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YS 160DZ Prop?

Old 02-27-2006, 11:01 PM
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yepe
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Default YS 160DZ Prop?

Guys, whats the best propeller for pattern flying on my YS 160dz. I'm using cool power 15% and flying it tropical climate around 90 to 100 degress F. I got an APC 4 bladed prop 15.5x12 and 2 blade 17x10. Any suggestions. Thanks
Old 02-28-2006, 12:10 AM
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riot3d
 
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Default RE: YS 160DZ Prop?

I have been using 17 x 12 w with great results. However, you might want to try that 17 x 10, or a 17 x 12 because of your high temp and humidity. A 16.5 x 12 w will be a good prop also.
Old 02-28-2006, 12:20 AM
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Troy Newman
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Default RE: YS 160DZ Prop?

On that nitro level I would turn a smaller prop. The 4blade will be way too much load on that nitro.

The 17-10 will likely be a little light on the load. But try it.

I used the 17-12 std and the 17-12W with good results but this was on 30% nitro.

You want to run the motor up in the 8300-8600 rpm range. I would say the lesser nitro the higher the RPMS you need to run.

I would prop it up in the 8600-8800 range with 15% nitro. A 16.5-12W or 16-13 would be really good.

The reason for the higher RPM is the motor is not laboring to produce power. Lower nitro narrows the needle setting and you have to be more precise in how the motor is setup. More nitro gives a much much broader range for the settings. So being that the settings become more critical with lower nitro the key is to turn higher RPMS with it. More nitro also means that the engine setting are richer. The richer the setting the more fuel and hence the more oil you are running through it. More oil means cooler. This means you get more power and the engine runs cooler. I understand that higher nitro fuels are very expensive and reality is they are not needed. Just don't try to run the same prop as a guy on 30% nitro. Don't work well.

Don't worry a 15 or 16inch prop turning these rpms is not going to be really loud. I know many pilots in europe and Asian countries use less nitro and smaller props than we use here in the USA.

When you prop the motor correctly it will make excellent power.

My guess is try the 17-10 standard and see where it stands. If its around 9000 then you need a bit more load. 16's are the best place for this as I know APC doesn't make a 17-11 and the 17-12 is too much on 15% so the 18's that some run will be too much too. Go back to the 16's and you be the best off.

Troy Newman
Old 02-28-2006, 05:27 AM
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yepe
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Default RE: YS 160DZ Prop?

Thanks for the advice.
Old 02-28-2006, 08:57 PM
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DLEVETT
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Default RE: YS 160DZ Prop?

Hi Guys, can anybody tell me what size of prop is optimal if using this motor in a 11lb 2m Katana? I,m thinking 18x8wAPC or a 19x8Mej. 30% fuel. Any body have any thoughts or experience.

thx Dave
Old 02-28-2006, 09:48 PM
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Default RE: YS 160DZ Prop?

Anyone try the Biela 16x10 3 blade on the DZ1.60 yet?
Old 02-28-2006, 09:51 PM
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Troy Newman
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Default RE: YS 160DZ Prop?

In a 3D application the best results will come from a higher RPM. I would stick up around 8600-8800.

I know I harp on this point but I truly feel this is where most people don't get the most out their YS motor. Remember this is a 4 stroke motor. It has timing associated with it. This timing is optimized for a specific RPM range and run the motor there and you will be super happy. Load it up and you will especially in a 3D application be eating parts. In hover and such maneuver the load on the cam gear and the crank is tremendous. Don't make the engine work harder than it has too. The YS 160DZ is a perfect engine for this type of model but don't get too big a prop on it.


I would say the 18-8W looks good although I have never run it. Check your RPM and see where you stand. Basically in a 3D application you want the motor to spool up and down as fast as possible. This means the lowest load possible on the motor. If the prop only turns 8000rpm then the motor will make good power but will be running pretty hard the result is the throttle response will not be as good as it can be.

This motor is designed around pattern flying and in pattern flying the motor can spool up and spool down. In 3D this doesn't work as well.

So the secret is to let it rap up a little higher RPM than the pattern setup. The 160DZ is the best choice in my opinion for the task you are using it...but remember how it works and you will be very happy. Try to run a prop that Joe says is the best may or may not be the best for you.

By the way running at the higher end of the RPM band for these motors is the best on them. You don't want the 160 to break 9000rpm but up near there will be excellent performance.

I have a huge amount of experience with the DZ motors and this is the way I would run it.

Troy Newman
YS Performance
Old 02-28-2006, 10:07 PM
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Default RE: YS 160DZ Prop?

Troy,

I think I was getting around 8300 on the 18x8w with my 140DZ. The engine seemed happy with this prop for pattern and hovering/torque rolling. It gave tremendous tractor like pull on vertical, much more so than a 16.5x12w. Both of these props with 30% Cool Power Heli.

David
Old 02-28-2006, 10:24 PM
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Troy Newman
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Default RE: YS 160DZ Prop?

Ok cool so the 18-8W will put out about 8600+ on the 160DZ.

Should be a good choice for 3D. I would look to this as a comparison. As I have said I don't have the 18-8W and have never run it. But I will get one and stick it on my Flashdance next chance I get.

I have been using the 17-12 and its OK for TR's but not the easiest prop to do it. I just prefer doing things where the model actually flies. I like flying some 3D stuff but reality is I don't like taking the risk with my model. I would much better prefer doing things like low rollers, rolling loops, and other flying stuff rather than flippity flop.

Foamies are great for flippity flop because they do it so well.

Troy
Old 03-01-2006, 04:44 AM
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Default RE: YS 160DZ Prop?

Hi
In WC 2005 in St Yan, CPLR did 3D flight (at the end of fly off) with his Oxalys and use a APC 17x12 on 170 Dingo.
Regards
Old 03-01-2006, 07:41 PM
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Default RE: YS 160DZ Prop?

Thanks for the info guys, I,m going to go with a 18x8w apc to start and then see if I,m getting to high in rpm,s I,ll try a 19x8. I here you Troy about keeping the rev,s up as the spool up with be quicker and I won,t be overworking to motor. Once i,ve had a chance to run with these props I.ll post my results. thx Dave

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