X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail.qnsi.net ([66.219.56.248] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3324323 for flyrotary@lancaironline.net; Sun, 30 Nov 2008 20:02:22 -0500 Received-SPF: none receiver=logan.com; client-ip=66.219.56.248; envelope-from=bhughes@qnsi.net Return-Receipt-To: "Bobby J. Hughes" Subject: RE: [FlyRotary] : First Flight, short and hot MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C95350.6C69B1C8" Disposition-Notification-To: "Bobby J. Hughes" Content-class: urn:content-classes:message Date: Sun, 30 Nov 2008 19:02:03 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.5 Message-ID: <74120FDE88CAFE4DBDA8814BCE20A3F30A97B3@qnsi-mail.qnsi.net> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] : First Flight, short and hot Thread-Index: AclS/NkHo61OPbYTRh+bZ6iEJP39TgAUmVgg References: From: "Bobby J. Hughes" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C95350.6C69B1C8 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Jeff, =20 What's your water temp during extended ground runs with your cowling off? With OAT <70F I have only been able to get my water to 177 and oil to 144 during extended ground runs up to 7500 rpm.=20 =20 Any pic you can share? =20 Bobby Renesis ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Jeff Whaley Sent: Sunday, November 30, 2008 9:03 AM To: Rotary motors in aircraft Subject: [FlyRotary] : First Flight, short and hot I was in the right seat (flight engineer) when my homebuilt 2+2 made its first flight yesterday with the 13B Mazda engine, but not without problems. The coolant temperature reached 230F by circuit altitude; after throttle back and approach it had only dropped to about 225F; the oil temperature was indicating only 160F (this could be a mounting-point issue or real I'm not sure ... oil temp measure point is from a small manifold bolted to the PSRU mounting plate, with oil flowing from engine to PSRU) outside air temperature was about 32-33F. The coolant pressure pegged the gauge beyond 20 psi, which was a surprise as the pressure cap is rated for 20 psi ... I expected the engine to burp itself out and maintain 20 psi. =20 I tightened up the cowling around the radiator and removed the thermostat in an attempt to make a second flight but while removing the thermostat I noticed one of the alternator V-belts was broken ... got another belt only to find it didn't match the other ... these belts really need to be a matched-pair. Prior to flight, I noticed the outside belt (which broke) did not have the same tension as the inside belt; it must have climbed out of the pulley groove and got sliced by the pulley. Previously I bought a double alternator pulley from Racing Beat but never installed it, due to difficulty with removing the nut ... thought it best to leave well enough alone ... I will now put on that new pulley. =20 Hope to make another flight next weekend if the test pilot is in agreement. Any comments/experience on thermostat Vs no thermostat? Why would the pressure cap hold beyond its rating? Jeff Whaley C-FJWW =20 =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook Sent: Saturday, November 29, 2008 3:10 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Renesis fuel burn =20 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 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. =20 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. =20 The present runner length is 17" and I think it is not enough. =20 Rino Lacombe Renesis powered Glass Goose =20 ------_=_NextPart_001_01C95350.6C69B1C8 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
Jeff,
 
What's your water temp during extended ground = runs with=20 your cowling off?  With OAT  <70F I have only been able to = get my=20 water to 177 and oil to 144 during extended ground runs up to 7500 rpm.=20
 
Any pic you can share?
 
Bobby
Renesis
From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of Jeff=20 Whaley
Sent: Sunday, November 30, 2008 9:03 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] : First Flight, short = and=20 hot

I=20 was in the right seat (flight engineer) when my homebuilt 2+2 made its = first=20 flight yesterday with the 13B Mazda engine, but not without problems. = The=20 coolant temperature reached 230F by circuit altitude; after throttle = back and=20 approach it had only dropped to about 225F; the oil temperature was = indicating=20 only 160F (this could be a mounting-point issue or real I’m not = sure … oil temp=20 measure point is from a small manifold bolted to the PSRU mounting = plate, with=20 oil flowing from engine to PSRU) outside air temperature was about = 32-33F. The=20 coolant pressure pegged the gauge beyond 20 psi, which was a surprise as = the=20 pressure cap is rated for 20 psi … I expected the engine to burp = itself out and=20 maintain 20 psi.

 

I=20 tightened up the cowling around the radiator and removed the thermostat = in an=20 attempt to make a second flight but while removing the thermostat I = noticed one=20 of the alternator V-belts was broken … got another belt only to = find it didn’t=20 match the other … these belts really need to be a matched-pair. = Prior to flight,=20 I noticed the outside belt (which broke) did not have the same tension = as the=20 inside belt; it must have climbed out of the pulley groove and got = sliced by the=20 pulley. Previously I bought a double alternator pulley from Racing Beat = but=20 never installed it, due to difficulty with removing the nut … = thought it best to=20 leave well enough alone … I will now put on that new=20 pulley.

 

Hope=20 to make another flight next weekend if the test pilot is in=20 agreement.

Any=20 comments/experience on thermostat Vs no = thermostat?

Why=20 would the pressure cap hold beyond its rating?

Jeff=20 Whaley

C-FJWW

 

 

From: Rotary = motors in=20 aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy=20 Crook
Sent: Saturday, November 29, 2008 3:10 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Renesis fuel=20 burn

 

If you haven't = calibrated the EM2=20 fuel flow yet, the GPH reading does not mean anything.  Don't make = any=20 decisions based on that reading.   Calibrating the fuel flow = is the=20 most difficult and time consuming parts of EM2 setup.   That's = the=20 down side of doing it with such an inexpensive flow sensor ($0.00) since = it has=20 none.   The other option is to use a Floscan flow sensor with = the=20 EM2  but they are pricy.

  At 30" of manifold pressure = and best=20 power mixture setting and 6400 RPM you should get a fuel burn somewhere = around=20 15 - 18 GPH.  The exact amount will depend on other factors like = exact=20 mixture setting, your intake manifold, exhaust system, air temp,=20 etc.

Tracy Crook

On Thu, Nov 27, 2008 at 6:32 PM, Rino <lacombr@nbnet.nb.ca>=20 wrote:

Where can I=20 get information on fuel burn and power for the=20 renesis?

The maximum=20 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=20 should be able to get a higher fuel burn than = that.

 

The other=20 part of the problem.  What should be the intake manifold runner = length on=20 the Renesis.  Best power has to be between 6000 and 6500 = rpm=20 limited by the propeller and redrive configuration.   I cannot = use=20 more than 65" dia. prop.

 

The present=20 runner length is 17" and I think it is not = enough.

 

Rino=20 Lacombe

Renesis = powered Glass=20 Goose

 

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