Pitch settings and cruise speed - Zenith Aircraft Builders and Flyers2024-03-29T09:46:20Zhttps://zenith.aero/forum/topics/pitch-settings-and-cruise-speed?commentId=2606393%3AComment%3A832628&feed=yes&xn_auth=noSame prop as before: 64 diame…tag:zenith.aero,2023-05-17:2606393:Comment:9030872023-05-17T13:15:58.894ZPeter Eibergerhttps://zenith.aero/profile/PeterEiberger
<p>Same prop as before: 64 diameter x 35 pitch.</p>
<p></p>
<p>Initial reports on the 64x37 sound like it definitely lowers RPM, but it doesn't climb as well. </p>
<p>Same prop as before: 64 diameter x 35 pitch.</p>
<p></p>
<p>Initial reports on the 64x37 sound like it definitely lowers RPM, but it doesn't climb as well. </p> I appreciate the update. Wh…tag:zenith.aero,2023-05-17:2606393:Comment:9028662023-05-17T00:20:17.039Zcharlie rosenzweighttps://zenith.aero/profile/charlierosenzweig
<p>I appreciate the update. What pitch were you using on the flight with the latest numbers? Charlie </p>
<p>I appreciate the update. What pitch were you using on the flight with the latest numbers? Charlie </p> UPDATE:
Over the past 20 or s…tag:zenith.aero,2023-04-25:2606393:Comment:9005832023-04-25T12:52:36.910ZPeter Eibergerhttps://zenith.aero/profile/PeterEiberger
<p>UPDATE:</p>
<p>Over the past 20 or so hours, the rings have have really seated and the engine definitely makes more power now:</p>
<ul>
<li>WOT in level flight is now 3350RPM @ 92kts indicated (12:1AFR).</li>
<li>WOT at 60kts climb is 3150-3170 RPM (12:1 AFR) </li>
</ul>
<p>UPDATE:</p>
<p>Over the past 20 or so hours, the rings have have really seated and the engine definitely makes more power now:</p>
<ul>
<li>WOT in level flight is now 3350RPM @ 92kts indicated (12:1AFR).</li>
<li>WOT at 60kts climb is 3150-3170 RPM (12:1 AFR) </li>
</ul> error in posttag:zenith.aero,2023-02-21:2606393:Comment:8930262023-02-21T12:16:56.918Zcharlie rosenzweighttps://zenith.aero/profile/charlierosenzweig
<p> error in post</p>
<p> error in post</p> "Definitely a climb prop"
So…tag:zenith.aero,2023-01-12:2606393:Comment:8886412023-01-12T17:40:44.975ZBryan Walstromhttps://zenith.aero/profile/BryanWalstrom
<p>"Definitely a climb prop"</p>
<p>So what was the "CLIMB?" </p>
<p>"Definitely a climb prop"</p>
<p>So what was the "CLIMB?" </p> Here is my data thus far, sti…tag:zenith.aero,2022-12-27:2606393:Comment:8878822022-12-27T23:57:37.061ZPeter Eibergerhttps://zenith.aero/profile/PeterEiberger
<p>Here is my data thus far, still in phase 1 testing:</p>
<p>WW 2850cc with Sensenich W64ZKL-35 (64x35, definitely a climb prop).</p>
<p></p>
<p>Full Static RPM - 2980RPM (12:1 AFR)</p>
<p></p>
<p>Flight Data 4740 Density Altitutde:</p>
<p>3200 RPM (WOT) - 87kt indicated 94 True</p>
<p>2880 (-10% RPM, 73% pwr) - 79kt/85kt</p>
<p>2560 (-20% RPM, 50% pwr) - 65kt/69kt</p>
<p></p>
<p>2950 RPM, 12:1 AFR (best power), I get 81-82 kts indicated, and ~6 gph. I do not have a fuel flow meter, so this…</p>
<p>Here is my data thus far, still in phase 1 testing:</p>
<p>WW 2850cc with Sensenich W64ZKL-35 (64x35, definitely a climb prop).</p>
<p></p>
<p>Full Static RPM - 2980RPM (12:1 AFR)</p>
<p></p>
<p>Flight Data 4740 Density Altitutde:</p>
<p>3200 RPM (WOT) - 87kt indicated 94 True</p>
<p>2880 (-10% RPM, 73% pwr) - 79kt/85kt</p>
<p>2560 (-20% RPM, 50% pwr) - 65kt/69kt</p>
<p></p>
<p>2950 RPM, 12:1 AFR (best power), I get 81-82 kts indicated, and ~6 gph. I do not have a fuel flow meter, so this was measured using one tank only at cruise with a timer. This will probably be my cruise rpm, but leaned to 13:1</p>
<p></p>
<p>I have a Cruzer with 21" mains and 8.00-6 on the nose. </p> Hi Peter,
I get about 5 gph…tag:zenith.aero,2021-04-27:2606393:Comment:8337162021-04-27T02:32:30.128ZDale Waltershttps://zenith.aero/profile/DaleWalters
<p>Hi Peter,</p>
<p></p>
<p>I get about 5 gph at 89knots/2600rpm/7500agl</p>
<p></p>
<p>You?</p>
<p>Hi Peter,</p>
<p></p>
<p>I get about 5 gph at 89knots/2600rpm/7500agl</p>
<p></p>
<p>You?</p> What is your fuel burn at tha…tag:zenith.aero,2021-04-27:2606393:Comment:8337852021-04-27T02:12:16.461ZPeter Eibergerhttps://zenith.aero/profile/PeterEiberger
<p>What is your fuel burn at that speed/rpm/altitude? </p>
<p>What is your fuel burn at that speed/rpm/altitude? </p> Me too!tag:zenith.aero,2021-04-17:2606393:Comment:8326282021-04-17T23:48:23.869ZDavid Krakowskyhttps://zenith.aero/profile/DavidKrakowsky
<p>Me too!</p>
<p>Me too!</p> Dale, if I'm flying to breakf…tag:zenith.aero,2021-04-10:2606393:Comment:8320712021-04-10T20:36:57.599ZDave Gardeahttps://zenith.aero/profile/DaveGardea
<p>Dale, if I'm flying to breakfast or lunch with my buddy who has an RV7A, that's usually my cruise. If I'm flying alone, I'll throttle back to 105-110 MPH to enjoy the scenery and burn less fuel.</p>
<p></p>
<p>Dave</p>
<p>Dale, if I'm flying to breakfast or lunch with my buddy who has an RV7A, that's usually my cruise. If I'm flying alone, I'll throttle back to 105-110 MPH to enjoy the scenery and burn less fuel.</p>
<p></p>
<p>Dave</p>