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THANKS, Dennis.
It really didn’t hurt too much turning 70
{:>).
Terrible to hear about your sister with
cancer, keep hoping that medical progress will banish that as well as its done
small-pox.
Fly safely.
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Dennis Haverlah
Sent: Saturday, February 13, 2010
3:46 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: rpm vs
Power was : Throttle limits was Re:N.A.Renesis to turbo
Thanks Chris,
I'll be going into Pearland so probably won.t see you. The last time I
landed at Pearland the airport was
in town and not as good as a pot holed 2 lane country road!
Happy BIG 70 th.
Birthday ED ANDERSON!!
Dennis H.
Chris Barber wrote:
I am sorry to hear about your sister.
I should be at the hangar most the day on Saturday
at Ellington (EFD) if'n you need someone to watch your plane <g>
From: Rotary motors in aircraft [flyrotary@lancaironline.net] on
behalf of Dennis Haverlah [clouduster@austin.rr.com]
Sent: Friday, February 12, 2010
9:53 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: rpm vs
Power was : Throttle limits was Re:N.A. Renesis to turbo
I'm flying the RV to Houston
Saturday morning to visit my sister - she has a very bad cancer. I'll get
you more info on my intake Monday.
Dennis H.
Bryan Winberry wrote:
Mike,
I found it. Here it is.
Bryan
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
On Behalf Of Mike Wills
Sent: Friday, February 12, 2010
8:47 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: rpm vs
Power was : Throttle limits was Re: N.A. Renesis to turbo
So for that RPM, how long did your
intake runners end up being?
For what its worth, I tried to
emulate Tracy's
dynamically tuned intake as well. But cowl constraints probably compromised the
intake at the point where the TB is mounted. This is something I want to modify
anyway. As it is things are tight enough that I cant even run any sort of air
filter, so I do need to make some changes here - may as well try to do it
right.
I know I had a picture of your
intake - saw it just recently. But cant find it now. Could you re-post it?
Sent: Friday,
February 12, 2010 11:19 AM
Subject:
[FlyRotary] Re: rpm vs Power was : Throttle limits was Re: N.A. Renesis to
turbo
I used the same 65 mm
Mustang throttle body on both my original and new intakes. If I
remember correctly, I believe I had a longer unused throttle travel with
the original intake but I never measured it. I don't know the static rpm
increase with the new intake - probably have that in my notes some where but my
max. rpm at high altitude (8,000 - 10,000) increased 400-500 rpm. I
estimated I went from 165 -170 HP with the old intake to about 185 HP with the
new intake. This in in line with Ed Anderson's recent note that Mazda got
about a 16% power increase at 6000 rpm with the DIE effect. I felt much
improved acceleration the first time I took off with the new intake.
the new intake is based on dynamic intake
effect (DIE) where the closing of an intake valve caused the
moving intake air to bounce off the valve creating a pressure wave. The
wave travels at the speed of sound to the other intake valve and arrives there
just before that valve closes. This increases the amount of air and fuel
that enters the combustion chamber. (As we know the rotary has no valves
but uses the sides of the rotor for opening and closing the intakes.) I
designed my intake to give max. performance at 6300 rpm.
If I had cut down my prop to 74" it would give me more clearance for the
prop on my RV-7A and increase my top end rpm. Max rpm is about 6400
rpm with the new intake and the 76" prop. I'm really not needing
higher RPM now.
Dennis Haverlah
Bill Bradburry wrote:
Dennis,
Did your static rpm increase with the new
manifold? How much? Did you before and do you now have any unused
throttle travel like Mike describes? Are you using the same
throttle body on the new manifold? What is the MM opening of the Mustang
body?
My manifold is very similar to your old one. My
tubes are cut just above the injector bosses, which makes them a little (maybe
an inch) shorter than your old ones. I have a 76 X 88 Performance prop
which I am considering having cut down to 74” like Tracy and Ed when I send it
in for final finish. I am using an aftermarket throttle body that is 75MM
in throat diameter. This is the same size as the stock Renesis throttle
body which is why I picked it. I had intended to use the Renesis body,
but didn’t wait for Tracy
to get the fly by wire done. I am not flying, but my static is 52-5300
rpm and I have a lot of throttle left at that rpm. The last probably ¼ of
the travel is not used.
Bill B
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