[NSRCA-discussion] Prop for 1.40 DZ??

[Adam Glatt]

I went through the phase of running big props on the 140DZ.  I then 
switched to smaller props and liked them more.  Try a 15.5x12W and let 
it rev (8600-8900).  No, it won't make noise, but I don't think a 140DZ 
has ever made noise without cheating or limiting throttle travel.
-Adam

Troy A. Newman wrote:
> Matt,
>  
> the 17-12W is way too much prop for a 140DZ
>  
> Run the engine between 8200-8500 and you will get the best performance 
> from it. On the 140DZ's Insane power is 16-12. The 16.5-12W is also 
> good if you are getting a little too loud. The 17-10 standard might be 
> good, but a bit loud. I would look at the 16inch props.  The 17-12's 
> will pull the RPMS down too low and below 8000rpm. this loads the 
> engine too much its designed to run at higher rpm over 8000...you want 
> to be over 8200 for sure.
>  
> I know guys run the bigger props and don't have trouble but usually 
> they complain it doesn't have the power they want. Then they stick a  
> good prop on it and it goes like stink.
>  
> Depending on the fuel you have chosen to run the  prop will vary. If 
> you are running 30% Heli then you might get away with a 17-12 regular. 
> the 17-12W is a bit more load and I only have used this on the 160dz. 
> If you are trying to run some 20% nitro you need to really back off on 
> the prop. Follow the rule of RPM above and keep the engine happy in 
> the 8200-8600 range and it will not only run better with more 
> performance but it will live longer too.
>  
> The 18-10s are the same way. These are a bit too much load on the 
> 140DZ to get the good power. The engine is setup to run at a certain 
> RPM. If you run it there it will be equal power to the 2 stroke 140's 
> and in most cases more. If you try to load it down to 7700 like guys 
> do to the 2 strokes you will not keep up. As far as power pulling the 
> model in the air the DZ will have more if you run it at the right RPM. 
> 4 stoke vs 2 stroke is a different gear in the car. Run the engine at 
> the right RPM and it will make more than you need even for a heavier 
> model.
>  
> troy Newman
>
>     ----- Original Message -----
>     *From:* Matthew Frederick <mailto:mjfrederick at cox.net>
>     *To:* nsrca-discussion at lists.nsrca.org
>     <mailto:nsrca-discussion at lists.nsrca.org>
>     *Sent:* Monday, March 12, 2007 7:49 AM
>     *Subject:* [NSRCA-discussion] Prop for 1.40 DZ??
>
>     I'm currently running a 17x12W on my 1.40DZ but I'm not getting
>     the vertical performance I would like. I was wondering what prop
>     size I should try? I've considered an 18x10. Any thoughts?
>
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