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prop size for saito 72

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prop size for saito 72

Old 05-28-2015, 06:52 PM
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my05monte
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Default prop size for saito 72

I'm putting a 72 4stroke saito on a Sig 4star 64. Has anyone used this and what size prop would be good for "puttin" around?
Old 05-28-2015, 07:07 PM
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I don't have exactly that, but I do have a Sig 4 Star 60 with an OS 70. I like it with an APC 14x4. It's not fast with that prop, but fast enough for me, and the vertical is very good; landings are not floaty at all.

Jim
Old 05-28-2015, 07:33 PM
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Jason Gross
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13x6 is my go to prop for the 70ish sized four strokes.
Old 05-29-2015, 04:45 PM
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Either the 13 or 14 inch. The pitch is up to you and found by prop testing.
Old 05-30-2015, 06:55 AM
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13x6 APC is the benchmark on a Saito 72. 14x4W is better for 3D.

David
Old 05-30-2015, 07:00 AM
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My 4 Star 60 is not a 3D plane, but I like the 14x4 and do not get "floating" on landing that many complain about with that model.

The 13x6 and 14x4 put very similar loads on the engine in the right rpm range. Best to get one of each and try. Based on "puttin around", I'd guess the 14x4, but only your test will tell.

Jim
Old 05-30-2015, 07:42 AM
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In your web browser, type in saito engine information, a screen will show all the links to what you want to know.

Save that file for future use or print it or click here..http://saito-engines.info/prop_sizes.html

Last edited by FLAPHappy; 05-30-2015 at 07:51 AM. Reason: file did not paste.
Old 05-30-2015, 04:40 PM
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jester_s1
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I'd think a 12x8 would work well. I use a 13x6 on my Cub with that engine. It puts along as a Cub should, but it's not fast. I think you'd want a bit more top end speed for a sport plane, especially on windy days.
Old 06-04-2015, 12:16 PM
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I use a 12x8 or a 13x6 on my OS Surpass ii. A 14x4 also works. All similar loads. Static (richened) ought to get about 10,000 RPM. If it's close, it's good.

PD.

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