Spinner and Prop Size
02-10-2005, 08:55 PM
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Spinner and Prop Size
If I have a large spinner on an aircraft say 3 inch spinner with an 11 inch prop, if I subtract the 3 inches from the 11 inches am I in fact ending up with an 8 inch prop? Does this unload the prop? would if be ok to use a larger prop than is recommended for the engine in use? Hope this makes sense.
Thanks Ian
Thanks Ian
02-10-2005, 11:28 PM
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RE: Spinner and Prop Size
Really depends on the size engine. If it's a .40 size, there's not much margin to increase prop diameter over 11 inches. The spinner will actually help, as it smooths the turbulent airflow over the front of the plane and reduces some of the drag , and allows the prop to operate a bit more efficiently. As stated above, the innermost inch or two at the prop hub doesn't do much, the outer half of the blades do most of the work, regardless of diameter.
02-11-2005, 08:00 AM
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RE: Spinner and Prop Size
Traditionally you would use a spinner that is about 20% to 25% of the diameter of the prop.......
but you can use other sizes depending on your application
for me a 3" spinner for an 11" prop seems a bit big, but if it works.....go with it
but you can use other sizes depending on your application
for me a 3" spinner for an 11" prop seems a bit big, but if it works.....go with it
02-11-2005, 03:35 PM
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RE: Spinner and Prop Size
If I have a large spinner on an aircraft say 3 inch spinner with an 11 inch prop, if I subtract the 3 inches from the 11 inches am I in fact ending up with an 8 inch prop?
