neverlostoftenlate(at)yah
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 Posted: Wed Dec 16, 2009 7:57 pm Post subject: speed sensor |
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A bit of research/thought on using a simple low power accutate frequency transmitter - and measuring the Doppler might give you the accuracy and easy mounting you seek.
--- On Wed, 12/16/09, AeroElectric-List Digest Server <aeroelectric-list(at)matronics.com> wrote:
[quote]
From: AeroElectric-List Digest Server <aeroelectric-list(at)matronics.com>
Subject: AeroElectric-List Digest: 14 Msgs - 12/15/09
To: "AeroElectric-List Digest List" <aeroelectric-list-digest(at)matronics.com>
Date: Wednesday, December 16, 2009, 2:55 AM
*
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AeroElectric-List Digest Archive
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Total Messages Posted Tue 12/15/09: 14
----------------------------------------------------------
Today's Message Index:
----------------------
1. 05:49 AM - Re: LOOKING FOR RIGHT ANGLE BNC CONNECTOR (Geoff Heap)
2. 06:11 AM - Re: Re: Vertical Power? (Gilles Thesee)
3. 07:03 AM - Re: Kind of off topic. Speed sensor needed. (Robert Reed)
4. 07:13 AM - xm weather connector ([url=/mc/compose?to=jtortho(at)aol.com]jtortho(at)aol.com[/url])
5. 07:24 AM - Re: LOOKING FOR RIGHT ANGLE BNC CONNECTOR (user9253)
6. 07:56 AM - Re: Kind of off topic. Speed sensor needed. (Robert L. Nuckolls, III)
7. 08:05 AM - Re: Kind of off topic. Speed sensor needed. (David Nelson)
8. 08:34 AM - Re: Kind of off topic. Speed sensor needed. (user9253)
9. 09:29 AM - Z-19 (Jay Hyde)
10. 10:24 AM - Re: Z-19 (Allen Fulmer)
11. 10:57 AM - Re: Kind of off topic. Speed sensor needed. (ray)
12. 05:42 PM - Re: Z-19 (Robert L. Nuckolls, III)
13. 06:10 PM - Re: Re: Power Opti-Miser (Robert L. Nuckolls, III)
14. 10:28 PM - Re: Battery Equalizers (Robert L. Nuckolls, III)
________________________________ Message 1 _____________________________________
Time: 05:49:22 AM PST US
Subject: AeroElectric-List: Re: LOOKING FOR RIGHT ANGLE BNC CONNECTOR
From: "Geoff Heap" <[url=/mc/compose?to=stol10(at)comcast.net]stol10(at)comcast.net[/url]>
Sorry. I wasn't complaining about the hiss. I was complaining that, that was all
i got. I live under Philadelphia approach. Commercial craft at a couple thousand
feet most of the day. I thought I would be picking up some of that. I'll
borrow a hand held and test it with that on Saturday.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=277599#277599
________________________________ Message 2 _____________________________________
Time: 06:11:14 AM PST US
From: Gilles Thesee <[url=/mc/compose?to=Gilles.Thesee(at)ac-grenoble.fr]Gilles.Thesee(at)ac-grenoble.fr[/url]>
Subject: Re: Re: Vertical Power?
Matt Dralle a crit :
| Quote: |
Here is a link to my builder's log, specifically regarding the avionics installation.
Lots of pictures and dialog describing the system. Let me know if you
|
have any questions.
Matt,
Thanks.
Best regards,
--
Gilles
http://contrails.free.fr
________________________________ Message 3 _____________________________________
Time: 07:03:31 AM PST US
From: Robert Reed <[url=/mc/compose?to=robertr237(at)att.net]robertr237(at)att.net[/url]>
Subject: Re: AeroElectric-List: Kind of off topic. Speed sensor needed.
If the laser were ground mounted the only thing required on the plane might
be a couple of identifiable stripes of paint on the underside of the aircr
aft.- It would not require a high powered laser and shouldn't pose any da
nger to the pilot since the directionality of the beam would be vertical an
d not directed at the pilot.=0A=0AIf the laser were mounted inside the plan
e it-wouldn't require more than a dime sized opening that could be covere
d with glass.- The laser beam would be setup to oscillate back and forth
with a ground based sensor to detect the beam as the plane crossed the dete
ction points.- The size of current low power lasers are so small that the
re should be no problem with either weight or drag.- =0A=0ABob=0A=0A=0A
=0A________________________________=0AFrom: Sam Hoskins <sam.hoskins(at)gmail.
com>=0ATo: aeroelectric-list <[url=/mc/compose?to=aeroelectric-list(at)matronics.com]aeroelectric-list(at)matronics.com[/url]>=0ASent: Mon,
December 14, 2009 8:01:49 PM=0ASubject: Re: Kind of off
topic. Speed sensor needed.=0A=0ARadar guns were used with the AirVenture
Cup racers several years ago and I think they didn't work too well.- The
SARL guys are looking for some precise timing.=0A=0AThey currently are usin
g sighting rods and triangulation, but it is leaving too much judgment to t
he timing person.- I think that would also apply to David's suggestion.
=0A=0AThey want to capture a full runway length of time, to have a more rep
resentative view of true speed, rather than just a snapshot that a radar gu
n might provide.=0A=0AAn aircraft mounted lasar system might to it, but how
.where would you mount it to many different kinds of aircraft, and in such
a way that it would not create drag?=0A=0AThese are the problems the SARL g
uys are trying to work around.=0A=0AThanks for the suggestions.=0A=0ASam=0A
=0A=0AOn Mon, Dec 14, 2009 at 6:16 PM, Robert D. Taylor <[url=/mc/compose?to=FLYDAD57(at)neo.rr.co]FLYDAD57(at)neo.rr.co[/url]
m> wrote:=0A=0AWould a radar gun, like the cops use, work??=0A>-=0A>=0A>-
--
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