Carbon Fiber Cowling for my ULPower 350is powered STOL CH-750 - Zenith Aircraft Builders and Flyers2024-03-28T14:05:00Zhttps://zenith.aero/forum/topics/carbon-fiber-cowling-for-my-ulpower-350is-powered-stol-ch-750-1?commentId=2606393%3AComment%3A873429&feed=yes&xn_auth=noThe stock tube coming out o…tag:zenith.aero,2022-07-09:2606393:Comment:8735122022-07-09T02:23:29.427ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10631416884?profile=original" rel="noopener" target="_blank"><img class="align-center" src="https://storage.ning.com/topology/rest/1.0/file/get/10631416884?profile=RESIZE_710x" width="500"></img></a></p>
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<p>The stock tube coming out of the muffler doesn't fit on this cowling. it touches the bottom of cowling before the bend with the left side of the cowling hanging down, nor is it long enough to exit the cowling immediately either.. So, I'm going to have to get a new one made. Probably out of polished Stainless. :-) Time to call Ray or Robert…</p>
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10631416884?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10631416884?profile=RESIZE_710x" width="500" class="align-center"/></a></p>
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<p>The stock tube coming out of the muffler doesn't fit on this cowling. it touches the bottom of cowling before the bend with the left side of the cowling hanging down, nor is it long enough to exit the cowling immediately either.. So, I'm going to have to get a new one made. Probably out of polished Stainless. :-) Time to call Ray or Robert to find out the correct size and material. My guess is that it's 1.75" 16 gauge 304 stainless steel. Or it could be that fancy metric 44.45mm by 1.5mm steel tubing. I think this will be a whole lot easier than cutting into the cowling. I don't think flipping the tube around the other way makes sense.</p>
<p></p> Now I have some space betwe…tag:zenith.aero,2022-07-07:2606393:Comment:8734722022-07-07T02:47:42.895ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
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<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627408286?profile=original" rel="noopener" target="_blank"><img class="align-center" id="img229723" name="img229723" src="https://storage.ning.com/topology/rest/1.0/file/get/10627408286?profile=original" width="500"></img></a></p>
<p>Now I have some space between the oil cooler and the oil pump. I rounded the oil cooler's top front mounting bracket, that helped to make more clearance too. If I want more clearance I'm going to have to cut the inlet out and move it forward a bit. But not too far, I don't want the propeller to bump into…</p>
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<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627408286?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627408286?profile=original" width="500" class="align-center" id="img229723" name="img229723"/></a></p>
<p>Now I have some space between the oil cooler and the oil pump. I rounded the oil cooler's top front mounting bracket, that helped to make more clearance too. If I want more clearance I'm going to have to cut the inlet out and move it forward a bit. But not too far, I don't want the propeller to bump into it.</p>
</div> The oil cooler fits pretty t…tag:zenith.aero,2022-07-07:2606393:Comment:8735512022-07-07T02:38:48.009ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<div><p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627404480?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627404480?profile=original" width="500" class="align-center" id="img539065" name="img539065"/></a></p>
<p>The oil cooler fits pretty tight against the inlet now. This isn't necessary ideal. </p>
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<div><p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627404480?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627404480?profile=original" width="500" class="align-center" id="img539065" name="img539065"/></a></p>
<p>The oil cooler fits pretty tight against the inlet now. This isn't necessary ideal. </p>
</div> A friend of mine that recent…tag:zenith.aero,2022-07-07:2606393:Comment:8734292022-07-07T02:32:16.794ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<div><p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627401296?profile=original" rel="noopener" target="_blank"><img class="align-center" id="img541501" name="img541501" src="https://storage.ning.com/topology/rest/1.0/file/get/10627401296?profile=original" width="500"></img></a></p>
<p>A friend of mine that recently completed a Tapanee Pegazair from plans only told me to: <em>Sigh the big sigh, and start cutting. </em>Here's my first round of surgery. His Pegazair cowling had lots of surgery. He started with a RV-8 cowling to fit his Lycoming. Then he had to change the thrust line of the cowling. That required major…</p>
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<div><p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627401296?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627401296?profile=original" width="500" class="align-center" id="img541501" name="img541501"/></a></p>
<p>A friend of mine that recently completed a Tapanee Pegazair from plans only told me to: <em>Sigh the big sigh, and start cutting. </em>Here's my first round of surgery. His Pegazair cowling had lots of surgery. He started with a RV-8 cowling to fit his Lycoming. Then he had to change the thrust line of the cowling. That required major rework.</p>
</div> When I received this cowling…tag:zenith.aero,2022-07-07:2606393:Comment:8734282022-07-07T02:25:06.505ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627388069?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627388069?profile=RESIZE_710x" width="500" class="align-center"/></a></p>
<p>When I received this cowling I thought my Aero Classics oil cooler was going to fit better than the factory oil cooler. Guess again. : - ( There was interference between the top of the oil cooler and the oil pump.</p>
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627388069?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627388069?profile=RESIZE_710x" width="500" class="align-center"/></a></p>
<p>When I received this cowling I thought my Aero Classics oil cooler was going to fit better than the factory oil cooler. Guess again. : - ( There was interference between the top of the oil cooler and the oil pump.</p> The mounting plates for the…tag:zenith.aero,2022-07-07:2606393:Comment:8734272022-07-07T02:21:59.188ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<div><p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627381264?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627381264?profile=original" width="500" class="align-center" id="img655024" name="img655024"/></a></p>
<p>The mounting plates for the quarter turn fasteners provide a lip between the top and bottom halves.</p>
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<div><p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627381264?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627381264?profile=original" width="500" class="align-center" id="img655024" name="img655024"/></a></p>
<p>The mounting plates for the quarter turn fasteners provide a lip between the top and bottom halves.</p>
</div> Trim, Trim, Trim. Eventua…tag:zenith.aero,2022-07-07:2606393:Comment:8733322022-07-07T02:17:52.669ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627330301?profile=original" rel="noopener" target="_blank"><img class="align-center" src="https://storage.ning.com/topology/rest/1.0/file/get/10627330301?profile=RESIZE_710x" width="500"></img></a></p>
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<p>Trim, Trim, Trim. Eventually it starts to fit. I left some tabs on the corners of the cowling halves to aid in alignment. These tabs were celcoed in to the Skybolt interlocking tabs. The initial holes in the tabs were not the final ones. As I made the top and bottom halves come together there was more adjustments made. I had a center…</p>
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627330301?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627330301?profile=RESIZE_710x" width="500" class="align-center"/></a></p>
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<p>Trim, Trim, Trim. Eventually it starts to fit. I left some tabs on the corners of the cowling halves to aid in alignment. These tabs were celcoed in to the Skybolt interlocking tabs. The initial holes in the tabs were not the final ones. As I made the top and bottom halves come together there was more adjustments made. I had a center line on the top to keep things aligned. On the bottom cowling half has a slot and the nose gear leg kept that half in the correct position.</p> I decided to use Skybolt 1/4…tag:zenith.aero,2022-07-07:2606393:Comment:8733312022-07-07T02:08:56.062ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<div><p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627330660?profile=original" rel="noopener" target="_blank"><img class="align-center" id="img106327" name="img106327" src="https://storage.ning.com/topology/rest/1.0/file/get/10627330660?profile=original" width="500"></img></a></p>
<p>I decided to use Skybolt 1/4 turn fasteners attach the cowling to the fuselage. I did some measuring and determined the <em>Skybolt RV-8 Cowling Complete Kit - Phillips</em> would have enough parts for my Zenith STOL CH-750/ULPower…</p>
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<div><p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627330660?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627330660?profile=original" width="500" class="align-center" id="img106327" name="img106327"/></a></p>
<p>I decided to use Skybolt 1/4 turn fasteners attach the cowling to the fuselage. I did some measuring and determined the <em>Skybolt RV-8 Cowling Complete Kit - Phillips</em> would have enough parts for my Zenith STOL CH-750/ULPower UL-350is.</p>
</div> Let the trimming begin. I a…tag:zenith.aero,2022-07-07:2606393:Comment:8734712022-07-07T02:02:41.428ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627326055?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627326055?profile=RESIZE_710x" width="500" class="align-center"/></a></p>
<p>Let the trimming begin. I added nearly 12 inches. I only need 3 - 4 inches. I didn't want to come up short and have to laminate more length again.</p>
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627326055?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627326055?profile=RESIZE_710x" width="500" class="align-center"/></a></p>
<p>Let the trimming begin. I added nearly 12 inches. I only need 3 - 4 inches. I didn't want to come up short and have to laminate more length again.</p> And a layer on the bottom co…tag:zenith.aero,2022-07-07:2606393:Comment:8734262022-07-07T01:50:50.068ZTimothy Aanerudhttps://zenith.aero/profile/TimothyAanerud
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627321258?profile=original" rel="noopener" target="_blank"><img class="align-center" src="https://storage.ning.com/topology/rest/1.0/file/get/10627321258?profile=RESIZE_710x" width="500"></img></a></p>
<p>And a layer on the bottom cowling half. I'm using Proset epoxy LAM135 medium viscosity and LAM 226 medium speed hardener. There was time for dinner waiting for this stuff to setup inside a heated garage during a Minnesota…</p>
<p><a href="https://storage.ning.com/topology/rest/1.0/file/get/10627321258?profile=original" target="_blank" rel="noopener"><img src="https://storage.ning.com/topology/rest/1.0/file/get/10627321258?profile=RESIZE_710x" width="500" class="align-center"/></a></p>
<p>And a layer on the bottom cowling half. I'm using Proset epoxy LAM135 medium viscosity and LAM 226 medium speed hardener. There was time for dinner waiting for this stuff to setup inside a heated garage during a Minnesota winter.</p>