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what size prop - 8/17/2006 2:01:48 AM   
YZF Desert



Posts: 394
Joined: 11/4/2004
From: glendale, CA, USA
Status: offline 		I am building a 16" cracker box with a trinity green machine 27 turn motor on 6 cells and need some suggestions on what millimeter prop to start with. Im going to get the plastic props I think octura makes some but I need to know a size to start with so I can buy one and then get a few bigger and a few smaller to see what works the best.
       Post #: 1

RE: what size prop - 8/17/2006 2:32:24 AM   
CadillacETC2000



Posts: 6377
Joined: 10/23/2005
From: Tottenham/Orillia, ON, CANADA
Status: offline 		well is it submerged drive or a surface drive ?

_____________________________

Pity , with all my extra cash , just waiting to line someone''s pockets.

(in reply to YZF Desert)
       Post #: 2

RE: what size prop - 8/17/2006 2:43:10 AM   
YZF Desert



Posts: 394
Joined: 11/4/2004
From: glendale, CA, USA
Status: offline 		Sorry about that its a surface drive

(in reply to CadillacETC2000)
       Post #: 3

RE: what size prop - 8/17/2006 4:19:06 AM   
ryan_t888



Posts: 4455
Joined: 7/24/2005
From: Hamilton, ON, CANADA
Status: offline 		Assuming it is a stock 550, I would start with a low-medium, 30'smm prop. Maybe smaller/bigger.

Ryan

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A theory may be so rich in descriptive possibilities that it can be made to fit any data. - P.J.L.

(in reply to YZF Desert)
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RE: what size prop - 8/17/2006 4:25:18 AM   
YZF Desert



Posts: 394
Joined: 11/4/2004
From: glendale, CA, USA
Status: offline 		Thats what I was thinking but I wanted to check befor I went and bought a couple.

(in reply to ryan_t888)
       Post #: 5

RE: what size prop - 8/17/2006 4:30:15 AM   
ryan_t888



Posts: 4455
Joined: 7/24/2005
From: Hamilton, ON, CANADA
Status: offline 		You have to start somewhere. I can almost guarantee the first prop you try won't be the perfect one, no matter where you start.

Ryan

_____________________________

A theory may be so rich in descriptive possibilities that it can be made to fit any data. - P.J.L.

(in reply to YZF Desert)
       Post #: 6

RE: what size prop - 8/17/2006 1:45:48 PM   
jdoug


 

Posts: 1284
Joined: 1/18/2005
From: Nampa, ID, USA
Status: offline 		I used to run a 27T in my 19" scratch built cat. It ran well with a 32mm (Octura x432). It would push a 35mm but sacrificed just a little run time. Octura makes a plastic y531 (31mm) and couple other plastic ones in that range that I tried before selecting one in beryllium copper.

(in reply to ryan_t888)
       Post #: 7

RE: what size prop - 8/17/2006 6:07:38 PM   
YZF Desert



Posts: 394
Joined: 11/4/2004
From: glendale, CA, USA
Status: offline 		I put bearings in the motor instead of bushing so, I guess that helps a little. I will probably get 31-35 millimeter maybe a 37 also. A long time ago I ran a 13 inch cat with the traxxas trive system but direct drive with the traxxas prop and it was fast and the motor was fine, but I think the motor was able to rev out with that big of a prop was because it was a small boat. (surface drive)

< Message edited by YZF Desert -- 8/17/2006 6:14:22 PM >

(in reply to jdoug)
       Post #: 8

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