Seasonal Prop Pitch Adjustment - Zenith Aircraft Builders and Flyers2024-03-29T14:54:09Zhttps://zenith.aero/forum/topics/seasonal-prop-pitch-adjustment?commentId=2606393%3AComment%3A595898&feed=yes&xn_auth=noReplying to WT comment questi…tag:zenith.aero,2017-11-06:2606393:Comment:5962052017-11-06T13:31:14.937ZJohn M Greinerhttps://zenith.aero/profile/JohnMGreiner
<p>Replying to WT comment question...</p>
<p>I am going with Viking 130 on a STOL 750 so I will work with Jan and other builders to to get my STOL pitch figured out, which means even slower top speeds or cruise, but awesome climb rates. So prop pitch is fairly straight forward, from what I understand. Lower pitch, allows the engine to spin faster, more torque produced, so the prop will maintain a more constant RPM, so at high pitch it can keep pulling you out at high AOA, like throwing your…</p>
<p>Replying to WT comment question...</p>
<p>I am going with Viking 130 on a STOL 750 so I will work with Jan and other builders to to get my STOL pitch figured out, which means even slower top speeds or cruise, but awesome climb rates. So prop pitch is fairly straight forward, from what I understand. Lower pitch, allows the engine to spin faster, more torque produced, so the prop will maintain a more constant RPM, so at high pitch it can keep pulling you out at high AOA, like throwing your pickup into low gear and full power to pull you through the mud. Cost being, a high speed prop at low pitch eventually gets more in the way as you speed up in the air stream, just like your truck, you can't get going down the interstate highway in first gear very fast. Now the opposite is true with higher pitch, bigger bites of air. Does better at higher speeds because it cuts the air more efficiently or in sync with your speed as it cuts, or cork screws through the air. I hope I can use a pitch somewhere in the middle, and use the extra 30 HP to create enough torque to maintain prop RPM at high AOA. If this description is wrong or too basic, I apologize, but its the logic I plan to use when adjusting my prop pitch.</p> I thought the same thing Dave…tag:zenith.aero,2017-11-05:2606393:Comment:5958982017-11-05T17:12:55.630ZJoe Hopwoodhttps://zenith.aero/profile/JoeHopwood
<p>I thought the same thing Dave, but did not want to expose my ignorance if I was wrong. :-)</p>
<p>I thought the same thing Dave, but did not want to expose my ignorance if I was wrong. :-)</p> Hi Gary,
I also have a warp d…tag:zenith.aero,2017-11-05:2606393:Comment:5961822017-11-05T13:55:42.262ZDavid Krakowskyhttps://zenith.aero/profile/DavidKrakowsky
Hi Gary,<br />
I also have a warp drive three blade also, but on a continental o-200<br />
Are you sure you didn’t flip the numbers?<br />
When the pitch goes down, a flatter prop, usually the top speed goes down and the rpms go up, climb rate increases.<br />
I am in flat, hot Florida and also run between 10 and 11 degrees, right know I think I gave it set to 10.5<br />
Top end on my plane is only about 110 at 2650, but I am only running 100 hp on a good day.<br />
Dave
Hi Gary,<br />
I also have a warp drive three blade also, but on a continental o-200<br />
Are you sure you didn’t flip the numbers?<br />
When the pitch goes down, a flatter prop, usually the top speed goes down and the rpms go up, climb rate increases.<br />
I am in flat, hot Florida and also run between 10 and 11 degrees, right know I think I gave it set to 10.5<br />
Top end on my plane is only about 110 at 2650, but I am only running 100 hp on a good day.<br />
Dave I think I have the same set u…tag:zenith.aero,2017-11-05:2606393:Comment:5958902017-11-05T11:29:07.247ZGil DeVaulthttps://zenith.aero/profile/GilDeVault
<p>I think I have the same set up as you, 0-235 and three blade adjustable prop. I have no idea how to adjust the prop!<a href="http://storage.ning.com/topology/rest/1.0/file/get/2131730767?profile=original" target="_self"><img class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2131730767?profile=RESIZE_1024x1024" width="721"></img></a> Right now I'm getting all my paperwork done, aircraft annual and BFR, but low ceilings and rain are making it almost impossible to get this all done in time to view the Ozarks Autumn Foliage before all the leaves have fallen. One quick question, in level flight…</p>
<p>I think I have the same set up as you, 0-235 and three blade adjustable prop. I have no idea how to adjust the prop!<a href="http://storage.ning.com/topology/rest/1.0/file/get/2131730767?profile=original" target="_self"><img width="721" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/2131730767?profile=RESIZE_1024x1024"/></a>Right now I'm getting all my paperwork done, aircraft annual and BFR, but low ceilings and rain are making it almost impossible to get this all done in time to view the Ozarks Autumn Foliage before all the leaves have fallen. One quick question, in level flight with your 601 do you have a slight nose high in level flight ? When I flew the 650 last week we only had a 700' ceiling and not much of a reference, and the plane had the EFIS which I knew nothing about. It seemed to me the nose was just a little above the horizon in level flight and Rodger told me with my 0235 mine would most likely look the same way. </p>
<p></p>
<p>gil</p>