Catto props and UL engines - Zenith Aircraft Builders and Flyers2024-03-29T09:41:24Zhttps://zenith.aero/forum/topics/catto-props-and-ul-engines?commentId=2606393%3AComment%3A730175&feed=yes&xn_auth=noTim, yes, I have that prop p…tag:zenith.aero,2021-02-26:2606393:Comment:8241172021-02-26T01:10:44.121ZDavid J. Beaulieuhttps://zenith.aero/profile/DavidJBeaulieu
<p>Tim, yes, I have that prop package you listed. With approx 18 1/2 degree of pitch I was able to achieve a static rpm slightly above 2600 pm, Inflight, level flight, WOT, I saw approx 2950, maybe 3000 RPM. Will be doing a 50 hr inspection on the prop tomorrow (got to pull the blades and hubs) and will verify the pitch and RPM numbers again once I get it flying.</p>
<p>Tim, yes, I have that prop package you listed. With approx 18 1/2 degree of pitch I was able to achieve a static rpm slightly above 2600 pm, Inflight, level flight, WOT, I saw approx 2950, maybe 3000 RPM. Will be doing a 50 hr inspection on the prop tomorrow (got to pull the blades and hubs) and will verify the pitch and RPM numbers again once I get it flying.</p> Which WhirlWind blades are yo…tag:zenith.aero,2021-02-25:2606393:Comment:8241762021-02-25T23:59:56.272ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<p>Which WhirlWind blades are you using? GA-UL350-3B package with 66 inch blades?</p>
<p>Are you able to get anywhere close to 3300 rpm?</p>
<p></p>
<p>I haven't bought a propeller yet.</p>
<p>Which WhirlWind blades are you using? GA-UL350-3B package with 66 inch blades?</p>
<p>Are you able to get anywhere close to 3300 rpm?</p>
<p></p>
<p>I haven't bought a propeller yet.</p> David
I just replied to one o…tag:zenith.aero,2021-01-10:2606393:Comment:8018742021-01-10T00:06:45.295ZBob Widmerhttps://zenith.aero/profile/BobWidmer
<p>David</p>
<p>I just replied to one of your other posts on the UL engine. I'm considering the UL520iST for the CH750SD and Airmaster's comments for this engine are:</p>
<p></p>
<p style="font-weight: 400;"><em>For the UL520iST I would recommend model AP544CTF-SNR70U</em></p>
<p style="font-weight: 400;"><em> </em></p>
<p style="font-weight: 400;"><em>This utilises blade model SNR68U from Sensenich. They have designed this specifically as a STOL blade for the UL series of engine.…</em></p>
<p>David</p>
<p>I just replied to one of your other posts on the UL engine. I'm considering the UL520iST for the CH750SD and Airmaster's comments for this engine are:</p>
<p></p>
<p style="font-weight: 400;"><em>For the UL520iST I would recommend model AP544CTF-SNR70U</em></p>
<p style="font-weight: 400;"><em> </em></p>
<p style="font-weight: 400;"><em>This utilises blade model SNR68U from Sensenich. They have designed this specifically as a STOL blade for the UL series of engine.</em></p>
<p style="font-weight: 400;"><em>Having 4 blades will help to maintain performance at the higher altitudes.</em></p>
<p style="font-weight: 400;"><em>Budget on USD15k for a complete system.</em></p>
<p style="font-weight: 400;"></p>
<p style="font-weight: 400;">I've been flying since 1982 and fly a Seneca II but have never had a STOL so I'm way out of my league here (so much so that I'll be getting builder assist) so any comments from you or others would be appreciated on any issues with respect to the plane, engine, avionics, etc. etc.</p>
<p style="font-weight: 400;">Thx</p>
<p style="font-weight: 400;">Bob</p>
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<p style="font-weight: 400;"></p> Mel, I've got about 7 hrs on…tag:zenith.aero,2020-10-15:2606393:Comment:7517712020-10-15T12:13:23.025ZDavid J. Beaulieuhttps://zenith.aero/profile/DavidJBeaulieu
<p>Mel, I've got about 7 hrs on the WW prop since installing. So far, I like it on the 750 plus the fact it's adjustable versus the Catto. BTW, avid follower of your articles in Kitplanes!</p>
<p>Dave</p>
<p>Mel, I've got about 7 hrs on the WW prop since installing. So far, I like it on the 750 plus the fact it's adjustable versus the Catto. BTW, avid follower of your articles in Kitplanes!</p>
<p>Dave</p> I just received my GA Whirlwi…tag:zenith.aero,2020-10-14:2606393:Comment:7508502020-10-14T00:31:05.848ZMel Asberryhttps://zenith.aero/profile/MelAsberry
<p>I just received my GA Whirlwind 3-blade for my CH650/UL350 today. I've always flown Catto props on my RVs, but his current lead time was a deal breaker.</p>
<p>I just received my GA Whirlwind 3-blade for my CH650/UL350 today. I've always flown Catto props on my RVs, but his current lead time was a deal breaker.</p> OK. I didn't realize you wer…tag:zenith.aero,2020-10-12:2606393:Comment:7493332020-10-12T02:32:19.320ZPerry Hydenhttps://zenith.aero/profile/PerryHyden
<p>OK. I didn't realize you were discussing a 3 blade.</p>
<p></p>
<p>OK. I didn't realize you were discussing a 3 blade.</p>
<p></p> 3 bladed ajustable for the UL…tag:zenith.aero,2020-10-11:2606393:Comment:7490632020-10-11T13:08:18.982ZDavid J. Beaulieuhttps://zenith.aero/profile/DavidJBeaulieu
<p>3 bladed ajustable for the UL350iS not available, nor likely (according to Sensenich) - not enough demand to design/manufacture.</p>
<p>3 bladed ajustable for the UL350iS not available, nor likely (according to Sensenich) - not enough demand to design/manufacture.</p> I don't understand your last…tag:zenith.aero,2020-10-11:2606393:Comment:7485952020-10-11T01:20:03.538ZPerry Hydenhttps://zenith.aero/profile/PerryHyden
<p>I don't understand your last post. I have a Sensenich 68" pin adjustable prop on my 350is.</p>
<p>I don't understand your last post. I have a Sensenich 68" pin adjustable prop on my 350is.</p> Looks like Sensenich isn't go…tag:zenith.aero,2020-10-09:2606393:Comment:7473422020-10-09T00:45:54.006ZDavid J. Beaulieuhttps://zenith.aero/profile/DavidJBeaulieu
<p>Looks like Sensenich isn't going to go through the effort of designing and making blades for the 350is compatible with their pin system for blade pitch adjustment. As a result of hearing that info, along with no known issues reported with the UL350iS and WhirlWind props, I elected to purchase the Whirlwind 3 blade to see how it performs relative to the Catto. As much as I would prefer the simplicity of changing pitch via the pin system, I found that setting pitch on the WhirlWind was…</p>
<p>Looks like Sensenich isn't going to go through the effort of designing and making blades for the 350is compatible with their pin system for blade pitch adjustment. As a result of hearing that info, along with no known issues reported with the UL350iS and WhirlWind props, I elected to purchase the Whirlwind 3 blade to see how it performs relative to the Catto. As much as I would prefer the simplicity of changing pitch via the pin system, I found that setting pitch on the WhirlWind was straight forward and not terribly time consuming as I had imagined. At listed price of $2450, it seemed like a good choice. </p> I ask Airmaster for the curre…tag:zenith.aero,2020-10-08:2606393:Comment:7469992020-10-08T15:10:41.151ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<p><span>I ask Airmaster for the current price of a two blade and three blade system.</span></p>
<p></p>
<p>AP523CTF-SNR70U (two blade Sensenich) USD9800</p>
<p>AP433CTF-WWR66U (three blade Whirlwind ) USD10550</p>
<p><span>I ask Airmaster for the current price of a two blade and three blade system.</span></p>
<p></p>
<p>AP523CTF-SNR70U (two blade Sensenich) USD9800</p>
<p>AP433CTF-WWR66U (three blade Whirlwind ) USD10550</p>