Mejzlik 25-12S and 26-12N 3 blade props.

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branwell · 06-28-2009, 02:42 PM

Hi,

How do the Mejzlik 25-12S and 26-12N three blade props compare performance wise?

Many thanks,

Branwell

pe reivers · 07-01-2009, 02:08 PM

Branwel,
I think not that many people have used both props in comparison.
My preliminary guess is that the S prop puts a 30% larger load than the N-prop.
putting your numbers in my calculator, running both props at 7000 rpm I get 14 hp for the 26x12N and 15.5 hp for the 25x12S.
adjusting for hp, I can see that the 26x12N pulls harder all the way form static to top speed, due to it's larger diameter.
I would need mass distribution data to predict spool-up between the two, but methinks the 26x12 wins.

wylieruneyjr · 07-01-2009, 02:30 PM

The S blades seem to spin pretty quite. Not much noise. My DL 100 spins about 5750 on that prop. Cannot comment on the N blades.

pe reivers · 07-01-2009, 06:30 PM

Something I was hoping to hear.
Because of ground clearance I need a prop that loads the engine quite a bit. In Europe, noise is regulated, so our choices are limited to lower rpm and more pitch. Nobody like a barking prop over here. Enter the three blade tooth picks with large pitch because of this.

cesar781 · 07-01-2009, 07:25 PM

I'm using the 26x12n in my 3w 106 and I like a lot .eather IMAC /3D is very quite and performe very good in speed and slow the plane a lot for short landing I'm going to try in my DA 100L if the weather permits this weekend .both engine is runing stock muffler

06-28-2009, 02:42 PM	#1
branwell Bad-ass Super Contributer! Join Date: May 2006 Location: Northern, Va Age: 48 Posts: 237	Mejzlik 25-12S and 26-12N 3 blade props. Hi, How do the Mejzlik 25-12S and 26-12N three blade props compare performance wise? Many thanks, Branwell

07-01-2009, 02:08 PM	#2
pe reivers Bad-ass Super Contributer! Join Date: Apr 2007 Location: The netherlands Age: 68 Posts: 1,591	Re: Mejzlik 25-12S and 26-12N 3 blade props. Branwel, I think not that many people have used both props in comparison. My preliminary guess is that the S prop puts a 30% larger load than the N-prop. putting your numbers in my calculator, running both props at 7000 rpm I get 14 hp for the 26x12N and 15.5 hp for the 25x12S. adjusting for hp, I can see that the 26x12N pulls harder all the way form static to top speed, due to it's larger diameter. I would need mass distribution data to predict spool-up between the two, but methinks the 26x12 wins. __________________ Best regards, Pe Reivers Dealer for MTW, MVVS, MOKImotor, Mejzlik, Xoar, RCexl www.mvvs.nl www.prme.nl/forum/

07-01-2009, 02:30 PM	#3
wylieruneyjr RUTNBUC Join Date: Sep 2008 Location: McClellanville South Carolina Age: 48 Posts: 1,748	Re: Mejzlik 25-12S and 26-12N 3 blade props. The S blades seem to spin pretty quite. Not much noise. My DL 100 spins about 5750 on that prop. Cannot comment on the N blades.

07-01-2009, 06:30 PM	#4
pe reivers Bad-ass Super Contributer! Join Date: Apr 2007 Location: The netherlands Age: 68 Posts: 1,591	Re: Mejzlik 25-12S and 26-12N 3 blade props. Something I was hoping to hear. Because of ground clearance I need a prop that loads the engine quite a bit. In Europe, noise is regulated, so our choices are limited to lower rpm and more pitch. Nobody like a barking prop over here. Enter the three blade tooth picks with large pitch because of this. __________________ Best regards, Pe Reivers Dealer for MTW, MVVS, MOKImotor, Mejzlik, Xoar, RCexl www.mvvs.nl www.prme.nl/forum/

07-01-2009, 07:25 PM	#5
cesar781 Bad-ass Super Contributer! Join Date: May 2007 Location: Brazil, São Paulo, Jales Posts: 306	Re: Mejzlik 25-12S and 26-12N 3 blade props. I'm using the 26x12n in my 3w 106 and I like a lot .eather IMAC /3D is very quite and performe very good in speed and slow the plane a lot for short landing I'm going to try in my DA 100L if the weather permits this weekend .both engine is runing stock muffler

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