Re: [RCSE] Lost model alarm challenge
Thank heavens for guys like Simon, Rob Crockett, Harley, Dr. Drela and others who continually share their knowledge and designs with the rest of us neophytes! Rob's design is time tested and even has some pretty pictures: http://www.ncws.com/rcrock/shepherd.htm his others are here: http://www.ncws.com/rcrock/electron.htm he is even kind enough to teach us rudimentary PCB fabrication: http://www.ncws.com/rcrock/makepcb.htm Kevin At 08:28 PM 1/8/2004 -0800, Simon Van Leeuwen wrote: These alarms look at the pulse width (100-200ms - 150ms considered neutral), any time the signal is non-existant or exceeds this value (20-30ms each side) the circuitry sends current to the alarm (in most cases, a piezo buzzer). No re-design is not required. All one has to do is supply the alarm with it's own power supply, in this case the appropriate number of lithiums in series to provide adequate voltage to power the piezo. Herein lies the problem. Typical primary (not rechargeable) Maganese Dioxide Lithium batteries put out relatively low current. But those which are considered high current will satisfy the demands of a typical piezo. A candidate would be a Sanyo PN 2CR5, but the size/weight may be an issue (mm: 34L x 17W x 45H @ 40g). THis unit is 2 cylindrical cells in series producing 6V with a max continuous discharge of 1.5A Of course there are smaller hi-perf Lithium cells, but their O/P would have to be tested against the piezo being used (or get the current specs for the piezo). Now the easy part. All that is required to modify your existing alarm is to remove the positive lead from the pigtail that goes to the RX. Now attach the Lithium pack to the alarm in such a way as to survive the crash. Attach the positive(+, red) lead to the positive terminal of the battery. Tap into the negative(-, black) going to the RX, and attach it to the negative side of the pack. Before you do this, buy a small switch and put it in that negative lead. The smaller the better, the idea being in a crash even the switch can be moved to the off position due to the impact. That's it. Tha alarm will see the pulse width when the servo is on (singnal lead and GND), but will have it's own PWR supply if things go awry. Chris Veitch wrote: Guys A number of vendors make these that plug into the RX and make a noise when the TX is off/out of range, I have one. Very useful if you land in very long grass on the slope in a reasonable manner. Fortunately (touch wood) I have not had any problem landings at a distance for some time. In the days when I was learning or had some technical issue the landing out normally involved some amount of higher landing speed. This frequently leads to a movement of kit in the place which can disconnect components from the power source. Therefore are there any vendors out there that can build one that would carry a lithium watch style battery as a power source and preferably be thin so that it would emit a noise if the TX was off or if it had no power from the RX. I think this would require electronic arming by switching the RX on and an off button on the unit. Sounds like it could be a YNT project ?? Any takers ?? Regards Chris Chris Veitch UK -- *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~* Simon Van Leeuwen, Calgary, Alberta RADIUS SYSTEMS Cogito-Ergo-Zoom IAC25233*MAAC12835*IMAC1756*LSF5953*IMAA20209 *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~* RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
RE: [RCSE] Lost model alarm challenge
Chris, I think this could be fairly easily accomplished with the existing BC6 Flight Monitor. I'll have a closer look into it and see what's available for a battery holder. -Sheldon- YNT uDesign A Soaring Nationals Supporter
[RCSE] Stylus Wiring
While out flying last week I started experiencing radio problems. Wiht my two channel hand launch while flying smoothly, it would suddenly yaw to the right. I could correct it by adding some left stick. After three or four of these mild glitches I came home and narrowed it down to the transmitter. While inspecting the wiring I found the smallest little crack in the vinyl on one of the wires to the aileron pot. These wires are glued down and right at the end of the glue was my broken lead. I trimmed and re-attached the original lead but that cost me last years TD plane, 40 feet up on final it spiralled in to the right with a completely severed wire. Then I fixed my transmitter correctly replacing the wire entirely and I have had no further problem. I just wanted to warn you guys that the wiring inside your radio is not completely without stress. I have had this radio for two years and fly 2 to 3 times a week. Happy New Year! Thermals. Steve RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
[RCSE] Super Griffen Plans
Hello, I was wondering if someone might have plans or the construction booklet or both for the Bob Martin Super Griffen. Please reply privately to Steve at [EMAIL PROTECTED] Thank you! RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
Re: [RCSE] Re: F3J Denver team try outs...
Really appreciate that you appreciated. Another member of RMSA--steve -- flyingdogtwo --- Posted from the RCGroups.com Discussion Forums. Visit us at http://www.rcgroups.com --- Win free R/C Gear! View this thread at rcgroups.com: http://www.rcgroups.com/forums/showthread.php?threadid=186605 RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
Re: [RCSE] Nyx F3J rearward CG location
Thank you Ron, your feedback is great and it's just the info I was looking for. I'm going to skip the 4.3 location and move straight to a 4.4 CG. Then I'll fly it that way for a while and decide if it needs to be re-adjusted again at that time. Best to you, Mehrdad ps: Sorry for my double post on the same topic (and any confusion it may have caused, and any extra bandwidth it consumed) -- just that when I submitted the first message Wednesday morning it didn't show up all day. By Wednesday evening I noticed my original post from Wed AM had not been posted, so I re-drafted another message and posted a 2nd time Wed night. --- In [EMAIL PROTECTED], rmong [EMAIL PROTECTED] wrote: Mehrdad, I have flown 2 Nyx's (F3J, LT) both at 4.5 behind the LE. For me this plane really came alive at this CG. That said, you need to be careful with the plane tucking, a good centering servo on the elev. helped me out. Keep the Nyx moving between thermals, a little full span camber while thermaling. One of the best turning planes I've ever flown. I think a 4.45 or 4.4 cg location would be safer to use at great distances. Best Ron Mong Columbus, OH - Original Message - From: Mehrdad Amir [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, January 07, 2004 10:46 AM Subject: [RCSE] Nyx F3J rearward CG location In light lift thermal soaring conditions...what are your opinions wrt having a rearward CG for the Nyx? (by rearward CG, I mean any location behind 4.2 inches of the wing root's LE) Personally, I started out with the CG on my Nyx around 4.1 inches. It was good, but I liked the way it flew better when I moved the CG to the 4.2 inch location (as recommended on Tom's F3x.com site). Of course, I'm now wondering how far back I could take the CG before it adversely affects flight performance. Does anyone fly their Nyx with the CG set around 4.5 inches behind the wing root's LE? Thanks in advance, Mehrdad RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
Re: [RCSE] Rearward CG for Nyx F3J - CORRECTION
Please note that earlier I wrote: I moved the Nyx CG from 4.1 to 4.2 inches the next time I went to fly it. After a couple of flights, I confirmed that the Nyx was not a bit talkative than before I meant to write I confirmed that the Nyx was now a bit more talkative than before Sorry for the confusion... RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
Re: [RCSE] Re: Re: New Wing Bag Supplier and its pretty awesome for the price!
glen go to search and punch in AVA then go to the Charlie Britt thread. you will find pictures of my build. i am not finished yet, flying is 2-3 weeks away. i am really impressed with this glider. Charlie -- CHARLIE BRITT 7 charlie francis --- Posted from the RCGroups.com Discussion Forums. Visit us at http://www.rcgroups.com --- Win free R/C Gear! View this thread at rcgroups.com: http://www.rcgroups.com/forums/showthread.php?threadid=186609 RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
Re: [RCSE] Rearward CG for Nyx F3J
Hi Walter, Thanks for sharing your experience about CG settings. I tell you flying them both back to back it was like night and day!! Of course, this was because the Nyx was a bit nose heavy and the Extreme was tail heavy. The first time the Extreme was hand tossed, I could immediately tell the CG was pretty far back for my flying style. Actually, for my flying style it was pretty darn hairy, so I added some down elevator and re-tossed again. It felt better and I was comfortable enough to try a winch launch at that point. After flying the Extreme a few times it was easy to observe that the ship was talking to me much more so than the nose-heavy Nyx had been -- in fact the DPR seemed to talk very loudly and be a bit edgy. I liked the feedback, but not the constant correcting that was needed. When I got home, I decided to compare the CG referenced in the Xtreme F3J review article in SE Modeler with the Extreme DPR I got from you. The article mentioned a CG of 107mm for the Eraser Xtreme (v-tail). I measured the Extreme DPR's CG to be around 130mm. Wow that's what I said, really. I moved the Nyx CG from 4.1 to 4.2 inches the next time I went to fly it. After a couple of flights, I confirmed that the Nyx was not a bit talkative than before (but still not quite like the Extreme has been). So for the next outing (this Saturday), I plan to move the Nyx CG to around 4.4 inches and take it from there. And I plan to move the Extreme's CG to around 120mm and see if I like that better. Well, that's my story and I'm sticking to it. Regards, Mehrdad btw, as far as the Sharon Pro 3.7 V-tail that Don got from you, I wasn't there for the maiden so I don't have all the details, but apparently something bad happened during the 4th or 5th winch launch. The nose of the Sharon fuse met terra firma without invitation. Details and pics posted here if interested: http://www.bayrc.com/boards/viewtopic.php? t=468start=0postdays=0postorder=aschighlight=sharon Though the fuse may be repairable, I think Don has/will be ordering a X-tail fuse for it (what can I say, he loves that ship). --- In [EMAIL PROTECTED], gldr guy [EMAIL PROTECTED] wrote: Hey Mehrdad. Not sure about the NYX and dont really use the dive test. On a new plane I just keep moving the Cg back til its uncomfortable for me to fly then add a little weight back in the nose. When I get really comfortable with that I do the whole thing over again. I find for me it takes a month or so, depending on how much I fly to really get the Cg fine tuned for my flying style. I also dont set in stone the exact Cg. If I am having to fly waaay out to my visibility limits for lift I may even move it forward a bit. This is how I set the Cg on your Extreme and it seems work for me. Id even venture to say if you did dive test it would be pretty neutral. BTW, is the Sharon really gone??? Tell me it aint so! Walter --- GG On Thu, 08 Jan 2004 07:05:40 Mehrdad Amir wrote: I'm curious what CG location Nyx TD pilots are using. Especially in days where there's light thermal condition days. Also Initially the CG on my Nyx was set to around 4.1 inches back from the wing root's LE, and it flew nicely in light conditions. Since I moved the CG back to 4.2 inches from LE (as recommended by Tom Copp's F3X website) it appears to be flying better than before. So now I'm wondering how much further back I should try. Will setting the CG 4.5 inches from wing root's LE -- be just too far back? Thanks in advance, Mehrdad RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Get 25MB of email storage with Lycos Mail Plus! Sign up today -- http://www.mail.lycos.com/brandPage.shtml? pageId=plus RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
