[NSRCA-discussion] Two killed by model airplane
dwaynenancy
dwaynenancy at cox.net
Sun May 21 18:41:20 AKDT 2006
It was in Hungary and a commercial radio station was on "his"
frequency. Look it up on RCUniverse. Dwayne
Linda A. Carnes wrote:
> I apologize but I have missed something with e-mail going up and down.
>
>
>
> When and where did this happen?
>
>
>
> Are there any links to any news reports?
>
>
>
> Sincerely
> Linda A. Carnes
>
>
>
>
> ------------------------------------------------------------------------
>
> Subject:
> Re: [NSRCA-discussion] Two killed by model airplane
> From:
> "Keith Hoard" <khoard at gmail.com>
> Date:
> Sun, 21 May 2006 18:02:52 -0400
> To:
> "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
>
> To:
> "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
>
>
> Check out this video. The plane lands itself when the Tx is turned
> off. . .
>
> http://www.gregcovey.com/FMA/TrueFailsafeOperation.wmv
>
> I also believe it's only a matter of time until a 40%-er goes into a
> crowd here in the US. It happened last year, but we were fortunate
> that the injured guy was one of us. If it was a spectator AMA would
> have a line of ambulance chasers out their door.
>
> Discovery Channel did a series on high-powered model rockets last
> year. I thought it was interesting that to be able to buy the higher
> power engines you must be signed off by other rocketeers by proving
> your experience, knowledge, building ability, and safety conciousness
> to them.
>
>
> On 5/21/06, *Ed Alt* <ed_alt at hotmail.com <mailto:ed_alt at hotmail.com>>
> wrote:
>
> Bob:
> Ther are kill switches that can be set to work with a pre-set
> failsafe output. I think the problem with what you wuold like to
> see is that without some failsafe response from the receiver, it's
> hard to predict what you will get during interference. I don't
> think it's unsolvable though. If you used a spare channel for the
> kill switch, even a PPM receiver solution could work. A partially
> reliable solution would require either a PCM or PPM receiver to
> reliably hold one position and anything outside a narrow tolerance
> range would trigger the cutoff. That's easy to do.
>
> Here's a better solution, but it requires some cooperation from
> the radio manufacturers. What is really needed is a so-called
> "keep-alive" signal sequence from the transmitter. Veryone should
> standardize on the same, exact thing in a case like this.
> Keep-alives are used all the time in computing gear, to help
> "harden" the solution for failure detection/recovery etc. It's as
> old as dirt, used in Telecom, other mission critical stuff for
> medical, military etc. The idea in its simplest form is that a
> cyclic signal with known attributes is sent to the "target" (the
> kill switch for us). If the target doesn't get what it expects
> within it's timeout interval, it can initiate whatever action is
> deemed necessary.
>
> This can be far superior than just camping on a simple steady
> pulse position value, since you can make the probability of
> continuously receiving a "good" sequence from a bad RF link
> astronomically high. In other words, you can set the level of
> signal link deterioration before acting on it to something very
> fleeting or make it take longer to detect if you want a higher
> certainty that it is time to act on a bad link. So you could make
> the "stay running" sequence a known series of varying pulse
> widths, even using varying timing between the varying widths.
> None of this is especially difficult to do, nor should it be very
> expensive. On top of this, you could een couple the engine kill
> response to a loud piezo speaker and chirp out a warning -
> "Incoming". Make it an industry standard chirp sequence and it
> wuold be an unmistakable sign that a model was no longer under
> control of a good link. Then, any 3rd party devices that want to
> work with this have to get on board and be redesigned to recognize
> the standard LOS (loss of signal) protocol.
>
> Ed
>
>
> ----- Original Message -----
> *From:* Bob Pastorello <mailto:rcaerobob at cox.net>
> *To:* NSRCA Mailing List
> <mailto:nsrca-discussion at lists.nsrca.org>
> *Sent:* Sunday, May 21, 2006 1:48 PM
> *Subject:* Re: [NSRCA-discussion] Two killed by model airplane
>
>
> I have oft wondered if an "ignition CUT off" that sensed loss
> of RX decoder outputs that would KILL the motor wouldn't
> help. It would at least mitigate the energy of the impact.
> Never heard of one out there that works exactly like I'm
> describing, and it would probably only be effective for
> gassers at this stage, but it may REDUCE the degree of injury.
>
> I fear full DUAL RF_Link redundancy in our future....
>
> Bob Pastorello
> www.rcaerobats.net <http://www.rcaerobats.net/>
> rcaerobob at cox.net <mailto:rcaerobob at cox.net>
>
> ----- Original Message -----
> *From:* brett terry <mailto:brett.terry at gmail.com>
> *To:* NSRCA Mailing List
> <mailto:nsrca-discussion at lists.nsrca.org>
> *Sent:* Sunday, May 21, 2006 12:39 PM
> *Subject:* Re: [NSRCA-discussion] Two killed by model airplane
>
>
> Lest we forget, or become careless because of the relative
> size of our planes to the 50% scale Pitts that killed the
> people in Hungary, remember a young girl was killed in
> China a few weeks ago by a 21-size trainer.
>
> Like you said, it is only a matter of time. We must
> always be wary of the danger, and make sure everybody at
> our fields also follow safe practices.
>
>
> On 5/21/06, *Ed Miller* <edbon85 at charter.net
> <mailto:edbon85 at charter.net> > wrote:
>
> Having just spent a week at the Joe Nall event it is
> clear to me it is only a matter of time before a
> similar tragedy happens here in the US.
> Ed M.
> ----- Original Message -----
> *From:* mike mueller <mailto:mups1953 at yahoo.com>
> *To:* NSRCA Mailing List
> <mailto:nsrca-discussion at lists.nsrca.org>
> *Sent:* Sunday, May 14, 2006 11:10 PM
> *Subject:* Re: [NSRCA-discussion] Two killed by model
> airplane
>
>
> Sad news,it should remind us that were only a serious
> accident away from potentially being grounded. We can
> all say that we fly safe and yada yada yada but if the
> radio fails it could be a disaster. Man I hope this
> doesn't happen again. I once witnessed a young girl
> getting hit by a plane in the 70's and it still haunts
> me.
> --Mike
> */Doug Cronkhite <seefo at san.rr.com
> <mailto:seefo at san.rr.com>>/* wrote:
>
> Yep.. 4 others were injured. Looks like it was a
> 3W Pitts Model 12 that crashed. The pilot was
> arrested by police at the scene..
>
> -Doug
>
>
>
> ------------------------------------------------------------------------
> *From:* nsrca-discussion-bounces at lists.nsrca.org
> <mailto:nsrca-discussion-bounces at lists.nsrca.org>
> [mailto:nsrca-discussion-bounces at lists.nsrca.org
> <mailto:nsrca-discussion-bounces at lists.nsrca.org>]
> *On Behalf Of *Ed White
> *Sent:* Sunday, May 14, 2006 7:50 PM
> *To:* NSRCA Mailing List
> *Subject:* [NSRCA-discussion] Two killed by model
> airplane
>
> Yikes.
>
> http://english.mti.hu/default.asp?menu=1&theme=2&cat=25&newsid=219887
> <http://english.mti.hu/default.asp?menu=1&theme=2&cat=25&newsid=219887>
>
>
>
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>
> --
>
> Keith Hoard
> Collierville, TN
> khoard at gmail.com <mailto:khoard at gmail.com>
>
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