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Thanks Tracy and Ed.
I know the EM2 is not reading right -- yet, I
am working on it. I just wanted to know what I should expect for a
reading. I just changed the prop pitch -- again, it is now set at 18 deg.
at 75 percent radius. During the last prop. static test I got a
maximum reading of 14.4 gph. 5985 rpm, map 29. I know the engine is
producing some power, I just sent in my Climb Test Report and recorded 3820 ft.
for a 3 minute climb. The Glass Goose was 1900 lb. gross for the
test. I keep the climb speed at 100 mph to have enough air flow to cool
the engine. I am working on the cooling system at the moment.
I would probably get a better climb rate at a speed around 80 mph.
For Ed.
I flew in Tom's aircraft and I know this one
performs better. Tom's Glass Goose has a 160 hp Lycoming.
No water landings yet. I am at the
airport, until next summer - it is cold up here!
The prop is a 4 blade, 65 in. ground adjustable
Warp Drive. The redrive is the RD-1A with a ratio of 2.176:1. I do
not want to run the engine above 6500 rpm. I am trying to achive 6500
rpm at top speed level flight.
One reading during flight: rpm 6350 MAP 29.6,
fuel burn 10.8, EGT 1800 (i figure it was very lean). I get about
120 mph level flight with an engine speed of 6000 rpm at 2000 feet, The airstrip
is at a level of 490 ft. I figure it is not too bad for a Glass
Goose.
Rino
----- Original Message -----
Sent: Saturday, November 29, 2008 4:10
PM
Subject: [FlyRotary] Re: Renesis fuel
burn
If you haven't calibrated the EM2 fuel flow yet, the GPH
reading does not mean anything. Don't make any decisions based on that
reading. Calibrating the fuel flow is the most difficult and time
consuming parts of EM2 setup. That's the down side of doing it
with such an inexpensive flow sensor ($0.00) since it has none.
The other option is to use a Floscan flow sensor with the EM2 but they
are pricy.
At 30" of manifold pressure and best power mixture
setting and 6400 RPM you should get a fuel burn somewhere around 15 - 18
GPH. The exact amount will depend on other factors like exact mixture
setting, your intake manifold, exhaust system, air temp, etc.
Tracy
Crook
On Thu, Nov 27, 2008 at 6:32 PM, Rino <lacombr@nbnet.nb.ca>
wrote:
Where can I get
information on fuel burn and power for the renesis?
The maximum fuel
burn I can get on takeoff is 11.7 gph (reading on the EM2) at 64 00
rpm. The EM2 is not fully calibrated yet! I think I
should be able to get a higher fuel burn than that.
The other part of
the problem. What should be the intake manifold runner length on the
Renesis. Best power has to be between 6000 and 6500 rpm
limited by the propeller and redrive configuration. I cannot use
more than 65" dia. prop.
The present
runner length is 17" and I think it is not enough.
Rino
Lacombe
Renesis powered
Glass
Goose
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