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SV-26 prop size ?

Old 04-11-2009, 10:47 PM
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Ed
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Default SV-26 prop size ?

I picked up a SV-26 and it looks to be a very nice engine. Which would be a better choice prop for it, a 16x10, or a 16x8 ? ? ?

Thanks - Ed
Old 04-12-2009, 05:35 AM
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mrbigg
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Default RE: SV-26 prop size ?

Dooley told me to break it in on a 16x8 and then go to an 18x8.
Old 04-12-2009, 06:12 AM
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Default RE: SV-26 prop size ?


ORIGINAL: Ed

I picked up a SV-26 and it looks to be a very nice engine. Which would be a better choice prop for it, a 16x10, or a 16x8 ? ? ?

Thanks - Ed
16X8, 17X6, 18X6
Old 04-12-2009, 06:27 AM
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Default RE: SV-26 prop size ?

Zippi is right on the money and use in that order.

Karol
Old 04-12-2009, 06:35 AM
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Default RE: SV-26 prop size ?

Why the 18x6? That usually spins about the same as a 16x8. I told Mike that I was going to use an 18x6 and he said to use the 18x8 as this engine makes more torque than a G26. Just what I was told by the importer.
Old 04-12-2009, 08:56 AM
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Default RE: SV-26 prop size ?

ORIGINAL: mrbigg

Why the 18x6? That usually spins about the same as a 16x8. I told Mike that I was going to use an 18x6 and he said to use the 18x8 as this engine makes more torque than a G26. Just what I was told by the importer.
The 18X8 is a little to big for a 26cc engine and creates to much of a load on the engine. Ive seen the 18X8 prop used on cowled in engines and in the hot summer months the engine will over heat from to much load on the engine. The props that I mentioned seem to give the best performance. The brand of prop is another whole story. Everyone has their own prop brand they like. I prefer XOAR. IMO I have yet to see a 26cc engine that could out perform a Zenoah G26. The G26 I bought from Ralph Cunningham at RC Ignitions would spin an APC 17X6 at 9700 rpm new right out of the box. That's pretty impresive. There are other 26cc gassers out there that are pretty nice and have good reviews but the Zenoah engines have been around for ever and have proven themselfs to be good dependable long lasting engines.
Old 04-12-2009, 01:43 PM
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Default RE: SV-26 prop size ?

I'm just going by what Mike Dooley of RCS told me. I was ordering props at the same time that I ordered the engine. I was going to get a 16x8 and an 18x6. He told me the the engine likes the 18x8 after break in and not to waste my time with the 18x6. Since he was the importer/servicer of the engines, I figured that he would know what his engines liked for props.
Old 04-12-2009, 02:57 PM
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Default RE: SV-26 prop size ?

mrbigg,

Well, since your new to gas and I only say that because your asking what size prop to use I would probably do the same thing. Can't blame you there dude. Run that prop and tach it and check the thrust and then do the same with one of the other props mentioned and decide for yourself. It's all about what make's you happy and what puts a smile on your face after a fun day of flying .
Old 04-12-2009, 03:30 PM
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Default RE: SV-26 prop size ?

I'm not new to gas Zippi. Far from it. Actually, my first gas engine was a ZDZ 120 twin. Now I have a ZDZ 160, Super 80, G38, G62, and the SV26. I don't do glow and haven't for a while now. Waste of time and money. I'm not the starter of the thread. Ed is.
Old 04-12-2009, 03:42 PM
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Default RE: SV-26 prop size ?


ORIGINAL: mrbigg

I'm not new to gas Zippi. Far from it. Actually, my first gas engine was a ZDZ 120 twin. Now I have a ZDZ 160, Super 80, G38, G62, and the SV26. I don't do glow and haven't for a while now. Waste of time and money. I'm not the starter of the thread. Ed is.
I stand corrected. What I'm trying to get across to Ed is, if you like how it runs and your happy then have fun with it. There are so many combinations and opinons, you just have to experence it for yourself to see how thing work out the best. Not everyone tunes a gas engine the same.
Old 04-12-2009, 05:03 PM
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Default RE: SV-26 prop size ?

I hear ya. I'll let you know how mine runs with both props. The way it's going, that probaly won't be until fall.[:@]
Old 04-12-2009, 08:20 PM
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Default RE: SV-26 prop size ?

Maybe the thinking was of using of an APC 18x8N prop, but in the real scheme of things and using a standard size prop, I think you will find as Zippy alluded to that any quality 18x8 such as a NX, Xoar, Menz or similar will be too much prop for your engine.

Karol
Old 04-12-2009, 08:29 PM
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Default RE: SV-26 prop size ?

" I told Mike that I was going to use an 18x6 and he said to use the 18x8 as this engine makes more torque than a G26. "

Thanks mrbigg, excellent information. Mr. Dooley sounds like he knows his product best, and I will go with the 18x8.

" More torque then the G-26. " Excellent !

.Ed
Old 04-13-2009, 05:58 AM
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Default RE: SV-26 prop size ?


ORIGINAL: karolh

Maybe the thinking was of using of an APC 18x8N prop, but in the real scheme of things and using a standard size prop, I think you will find as Zippy alluded to that any quality 18x8 such as a NX, Xoar, Menz or similar will be too much prop for your engine.

Karol
Nope, he was recommending Bambula props. They put way more load on an engine than an APC or other brands. We were dicussing this engines torque characteristics in another thread.
Old 04-13-2009, 01:02 PM
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Default RE: SV-26 prop size ?

Well you live and you learn, as I never though there was another non piped 26cc around that could outpull a G26, because an 18x8 is a bit too much prop for it.

Karol
Old 04-13-2009, 01:31 PM
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Default RE: SV-26 prop size ?

We'll see if the Zenoah is up to the SV.[sm=lol.gif] I'm just going by what he said. I know the Zenoah doesn't make any power down low. You have to rev the snot of the G26. I'll let you know what I find out.
Old 04-16-2009, 09:07 PM
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Ed
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Default RE: SV-26 prop size ?

"I'm just going by what Mike Dooley of RCS told me. I was ordering props at the same time that I ordered the engine. I was going to get a 16x8 and an 18x6. He told me the the engine likes the 18x8 " - mrbigg

Sounds like the SV-26 develops it's maximum torque at a bit lower RPM then a G-26. And so, I will be trying Mikes suggested 18x8.

Ed
Old 09-09-2014, 05:37 PM
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I have a pair of the SV-26's, also bought from Troy Built. Has anyone out there tried the 3-blade Master Airscrew props with this engine already? I bought a variety of different sizes to try out on the test stand, including a 14 x 7, 14 x 9, 15 x 7, 16 x 8 and a 16 x 10. Will wait and see what prop matches up best with the SV-26's.

Jeff

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