<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Has anyone used the water soluble Nelson Hobby paint?<br>
How is it for durability and weight?<br>
John<br>
<br>
Woodward, Jim wrote:
<blockquote
cite="mid4C2CB387C321AA469DAFCAEECDCBED400686BC@bsbpbex1.bsb.simula.armorholdings.local"
type="cite">
<meta http-equiv="Context-Type" content="text/html; charset=us-ascii">
<div>
<div>
<p> <span><a href="http://www.nelsonhobby.com/cnc.html">http://www.nelsonhobby.com/cnc.html</a>
</span> </p>
<p> <span> </span> </p>
<p> <span>See this link too. </span> </p>
<p> <span>Jim</span> <span> W. </span> </p>
<p> <span> </span> </p>
<div>
<p> <span> </span> </p>
<p><b> <span>From:</span> </b> <span>
<a class="moz-txt-link-abbreviated" href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a>
[<a class="moz-txt-link-freetext" href="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>]
<b><span>On Behalf Of </span></b>Earl Haury<br>
<b><span>Sent:</span></b> Friday, August 31, 2007
11:57 AM<br>
<b><span>To:</span></b> NSRCA Mailing List <br>
<b><span>Subject:</span></b> Re: [NSRCA-discussion]
Metal Servo Arms</span> </p>
</div>
<p> <span> </span> </p>
<div>
<div>
<p> <span>The Al arms are quite resistant to twisting - but you're
correct that the nylon wheel is plenty strong and the Al wheel stronger
than
either. </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>A few years back I tested the strength of the JR 8411
Al spline and the equivalent nylon spline coupled to stock & H9
Al arms. The test involved making an adaptor to set over a single arm
and
position an inch-lb torque wrench directly over the shaft. An output
gear /
shaft was clamped in a vise and the torque wrench used to measure the
"give" point and the failure point with different combinations. All
exceeded the torque rating of the servo.</span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>Nylon shaft & arm: "Give" @ 320 oz in and
failure @ 480 oz in - the spline shaft twisted and slipped, arm spline
damage
(yet there was enough binding to retain some control transfer).</span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>Nylon shaft & Al arm: "Give @ 320 oz in and failure
@ 560 oz in - shaft spline total failure.</span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>Al shaft & nylon arm: No "give" point. Crisp
failure @ 560 oz in - arm spline total failure.</span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>Al shaft & Al arm: No "give" point, Crisp
failure @ 1600 oz in - no spline damage, shaft broke below spine.</span>
</p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>Earl</span> </p>
</div>
</div>
<blockquote>
<div>
<p> <span>----- Original Message ----- </span> </p>
</div>
<div>
<p><b> <span>From:</span> </b> <span> <a
href="mailto:twtaylor@ftc-i.net" title="twtaylor@ftc-i.net">twtaylor</a>
</span> </p>
</div>
<div>
<p><b> <span>To:</span> </b> <span> <a
href="mailto:nsrca-discussion@lists.nsrca.org"
title="nsrca-discussion@lists.nsrca.org">'NSRCA Mailing List'</a> </span>
</p>
</div>
<div>
<p><b> <span>Sent:</span> </b> <span> Friday, August 31,
2007 9:09 AM </span> </p>
</div>
<div>
<p><b> <span>Subject:</span> </b> <span> Re:
[NSRCA-discussion] Metal Servo Arms </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<p> <span>Last night I was playing with them, they
fit the plastic output gear just fine. I was trying to get them on
8411sa’s with the metal splines. I finally did but they won’t go
down as far as a nylon arm. Using a magnifying glass I could see where
the alum
arm is fully seated internally. Just looks different than with the
plastic arm,
as the arm doesn’t cover the entire part of the splines at the bottom
like the standard arm does. I’m using this on elev with the MK bearing
fitting. I’m going to replace the rudder arm with a H9 as well. </span>
</p>
<p> <span> </span> </p>
<p> <span>Tim </span> </p>
<p> <span> </span> </p>
<div>
<div> <span></span> </div>
</div>
</blockquote>
</div>
</div>
<div> <span> </span> </div>
<div> <span> CONFIDENTIALITY NOTICE: This e-mail message, including
any attachments, is for the sole use of the intended recipient(s) and
may contain confidential and proprietary information. Any unauthorized
review, use, disclosure or distribution is prohibited. If you are not
the intended recipient(s), please contact the sender by reply e-mail
and destroy all copies of the original message. </span> </div>
<span>
<div> </div>
<div>
<div>
<blockquote>
<div>
<div> <span> </span> </div>
</div>
</blockquote>
</div>
</div>
<div>
<div>
<blockquote>
<div>
<div> <span></span> </div>
<p><b> <span>From:</span> </b> <span>
<a class="moz-txt-link-abbreviated" href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a> [mailto:
<a class="moz-txt-link-abbreviated" href="mailto:nsrca-discussion-bounces@lists.nsrca.org">nsrca-discussion-bounces@lists.nsrca.org</a> ] <b><span>On Behalf Of </span></b><a class="moz-txt-link-abbreviated" href="mailto:vicenterc@comcast.net">vicenterc@comcast.net</a><br>
<b><span>Sent:</span></b> Friday, August 31, 2007 9:57
AM<br>
<b><span>To:</span></b> NSRCA Mailing List ; NSRCA Mailing List <br>
<b><span>Subject:</span></b> Re: [NSRCA-discussion]
Metal Servo Arms</span> </p>
</div>
<p> <span> </span> </p>
<div>
<p> <span>Earl, </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>I wonder if the aluminum single arm will twist more than
the round
nylon wheel in similar loads and conditions. Using MK
link (which are very close to the plane of the wheel) with round
nylon wheels has been working very well for me. The reason why the
nylon
wheel is strong is because the structure is closed. Of course
aluminum wheel would be stronger than nylon wheel. </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>--<br>
Vicente "Vince" Bortone </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<blockquote>
<p> <span>-------------- Original message -------------- <br>
From: "Earl Haury" <a class="moz-txt-link-rfc2396E" href="mailto:ejhaury@comcast.net"><ejhaury@comcast.net></a> </span> </p>
<div>
<p> <span>The nylon servo arms are quite adequate when used with
a
clevis that applies the force in line with the plane of the arm
(typical pin
clevis). Pushrod ends that bolt to one side of the arm move the force
off the
plane of the arm and thereby impart a twisting force to the arm. (DuBro
type
ball links are the extreme.) Add a bunch of vibration to the normal
loads and
the nylon arm may eventually fail - a wheel is a much better choice if
one uses
the nylon accessories. In addition to better withstanding the twisting
forces
of offset linkage, the aluminum arm is more substantial for screw
mounting the
ball / ball bearing end.</span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>Jim</span> <span> is correct regarding the H9 arms on
JR servos - there seems to be more variation in the spline of the
output than
the spline of the arm. (An arm tight on one servo may fit nicely on
another.)
OTOH, I've found the H9 arms to fit Futaba servos consistently well.</span>
</p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>Earl</span> </p>
</div>
<blockquote>
<div>
<p> <span>----- Original Message ----- </span> </p>
</div>
<div>
<p><b> <span>From:</span> </b> <span> <a
href="mailto:vicenterc@comcast.net" title="vicenterc@comcast.net">vicenterc@comcast.net</a>
</span> </p>
</div>
<div>
<p><b> <span>To:</span> </b> <span> <a
href="mailto:nsrca-discussion@lists.nsrca.org"
title="nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</a> ; <a
href="mailto:nsrca-discussion@lists.nsrca.org"
title="nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</a> </span>
</p>
</div>
<div>
<p><b> <span>Sent:</span> </b> <span> Friday, August 31,
2007 7:28 AM </span> </p>
</div>
<div>
<p><b> <span>Subject:</span> </b> <span> Re:
[NSRCA-discussion] Metal Servo Arms </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>For pattern I always use the nylon servo arms that
comes with the JR
servos. I am not sure why you need the metal servo arms. Usually I
use the round one for aileron and elevator. For rudder I use the heavy
duty arm that JR offers (comes in the 8611 servo). I never have
problems
with the nylon servo arms in pattern application. </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>Regards, </span> </p>
</div>
<div>
<p> <span>--<br>
Vicente "Vince" Bortone </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<blockquote>
<p> <span>-------------- Original message -------------- <br>
From: Bob Richards <<a href="mailto:bob@toprudder.com">bob@toprudder.com</a>>
</span> </p>
<div>
<p> <span>I've used the H9 arms and the SWB arms. No
comparison, I will continue
to use the SWB arms. </span> </p>
</div>
<div>
<p> <span> </span> </p>
</div>
<div>
<p> <span>Bob R. </span> </p>
</div>
<div>
<p> <span><br>
<br>
<b><i><span>Kelly Regan
<a class="moz-txt-link-rfc2396E" href="mailto:kelly.regan2@verizon.net"><kelly.regan2@verizon.net></a></span></i></b> wrote: </span> </p>
</div>
<blockquote>
<p> <span>Not an answer to your question but I find the
SWB arms much nicer<br>
since they are split. They use a a 2/56 clamp screw and nylon locking<br>
nut to draw the clamp tight around the spline of the servo shaft.<br>
<br>
twtaylor wrote:<br>
><br>
> I bought some Hanger 9 alum servo arms and when I put them on they
are <br>
> VERY hard to get to pull down on to the servo. Is<br>
><br>
-- <br>
<br>
________________________________<br>
Kelly Regan<br>
Home Page: <a class="moz-txt-link-abbreviated" href="http://www.reganspace.com">www.reganspace.com</a><br>
________________________________<br>
<br>
_______________________________________________<br>
NSRCA-discussion mailing list<br>
<a class="moz-txt-link-abbreviated" href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br>
<a class="moz-txt-link-freetext" href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a> </span> </p>
</blockquote>
<p> <span> </span> </p>
</blockquote>
<div> <span> </span> </div>
<p> <span>_______________________________________________<br>
NSRCA-discussion mailing list<br>
<a class="moz-txt-link-abbreviated" href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br>
<a class="moz-txt-link-freetext" href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a> </span> </p>
</blockquote>
</blockquote>
<div> <span> </span> </div>
<p> <span>_______________________________________________<br>
NSRCA-discussion mailing list<br>
<a class="moz-txt-link-abbreviated" href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br>
<a class="moz-txt-link-freetext" href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a> </span> </p>
</blockquote>
</div>
</div>
</span>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
NSRCA-discussion mailing list
<a class="moz-txt-link-abbreviated" href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a>
<a class="moz-txt-link-freetext" href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></pre>
</blockquote>
</body>
</html>