Re: [RCSE] ESC for S400 (off subject)
You should never operate an electric motor in a model without an arming switch. It saves your fingers by allowing you to be absolutely sure you are ready to start the motor. There are two ways in which an electric motor can be more dangerous than an infernal combustion engine: 1: When an IC engine is running there is a horrible noise letting you know it is running. (This still doesn't stop some people from getting their fingers chopped) 2: It takes a certain amount of deliberate action to get an IC engine running, ie connecting a glow driver, flicking the prop etc. Once you have activated the arming switch on your electric all you have to do is push the throttle stick forward and your stationary prop is suddenly spinning. On my one ESC, just activating the arming switch while the throttle stick is forward starts the motor. Very dangerous! If your ESC did not have an arming switch then simply turning on your receiver would start the motor if the throttle stick was forward. So the correct sequence of starting an electric model is:1, switch on the TX, 2, switch on the RX, 3, wiggle your sticks and OBSERVE, 4, hit the arming switch, 5, advance the throttle. Regards Richard Knott - Original Message - From: Tim Vandenheuvel [EMAIL PROTECTED] My question is, is the arming switch available on many of the ESC's more truble than they are worth? It seems more like a hassle than anything. A simple on/off switch seems quite adequite. I just hate to see more than the bare essentials on the outside of the airframe (switches, jacks, etc.). Any input would be greatly appreciated, Pardon my off-topic post, but there are only a few resources in the area. This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager ([EMAIL PROTECTED])
Re: [RCSE] tip aileron theory (was 6 servo+stylus)
Good full-scale practice, once centered in the thermal, is to simply check whether the thermal has a much faster core by making tighter coordinated turns (obviously with steeper bank angle) for a couple of turns and see if the variometer indicates a higher rate of ascent. If so, try turning even tighter, until no further gain is made. You're finding the point where the losses in the vertical lift component caused by the steeper bank are no longer outweighed by centering tighter into the fastest part of the core. Detecting this increased rate of ascent in a model is another story, unless you have a vario. The upshot is: efficient coordinated turns are most important, and each thermal / sailplane combination has its own ideal bank angle. Regards Richard Knott Bell Equipment Co. South Africa Wheeled Loader Marketing, Specials Aftersales Support +27 (35) 907 9325 (ph) +27 (35) 907 9611 (fax) +27 (0) 82 775 8061 (mobile) This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager ([EMAIL PROTECTED])
Re: [RCSE] Wanted: JR 8013 Buddy Box
Do you want all the 8103 functions on the buddy box? If you do you'll need another 8103. But if you only need for instance 4 channels then you only need a 4 channel JR buddy box. Only caveat is you need to let your pupil hold your 8103 while you hold his cheaper box (Which must also have a trainer switch). Regards Richard Knott - Original Message - From: James Osborn [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, October 21, 2001 9:10 PM Subject: [RCSE] Wanted: JR 8013 Buddy Box I'm looking for a JR Tx that will work as a slave trainer Tx to my JR 8103. My manual implies any JR with PPM and a DSC jack will work. Can anybody confirm this? Does anybody have an old JR Tx that will work for this that they want to sell cheap? -- James .-_--. James R. Osborn * [EMAIL PROTECTED]| \/ \ | Up and Running LLC * http://www.upandrunningit.com |-. \ _ /\\_/ | Computer and Information Technology Support | '-.\ / \\/| (510) 377-4514 Office * (510) 232-2575 Fax| ' \_/ | `' RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager ([EMAIL PROTECTED])
Re: [RCSE] Fw: Scale Soaring List JR TX Module
Hi, you only need a new frequency module (and receiver)if you are changing frequency bands, say from the 72MHz band to 35MHz. If you are changing from one 72MHz channel to another you only need to change thecrystals. Regards Richard Knott Bell Equipment Co. South AfricaWheeled Loader Marketing, Specials Aftersales Support+27 (35) 907 9325 (ph) +27 (35) 907 9611 (fax) +27 (0) 82 775 8061 (mobile) - Original Message - From: Gerry Harrison To: [EMAIL PROTECTED] Sent: Wednesday, August 22, 2001 7:44 AM Subject: [RCSE] Fw: Scale Soaring List JR TX Module - Original Message - From: Gerry Harrison To: [EMAIL PROTECTED] Sent: Tuesday, August 21, 2001 8:51 PM Subject: Scale Soaring List JR TX Module Gents, I own a JR 8103 DT TX and am somewhat confused on the module purpose at this point. The JR manual informs the owner that if a frequency change is required you simply change the module with I suppose the new frequency ( manual is not that clear ). If you visit the Horizon Hobbies website the module and crystal set are sold separately. My question, is the JR TX module tuned to the appropriate TX crystal or can one put any frequency in the module with success. I have seen scale pilots change frequencies on the JR 8103 module by merely switching crystals...according to MY manual and meager understanding this is not the correct procedure. Anyone have a clear understanding of this situation. Regards Gerry Harrison==^ EASY UNSUBSCRIBE click here: http://topica.com/u/?a84vUU.a9hx3w Or send an email To: [EMAIL PROTECTED] This email was sent to: [EMAIL PROTECTED] T O P I C A -- Register now to manage your mail! http://www.topica.com/partner/tag02/register ==^ * This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by Fprot for the presence of computer viruses. mail.bell.co.za **
Re: [RCSE] Speed control
Hi Dave I have the same problem using a 555 Rx and a JR 8103. This will not operate a Ballasch OSC-4 speed controller and Speed 700 motor. Everything works fine though with a JR Rx. Looks like the 555 Rx doesn't like speed controllers. Comments anyone? No other problems with the 555. Regards Richard Knott Bell Equipment Co. South Africa Wheeled Loader Marketing, Specials Aftersales Support +27 (35) 907 9325 (ph) +27 (35) 907 9611 (fax) +27 (0) 82 775 8061 (mobile) - Original Message - From: Dave Seay [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, July 29, 2001 9:42 PM Subject: [RCSE] Speed control I just got a Koleos from ICARE and have run into a problem. I have emailed them but it will probably be a while before I hear from them and I am not expecting a good answer. I had things electrically hooked up, with the motor in the plane and it ran fine when I tested it. I continued working on servos, etc. and when I came to final testing, the motor would not run. After looking all over, I finally realized that 1 of the 3 leads from the Rx to the speed control had broken (the orange, signal lead). I noted the color of each connection, removed all three, cleaned out the holes, resoldered the leads and ...nothing. The battery, when touched to the motor leads fires up the motor fine. With everything hooked up, both v-tail servos work but not the motor/controller. I can even put a servo in ch 3 on the 555 Rx and it responds correctly to the throttle stick. When I put the controller lead back in ch 3, nothing. The battery reads 9.1v using a loaded volt meter. I also tried 2 different 555 Rx's. Is there anyway I can confirm that the controller is dead before I replace it? Dave RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] * This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by Fprot for the presence of computer viruses. mail.bell.co.za ** RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] B52 crash, was Amazing Jet Photo's and Movies
Tom Watson wrote: Anyone know the story and date behind the B-52 crash on this site? If this is the incident I am thinking about, the cause of the crash was simply pilot arrogance. TIME magazine ran an article a couple years ago which included a photo sequence which looks identical to this video. The article was discussing nepotism in the US armed services, and how the USAF's only serving female B47 pilot was fired for an adulterous affair, while blatantly dangerous pilots were still being permitted to fly. The B52 pilot in question, a general I believe, had over several years built up a reputation as a reckless show-off, to the extent that many flight crews were refusing to fly with him. Complaints had been lodged against him, and his superiors were aware of his attitude, but nothing was done about it, too much of the 'old boys club'. Until this accident, when he killed his entire flight crew instead of just himself. Regards Richard Knott Bell Equipment Co. South Africa Wheeled Loader Marketing, Specials Aftersales Support +27 (35) 907 9325 (ph) +27 (35) 907 9611 (fax) +27 (0) 82 775 8061 (mobile) ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.bell.co.za ** RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Dual/single conversion crystal identification
G'day all I've bought a 2nd hand Hitec 555 Rx on the 35MHz band with no crystal. I have a 35.010 crystal, supposedly a Hitec, but I can't tell whether it is a dual or single conversion crystal. A dual is required. The crystal is labelled 35.010RA CH61. Anyone able to ID this as dual or single conversion? What is the difference anyway? Regards Richard Knott Bell Equipment Co. South Africa Wheeled Loader Marketing, Specials Aftersales Support +27 (35) 907 9325 (ph) +27 (35) 907 9611 (fax) +27 (0) 82 775 8061 (mobile) ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.bell.co.za ** RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] There's nothin' like a nice hot winch
Sounds like arcing from a loose battery connection. I've seen this cause a screw terminal to melt completely off the lead bus bar (or whatever you want to call it) inside a battery from this. This is on a battery which has M8 male screw terminals instead of the usual lead stub. Spot welding works on this principle: good connection between the electrodes and the two plates so no arc there, poor connection between the two plates being welded, gives a momentary arc and you have a weld. Regards Richard Knott Bell Equipment Co. South Africa Wheeled Loader Marketing, Specials Aftersales Support +27 (35) 907 9325 (ph) +27 (35) 907 9611 (fax) +27 (0) 82 775 8061 (mobile) ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.bell.co.za ** RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Kevlar vs Spectra for pull-pull systems.
May I recommend using Kevlar rather than Spectra / Dyneema for pull-pull systems. Although Spectra / Dyneema (different brand names for the same fibre) has a slightly higher strength to weight ratio than Kevlar it tends to 'creep' under load, causing loss of tension. That is why on some super high-performance unlimited budget dinghies you'll find Kevlar used on the forestay and shrouds, because they are always under tension, and Spectra for the trapeze wires as they are only temporarily under load. Ths is probably also why we don't see Spectra used anymore in composite layups. On the other hand, Spectra displays better fatigue properties than Kevlar. In tests on rock-climbing equipment it was found that Spectra lasted longer in a test where a rope emerging through a hole in a piece of equipment was repeatedly bent 90 deg. the one way, then the other. I forget the exact results,but it must have been thousands of cycles. Braided Kevlar line in several thicknesses is available from fresh-water fishing stores. The whole point may be moot, depending on how close to the load limit of the fibre it has been tensioned. Regards Richard Knott Bell Equipment Co. South Africa Wheeled Loader Marketing, Specials Aftersales Support +27 (35) 907 9325 (ph) +27 (35) 907 9611 (fax) +27 (0) 82 775 8061 (mobile) ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.bell.co.za ** RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] RE:Hey you Geometry Brains, question about servo mounting
Hello Gordy Burying your servo deeper (higher) into the wing raises the front end of the pushrod, causing the pushrod angle to change. To get exactly the same servo/control surface action as if the servo were flush to the bottom of the wing you should rotate the control horn mounting through the same angle, rotating about the centre of the hinge, so that the angle between the pushrod and the line of holes in the horn (which should point at the hinge pin) remains the same. But that's if you had optimised the pushrod/horn angle in the first place. (aileron horns and output arms pointing forwards, backwards for the flap horns and arms, and fine tuned) The worst case would be with a deep section wing and short pushrods. With a shallow molded wing the pushrod angle would probably change very little, causing no measurable change, the way most modellers fit their gear. You may be a perfectionist though. I'm sitting late at work designing a self-dumping wheeled loader bucket system, rotating hydraulic cylinders and their lines of action all over the place on CAD, so I guess this discussion is kinda pertinent to me at the moment. :-) Regards Richard Knott Bell Equipment Co. South Africa Wheeled Loader Marketing Specials +27 (35) 907 9325 (ph) +27 (35) 907 9611 (fax) +27 (0) 82 775 8061 (mobile) [EMAIL PROTECTED] wrote: In a message dated 6/6/00 1:19:16 PM Eastern Daylight Time, Raschow writes: How does it affect the throw and power of the servos, both having the same two hole arm and the wing is about 1" deep. the flap horn about 1/2" high? Not at all - length of servo arm and length of flap horn to the hinge are what are important - these don't change with which skin is used for anchoring the servo. Thanks for you comments, Since I have done so many foam cores and the servos end up flush with the bottom, I assumed that it was the 'correct' way to mount them. But lots of guys with moldies seem to be just gluing the servo to the top skin, deep inside the wing. They still just use the 2 hole horn. Math isn't my thing, so I figured I would ask some of the engineer types out there. Anyway, I have been shimming my servos in the moldies to bring them flush with the bottom skin like my bagged ships figuring that was the 'correct' thing to do. To me it seems like the servo mounted in deep would be pulling against the hinge line, trying to pull the flap service forward into the wing, instead of up in a rotation. What do you think? Gordy ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. www.bell.co.za ** RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Algebra 3.2 decalage please
Hi All I have a heavy-ish 3rd hand Algebra 3.2 (ailerons spoilers) with all-flying tailplane which I am finding difficult to trim out. Can anyone help me out with a recommended CG and decalage angle please? S3021 airfoil I think. Thanks Richard Knott BELL Equipment Co. South Africa Wheeled Loader Marketing, Specials Aftersales Support +27(0)351 907 9325 (direct) +27(0)351 907 9611 (fax) +27(0)82 463 5856 RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Solo winching (was No Throw Launch)
Winching solo, i.e. holding the Tx, standing on the winch pedal and throwing the model yourself is fine with lighter models as little "body language" is required to toss the model at flying speed. However with heavier models I find that if I can't "wind up" my throw and follow through I get a pathetic throw. I mean, if I have to keep both feet on the ground (one on the pedal) I can't throw properly. So for the moment I agree with Kjell-Arne and use the rise off ground technique like the scale boys. No worry about one wing starting low - ground effect quickly lifts it. Just take off from off to the side so a wing can't go under the return line. Much less anxiety! Looks really graceful too. Solo Hi-starting is easier but you can't stop it if something goes wrong. I tend to disagree that one can use line tension to fully compensate for a weak throw. Things happen too fast with lots of pre-tension for me. If you have really fast reflexes, maybe. But hey! I'm a hack flyer, maybe one day I'll get the technique together. :) Oh yes, be careful who you allow to throw your models for you. One friend who threw for me forgot everything once tension was on and I said "go." He galloped excitedly several paces down the runway and then enthusiastically flung the Algebra up at about 45 degrees and about 20 degrees to the side...tipstall...inverted model 10 metres up...foot off pedal...survived. Hi-start would have been catastrophic. My 2 cents worth. :) Regards Richard Knott BELL Equipment Co. South Africa Wheeled Loader Marketing, Specials Aftersales Support +27(0)351 9079325 (direct) +27(0)351 907 9611 (fax) +27(0)82 463 5856 RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Spooling on new winch line?
Walk the line out to its full length, through the turnaround if necessary, and attach the parachute, so that you end up with the full length laid out as if you were ready to launch. Don't try to wind it straight off the reel it is supplied on. My winch has a dent in it from when the 'chute hooked a 4-pound hammer... Scary, a high-speed hammer. If your line is supplied in loose coils like the Shogun monofilament try to place the coils over a large diameter piece of pipe first. Regards Richard Knott Tracy Coulson wrote: I am trying to safely spool on new winch line. Can anybody recommend a proper method? Len RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
