Viking - Engine Offset - To have it or Not to have it... - Zenith Aircraft Builders and Flyers2024-03-28T11:15:45Zhttps://zenith.aero/forum/topics/viking-engine-offset-to-have-it-or-not-to-have-it?commentId=2606393%3AComment%3A627230&x=1&feed=yes&xn_auth=noI am installing the Viking 18…tag:zenith.aero,2018-05-13:2606393:Comment:6272302018-05-13T02:15:51.504ZEric Johnsonhttps://zenith.aero/profile/EricJohnson97
<p>I am installing the Viking 180 HP engine in a CH801. I went by the factory's recommendation and designed my engine mount with about 2.5 degrees of offset. It will be a while before I get this plane in the air to test it, but I figured that a plane with this much power should take P-factor into consideration. Even my 110 HP Tomahawk has the engine offset. I designed my own engine mount, using Jan's mount as a pattern, and built a fixture so it would precisely fit my firewall. I took some…</p>
<p>I am installing the Viking 180 HP engine in a CH801. I went by the factory's recommendation and designed my engine mount with about 2.5 degrees of offset. It will be a while before I get this plane in the air to test it, but I figured that a plane with this much power should take P-factor into consideration. Even my 110 HP Tomahawk has the engine offset. I designed my own engine mount, using Jan's mount as a pattern, and built a fixture so it would precisely fit my firewall. I took some measurements of the Tomahawk's mount, to get an idea of how much the engine is shifted to the left, and tilted to the right, then compared to my fixture. Zenith planes have pretty large rudders, and have a good reputation for cross wind landings, at least from what I have read, so maybe offset isn't that critical. As long as the factory recommends 2 to 3 degrees offset, I decided to go with their advice.</p>