Slow fly prop or not?    Gallery
View related threads: (in this forum | in all forums)

Logged in as Guest



Users viewing this topic: none
    Search This Thread  
 
Printable Version

All Forums >> RC Airplanes >> Beginners >> Slow fly prop or not?
Page: [1]

Tower Hobbies Get Coupon Codes Brands  
Login
Message << Older Topic   Newer Topic >>
Slow fly prop or not? - 11/21/2012 10:42 PM   
Popriv


 

Posts: 799
Score: 216
Joined: 5/5/2008
Last Login: 5/22/2013
From: bellingham, MA, USA
Status: offline 		Picked up a couple of props for my 28oz. Electric yak

I chose the SF. Slow fly props. They seem thinner than the regular electric props.

Now I wonder if I choose correctly? What would be appropriate for the SF props.

I think it was a 11x4.7 prop... I figured I will be flying slow 3D ?????


Steve

_____________________________

Excuse me while I touch the sky...

Hide Signatures
       Post #: 1

RE: Slow fly prop or not? - 11/23/2012 4:45 AM   
opjose



Posts: 12254
Score: 280
Joined: 11/26/2005
Last Login: 5/22/2013
From: Poolesville, MD, USA
Status: offline 		Insufficient info on your post, but you posted again in another thread.

There you gave the rest of the information.

Switch to a standard "E" prop.



_____________________________

Don''t worry, be happy and fly something!

Hide Signatures

(in reply to Popriv)
       Post #: 2

RE: Slow fly prop or not? - 11/23/2012 5:15 AM   
oskartek


 

Posts: 258
Score: 130
Joined: 11/11/2009
Last Login: 5/18/2013
From: Cedar City, UT, USA
Status: offline 		This a good site to help you select the most efficient prop/ motor combination
for your application.
If your motor is not listed just use the closest KvA rating.
It has worked well for me.


Happy flyin', Oscar


_____________________________

A man that hates kids and dogs cant be all bad. But then, Ive met some dogs that I liked.

Hide Signatures

(in reply to opjose)
       Post #: 3

RE: Slow fly prop or not? - 11/23/2012 5:17 AM   
nitro wing


 

Posts: 3654
Score: 125
Joined: 9/29/2003
Last Login: 5/22/2013
From: surrey, BC, CANADA
Status: offline 		post the motor sixe and KV
I have used SF props where a slim E prop was recomended and preferred it, but it all depends on set up. post as much info as you have available

Hide Signatures

(in reply to opjose)
       Post #: 4

RE: Slow fly prop or not? - 11/23/2012 6:16 AM   
mike109



Posts: 1429
Score: 148
Joined: 7/25/2004
Last Login: 5/22/2013
From: DubboNew South Wales, AUSTRALIA
Status: offline 		G'day

On APC's website they suggest -

Glow Props Max rpm = 190,000 / prop diameter in inches

Therefore a 10 x 6 prop has a max rpm rating of 19,000 rpm

Thin Electric and Folding Electric = 145,000 / diameter in inches

Therefore a 10 x 6 prop has a max rpm rating of 14,500 rpm

Slow fly props Max rpm = 65,000 / prop diameter in inches

Therefore a 10 x 6 prop has a max rating of 6,500 rpm.

If you are using 10 or 11 inch slow fly props, you are well outside the max rating suggested by these calcs with a 1250 kv motor which is going to try to turn the prop at about 12,500 rpm.

Cheers

Mike in Oz


_____________________________

"I just had no control. Must be the radio." Club Saito #597 Kadet Brotherhood #66

Hide Signatures

(in reply to nitro wing)
       Post #: 5

RE: Slow fly prop or not? - 11/23/2012 11:55 AM   
Popriv


 

Posts: 799
Score: 216
Joined: 5/5/2008
Last Login: 5/22/2013
From: bellingham, MA, USA
Status: offline 		Got it, thanks guys....


_____________________________

Excuse me while I touch the sky...

Hide Signatures

(in reply to mike109)
       Post #: 6

Page:   [1]
All Forums >> RC Airplanes >> Beginners >> Slow fly prop or not?
Page: [1]





Jump to:


 
Google 



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

Photo Gallery | Instructor Search | Field|Track|Marina Search

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

SITE MAP!   : :   FORUM RULES

RC Universe is a service of Internet Brands, Inc. Copyright © 2001-2013.

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


0.201RCU1