Cruise speed with Continental O-200 - Zenith Aircraft Builders and Flyers2024-03-28T09:54:01Zhttps://zenith.aero/forum/topics/cruise-speed-with-continental-o-200?feed=yes&xn_auth=noI have a CH 750 STOL and a CH…tag:zenith.aero,2022-09-19:2606393:Comment:8781812022-09-19T00:33:30.430ZTimothy Sparkshttps://zenith.aero/profile/TimothySparks
<p>I have a CH 750 STOL and a CH 750 Cruzer, both powered by a Continental O-200A. The STOL cruises at 85 MPH at 2400 RPM. The Cruzer cruises at 100 MPH at 2400 RPM.</p>
<p>I have a CH 750 STOL and a CH 750 Cruzer, both powered by a Continental O-200A. The STOL cruises at 85 MPH at 2400 RPM. The Cruzer cruises at 100 MPH at 2400 RPM.</p> Tuche(two shay) my poor Frenc…tag:zenith.aero,2022-01-08:2606393:Comment:8581962022-01-08T17:32:04.818ZNorm Neulshttps://zenith.aero/profile/NormNeuls
<p>Tuche(two shay) my poor French!</p>
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<p>Tuche(two shay) my poor French!</p>
<p></p> Speed is kind of an up hill b…tag:zenith.aero,2022-01-07:2606393:Comment:8580362022-01-07T15:28:36.043ZJohn Austinhttps://zenith.aero/profile/JohnLAustin
<p><em>Speed is kind of an up hill battle with a 750 STOL, I choose to ignore the ASI and just enjoy the outside view. :) </em></p>
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<p>Clint got it right: "It's the journey, not the destination."</p>
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<p>Or, more specifically in reference to speed: "When it come to a STOL 750, think Jeep and not Ferrari."</p>
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<p>John</p>
<p>N750A</p>
<p><em>Speed is kind of an up hill battle with a 750 STOL, I choose to ignore the ASI and just enjoy the outside view. :) </em></p>
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<p>Clint got it right: "It's the journey, not the destination."</p>
<p></p>
<p>Or, more specifically in reference to speed: "When it come to a STOL 750, think Jeep and not Ferrari."</p>
<p></p>
<p>John</p>
<p>N750A</p> Good afternoon Clint !!!I'm a…tag:zenith.aero,2022-01-06:2606393:Comment:8580192022-01-06T17:31:05.009ZPaulo Pagamissihttps://zenith.aero/profile/PauloPagamissi
<p>Good afternoon Clint !!!<br/>I'm also on the smaller 5" tires.<br/>I also set my flaprons higher than the Zenith design.<br/>I'm flying with a maximum RPM of 2500, as per the O-200 manual.<br/>Our numbers seem pretty close, except that I'm without the slats.<br/>Thank you very much for the information !!!!<br/>Good flights !!!</p>
<p>Good afternoon Clint !!!<br/>I'm also on the smaller 5" tires.<br/>I also set my flaprons higher than the Zenith design.<br/>I'm flying with a maximum RPM of 2500, as per the O-200 manual.<br/>Our numbers seem pretty close, except that I'm without the slats.<br/>Thank you very much for the information !!!!<br/>Good flights !!!</p> Hi Paulo, Lots of variables…tag:zenith.aero,2022-01-06:2606393:Comment:8578312022-01-06T02:17:55.959ZClint L Goschhttps://zenith.aero/profile/ClintLGosch
<p>Hi Paulo, Lots of variables come into play here as you know. I have not tried flying without slats but I typically cruise around a TAS of 84mph at 3000', IAS is around 78 to 81mph, I'm also running with smaller 5" cruzer tires. With my current prop pitch on my o-200 I have to turn 2600rpm with 24" of manifold pressure to get close to 75% power at 3000'. It's hard to know exactly what %HP you are running without a MP gauge, but you'll likely have to turn higher than 2500 rpm at that…</p>
<p>Hi Paulo, Lots of variables come into play here as you know. I have not tried flying without slats but I typically cruise around a TAS of 84mph at 3000', IAS is around 78 to 81mph, I'm also running with smaller 5" cruzer tires. With my current prop pitch on my o-200 I have to turn 2600rpm with 24" of manifold pressure to get close to 75% power at 3000'. It's hard to know exactly what %HP you are running without a MP gauge, but you'll likely have to turn higher than 2500 rpm at that altitude to get 75%. According to the manual o-200's seem to have to spin pretty fast to make anything close to published values. Calculating your TAS from your IAS and running a bit higher rpm you might find you are closer to 91o 93mph TAS without slats, but I would not expect much more than that. Speed is kind of an up hill battle with a 750 STOL, I choose to ignore the ASI and just enjoy the outside view. :) one other thing to check is your flaperon rigging, mine were rigged slightly to far "up" originally. I had found in flight "bumping" the flap switch down allowed me to cruise 2-3 mph IAS faster for the same power setting (had to re-trim the elevator slightly), this did not move the flaperons much, maybe 6-8mm down measured at the trailing edge, but it did seem to give a positive increase. Good luck and happy flying!</p>