4-40 or 6-32 control arms?

[Dean Pappas]

So right, Ed.
The 6-40 is what comes with all the old Rocket City (now Nelson Hobby) stuff. The root diameter is noticeably bigger.
 
 

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 Ed Miller
Sent: Monday, February 14, 2005 10:40 AM
To: discussion at nsrca.org
Subject: Re: 4-40 or 6-32 control arms?


If you can find them, 6-40 are better, finer thread. I've been using Dubro metric socket head bolts ( can't remember size ) with the heads cut off, again finer thread than the 6/32.
Ed M.

----- Original Message ----- 
From: Rcmaster199 at aol.com 
To: discussion at nsrca.org 
Sent: Monday, February 14, 2005 10:09 AM
Subject: Re: 4-40 or 6-32 control arms?


In a message dated 2/14/2005 12:22:29 AM Eastern Standard Time, ed_alt at hotmail.com writes:


I've been using 6-32 bolts to make the control horn arms for my 2M setups so far.  It seems like that might be overkill and that 4-40 would suffice.  Is it OK to go lighter like this?
 
Thanks
Ed A.

Ed I wouldn't do that especially on ailerons. I have had 4-40's snap off like twigs on 90 sized models before. The vibration kills them.
 
Matt

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