Today's Message Index:
----------------------
1. 07:32 AM - Exp.Helicopter clutch (AMERIPOND@cs.com)
2. 09:03 AM - Re: Exp.Helicopter clutch (A. F. Cacella)
3. 11:11 AM - Re: Exp.Helicopter clutch (Denny Mortensen)
4. 04:34 PM - Re: Exp.Helicopter clutch (Martin Boulerice)
5. 05:41 PM - Re: Exp.Helicopter clutch (AMERIPOND@cs.com)
6. 05:43 PM - Re: Exp.Helicopter clutch (AMERIPOND@cs.com)
7. 05:56 PM - Re: Exp.Helicopter clutch (AMERIPOND@cs.com)
8. 07:00 PM - Continental IO 240 B?? Good or Bad??? (donmorrisey@netscape.net)
9. 10:48 PM - Kitplanes Magazine Request: Feedback on Hazard Avoidance Avionics Installations (Cory Emberson)
Message 1
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| Subject: | Exp.Helicopter clutch |
--> Homebuilt-List message posted by: AMERIPOND@cs.com
Hi any one know of circuitry that would show a clutch in transition I have a
light at full up and full down but would like to see a light indicating
movement..there is a micro switch for engage and disengage for those red and
green
indicator lights, but I can't figure out how to make the switches show
travel..with like an amber light. I bought Bob's book but no help....JimL
Message 2
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| Subject: | Re: Exp.Helicopter clutch |
--> Homebuilt-List message posted by: "A. F. Cacella" <aerofabco@juno.com>
Jim, what I think you are looking for is pretty easy.
You have simple microswitches operated at the ends to operate
Red and Green LEDs and want an Amber LED if neither Red
nor Green is on / lighted ?
My first thought is a differential amplifier using a bi-directional
LED --- it lights Red for current flow (voltage differential) in
one direction, Green for the opposite condition, and both R & G
elements ( pseudo-Amber ) if the two inputs are the same.....
but these bi-color LEDs are often awkward to discern the color,
so I think I'd want the three separate LEDs instead.
You might use a packaged logic gate, OR variety: I'll doodle a
bit and get back to you with a discrete components schematic.
( This will actually be the components inside the OR gate. )
With the OR gate, the two inputs A & B would be connected
to the "hot" side of each microswitched-LED. The OR gate
output C would be pulled-up via the amber LED.
"If either ( A OR B ) goes high (R or G lighted) output C is high
and the Amber LED is not lighted."
"If both ( A OR B ) are low (R & G not lighted) output C is low
and the Amber LED lights."
Neat thing about Logic is its flexibility --- an AND gate, a NAND
(not-AND), a NOR (Not-OR), etc. can all be used easily to get
the light-on / off you are wanting.
A good, real electronics parts store ( NOT radio shack ) will have
Spec Sheets and Truth Tables for their line (Brand) of devices that
will identify the right pin #'s on the logic gate IC package you
choose.
Good luck,
a r t the Aero Fabrication Company
Winston-Salem, NC
On Mon, 30 Jan 2006 10:30:10 EST AMERIPOND@cs.com writes:
> --> Homebuilt-List message posted by: AMERIPOND@cs.com
>
> Hi any one know of circuitry that would show a clutch in transition
> I have a
> light at full up and full down but would like to see a light
> indicating
> movement..there is a micro switch for engage and disengage for
> those red and green
> indicator lights, but I can't figure out how to make the switches
> show
> travel..with like an amber light. I bought Bob's book but no
> help....JimL
>
>
Message 3
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| Subject: | Exp.Helicopter clutch |
--> Homebuilt-List message posted by: "Denny Mortensen" <dennymortensen@cableone.net>
One way you could maybe do this is to use a slider type of potentiometer
hooked to the linkage. This would act as a variable voltage divider. Then
all you need is a circuit that would read the voltage and display it on a
bar graph display. I started tinkering with something like this a while back
but never finished it out. I am planning on using something like this on the
landing brake on my Cozy. If your interested I could dig up what info I have
and send it to you?
Denny
-----Original Message-----
From: owner-homebuilt-list-server@matronics.com
[mailto:owner-homebuilt-list-server@matronics.com] On Behalf Of
AMERIPOND@cs.com
Sent: Monday, January 30, 2006 9:30 AM
Subject: Homebuilt-List: Exp.Helicopter clutch
--> Homebuilt-List message posted by: AMERIPOND@cs.com
Hi any one know of circuitry that would show a clutch in transition I have a
light at full up and full down but would like to see a light indicating
movement..there is a micro switch for engage and disengage for those red
and green
indicator lights, but I can't figure out how to make the switches show
travel..with like an amber light. I bought Bob's book but no help....JimL
Message 4
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| Subject: | Re: Exp.Helicopter clutch |
--> Homebuilt-List message posted by: Martin Boulerice <flying@videotron.ca>
Hello Jim,
Here are two simple suggestions:
1/ If you are looking for some kind of "in transit" indicator, you
could use two relays (low power), one powered from the full-up switch,
the other from the full-down switch.
When neither of them is activated, the amber light is powered (through
the Normally Close relays contacts). As soon as the full-up or full-down
switch powers its associated light, its relay open the circuit to the
amber light and the amber light turns off.
2/ If the micro-switchs are SPDT type (single pole - two positions), it
*could* be possible to to add the amber light without any relay.
I could send you a simple hand drawn schematic.
MB
AMERIPOND@cs.com wrote:
>--> Homebuilt-List message posted by: AMERIPOND@cs.com
>
>Hi any one know of circuitry that would show a clutch in transition I have a
>light at full up and full down but would like to see a light indicating
>movement..there is a micro switch for engage and disengage for those red and
green
>indicator lights, but I can't figure out how to make the switches show
>travel..with like an amber light. I bought Bob's book but no help....JimL
>
>
>
>
>
>
>
>
>
Message 5
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| Subject: | Re: Exp.Helicopter clutch |
--> Homebuilt-List message posted by: AMERIPOND@cs.com
Thanks Art...Jim.Lynch
Message 6
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| Subject: | Re: Exp.Helicopter clutch |
--> Homebuilt-List message posted by: AMERIPOND@cs.com
Denny , always interested in thinking outside the box...Jim Lynch
Message 7
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| Subject: | Re: Exp.Helicopter clutch |
--> Homebuilt-List message posted by: AMERIPOND@cs.com
Matin, that would be great...Thanks in advance Jim Lynch
Message 8
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| Subject: | Continental IO 240 B?? Good or Bad??? |
--> Homebuilt-List message posted by: donmorrisey@netscape.net
Hello folks.
I'm at the point in my project (www.bushcaddy.com/R120Model.htm) that I want to make a decision on power. the Continental IO-240 B and a Lycoming 0-235 are the most powerful alternatives I have. I have an inside line on the Contiental IO 240 B and am wondering if I can get some feedback on any experiences - good or bad. the engine will come form Teledyne Mattituck, if that helps. I appreciate the input. Don....
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Message 9
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| Subject: | Kitplanes Magazine Request: Feedback on Hazard Avoidance |
Avionics Installations
--> Homebuilt-List message posted by: "Cory Emberson" <bootless@earthlink.net>
Hello all,
I'm working on an article for Kitplanes Magazine about the various products
for hazard avoidance (traffic, terrain and weather), and would like to hear
from anyone who's had this gear installed in their homebuilt. In particular,
I'd like to hear your experiences in what you learned in the process, what
you wish you had known at the outset, how your experiences with the gear has
been and whether it's met your expectations. I would like to focus on the
products that are not dug-in certified gear, but rather designed and
engineered for experimental aircraft.
In addition, I would like to talk to a few avionics shops who have some
solid experience in these installations in experiementals, so if you have a
shop that you felt did a good job, that would be great.
For the sake of the list traffic, I may be contacted off-list at (de-spammed
email to follow):
Coryemberson (at) earthlink (dot) net
Best,
Cory Emberson
Contributing Editor
Kitplanes Magazine
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