Hello Everyone, May I start by thanking Adam Till for his subsequent messages explaining in more detail the reported failure of the 5125. We at Hitec (and I suspect the whole soaring community) will be watching for any failure trend that develops concerning this product.
As for the 5125 in question, can we have sent back to our service department for evaluation? I will see that a new one is forwarded to the owner. We do track all the failure points of every returned product, so we can spot any chronic flaws. Glen Merritt Marketing Director Hitec USA Phone # 858-748-6948 x310 Fax # 858-748-1767 -----Original Message----- From: Simon Van Leeuwen [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 16, 2002 10:12 AM To: Adam Kenneth Till Cc: Glen; 'Ben Diss'; 'plenard'; 'RCSE' Subject: Re: [RCSE] New Hitec Wing servos (and Volz Wing Maxx) HITEC Indeed a 5125 did start to melt the servo cover this last weekend, but to say that the servo in question caused the crash would be erroneous and misleading. In fact, a crash had occurred that caused enough of a bind on this particular servo's control surface to cause it to overheat. Given the digital electronics and associated update-rate, and low (thermal) mass of the servo itself, and the fact it was running on two 5-cell packs (redundancy), it's no wonder it complained (loudly). Under normal flying loads, these servos operate satisfactory. Any (digital) servo subject to undo loads as a result of a crash (or otherwise) could be expected to react in the very same manner. In other words...don't doodle on the way to the crash site if you use digital servos. VOLZ Indeed early versions of the Wing Maxx exhibited centering issues, and through testing showed temperature-specific drift in the amp design. This made for constant re-centering on most trips to the field. Although not widely known, a higher quality ceramic capacitor was offered as a fix, but required SMT-level soldering skills. Installing this, and the results, were less than stellar however. The PCB has since been updated. As predicted, Michael will be releasing a digital versions of their servo line-up, which might bring them up to on-par performance with their counterparts. As always, we will have to wait and see. Adam Kenneth Till wrote: > > Nope, not the case I meant. This was in the outboard aileron of a 4m > Salto. The airplane didn't quite make it back to the airfield after an > aborted aerotow, and put down (relatively hard) in a farmers field. The > aileron didn't have anything to do with the forced landing...gravity did. > > The Salto was found resting with one tip on a pile of dirt, and smoke was > pouring from the tip. The servo motor had burned through the case of the > servo AND the case of the mount. > > This isn't exactly an inappropriate application...and I resent having been > dismissed as a gossip-monger. > > Cheers, > Adam > > ---------------------------------------------------- > It's a big mistake to allow any mechanical object to > realize that you are in a hurry. > ---------------------------------------------------- > The trouble with doing something right the first > time is that nobody appreciates how difficult it was. > ----------------------------------------------------- > > On Mon, 15 Jul 2002, Glen wrote: > > > > > Hi Guys, > > > > How about "the rest of the story". > > > > We at Hitec are aware of a HS-5125MG failing in flight in the manor > > described by Mr. Till while being used as the elevator servo on a 15-17 > > pound turbine powered jet model. > > > > Would Mr. Till be willing to confirm this is the case to which he is > > referring to? > > > > If this is the failure in question, I would have the modeling public > > know the application of the 5125MG was inappropriate. Digital circuitry > > in a servo rated at 49oz/in does not make the servo "magical" and thus > > capable of over coming the very strict and unyielding laws of physics. > > There is an old saying "use the right tool for the job", it is clear the > > 5125MG was not the correct servo for the elevator of that heavy plane. > > Ladies and Gentleman please learn from this mistake so it is not > > replicated elsewhere. > > > > It is regrettable anytime a expensive plane "goes in" for a mechanical > > reasons, it is further regrettable a good, solid product such as the > > Hitec 5125MG is defamed through gossip on the internet. > > > > Glen Merritt > > Marketing Director > > Hitec USA > > Phone # 858-748-6948 x310 > > Fax # 858-748-1767 > > > > > > -----Original Message----- > > From: Adam Kenneth Till [mailto:[EMAIL PROTECTED]] > > Sent: Sunday, July 14, 2002 6:44 PM > > To: Ben Diss > > Cc: plenard; RCSE > > Subject: Re: [RCSE] New Hitec Wing servos (125MG and 5125MG-Digital) > > > > > > Having recently seen one burn a hole through it's case and cover after a > > surface was jammed, I wouldn't touch them with a 10 foot pole. I think > > they have "current draw issues". > > > > Cheers, > > Adam Till > > > > ---------------------------------------------------- > > It's a big mistake to allow any mechanical object to > > realize that you are in a hurry. > > ---------------------------------------------------- > > The trouble with doing something right the first > > time is that nobody appreciates how difficult it was. > > ----------------------------------------------------- > > > > On Thu, 11 Jul 2002, Ben Diss wrote: > > > > > > > > Love them. Thin, fast, strong and programmable. They even come with > > a metal arm. > > > > > > -Ben > > > > > > > plenard wrote: > > > > > > > > Has anyone tried these new Hitec wing servos for TD > > applications...and what do you think? I am considering moving up from > > my tried and true 85MG's. Thanks. > > > > > > > > Bob Lenard > > > > Laguna Niguel, CA > > > RCSE-List facilities provided by Model Airplane News. Send > > "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] > > > > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" > > and "unsubscribe" requests to [EMAIL PROTECTED] > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] -- *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~* 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]
