Team Durango DNX408 Prototype
#1052
i just read on redrc that he didnt finish Q1 and didnt even get to start Q2 both due to electrical problems. i hope he works it out b/c at of all the cars and drivers i have been really looking foward to watching him and the dnx-408 Hopefully this set-back doesnt get to his morale b/c i think he could do very well in the next round
#1054
Tech Apprentice
#1056
#1057
Tech Master
iTrader: (12)
Ryan's skills are not in question, neither is the general handling of the 408, but we all know that when awe-inspiring driving/handling butts heads with mechanical gremlins, the gremlins always win.
#1058
Tech Apprentice
#1061
I'm not sold on the heat issue being the reason for these failures honestly. Serpent or 408.
Not to get into an engineering debate here but, there just isn't that much thermal transfer available. We're talking a delta T of what, 100*F maybe surface to surface??? Couple that with it's location (really low on the chassis) and it's physical proximity, I just don't see that much heat being transfered into the servo.
It's not like it's a conduction issue where it's in direct contact. We're talking convection from an inch away. Air isn't a good conductor so there shouldn't be that much heat getting to the servo. I can't believe a servo wouldn't be able to handle surface temps of 120-130*F (I believe I had heard surface temp verification of 120's)? Put your hand an inch from the motor and see how little heat actually gets to you. It's not that significant.
I wonder if it has more to do with chassis flex and or shock on the servo based on it's mounting orientation. Being mostly surface mount construction (PCB fab), the shock/load applied 90* to the board maybe problematic????
Just talking out loud. I know it "appears" to be prevalant on both cars but I wonder if it's layout related more than anything....????
Not to get into an engineering debate here but, there just isn't that much thermal transfer available. We're talking a delta T of what, 100*F maybe surface to surface??? Couple that with it's location (really low on the chassis) and it's physical proximity, I just don't see that much heat being transfered into the servo.
It's not like it's a conduction issue where it's in direct contact. We're talking convection from an inch away. Air isn't a good conductor so there shouldn't be that much heat getting to the servo. I can't believe a servo wouldn't be able to handle surface temps of 120-130*F (I believe I had heard surface temp verification of 120's)? Put your hand an inch from the motor and see how little heat actually gets to you. It's not that significant.
I wonder if it has more to do with chassis flex and or shock on the servo based on it's mounting orientation. Being mostly surface mount construction (PCB fab), the shock/load applied 90* to the board maybe problematic????
Just talking out loud. I know it "appears" to be prevalant on both cars but I wonder if it's layout related more than anything....????
#1062
Tech Apprentice
This horse is beaten fully to death^^^ Serpent had servo problems! Point blank-they addressed it-done!
Me and Captain America obviously had the same thought as Gerd was involved in the design of both. I dont think the servo is that close in the Durango is it? Just same designer sparked a gut scare-thats all! Nothing has been proven, no rumors started!!
Me and Captain America obviously had the same thought as Gerd was involved in the design of both. I dont think the servo is that close in the Durango is it? Just same designer sparked a gut scare-thats all! Nothing has been proven, no rumors started!!
#1063
You put your hand on a buggy chassis an inch away from the motor mount screws and you won't be leaving it there long my friend and will far exceed 120. Chassis' and mounts are designed to be heat sinks to some degree. Also the servo's are fractions off the chassis not an inch away. Just sayin'
#1064
Tech Master
iTrader: (12)
If you doubt this, go for a ride on a bumpy road in the front passenger seat, then go down that same stretch of road, but sitting in the back seat. Now do it at ten times the speed and that's what your servo has to endure for a whole hour
On a more serious note, I hope I'm dead wrong and Ryan bounces back.
#1065
Tech Lord
iTrader: (52)
It's a little overboard to assume that Ryan's electrical issues = blown servo ala Serpent. Considering how long the Durango has been in testing I think someone would have mentioned by now if it had similar problems to the Serpent. Wait and see what the real issues are before assuming it's blowing servos