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Sounds like you are doing the right things, Steve
My engine idles between 1800-2000 rpm and I believe Tracy's does the same.
Without a flywheel and load prop mass, it needs a bit more rpm to be smooth
than say an Automobile. With my newest manifold it will actual idle close
to 1200 rpm, but it is not smooth and sounds like it may want to quite, so I
set it higher.
I personally think that 5000 rpm is a good place to start. The balance is
between higher rpm (which does produce more power) and thrust generated
(more loading reduces rpm). I would think you don't want the pitch so fine
it generates lots of rpm but low thrust, nor rpm so low that you have a good
bit (pitch) but not enough rpm (power) to generate lots of thrust.
My prop has a 72 inch pitch and I generate between 5200-5600 rpm for take
off. Since I only have two blades and less diameter (and perhaps less
pitch), it would follow that I would generate more rpm to generate the same
amount of thrust.
Might be good to find out who else is currently flying with the IVO on a
rotary and see what they recommend. I think its fairly clear that the
rotary should be less abusive to an IVO than a Lycoming, so hopefully you
won't have any problems with it.
Best Regards and keep us informed on how it goes.
I am still waiting for my nickel plated tubes. Apparently the plating folks
ran into a problem on getting the plating to adhere on the inside walls.
They glass bead the outside, but obviously harder to get a good beading on
the inside. Fortunately, the plant manager viewed it as a challenge to his
professional skills and is doing some research, so we will see.
Best Regards
Ed
----- Original Message -----
From: "Steve Brooks" <steve@tsisp.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, March 27, 2004 7:54 AM
Subject: [FlyRotary] Re: It Still Runs
> Ed,
> things are definitely moving forward. This is a great weekend weather wise
> to get my priming done, or at least the first round of it.
>
> I kept the engine turned over quite often. Just about every time I worked
> on the plane I would turn the prop a couple times. I got turn over at
least
> once or twice a week. I did a little tuning yesterday, only for a couple
> MAP points, but it went well, and definitely makes a difference in the
> smoothness.
>
> The prop is a blade 72" Ivoprop Magnum. It has the high pitch blades, but
I
> don't remember the range. I know it goes up to 90 on the pitch, but I
don't
> remember the bottom number. I had already bought the prop when I heard
> about another incident with cracking blades. I though that problem was
> behind them, but it was on a Lycoming, so I'm hoping that I won't have any
> problems running on the smoother rotary. I really like the concept of the
> design, and down the road I can add the in-flight adjust motor for only
> $900. Right now, it is what they call a ground quick adjust. I'm not
sure
> how much pitch I have right now. I cranked in only a little bit, but the
> blades has a pretty good pitch to them to start with. I will be keeping a
> very wary eye on the prop for any signs of cracking.
>
> I'll just adjust the prop to get the proper static RPM.
>
> 2 questions. What RPM are you using for idle ? What static RPM is best
for
> a starting point ? I was thinking that it was in the 4800-5000 RPM range,
> but I may be wrong.
>
> Steve Brooks
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
> Behalf Of Ed Anderson
> Sent: Friday, March 26, 2004 6:57 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: It Still Runs
>
>
> Hi Steve,
>
> Always good to hear that things have not regressed after 4 months
{:>).
> I once let my old 6 port engine remain idle for only six weeks and the
apex
> seals oxidized in their slots. After a week of poking through the exhaust
> port, I managed to free 5 of the 6, but eventually had to take the engine
> off to find that leaving the intake manifold off after flooding the engine
> (HALTECH EFI went bad and opened the injectors) apparently caused the apex
> seals to lightly rust. The gasoline that flooded the engine apparently
> washed the oil off the seals and my having taken the intake manifold off
> left it exposed to some hot and high humidity days.
>
> Moral of the story, I don't leave the intakes exposed especially if you
> might have flooded the engine and washed the protective oil coating off.
I
> turn the engine over ever two weeks regardless of whether I fly or not.
>
> Perhaps a drag chute is in order. Always nice to have that kind of power.
> What is your propeller parameters?
>
> Ed
>
> Ed Anderson
> RV-6A N494BW Rotary Powered
> Matthews, NC
> ----- Original Message -----
> From: "Steve Brooks" <steve@tsisp.com>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Friday, March 26, 2004 6:45 PM
> Subject: [FlyRotary] It Still Runs
>
>
> > I took my plane outside today after 4 months of being inside doing the
> > finishing. It is now ready to be primed, and the weather is good, so I
> took
> > everything outside to work on it. It had been 4 months since I had last
> > started the rotary, and it hadn't been started since I plumbed the turbo
> > into the intake system, so I was anxious to see how that was going to
work
> > out.
> >
> > The engine started after about 2 revolutions, and though a little rough
to
> > start, smoothed out nicely. The mixture gauge shows it's a little on
the
> > rich side, but I hadn't done much tuning on the EC2, since the turbo was
> > connected up to the intake yet. I'm going to have to read Tracy's
> > instructions again on how to do it, so that I get it running a little
> > leaner. It's so rich that the control seems to have little effect.
> >
> > At ant rate, I ran the engine 2 or three times, topping off the coolant
> each
> > time. On the third run, I ran it up to 3500, for a few seconds, and
then
> > back down (it's idling about 2000 rpms). The next run up, I ran it up
to
> > 4000, and with the brakes locked, the tires started sliding in the
grass.
> > WOW, does the turbo add power ! I'll run it some more tomorrow, but
I'll
> > take it to the driveway, which is asphalt before running up too many
RPM's
> >
> > I can't wait to fly this thing. It seems to have more power than I
> imagined
> > it would, and it should scoot down the runway pretty good.
> >
> > Steve Brooks
> > Cozy MKIV 13BT
> > ready for primer (great - something else to sand)
> >
> >
> > >> Homepage: http://www.flyrotary.com/
> > >> Archive: http://lancaironline.net/lists/flyrotary/List.html
> >
>
>
>
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html
>
>
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html
>
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