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G38 Props

Old 07-17-2005, 09:27 PM
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RustyTumbles
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Default G38 Props

I have a Zenoah G38 with a slimline muffler. It currently turns a APC 18x8 Wide blade at 8300rpm. I would like to get a little more verticle out of my extra without gaining anymore speed. I have recently tried a bolly carbon 19x6 but the revs on the motor rose to over 8800rpm and the plane flew way to slow. I was thinking of going to a bolly wood 20x8 or an APC 20x8. Is this to much prop for the engine? What other props do you recomend?
Old 07-17-2005, 10:19 PM
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w8ye
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Default RE: G38 Props

A 20 X 8 will cut your current rpms considerably. The G 38 likes it around 8,000 rpm
Old 07-17-2005, 11:48 PM
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Default RE: G38 Props

So a 19x8 would be ok?
Old 07-18-2005, 07:00 AM
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w8ye
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Default RE: G38 Props

If you can find one?

Enjoy,

Jim
Old 08-09-2005, 05:41 PM
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AnthonyH
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Default RE: G38 Props

I have an APC 19x8W that I just got. I will give it a try tonight and let you know the results.
Old 08-10-2005, 02:08 AM
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Default RE: G38 Props

Cool thanks. Where did you get the prop from? I can't find apc 19x8 props anywhere.....
Old 08-10-2005, 04:22 AM
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jbflier
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Default RE: G38 Props

If you can't find it at Tower, go to www.apcprop.com..............;)
Old 08-10-2005, 04:57 AM
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Default RE: G38 Props

Cool thanks heaps!!!!
Old 08-10-2005, 10:56 AM
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Default RE: G38 Props

I had my LHS order it for me. It is not a size that he normally stocks. I did not get a chance to run it last night. I should tonight though.
Old 08-15-2005, 08:50 AM
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Default RE: G38 Props

I flew the Spacewalker with the G38 and the APC 19x8W prop and boy did it make a difference over the ProZinger 18x8. Engine ran good in 95 deg. heat. Prop provided great thrust and good downline breaking. I was able to do big loops from level flight without problem. Stall turns had great vertical. I would like to try a 20x8 Menz S to see how it performs, but I am really happy with the APC. I did not tach it so I do not know what it was turning, but the difference over the ProZinger was amazing, it was like flying a different plane.
Old 08-15-2005, 01:13 PM
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Default RE: G38 Props

Zinger props are have horrible efficiency and a horrible reputation. Only a fool would run such a substandard prop....

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