140dz prop and rpm?  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       



All Forums >> RC Airplanes >> Pattern Flying >> 140dz prop and rpm? Page: [1]

Login
Message << Older Topic   Newer Topic >>
140dz prop and rpm? - 7/8/2007 3:29:41 PM   
yepe


 

Posts: 135
Joined: 10/22/2004
From: Bacolod, PHILIPPINES
Status: offline 		Hi, guys whats the best prop size for flying pattern with 140dz and recommended rpm using CP30%. Thanks
       Post #: 1

RE: 140dz prop and rpm? - 7/9/2007 5:30:16 AM   
mjfrederick


 

Posts: 631
Joined: 8/18/2006
From: Baton Rouge, LA, USA
Status: online 		Check the YS support forum, there's a couple recent posts on props for the 140DZ. I used to run a 17x12, but went down to a 17x10.

_____________________________

mjfrederick AMA 275874 NSRCA 4134
Maybe the Dingo ate your baby

(in reply to yepe)
       Post #: 2

RE: 140dz prop and rpm? - 7/9/2007 7:44:19 AM   
Eggert


 

Posts: 87
Joined: 9/16/2004
From: Farum, DENMARK
Status: offline 		What ? 17x12 on a 140 DZ you're kidding. right ? If you want the motor to last a long time, you do not want to over prop it with such a large propeller. Period

(in reply to mjfrederick)
       Post #: 3

RE: 140dz prop and rpm? - 7/9/2007 8:51:07 AM   
papaone



Posts: 591
Joined: 3/11/2005
From: Salon, FRANCE
Status: offline 		Hi yepe

What is your pattern ?
Propeller must be adapted to engine and fuel but also to the pattern (weight ...)

I used APC 16x12 on 140DZ with 25% nitro and APC 17x12 on 160DZ with 25 % nitro on my pattern Partner (4600g).
I don't know rpm. I think it's not important to know rpm.
The better test is to do F3A program.
Regards

< Message edited by papaone -- 7/9/2007 8:54:37 AM >

(in reply to Eggert)
       Post #: 4

RE: 140dz prop and rpm? - 7/9/2007 3:02:38 PM   
yepe


 

Posts: 135
Joined: 10/22/2004
From: Bacolod, PHILIPPINES
Status: offline 		Thanks papone. My plane is a CA eclipse 4900 grams on the weight. Right now I'm using 16x12 apc, and its under power compared to my 160dz on a Brio. I'm having a hard time flying P07 squence. The needle valve setting 1 1/4 from close, shall I close it to 1 turn?

(in reply to papaone)
       Post #: 5

RE: 140dz prop and rpm? - 7/9/2007 3:29:11 PM   
papaone



Posts: 591
Joined: 3/11/2005
From: Salon, FRANCE
Status: offline 		Hi Yepe

160DZ is more powerfull. But 140DZ is well for an Eclipse.
The needle valve setting is 1 1/2 from close on my engine. I prefer to open needle valve;
so plane accelerates in the verticals.
How many flights or duration has your engine ?
An important point for power is the sealing of rotative valve in the back of engine. This rotative valve must be smooth and fix very tighten.
regards


< Message edited by papaone -- 7/9/2007 8:05:32 PM >

(in reply to yepe)
       Post #: 6

RE: 140dz prop and rpm? - 7/9/2007 4:08:35 PM   
yepe


 

Posts: 135
Joined: 10/22/2004
From: Bacolod, PHILIPPINES
Status: offline 		Thanks again Papone,
This engine was newly rebuilt by Ricard Verano YS performance. I tried 1 1/2 before rpm is only 7800 with 16x12 apc. Tried 1 1/4 close to 8000 rpm. If I could get close to 8500 it would be great. My fuel is 30% CP, btw I did not notice any adjustments at the back of the engine. What does rotative valve looks like. The only modification I've done is removing the venturi inside the carb. Thanks

(in reply to papaone)
       Post #: 7

RE: 140dz prop and rpm? - 7/9/2007 7:54:09 PM   
mjfrederick


 

Posts: 631
Joined: 8/18/2006
From: Baton Rouge, LA, USA
Status: online 		While I agree the 17x12 was probably too much prop for the 140DZ, I never had a problem with it. I went down to the 17x10 just to reduce speed (I'm new to the 4-strokes so I'm still working on my throttle management a lot).

_____________________________

mjfrederick AMA 275874 NSRCA 4134
Maybe the Dingo ate your baby

(in reply to yepe)
       Post #: 8

RE: 140dz prop and rpm? - 7/9/2007 9:36:56 PM   
riot3d


 

Posts: 568
Joined: 2/8/2005
From: oakland, CA, USA
Status: offline 		Try 16.5x12w, you should get at least 8,300 to 8,400 with CP 30%.

Adrian

(in reply to mjfrederick)
       Post #: 9

RE: 140dz prop and rpm? - 7/9/2007 10:48:21 PM   
tommy s


 

Posts: 1202
Joined: 1/14/2004
From: houston, TX, USA
Status: offline 		APC 17x10 narrow with 30% Powermaster DZ fuel - 10lb 8oz airplane.
The YS DZ's seem happier when you let them rev a little and don't load them
down too much. You'll notice they will run considerably cooler with the lower
pitch prop also.

tommy s

(in reply to yepe)
       Post #: 10

RE: 140dz prop and rpm? - 7/10/2007 8:14:57 AM   
papaone



Posts: 591
Joined: 3/11/2005
From: Salon, FRANCE
Status: offline 		Hi Yepe

I just want to say if your engine has no power, may be sealing of rotative valve is bad.
But you have not this problem. Rotative valve is Part B on this schema
http://www.centralhobbies.com/Engines/parts/ys160ex.htm

(in reply to tommy s)
       Post #: 11

RE: 140dz prop and rpm? - 7/10/2007 10:34:27 AM   
Divesplat



Posts: 594
Joined: 1/25/2002
From: Lubbock, TX, USA
Status: offline 		I ran the 16.5X12W APC on my 140Dz's. Good combo.

Ed

_____________________________

Pattern or IMAC, loops should be round, lines should be straight, and either props can send you to the hospital!:)

(in reply to papaone)
       Post #: 12

Page:   [1]
All Forums >> RC Airplanes >> Pattern Flying >> 140dz prop and rpm?
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.625RCU5