Today's Message Index:
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1. 05:06 AM - Re: Risks associated with unproven crimp tools . . . (racerjerry)
2. 06:36 AM - Dual Control Stick Trim Switches Without Relays (user9253)
3. 11:26 AM - Re: Re: Risks associated with unproven crimp tools . . . (Robert L. Nuckolls, III)
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Subject: | Re: Risks associated with unproven crimp tools . . |
.
In this and in similar threads, Bob N. has provided excellent instructions on how
to achieve gas tightness with wire terminals, but I would like to add some
additional info.
Some types of crimp tools press a single indentation into the barrel of the wire
terminal. This may not be ideal, but generally will suffice; however there
is one mistake very commonly made with this type of tool. Most inexpensive wire
terminals are formed from flat material and have butted ends at the barrel
(wire insertion point). If the crimp tool applies an indentation over the barrel
butted ends, a poor termination is almost guaranteed.
If it is late evening and the only crimp tool that you have in your toolbox presses
a single indentation into the wire terminal, take a close look at the terminal
barrel to see if there is a seam (butted ends). If there is a seam, apply
the indentation on the opposite side - not across the seam as in the illustration...,
or use better quality wire terminals formed from tubing without butted
ends.
--------
Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=440873#440873
Message 2
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Subject: | Dual Control Stick Trim Switches Without Relays |
Joel Graber designed and posted a circuit on VansAirforce that controls a trim
servo motor using
Ray Allen G205 SPDT stick grip switches mounted on pilot and copilot control sticks.
No relays are required. A PDF version can be download:
http://tinyurl.com/Trim-Circuit
Joel Graber has used this circuit in his RV-10 for over 600hrs.
In case of a runaway trim caused by a stuck switch or suicidal copilot, the opposite
direction
button can be pressed and held until the fuse or breaker can be pulled.
I do not know if anyone else has thought of this wiring scheme before or not,
but I thought it both simple and ingenious. Even the Ray Allen company thinks
that relays
must be used for 2 control sticks.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=440877#440877
Attachments:
http://forums.matronics.com//files/trim_switch_circuit_682.jpg
Message 3
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Subject: | Re: Risks associated with unproven crimp tools |
. . .
At 07:05 2015-04-15, you wrote:
>
>In this and in similar threads, Bob N. has provided excellent
>instructions on how to achieve gas tightness with wire terminals,
>but I would like to add some additional info.
>
>Some types of crimp tools press a single indentation into the barrel
>of the wire terminal. This may not be ideal, but generally will
>suffice; however there is one mistake very commonly made with this
>type of tool. Most inexpensive wire terminals are formed from flat
>material and have butted ends at the barrel (wire insertion
>point). If the crimp tool applies an indentation over the barrel
>butted ends, a poor termination is almost guaranteed.
>
>If it is late evening and the only crimp tool that you have in your
>toolbox presses a single indentation into the wire terminal, take a
>close look at the terminal barrel to see if there is a seam (butted
>ends). If there is a seam, apply the indentation on the opposite
>side - not across the seam as in the illustration..., or use better
>quality wire terminals formed from tubing without butted ends.
Those poke-a-hole tools are for welded
wire-grip barrel terminals for SOLID wire.
If you don't have a PIDG style crimp tool to
effect independent wire and insulation
grips then solder the terminals on and
put some heat shrink on for insulation
support.
Bob . . .
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