Im trying to decide on a new servo for when I get a m18 pro. I was going for the multiplex polo digi 4 at first since its a perfect fit, great speed and torque, and uses the stock servo saver.
Multiplex Polo Digi 4
(4.8V)
Torque: 39 ounces
Speed .10 sec.
-ball bearing and metal geared
However, I do like the idea of having a bit more room and the ability to move the servo closer to the midline of the car with a micro servo. The problem with the digital (Im ONLY looking for digital) micro servos is they are either not fast enough (I want under .11 at 4.8V), or have questionable amounts of torque. That and of course I cant use the Xray Servo Saver (which rocks), and will have to custom mount it.
Hobby Electronics HDS-877
(4.8V)
Torque: 17 ounces
Speed: .11
-no idea. assuming no BB and Plastic.
KO Propo PDS-3014
(6.0V - NO ONE Has specs for it for 4.8V. Expecting .13 sec, and 24 torque)
Torque: 27.75 oz/in
Speed: .11 sec @ 60°
-ball bearing metal/plastic geared
(The Tekin specs for the micro they listed aren't that great speed wise, so its out of the running)
So, it sounds like the Futuba is the closest. I am just wondering if 20 ounces is enough torque for a sedan running on foams on carpet? I also then will need to find a good quality servo saver that will fit its output spline.
Bobby, those are waaay to slow, not digital, and not micro. (They are Mini size). I would suggest you try the Multiplex as then you could really see a difference and understand why I prefer faster speeds.
The ones I listed are about 24mm, and are micro/sub size.
I more interested in ounces of torque needs for 1/18th sedan as again the cut off whats acceptable torque. I have a friend using a KOpropo in his panther, and its just soo darn nice having all that extra room. I just think the KO propo is still too sloow for my needs.
The speed and torque of the KO are more than sufficient. So anything compairable would be great. Plenty guys running it in 18t/b around here, and it will walk the truck off of a barrier.
Duneland, do you have a idea of what I would need torque wise though? I would rather get the Futaba since its .03 seconds faster (and cheaper). Have no idea of what its spline output it like though to match up to existing micro savers.
Bobby, I threw most of my trophies away as I don't have the space.
Besides, its all driving style. I'm used to not having as much delay before action/reaction. So my driving style has adapted that way. You have done the opposite.
I may just fall back on the Multiplex as its been proven. :/
For me speed is important of coarse but torque translates for me into durability. The more torque rating then hopefully the longer the servo will last. I prefer not to use a servo saver (just like in 1/10th scale) so that's my dilema.
You should pick up 2 kinds of servos and track test both- never know until you try
Ok, I think im going with the ko or the futaba as I would gain around 5-6mm of space behind the servo!
I know the KO is a safe bet. Im still wanting the futaba more since it is faster (and cheaper), but still worried about the torque needs.
If anyone knows this info.. The futaba has a 3.98 mm, 15 spline output shaft. Can anyone compare that with the current micro savers to tell me if that matches up any currently available?
Ok, I think im going with the ko or the futaba as I would gain around 5-6mm of space behind the servo!
I know the KO is a safe bet. Im still wanting the futaba more since it is faster (and cheaper), but still worried about the torque needs.
If anyone knows this info.. The futaba has a 3.98 mm, 15 spline output shaft. Can anyone compare that with the current micro savers to tell me if that matches up any currently available?
I know the HPI MRS4 servo saver has multiple spines so they fit just about every micro and cost hardly anything...
I know Xray does make a servo horn (no saver) that fits micro Futaba servos...but if you hit alot of barriers it might not be a good thing to try.
Hope that helps,
-Shookie <><
AE makes a pretty good servo saver for all brands as well.
__________________ All who love the LORD JESUS I praise with you.1 Cor 10:31 Team HOLY Rollers (Team Manager) The Church is a Hospital for Sinners not a Museum for Saints. RcTech Feedback<><RC Tech Subcriber #92
I know the HPI MRS4 servo saver has multiple spines so they fit just about every micro and cost hardly anything...
I know Xray does make a servo horn (no saver) that fits micro Futaba servos...but if you hit alot of barriers it might not be a good thing to try.
Hope that helps,
-Shookie <><
AE makes a pretty good servo saver for all brands as well.
No, unfortunately the Futaba in question is smaller than the other Futaba servos. Its brand new on the market. I am sending them an email to see if by chance it still takes the larger size output spline (if so, then I have my servo).
BTW: Xray does offer a servo saver (best micro one there is IMO). Its just doesn't have spline matches for these smaller micro servos listed above.
(The associated servo saver sucks btw. Cheap plastic C clip that looses all precision. Im not sure the HPI has splines for these smaller outputs. I think duneland mentioned the Sportwerks Chaos is the best he could find for at least the KO).
The Futaba listed first is just as fast, but more torque.
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