3-bladed props for OS160FX

[Dean Pappas]

Claudio,
Ideally you would twist the prop at several places to acheiv helical pitch. In practice, this is entirely unnecessary. Twist once, as close to the hub as practical, and that will work just fine. I see that Dave L added more detail to the procedure.
 
until later,
Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Claudio Garcia Rosa
Sent: Monday, November 15, 2004 7:07 PM
To: discussion at nsrca.org
Subject: RE: 3-bladed props for OS160FX


Gracias Dean,
 
Just to see if I´ve understood,
I must twist the blade about 1-1/2" from the root untill it reaches the 12" pitch?.
Or must I twist it progressively from the root to the tip ?
 
Saludos.
Claudio 

----- Original Message ----- 
From: Dean  <mailto:d.pappas at kodeos.com> Pappas 
To: discussion at nsrca.org 
Sent: Monday, November 15, 2004 7:05 PM
Subject: RE: 3-bladed props for OS160FX

Saludos Claudio,
First you need a pitch gauge, and then a monokote hot air gun. For this size prop, I actually use 2 heat guns, to warm the thick blade root. You will probably have to apply heat for 30 ~ 60 seconds with two heat guns. Warm the blade about 1-1/2" from the root, and twist the blade until it cools. You will need something to prevent burning your hands, like a block of wood that has a narrow hole in it. The blade can be restored to its original shape by warming, if and when you need several tries to achieve the dewsired pitch. It will take practice to keep from bending the blade along its length, while just twisting it.
 
Try practicing on a small, disposable, two-bladed prop!
 
Have Fun,
 
Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Claudio Garcia Rosa
Sent: Monday, November 15, 2004 4:59 PM
To: discussion at nsrca.org
Subject: RE: 3-bladed props for OS160FX


Hello Dean,
 
I have the same prop.
Can you please tel me how to de-pitch it to 12 ?
 
Thanks in advance.
Claudio

----- Original Message ----- 
From: Dean  <mailto:d.pappas at kodeos.com> Pappas 
To: discussion at nsrca.org 
Sent: Monday, November 15, 2004 6:42 PM
Subject: RE: 3-bladed props for OS160FX

Try the stock 15-3/4 X 13 APC.
You migh de-pitch it to a 12.
 

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: discussion-request at nsrca.org [ mailto:discussion-request at nsrca.org]On Behalf Of randy10926 at comcast.net
Sent: Monday, November 15, 2004 4:41 PM
To: discussion at nsrca.org @nsrca.
Subject: 3-bladed props for OS160FX


So what 3 bladed prop would you use on an OS160FX?  
 
Any reason to think a bolly carbon prop is better than an APC on this engine?
 
Randy

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