Zenoah G-45 prop combination  
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Zenoah G-45 prop combination - 2/27/2003 11:16:16 PM   
Cacahuete


 

Posts: 12
Joined: 2/26/2003
From: Bogota, COLOMBIA
Status: offline 		Zenoh g-45 in a a Midwest Extra. Modified original muffler.
Currently I am using a MA 18X10 turning 6600rpm.
What is the bes prop for this combination?
I fly out of a 8355 feet elevation field.

Also what Rpm are you getting ?
       Post #: 1

Zenoah G-45 prop combination - 2/28/2003 7:02:01 AM   
Geistware



Posts: 12946
Joined: 4/9/2002
From: Locust Grove, GA, USA
Status: offline 		Try a Zinger 20*08 you should get around 8000rpm

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(in reply to Cacahuete)
       Post #: 2

Zenoah G-45 prop combination - 2/28/2003 7:41:15 PM   
Cacahuete


 

Posts: 12
Joined: 2/26/2003
From: Bogota, COLOMBIA
Status: offline 		Thanks Geistware,
Zinger has 2 diferent props, the regular one and the pro.
Which is the one with more pull?

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       Post #: 3

Zinger props - 2/28/2003 7:53:09 PM   
Hobbsy



Posts: 10426
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Cac, my G45 turns the 18x10 Pro Zinger at 9,000 even, but only turns the regular Zinger 20x8 at about 7,200, my Mustang 50/Fuji 50 turns both at about 100 rpm faster and my MDS 2.18 edges them both out with the Pro by about 200 rpm with only about 45 minutes run time on it. I'm looking for 9,500 to 9,600 from the MDS after another hour or so.

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Zenoah G-45 prop combination - 2/28/2003 8:00:22 PM   
Geistware



Posts: 12946
Joined: 4/9/2002
From: Locust Grove, GA, USA
Status: offline 		The pro will give you more pull because it puts less load on the engine. This will give you more RPM and more thrust.

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Aircraft Proving Grounds
http://www.rcaircraft.net/
Information on the building and flying of Radio Control Aircraft.
Site for hobbyist in the R.C. Aircraft modeling world.

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       Post #: 5

Zenoah G-45 prop combination - 2/28/2003 10:08:53 PM   
Cacahuete


 

Posts: 12
Joined: 2/26/2003
From: Bogota, COLOMBIA
Status: offline 		How about Menz, APC or theMejzlik has anyone tried them out?
How about going 20X8 or 20X10?

(in reply to Cacahuete)
       Post #: 6

Zenoah G-45 prop combination - 3/1/2003 12:53:25 AM   
Geistware



Posts: 12946
Joined: 4/9/2002
From: Locust Grove, GA, USA
Status: offline 		I have tried a 19x12 on that engine. It had strong vertical on a MW Extra but not unlimited. I found that at higher RPM's it was very noisy. Maybe a 21x8 NX would be good.

_____________________________

Aircraft Proving Grounds
http://www.rcaircraft.net/
Information on the building and flying of Radio Control Aircraft.
Site for hobbyist in the R.C. Aircraft modeling world.

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       Post #: 7

Zenoah G-45 prop combination - 3/1/2003 3:19:05 AM   
karolh


 

Posts: 2149
Joined: 5/15/2002
From: Mandeville, JAMAICA
Status: offline 		My MW Extra with a G45 on a standard Zinger 20x8 with a Bennett's twin stack muffler on 32:1 gasoline turns at 7,800 at an elevation of 2,700 ft. What is the flying weight of your plane less fuel.

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       Post #: 8

Zenoah G-45 prop combination - 3/2/2003 1:18:23 AM   
Cacahuete


 

Posts: 12
Joined: 2/26/2003
From: Bogota, COLOMBIA
Status: offline 		19 pounds with fully sheeted wings and stab.
Is anyone getting unlimited vertical with the Extra/G45 combination?

(in reply to Cacahuete)
       Post #: 9

Zenoah G-45 prop combination - 3/2/2003 7:42:48 AM   
Joe Kelley


 

Posts: 3595
Joined: 8/11/2002
From: North Hollywood, CA, USA
Status: offline 		I like the 20-10 Ultra,


HTH

Joe

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       Post #: 10

G45 - 3/2/2003 9:20:40 AM   
JohnnyJ


 

Posts: 298
Joined: 1/26/2002
From: Ponoka, AB,
Status: offline 		Hi,
My G45 has CH ignition on it and a Bisson muffler. I am getting 7100 rpm on a 22x10 Menz ultra and the same on a 22x10 Bolly. Both performed very well, however the Bolly was noisier.
I get nearly unlimited performance on a 19 lb Byron Christen Eagle.
A 22x8 Menz S turned 7200 and did not fly as well as the 22x10 props.
I picked up 3-400 rpm when I went to Amsoil series 2000 at 50-1 mix.
I'm at 2700 ft ASL.
Mike Billington's engine review in MAN October 1996 indicates max power (torque) is in the 6600 to 6800 range.
I like to prop my engines for static rpm at or slightly above the max torque range.
Torque(power) is the tangible output of an engine at any given time.
Horsepower is solely the mathematical summation of that torque release against time!
John

(in reply to Cacahuete)
       Post #: 11

Zenoah G-45 prop combination - 3/3/2003 7:01:28 AM   
Cacahuete


 

Posts: 12
Joined: 2/26/2003
From: Bogota, COLOMBIA
Status: offline 		Tony Clark is the oficial importer of Zenoah engines in Germany.
You can read his recomendations on engine/prop combination on his web page. He also has some very interesting accesories.

http://www.toni-clark.com/index_en.htm

It is similar to what Johnny has.

(in reply to Cacahuete)
       Post #: 12

Zenoah G-45 prop combination - 3/3/2003 8:11:07 AM   
karolh


 

Posts: 2149
Joined: 5/15/2002
From: Mandeville, JAMAICA
Status: offline 		My MW Extra/G45 combo weighs 17.75 lbs and has just about unlimited vertical. I purchased a Menz 20x10 which many say is the best prop for this engine but the blade is so wide at the hub I have not gotten around to enlarging the cutouts in the aluminium spinner yet. Maybe one of these days.

(in reply to Cacahuete)
       Post #: 13

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