RCU Forums - View Single Post - Hitec or JR digitals ?
View Single Post
Old 11-01-2002 | 08:18 PM
  #29  
JohnW's Avatar
JohnW
Senior Member
My Feedback: (6)
 
Joined: Mar 2002
Posts: 1,815
Likes: 0
Received 0 Likes on 0 Posts
From: Lincoln, NE
Default Numerous Issues???

What "Numerous" issues are you referring too? The only issues I know about concerning the JR8411 line is that the DS8411/DS8411SA servo when used in large .80 to .90 sized helis with extreme 3D setups have an increased chance of failure when subjected to this use for an extended period of time. Horizon Hobby is offering a free upgrade to the DS8311 heli servo to anyone with the DS8411/DS8411SA servo. http://www.horizonhobby.com/media/pd...e-jrps8411.pdf

Quite honestly, I see the JR issues as being very different than the Hitec Digital issue. Both are being taken care of by the vendors; however, the Hitec issue is different. It would be difficult (but not impossible) for JR to find the failure mode due to large 3D heli loads over time. The failure really only seems to occur in heli applications from what I understand. They (JR) would have to determine that the MTBF was too low in that application... anyone that knows about predicting MTBF would understand that is no easy task. As for the Hitec programming issue, all Hitec had to do was use a JR or Futaba tx, crank the ATVs up and watch their servo go full deflection and fail. In fact, they should have been able to predict the failure without even bench testing because it is software based. I think the fact that it WAS only a simple programming issue and they let it go on for months speaks volumes. I understand Hitec has fixed the problem; however, I have lost confidence. I was lucky in that I caught the problem just before my third flight.

For me, it is not an issue of who failed (everybody's equipment fails), rather, it is WHY did it fail.

Beyond that. It is my understanding that deadband can be set on the Hitec digitals. This would make matching servos a bit easier (less fighting) at the expense of precision. Not to mention the ATV and centering. I think only time will tell as to which method is best - direct programming(Hitec) or indirect (JR matchbox and Futaba Servo Sync.)