Question PA-28-181 Engine Thrust Angle

  • Brendan O'Rourke
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03 Aug 2023 18:04 #4052 by Brendan O'Rourke
Replied by Brendan O'Rourke on topic PA-28-181 Engine Thrust Angle
With the plane leveled and measuring as carefully a practical it appears the thrust line is about 4 deg down and about 3 deg right...I say 'about' because I was measuring to the prop tips which of course are pitched. At any rate nothing jumps out as being an issue.

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  • Kent Dellenbusch
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13 Jul 2023 16:43 #4008 by Kent Dellenbusch
Replied by Kent Dellenbusch on topic PA-28-181 Engine Thrust Angle
When all is said and done please let us know if this corrected your issue.
 

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13 Jul 2023 16:32 #4007 by Brendan O'Rourke
Replied by Brendan O'Rourke on topic PA-28-181 Engine Thrust Angle
4 degrees down and 3 degrees right is what I need. Thx and have a great AirVenture.

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  • Kent Dellenbusch
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13 Jul 2023 05:59 - 13 Jul 2023 05:59 #4006 by Kent Dellenbusch
Replied by Kent Dellenbusch on topic PA-28-181 Engine Thrust Angle
Hey Brendan,
A response from Piper.  Kent,The tech that sent the drawing to me said the engine mount is offset 3 degrees to the right. Will that be sufficient ?.
Last edit: 13 Jul 2023 05:59 by Kent Dellenbusch.

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12 Jul 2023 18:27 #4005 by Kent Dellenbusch
Replied by Kent Dellenbusch on topic PA-28-181 Engine Thrust Angle
Thank you for this in-depth analysis. I'm sure we'll get the birds-eye schematic and you can proceed with your investigation. I, and many others, will be interested to see what you find out.

 

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12 Jul 2023 18:02 #4004 by Brendan O'Rourke
Replied by Brendan O'Rourke on topic PA-28-181 Engine Thrust Angle
Long story. My airplane flies slightly left wing low with the ball centered* and will turn left without constant right yoke pressure. I've checked and adjusted every control surface, cable tension, nose wheel alignment, rudder, etc. according to service manual, no joy. I even leveled the airplane and measured half a dozen points on the wings and stabilator with a laser transit to see if anything was out of alignment; no smoking gun, all measurements were quite symmetrical. *The ball is centered when the plane is leveled on the ground. The engine was inspected for prop strike and the prop replace 600 hours before I bought it; if there was any airframe damage it wasn't logged and there is no visible signs. Wondering if the engine mount was tweaked and there's more/less side thrust than normal, however, prop, spinner, and cowl all visually look to align properly.

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