service life than when operated in
the higher rpm range. I do believe that the windage
tray and the re-ground cam have given me more power.
As for popping the breaker, it has only happened
once on the ground when I over pitched it. Also, for
reasons that I do not understand, I get more thrust
from cutting the 3-blade 72" dia down to
> 70" dia. I fly with a friend in a Maxair Drifter
with a 582 Rotax. We have about the same climb and
cruise and he burns around 4 gallons per hour and I
burn slightly over 2.5 gallons per hour. His engine
weight is 135 lbs and mine is 145 lbs with electric
prop, exhaust and radiator.
> Vic Kolb Mark III Classic
>
> ---- Original message ----
> >Date: Sun, 2 May 2010 07:47:59 -0700
> >From: owner-kolb-list-(at)matronics.com (on behalf
of Mike Welch <mdnanwelch7(at)hotmail.com>)
> >Subject: In-flight Electric Adjustable
IvoProp
> >To: <kolb-list(at)matronics.com>
> >
> > Kolb guys,
> >
> > For those of you that have Ivo Props, and
> > especially those of you that have them equiped
with
> > the electrical adjustment motor, the discussion
came
> > up about their control on the Aeroelectric list.
> > A guy that has the electric operated prop
> > mentioned he sure would like to know when the
motor
> > is drawing it's limit of amps, BEFORE it has to
pop
> > the circuit breaker. (If you change the pitch in
> > flight, about the only way to find out where the
> > pitch is, is to twist the prop all the way flat,
> > until the circuit breaker has been maxed out,
and
> > pops! Not a very good way to go!
> >
> > So, after a couple of suggestions, and one
> > preliminary design, Bob Nuchols (the
Aeroelectric
> > guru!!) came up with this design (see
attahment).
> > Now, when a person changes pitch in flight, an
> > electrical circuit will notify him of the
increasing
> > current draw, and light an LED at a preset
current,
> > rather than exceed this limit and pop the
breaker.
> > Much better way to go!!
> >
> > Bob included an email with his design that
> > identified the intended parameters. If anyone is
> > interested, let me know, and I'll copy it and
send
> > it to you.
> >
> > Mike Welch
> > MkIII
> >
> > ------------------------------------------------
> >
> > The New Busy is not the old busy. Search, chat
and
> > e-mail from your inbox. Get started.
> >________________
> >IVO-Prop_Pitch_Co=====================
>
>
>
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