RE: [RCSE] What are you doing to kill 5125/168 servos?
Barry is right, 6Vvs. 4.8V has nothing to with servo life. More folks are flying 6V now than probably anytime, and from what the guys have told me at JR, our servos can handle voltages much higher than 6V. Marc 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
You had a full carbon Pike. Phil had one of the ligther ones. The problem is the layup on the really light ones just isn't suited to a zoom in the wind. Marta Zavala wrote: Ive hit my F3J full carbon Pike very hard in a breeze during launch and have yet to experience any control surface flutter. I dont go really deep into the bucket on zoom though, especially in wind. Not because of the wing flutter issue Phil experienced, but because it seems to me a short quick zoom/ping off the line always results in higher launches for me. Ride that zoom deep into the bucket and perhaps youve lost much of that stored line energy? Plus you may just flutter your wing off. Just my stupid opinion. Walter - Original Message - From: Phil Barnes [EMAIL PROTECTED] To: Soaring Exchange soaring@airage.com Sent: Wednesday, December 28, 2005 6:03 AM Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? - Original Message - From: Tom Watson [EMAIL PROTECTED] what are you guys doing to kill the flat wing servos? Ford Long shaft winch, strong winch battery, short (600ft?) 240 lb test braided winch line, no retriever, bit of a breeze. All of that in combination with an agressive (even abusive), unpracticed launch style that generally involved diving too deeply on the zoom and most importantly a model with very heavy ailerons that had a strong tendency to flutter. Just ask anybody that attended last June's LISF (Long Island Silent Flyers) contest. They will tell you what a Pike Superior SL sounds like when the ailerons are fluttering so violently that the entire wing is twisting to very odd angles. This happened repeatedly even after switching to DS368 servos. The HS5125s stripped on the first launch. The DS368s survived a few of those launches although the lighter servo arms did not survive, the servo mounts did not survive and finally, after going beefy on the servo arms and on the servo mountings, the control horns in the ailerons ripped out. I kept trying to beef up the aileron servos and mountings because I was stuck on Long island with only the Pike to fly and it was my mind-set that molded models were buy and fly and the Pike was an F3J model that should be able to handle any launch you can give it. It isn't pulling hard on launch that strips the gears. With the Pike Superior SL it is the going really fast that does the trick. The biggest problem on that particular model seamed to be that the ailerons were really heavy which is bad from a flutter perspective. David Hobby (current F3J world champion and Pike flyer) suggested using longer horns on the ailerons. I never tried that since I sold the model first. Phil 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format . 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
Last night Cal Posthuma and I were discussing the situation with the smaller digital servos. We've never had problems with them however, one of our fellow flyers did. He was using a larger battey pack, I think it was a 6 volt, to get more zip out of the contol surfaces and burned out some servos. We have been using the standard 4.8 volt with no problems. Dennis Hoyle WMSS Treasurer / Sec / Web Geek www.rcsoaring.org
Re: [RCSE] What are you doing to kill 5125/168 servos?
You don't say what servos were fried with 6V. I run 6V, as do many others, on DS368s and DS168s with no problem for two seasons. I have the 168s on ailerons on an Icon with RDS. Tight, no slope, no problems. Barry Andersen Cincinnati Soaring Society On Dec 29, 2005, at 8:58 AM, [EMAIL PROTECTED] wrote: Last night Cal Posthuma and I were discussing the situation with the smaller digital servos. We've never had problems with them however, one of our fellow flyers did. He was using a larger battey pack, I think it was a 6 volt, to get more zip out of the contol surfaces and burned out some servos. We have been using the standard 4.8 volt with no problems. Dennis Hoyle WMSS Treasurer / Sec / Web Geek www.rcsoaring.org 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
Did he ever measure the current draw on his model. If you have binding surfaces, you are going to be pumping a lot of current through the servos constantly. A 6-servo model at idle should be under 100 ma total. [EMAIL PROTECTED] wrote: Last night Cal Posthuma and I were discussing the situation with the smaller digital servos. We've never had problems with them however, one of our fellow flyers did. He was using a larger battey pack, I think it was a 6 volt, to get more zip out of the contol surfaces and burned out some servos. We have been using the standard 4.8 volt with no problems. Dennis Hoyle WMSS Treasurer / Sec / Web Geek www.rcsoaring.org 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
Thats exactly why I chose full on carbon version. None the less, under the right conditions with a heavy foot I suppose one could flutter the wing off of it as well. I know they are strong, but to me still scary, grab the wing too hard, and believe me it isnt that hard, they exhibit a crispy/crunchy sound ala the snap, crackle, pop of Rice Krispies! That concerns me. My Icon never did that. I would sell it except nobody seems to want a excellent condition Pike anymore, especially with Barry bringing in the Supra now. If it does decent at the worlds maybe there will be some renewed intrest then I could dump the thing. Walter - Original Message - From: Michael Lachowski [EMAIL PROTECTED] To: Marta Zavala [EMAIL PROTECTED] Cc: Phil Barnes [EMAIL PROTECTED]; Soaring Exchange soaring@airage.com Sent: Thursday, December 29, 2005 6:35 AM Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? You had a full carbon Pike. Phil had one of the ligther ones. The problem is the layup on the really light ones just isn't suited to a zoom in the wind. Marta Zavala wrote: Ive hit my F3J full carbon Pike very hard in a breeze during launch and have yet to experience any control surface flutter. I dont go really deep into the bucket on zoom though, especially in wind. Not because of the wing flutter issue Phil experienced, but because it seems to me a short quick zoom/ping off the line always results in higher launches for me. Ride that zoom deep into the bucket and perhaps youve lost much of that stored line energy? Plus you may just flutter your wing off. Just my stupid opinion. Walter - Original Message - From: Phil Barnes [EMAIL PROTECTED] To: Soaring Exchange soaring@airage.com Sent: Wednesday, December 28, 2005 6:03 AM Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? - Original Message - From: Tom Watson [EMAIL PROTECTED] what are you guys doing to kill the flat wing servos? Ford Long shaft winch, strong winch battery, short (600ft?) 240 lb test braided winch line, no retriever, bit of a breeze. All of that in combination with an agressive (even abusive), unpracticed launch style that generally involved diving too deeply on the zoom and most importantly a model with very heavy ailerons that had a strong tendency to flutter. Just ask anybody that attended last June's LISF (Long Island Silent Flyers) contest. They will tell you what a Pike Superior SL sounds like when the ailerons are fluttering so violently that the entire wing is twisting to very odd angles. This happened repeatedly even after switching to DS368 servos. The HS5125s stripped on the first launch. The DS368s survived a few of those launches although the lighter servo arms did not survive, the servo mounts did not survive and finally, after going beefy on the servo arms and on the servo mountings, the control horns in the ailerons ripped out. I kept trying to beef up the aileron servos and mountings because I was stuck on Long island with only the Pike to fly and it was my mind-set that molded models were buy and fly and the Pike was an F3J model that should be able to handle any launch you can give it. It isn't pulling hard on launch that strips the gears. With the Pike Superior SL it is the going really fast that does the trick. The biggest problem on that particular model seamed to be that the ailerons were really heavy which is bad from a flutter perspective. David Hobby (current F3J world champion and Pike flyer) suggested using longer horns on the ailerons. I never tried that since I sold the model first. Phil 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format . 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
Agreed, operating at the higher voltage requires more careful consideration. I have seen situations where 5125's smoked when the control surfaces hung up because of the wiper, or two 5125's were operating a single surface but in the opposite(!) directions during set-up (more smoke), crashes where the servos was being stalled and started smoking, etc (don't meander making your way to a crash site). They will not tolerate this for an extended length of time, nor do other similar servos under similar circumstances. No one can expect servos to stand this sort of abuse, more importantly it certainly is not the servos fault. I elect to supply 5cell voltage to all my 5125's and similar sized servos and larger because of the significant performance gains. A servo that can resist uncommanded mowement sooner will impact directly on control surface position and potential flutter. The frequency at which flutter may occur is pushed higher the more restricted the movement of a control surface. It's also a misnomer that these servos are mechanicaly or electrically ill-equipped to handle the voltage of a typical 5cell NiCD pack. After many years in many different types of aircraft and all the brands available, I have yet to experience anomalies of any sort that could be attributed to operating at the higher voltage recommended by the manufacturer. Folks can elect to install a regulator if it makes them feel better, but the introduction of a linear-based power dissipating IC between the source and load without redundancy is (electrically) not for me. The current quality of servos available to us from all marques continue to improve. Singling out a marque and calling it crap as someone stated just leads to a silly pissing contest and clouds the issue. It's easier to install a fatter servo like the 368, as there is less chance of a problem precisely as a result of it being beefier. Let's not confuse the issue by diminishing the abilities of the thinner servo. Again...it is not the servos fault! [EMAIL PROTECTED] wrote: Last night Cal Posthuma and I were discussing the situation with the smaller digital servos. We've never had problems with them however, one of our fellow flyers did. He was using a larger battey pack, I think it was a 6 volt, to get more zip out of the contol surfaces and burned out some servos. We have been using the standard 4.8 volt with no problems. Dennis Hoyle WMSS Treasurer / Sec / Web Geek www.rcsoaring.org -- Simon Van Leeuwen RADIUS SYSTEMS PnP SYSTEMS - The E-Harness of Choice Cogito Ergo Zooom 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
The 5125 is advertised as having the unbreakable MP gear train. When I did an autopsy on my 5125, that specific gear was in tact. The one next to it, however, was stripped, and it was metal. This happened with a number of other pilots in our club. Our conclusion was that there had to be a poor quality metal for the batch of servos we received. I have heard folks say that they have had good runs with this servo and I'm sure it is true. Maybe their was a time period in which a lower grade metal was used? None of them had motor problems; all had stripped gears. We were not landing them hard, but maybe the holding power works against them in a solid installation. The gear train was the first to give. JE -- Erickson Architects John R. Erickson, AIA From: Simon Van Leeuwen [EMAIL PROTECTED] Organization: Radius Systems Date: Thu, 29 Dec 2005 11:37:15 -0800 To: [EMAIL PROTECTED] [EMAIL PROTECTED] Cc: soaring@airage.com Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? The current quality of servos available to us from all marques continue to improve. Singling out a marque and calling it crap as someone stated just leads to a silly pissing contest and clouds the issue. It's easier to install a fatter servo like the 368, as there is less chance of a problem precisely as a result of it being beefier. Let's not confuse the issue by diminishing the abilities of the thinner servo. Again...it is not the servos fault! 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
In these cases, I'm would expect an OEM to stand behind their product. Did they? John Erickson wrote: The 5125 is advertised as having the unbreakable MP gear train. When I did an autopsy on my 5125, that specific gear was in tact. The one next to it, however, was stripped, and it was metal. This happened with a number of other pilots in our club. Our conclusion was that there had to be a poor quality metal for the batch of servos we received. I have heard folks say that they have had good runs with this servo and I'm sure it is true. Maybe their was a time period in which a lower grade metal was used? None of them had motor problems; all had stripped gears. We were not landing them hard, but maybe the holding power works against them in a solid installation. The gear train was the first to give. JE -- Erickson Architects John R. Erickson, AIA From: Simon Van Leeuwen [EMAIL PROTECTED] Organization: Radius Systems Date: Thu, 29 Dec 2005 11:37:15 -0800 To: [EMAIL PROTECTED] [EMAIL PROTECTED] Cc: soaring@airage.com Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? The current quality of servos available to us from all marques continue to improve. Singling out a marque and calling it crap as someone stated just leads to a silly pissing contest and clouds the issue. It's easier to install a fatter servo like the 368, as there is less chance of a problem precisely as a result of it being beefier. Let's not confuse the issue by diminishing the abilities of the thinner servo. Again...it is not the servos fault! -- Simon Van Leeuwen RADIUS SYSTEMS PnP SYSTEMS - The E-Harness of Choice Cogito Ergo Zooom 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
RE: [RCSE] What are you doing to kill 5125/168 servos?
-Original Message- From: Tom Watson [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 28, 2005 12:36 AM To: Soaring Exchange Subject: [RCSE] What are you doing to kill 5125/168 servos? Damn...what are you guys doing to kill the flat wing servos? I used the Hitec 5125s on the ailerons of my first Pike Superior (mainly because I was lazy and the JR 168 leads were too short) and never had a problem for two years. They get killed the first time out with the plane's new owner. Other flyers gripe about constant gear stripping. Tom, I have not seen your launch but I have seen Phil's. I can see him breaking just about anything on that launch. See: www.SoarCASA.org/frame.htm. Picture doesn't do it justice. Bert 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
I have used a total of 6 5125s/ds168s - four of the 5125 and two 168, they all stripped, within weeks of install. They are nothing but crap in my book. Walter - Original Message - From: Tom Watson [EMAIL PROTECTED] To: Soaring Exchange soaring@airage.com Sent: Tuesday, December 27, 2005 9:36 PM Subject: [RCSE] What are you doing to kill 5125/168 servos? Damn...what are you guys doing to kill the flat wing servos? I used the Hitec 5125s on the ailerons of my first Pike Superior (mainly because I was lazy and the JR 168 leads were too short) and never had a problem for two years. They get killed the first time out with the plane's new owner. Other flyers gripe about constant gear stripping. I have the JR 168s on all four wing surfaces of my current Superior and it has had no problems, even flying at near full ballast in some pretty stiff winds (pulling hard enough to bust new braided line and some less than perfect landings thrown in). Granted, not F3J tows, but still... The JR 168s are on the ailerons of my current F3B ships and so far, so good. The 168s even survived the...um...demise of my first Furio (may it RIP) and that was a pretty violent pile-in. Enough to break the wing joiner in two and split both wings apart - tore an aileron loose and ripped one of the servos out of the wing. Both 168 servos were completely unscathed. Does not compute. Over. Tom 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
- Original Message - From: Tom Watson [EMAIL PROTECTED] what are you guys doing to kill the flat wing servos? Ford Long shaft winch, strong winch battery, short (600ft?) 240 lb test braided winch line, no retriever, bit of a breeze. All of that in combination with an agressive (even abusive), unpracticed launch style that generally involved diving too deeply on the zoom and most importantly a model with very heavy ailerons that had a strong tendency to flutter. Just ask anybody that attended last June's LISF (Long Island Silent Flyers) contest. They will tell you what a Pike Superior SL sounds like when the ailerons are fluttering so violently that the entire wing is twisting to very odd angles. This happened repeatedly even after switching to DS368 servos. The HS5125s stripped on the first launch. The DS368s survived a few of those launches although the lighter servo arms did not survive, the servo mounts did not survive and finally, after going beefy on the servo arms and on the servo mountings, the control horns in the ailerons ripped out. I kept trying to beef up the aileron servos and mountings because I was stuck on Long island with only the Pike to fly and it was my mind-set that molded models were buy and fly and the Pike was an F3J model that should be able to handle any launch you can give it. It isn't pulling hard on launch that strips the gears. With the Pike Superior SL it is the going really fast that does the trick. The biggest problem on that particular model seamed to be that the ailerons were really heavy which is bad from a flutter perspective. David Hobby (current F3J world champion and Pike flyer) suggested using longer horns on the ailerons. I never tried that since I sold the model first. Phil 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
On 12/28/05, Phil Barnes [EMAIL PROTECTED] wrote: - Original Message - From: Tom Watson [EMAIL PROTECTED] what are you guys doing to kill the flat wing servos? Just ask anybody that attended last June's LISF (Long Island Silent Flyers) contest. They will tell you what a Pike Superior SL sounds like when the ailerons are fluttering so violently that the entire wing is twisting to very odd angles. If control surfaces are fluttering NO SERVO is long for this world, nor wing for that matter. Fix the flutter! Lighter surfaces help but the biggest thing is mass ballancing. When I built a Long-EZ (full size) is was made clear that the control surfaces MUST ballance in spec or they will flutter with the surface usually coming off and then other nasty things happening. At the speeds we are getting I expect to soon be seeing mass ballancing on surfaces soon. michael 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
Hi Guys I just have to jump in here I killed 8 Hitec 5125 servos in my 5 meter Ventas 2 ax thank god it was on the bench before I got her in the air! After month's of trying to figure out what was the cause was wire size, connector plugs, bad solder joints. I finally changed out all the Hitec wing servos to Airtronics 141 servos and have never had a problem since! I'll never use the 5125 again in any plane I care about or fly hard. My two cents. Cheers Al - Original Message - From: Michael Neverdosky [EMAIL PROTECTED] To: Soaring Exchange soaring@airage.com Sent: Wednesday, December 28, 2005 10:47 AM Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? On 12/28/05, Phil Barnes [EMAIL PROTECTED] wrote: - Original Message - From: Tom Watson [EMAIL PROTECTED] what are you guys doing to kill the flat wing servos? Just ask anybody that attended last June's LISF (Long Island Silent Flyers) contest. They will tell you what a Pike Superior SL sounds like when the ailerons are fluttering so violently that the entire wing is twisting to very odd angles. If control surfaces are fluttering NO SERVO is long for this world, nor wing for that matter. Fix the flutter! Lighter surfaces help but the biggest thing is mass ballancing. When I built a Long-EZ (full size) is was made clear that the control surfaces MUST ballance in spec or they will flutter with the surface usually coming off and then other nasty things happening. At the speeds we are getting I expect to soon be seeing mass ballancing on surfaces soon. michael 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
Al, 5125's are not appropriate for such a large aircraft. This is not the servo's fault. Albert E. Wedworth wrote: Hi Guys I just have to jump in here I killed 8 Hitec 5125 servos in my 5 meter Ventas 2 ax thank god it was on the bench before I got her in the air! After month's of trying to figure out what was the cause was wire size, connector plugs, bad solder joints. I finally changed out all the Hitec wing servos to Airtronics 141 servos and have never had a problem since! I'll never use the 5125 again in any plane I care about or fly hard. My two cents. Cheers Al - Original Message - From: Michael Neverdosky [EMAIL PROTECTED] To: Soaring Exchange soaring@airage.com Sent: Wednesday, December 28, 2005 10:47 AM Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? On 12/28/05, Phil Barnes [EMAIL PROTECTED] wrote: - Original Message - From: Tom Watson [EMAIL PROTECTED] what are you guys doing to kill the flat wing servos? Just ask anybody that attended last June's LISF (Long Island Silent Flyers) contest. They will tell you what a Pike Superior SL sounds like when the ailerons are fluttering so violently that the entire wing is twisting to very odd angles. If control surfaces are fluttering NO SERVO is long for this world, nor wing for that matter. Fix the flutter! Lighter surfaces help but the biggest thing is mass ballancing. When I built a Long-EZ (full size) is was made clear that the control surfaces MUST ballance in spec or they will flutter with the surface usually coming off and then other nasty things happening. At the speeds we are getting I expect to soon be seeing mass ballancing on surfaces soon. michael 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format -- Simon Van Leeuwen RADIUS SYSTEMS PnP SYSTEMS - The E-Harness of Choice Cogito Ergo Zooom 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
I've just built 3 large scale planes, they sure don't give you much room in those wings to mount a very big servo. dh Al, 5125's are not appropriate for such a large aircraft. This is not the servo's fault. Albert E. Wedworth wrote: Hi Guys I just have to jump in here I killed 8 Hitec 5125 servos in my 5 meter Ventas 2 ax thank god it was on the bench before I got her in the air! After month's of trying to figure out what was the cause was wire size, connector plugs, bad solder joints. I finally changed out all the Hitec wing servos to Airtronics 141 servos and have never had a problem since! I'll never use the 5125 again in any plane I care about or fly hard. My two cents. Cheers Al - Original Message - From: Michael Neverdosky [EMAIL PROTECTED] To: Soaring Exchange soaring@airage.com Sent: Wednesday, December 28, 2005 10:47 AM Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? On 12/28/05, Phil Barnes [EMAIL PROTECTED] wrote: - Original Message - From: Tom Watson [EMAIL PROTECTED] what are you guys doing to kill the flat wing servos? Just ask anybody that attended last June's LISF (Long Island Silent Flyers) contest. They will tell you what a Pike Superior SL sounds like when the ailerons are fluttering so violently that the entire wing is twisting to very odd angles. If control surfaces are fluttering NO SERVO is long for this world, nor wing for that matter. Fix the flutter! Lighter surfaces help but the biggest thing is mass ballancing. When I built a Long-EZ (full size) is was made clear that the control surfaces MUST ballance in spec or they will flutter with the surface usually coming off and then other nasty things happening. At the speeds we are getting I expect to soon be seeing mass ballancing on surfaces soon. michael 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format -- Simon Van Leeuwen RADIUS SYSTEMS PnP SYSTEMS - The E-Harness of Choice Cogito Ergo Zooom 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
Ive hit my F3J full carbon Pike very hard in a breeze during launch and have yet to experience any control surface flutter. I dont go really deep into the bucket on zoom though, especially in wind. Not because of the wing flutter issue Phil experienced, but because it seems to me a short quick zoom/ping off the line always results in higher launches for me. Ride that zoom deep into the bucket and perhaps youve lost much of that stored line energy? Plus you may just flutter your wing off. Just my stupid opinion. Walter - Original Message - From: Phil Barnes [EMAIL PROTECTED] To: Soaring Exchange soaring@airage.com Sent: Wednesday, December 28, 2005 6:03 AM Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? - Original Message - From: Tom Watson [EMAIL PROTECTED] what are you guys doing to kill the flat wing servos? Ford Long shaft winch, strong winch battery, short (600ft?) 240 lb test braided winch line, no retriever, bit of a breeze. All of that in combination with an agressive (even abusive), unpracticed launch style that generally involved diving too deeply on the zoom and most importantly a model with very heavy ailerons that had a strong tendency to flutter. Just ask anybody that attended last June's LISF (Long Island Silent Flyers) contest. They will tell you what a Pike Superior SL sounds like when the ailerons are fluttering so violently that the entire wing is twisting to very odd angles. This happened repeatedly even after switching to DS368 servos. The HS5125s stripped on the first launch. The DS368s survived a few of those launches although the lighter servo arms did not survive, the servo mounts did not survive and finally, after going beefy on the servo arms and on the servo mountings, the control horns in the ailerons ripped out. I kept trying to beef up the aileron servos and mountings because I was stuck on Long island with only the Pike to fly and it was my mind-set that molded models were buy and fly and the Pike was an F3J model that should be able to handle any launch you can give it. It isn't pulling hard on launch that strips the gears. With the Pike Superior SL it is the going really fast that does the trick. The biggest problem on that particular model seamed to be that the ailerons were really heavy which is bad from a flutter perspective. David Hobby (current F3J world champion and Pike flyer) suggested using longer horns on the ailerons. I never tried that since I sold the model first. Phil 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] What are you doing to kill 5125/168 servos?
What does an aircraft's size have to do with servo selection? Required servo torque should be determined by the force required on the control surface. A small aileron on a slow flying large airplane can be powered by a very small servo. A 5125 (or JR equivalent) is perfectly fine for the ailerons or elevator on Al's 5M Ventus. If two were used on each flap that would be fine as well. I would think that the rudder would want a little more than a 5125. -Ben Simon Van Leeuwen wrote: Al, 5125's are not appropriate for such a large aircraft. This is not the servo's fault. Albert E. Wedworth wrote: Hi Guys I just have to jump in here I killed 8 Hitec 5125 servos in my 5 meter Ventas 2 ax thank god it was on the bench before I got her in the air! After month's of trying to figure out what was the cause was wire size, connector plugs, bad solder joints. I finally changed out all the Hitec wing servos to Airtronics 141 servos and have never had a problem since! I'll never use the 5125 again in any plane I care about or fly hard. My two cents. Cheers Al - Original Message - From: Michael Neverdosky [EMAIL PROTECTED] To: Soaring Exchange soaring@airage.com Sent: Wednesday, December 28, 2005 10:47 AM Subject: Re: [RCSE] What are you doing to kill 5125/168 servos? On 12/28/05, Phil Barnes [EMAIL PROTECTED] wrote: - Original Message - From: Tom Watson [EMAIL PROTECTED] what are you guys doing to kill the flat wing servos? Just ask anybody that attended last June's LISF (Long Island Silent Flyers) contest. They will tell you what a Pike Superior SL sounds like when the ailerons are fluttering so violently that the entire wing is twisting to very odd angles. If control surfaces are fluttering NO SERVO is long for this world, nor wing for that matter. Fix the flutter! Lighter surfaces help but the biggest thing is mass ballancing. When I built a Long-EZ (full size) is was made clear that the control surfaces MUST ballance in spec or they will flutter with the surface usually coming off and then other nasty things happening. At the speeds we are getting I expect to soon be seeing mass ballancing on surfaces soon. michael 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format 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. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
