---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 04/15/15: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 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) ________________________________ Message 1 _____________________________________ Time: 05:06:52 AM PST US Subject: AeroElectric-List: Re: Risks associated with unproven crimp tools . . .. From: "racerjerry" 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 _____________________________________ Time: 06:36:24 AM PST US Subject: AeroElectric-List: Dual Control Stick Trim Switches Without Relays From: "user9253" 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 _____________________________________ Time: 11:26:08 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: 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. 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