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3 BLADE PROP FOR GT80 - 1/16/2013 5:34 AM   
casinovegas



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From: Rolling Meadows, IL, USA
Status: offline 		I need to put a 3 Blade prop on my Zenoah GT80 for my Helcat can anyone please help me with some type size and pitch and what kind of prop you used I cant find this info anywhere
Thanks for your help Fred

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RE: 3 BLADE PROP FOR GT80 - 1/16/2013 1:58 PM   
samparfitt


 

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From: West Chester, OH, USA
Status: offline 		Fred,
I tried a Mejzlik 22X12 3-blade and only got 5500-5800 rpms so you'll probably have to use either a 20X12 or a 22X10 3-blade to get above 6000 rpm's (my 'magic number of 6000 that I use before I'm comfortable with getting 'flying speed' for gas engines).
You can also trim the tips down (usually, not more than a 1/2"), and re-balance, to get more rpm's.
Presently, I'm using a 2 blade as my plane is pretty heavy (low-mid 40's).


build thread:
http://www.rcuniverse.com/forum/m_10066751/mpage_8/key_/tm.htm

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RE: 3 BLADE PROP FOR GT80 - 1/16/2013 2:33 PM   
mikes68charger


 

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Status: offline 		IF thats the case the Morepower adjustble 3 blade may be your ticket.

Its  a 20in 3 blade but is adjustable from 10,12,14 pich.

My DLE55RA turns it around 7200rpms at 10,

I put one on my ZDZ80 Super and was getting 7400 at 12 pich and 6400-6200 at 14pich.

Good Luck



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RE: 3 BLADE PROP FOR GT80 - 1/16/2013 5:05 PM   
Rebel Flyer



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From: Minneapolis, MN, USA
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quote:

ORIGINAL: samparfitt

Fred,
I tried a Mejzlik 22X12 3-blade and only got 5500-5800 rpms so you'll probably have to use either a 20X12 or a 22X10 3-blade to get above 6000 rpm's (my 'magic number of 6000 that I use before I'm comfortable with getting 'flying speed' for gas engines).
You can also trim the tips down (usually, not more than a 1/2''), and re-balance, to get more rpm's.
Presently, I'm using a 2 blade as my plane is pretty heavy (low-mid 40's).


build thread:
http://www.rcuniverse.com/forum/m_10066751/mpage_8/key_/tm.htm




There is a big difference between a ZDZ-80 and a Zenoa-80. Main thing to remember is that a Zenoa 80 in stock configuation, Is not that much more power than a g-62.
You could swing that prop if it was on alcohol.
With a 22-12, it will be a slug. Which is fine if it was an SBD, or thats what you wanted.
I know Sam knows what he is talking about...

22-10 on the Hellcat.

Rebel

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RE: 3 BLADE PROP FOR GT80 - 1/16/2013 6:34 PM   
dadragon


 

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From: pine bluffs, WY, USA
Status: offline 		the 80 swings a 24-10 two blade to get 7200 when going to a milti blade drop down 2" and keep the pitch or drop down 1" and lessin the pitch,remember on 2 strokes keep the RPM up they dont lug worth a crap.

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RE: 3 BLADE PROP FOR GT80 - 1/16/2013 7:35 PM   
kwik



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From: kongsberg, NORWAY
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quote:

ORIGINAL: dadragon

the 80 swings a 24-10 two blade to get 7200 when going to a milti blade drop down 2'' and keep the pitch or drop down 1'' and lessin the pitch,remember on 2 strokes keep the RPM up they dont lug worth a crap.


7200 with a 24x10 2-blade on a Zenoah GT-80 ?

I get 5700 rpm with a Menz Standard 24x10. Standard Mufflers.

Please tell me how to get 7200 rpm, and I will reward you generously!

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RE: 3 BLADE PROP FOR GT80 - 1/16/2013 10:57 PM   
STUKA BARRY


 

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From: Summerfield, NC, USA
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quote:

ORIGINAL: kwik


quote:

ORIGINAL: dadragon

the 80 swings a 24-10 two blade to get 7200 when going to a milti blade drop down 2'' and keep the pitch or drop down 1'' and lessin the pitch,remember on 2 strokes keep the RPM up they dont lug worth a crap.


7200 with a 24x10 2-blade on a Zenoah GT-80 ?

I get 5700 rpm with a Menz Standard 24x10. Standard Mufflers.

Please tell me how to get 7200 rpm, and I will reward you generously!

I'm swingin a Xoar WWI Simitar which is'nt exactly efficient at 6800 and pulls my 1/3 scale 32lbs. WWI Fokker D-VIII like its a WWI fighter. I'd like to see what a Mezjlik 24X10 would do. I'll bet a 24X8 Mezjlik three blade would haul that Hellcat.

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RE: 3 BLADE PROP FOR GT80 - 1/17/2013 2:10 AM   
mikes68charger


 

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Status: offline 		Ok then some say a G62 is on par or a little stronger than a DLE55 so I would say you would love this 20X10 3 blade as Im getting around 7200rpms

This will haul my 18 pound corsair around like crazy, and even getts a little prop rip at wot.

I was going to run the same set up in my TopFlite Gaint P47 but I got the ZdZ 80 so I could run a 22X10 4 blade prop.

Mike

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