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Using a Toyota Supra TB on the Renesis about 65 mm dia. 5800 - 6000 static rpm depending on temp ,humidity, etc. 74 x 88 2 blade Performance prop Top end rpm about 7300.
Using an RX-8 TB on the 20B, 75mm dia. About the same static RPM. 72 x 104 3 blade Catto prop. Do not know top end rpm yet and may never know. Top speed is above Vne.
Both engines have very linear throttle response through the whole range.
Tracy
On Wed, Feb 10, 2010 at 9:46 AM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
Tracy,
What are you getting for static and top end rpm now on your current
Renesis and also on your 20B? What props are they both pulling? Are
you using the stock throttle body on the Renesis? If not, what is the MM size
of the one you are using? Do you have any unused throttle on either of
the two planes?
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Tracy Crook
Sent: Wednesday, February 10, 2010
8:35 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: rpm vs
Power was : Throttle limits was Re: N.A. Renesis to turbo
Sun 100 flown at 500 ft.
Top speed on a normally aspirated aircraft is always best at
sealevel. Best fuel economy is reached up high.
Tracy
On Tue, Feb 9, 2010 at 10:45 PM, Mike Wills <rv-4mike@cox.net> wrote:
When you guys put out these numbers (RPM, speed, etc...)
would also be helpful to know at what altitude. I assume at or close to sea
level? I havent yet made any speed runs at low altitude.
Sent: Tuesday,
February 09, 2010 5:27 PM
Subject:
[FlyRotary] Re: rpm vs Power was : Throttle limits was Re: N.A. Renesis to
turbo
Tracy, if you have the data could you give us
the RPMs you saw at the 205 and 217.5 air speeds?
Dennis H.
Renesis RV-7A
Austin, Tx.
That was 209 and 217.5
the 209 mph speed was with the 2.176 drive turning a 68 - 71 prop with engine
turning 6300 , mixture leaned to 17 gph. On other occasions I could push
it to 6400 at best power mixture burning 20 gph.
The 217.5 mph was with a 2.85 drive turning a 74 - 88 prop with engine turning
7250. I didn't get a good read on the fuel flow but obviously it would
have been higher. I remember requesting priority landing after the race
due to low fuel.
Neither run was done at best power mixture but leaned a few gph less than max.
Tracy
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