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Old 04-24-2014, 08:09 PM
  #51  
drac1
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Originally Posted by MTK
Let me suggest that you make your own from an XOAR or Falcon ELECTRIC woody. Shape it like an APC, thin the blades down and sharpen the TE. Then cover it with 3K carbon cloth and epoxy, and bag it. This is a proven working concept that I have used on many props. It sounds like the engine should turn something like a 22x10 or 22 x 12. And BTW, any APC of this size will weigh about 200 grams. The woody-carbon hybrid weighs about 85-90 grams. Juuust a little weight savings.

One of the better props I've made for my GT33 is a 20 1/4 x 12. The engine loves that prop and it is very similar to an APC blade shape. APC's are the best in design.
Hi Matt,

I agree that the new 185 APC may be around 200 grams. The 20.5 X 10, is 35 grams heavier than the 19 X 11 i used on my 170 cdi. A 22" prop less than a 100 grams would be great. 100 grams is a huge amuont of weight to save in a pattern ship.

APC props are an excellent prop. If only they would make them lighter.
Old 04-25-2014, 01:35 AM
  #52  
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Originally Posted by drac1
Hi Matt,

I agree that the new 185 APC may be around 200 grams. The 20.5 X 10, is 35 grams heavier than the 19 X 11 i used on my 170 cdi. A 22" prop less than a 100 grams would be great. 100 grams is a huge amuont of weight to save in a pattern ship.

APC props are an excellent prop. If only they would make them lighter.
Hey Scott?

Those weights for the APC props are amazing. I'm so used to the EL props at 40 grams.. Spoilt lol...

Have you looked to see what Mezjlik have available for the 185? They make some real nice props for both IC and electric.

Cheers,
Jason.
Old 04-25-2014, 04:18 AM
  #53  
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Originally Posted by Jason Arnold
Hey Scott?

Those weights for the APC props are amazing. I'm so used to the EL props at 40 grams.. Spoilt lol...

Have you looked to see what Mezjlik have available for the 185? They make some real nice props for both IC and electric.

Cheers,
Jason.
Hi Jason,

I haven't looked at anything other than APC. It's just what has always been used on YS's, as they are an excellent prop.

It may be worth experimenting.
Old 04-25-2014, 04:20 AM
  #54  
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Originally Posted by MTK
Let me suggest that you make your own from an XOAR or Falcon ELECTRIC woody. Shape it like an APC, thin the blades down and sharpen the TE. Then cover it with 3K carbon cloth and epoxy, and bag it. This is a proven working concept that I have used on many props. It sounds like the engine should turn something like a 22x10 or 22 x 12. And BTW, any APC of this size will weigh about 200 grams. The woody-carbon hybrid weighs about 85-90 grams. Juuust a little weight savings.

One of the better props I've made for my GT33 is a 20 1/4 x 12. The engine loves that prop and it is very similar to an APC blade shape. APC's are the best in design.
Sent you a PM Matt.
Old 04-25-2014, 12:36 PM
  #55  
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Originally Posted by drac1
Sent you a PM Matt.
Scott, PM answered.

Forgot to mention that my 20.25 x 12 carbon-wood hybrid weighs 77 grams. Not quite electric like on weight but fairly close. One thing certain, lighter props definitely fly better reducing plane reaction to higher G stuff. As always, your milage may vary
Old 05-27-2014, 01:01 PM
  #56  
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I just got a 185 and had a very difficult time with break in simply because I followed the instructions in the box. However, 2 turns in not NEAR enough. when you get the new engine go out at least 3 and 1/2 turns to start. Also run at high idle for a very long time-10-12 oz, then increase gradually and run another tank through it. Use at least 20-30 oz of oil rich fuel to break in. I missed or don't see this info posted anywhere.
Old 05-27-2014, 06:40 PM
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Originally Posted by drmike
I just got a 185 and had a very difficult time with break in simply because I followed the instructions in the box. However, 2 turns in not NEAR enough. when you get the new engine go out at least 3 and 1/2 turns to start. Also run at high idle for a very long time-10-12 oz, then increase gradually and run another tank through it. Use at least 20-30 oz of oil rich fuel to break in. I missed or don't see this info posted anywhere.
With my 185cdi's, I started 2 1/2 turns out and ran 1 tank through on the ground and the idle was nice and steady. I then flew and gradually leaned it off over the next few flights. I've ended up at 1-1 5/8 turns out. I used the same oil content that i fly with and have had no problems.


My 185's are about 1/2 turn further out than my 175's.
Old 05-28-2014, 04:02 AM
  #58  
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Drac,
That would be consistent with what I am doing. Mine is the non CDI version so it requires a more open needle. Mine 175 non CDI is about 1 1/2 turns out. With non CDI I recommend the 3 plus turns out to start.
Mike
Old 05-28-2014, 04:15 AM
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With the cdi you can run the engine 1/2 a turn leaner. I ran my 175cdi with a glow plug and had to open the needle 1/2 a turn.
Old 05-28-2014, 04:50 AM
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sounds good.
Old 03-26-2015, 11:09 AM
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Hi Guys, I'm new to these forums so please be patient. I have just installed a YS185 in an Asyuler. Is the regulator setting correct out of the box. Out of the box screw is level with outer case.1/4 past 9 . On this setting with needle valve 2 turns out engine revs picks up to about half throttle then starts running rough and won't pick up further RPM
Old 03-26-2015, 11:15 AM
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Okay thats the needle valve setting but did you guys leave the regulator setting where it was out of the box or does this need tweaking as well. ( By the way its a non cdi 185)
Old 03-26-2015, 12:09 PM
  #63  
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it is very deceiving. open the high speed over 3 full turns, maybe more and try again. Also, richen the low end as well.
Old 04-04-2015, 01:50 AM
  #64  
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Regulator is too rich.
Old 04-06-2015, 10:43 AM
  #65  
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Quickset,
what happened? a couple of us responded but we have heard nothing from you.
Old 07-09-2015, 06:49 AM
  #66  
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Hello all! What prop sizes are people using for the 1.85 cdi?
Old 07-09-2015, 11:34 AM
  #67  
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Originally Posted by Wild Beat
Hello all! What prop sizes are people using for the 1.85 cdi?
20.5 X 10PN.

I have the 21 X 10.5 coming to try.
Old 07-09-2015, 12:54 PM
  #68  
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Originally Posted by drac1
20.5 X 10PN.

I have the 21 X 10.5 coming to try.
I 've been using the same prop on the OS GT33. Works very well. Except the prop is so darned heavy I'm getting weird airplane gyrations.

Scott what kind of numbers is yours turning this prop at full revs?
Old 07-09-2015, 01:29 PM
  #69  
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Hi Matt,

6900-7000. Ths is around 200 less than some others, but I mix my own fuel and I think the calorific value of the methanol I use is less than some of the pre mixed fuels. The engine has also done alot of work, so probably could do with a new ring which I will do soon.
Old 07-09-2015, 07:43 PM
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Originally Posted by drac1
Hi Matt,

6900-7000. Ths is around 200 less than some others, but I mix my own fuel and I think the calorific value of the methanol I use is less than some of the pre mixed fuels. The engine has also done alot of work, so probably could do with a new ring which I will do soon.
Thanks. I'm getting similar output on my 4 year old 33. The 20.5 x 10 may not be the most load still. I hear a little prop noise. I wish there was an 11 pitch. Just don't want to bend it myself.

I know you have a GT33 project in the works. The throttle curve is pretty strange compared to the glow stuff but throttle can be tamed with some work and thought.
Old 07-09-2015, 08:02 PM
  #71  
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Originally Posted by MTK
Thanks. I'm getting similar output on my 4 year old 33. The 20.5 x 10 may not be the most load still. I hear a little prop noise. I wish there was an 11 pitch. Just don't want to bend it myself.

I know you have a GT33 project in the works. The throttle curve is pretty strange compared to the glow stuff but throttle can be tamed with some work and thought.
I have a 21X 10.5 coming, so will be interesting to see how that goes.
From what I hear, if the pitch is changed on a APC, it will gradually go back to the original pitch?

The 20.5 x 10 is a 175 prop, whereas the 21 x 10.5 is designed for the 185.

Last edited by drac1; 07-09-2015 at 08:12 PM.
Old 07-10-2015, 09:14 AM
  #72  
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Interesting. So they either narrowed the blades even more to keep rpm at 6900 or left them the same and are stiving to reduce rpm a couple 100 r's. I suppose striving to get closer to electric rpms. I'm an interested bystander, not so much for the YS but for the prop.
Old 10-15-2015, 12:19 AM
  #73  
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Hi All
I'm just getting into setting up my new ship, and was wondering about the cdi 185 zero. Has anyone tried the 'zero' version? Any thoughts? Is it worth going that way, and have the same running and power characteristics of the non 'zero' version? Or should I stick with the normal non 'zero' cdi 185.
Old 10-15-2015, 01:26 AM
  #74  
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Originally Posted by topiwala
Hi All
I'm just getting into setting up my new ship, and was wondering about the cdi 185 zero. Has anyone tried the 'zero' version? Any thoughts? Is it worth going that way, and have the same running and power characteristics of the non 'zero' version? Or should I stick with the normal non 'zero' cdi 185.
If the Zero version produced the same power as the Nitro version, it would be a no brainer. But as they say, you can't have the cake and eat it.
From what I've read, the zero doesn't make as much power which makes sense. Nitro equals power.

Run whichever one suits what you want. If you're after cheaper running costs, go with the zero. If you want power, then its nitro.
Old 10-15-2015, 08:49 PM
  #75  
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Originally Posted by drac1
If the Zero version produced the same power as the Nitro version, it would be a no brainer. But as they say, you can't have the cake and eat it.
From what I've read, the zero doesn't make as much power which makes sense. Nitro equals power.

Run whichever one suits what you want. If you're after cheaper running costs, go with the zero. If you want power, then its nitro.
Scott, did you run the 21x10.5"? Results?


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