Should Servo touch chassis?

[skom25 2179]

Hi,

I want to use servo mounts like below:

Servo mounts are installed at two points which are around 2 mm above flat part of chassis.

In that case, servo will be in the air.

Is this fine?

Standard servo mounts are bit shorter and servo is little lower, but I am not sure if it touches chassis.

[Twinfan 2013]

If you get height adjustable ones instead you won't have the floating problem:

https://www.yeahracing.com/yeah-racing-aluminum-height-adjustable-servo-mount-for-1-10-black-ya-0538bk-00073041

[CoolHands 949]

Some models are like that, it usually won’t be a problem. 

[Carmine A 2435]

I believe that the Tamiya ones are placed so the Servo is flush... because of the inherent flex of the soft nylon mounts. I  would still want flush mounting, like @Twinfan said, so you don't flex the chassis tub as much. 

[skom25 2179]

@Nicadraus what is you experience in this topic with XV-01?

I bought TRF 416 mounts #3454510 which are like that:

As comparison, this is RM-01 mount which is dedicated for XV-01:

They even have the same small "step" at bottom of mount. Only possible difference that can be between them, is that on RM-01 holes are bit lower, so servo can be mounted closer to chassis. However, I am not sure and it is not possible to measure this without parts in hands.

I can also use quite stiff self adhesive foam #54430 to close gap, so servo will not float.

[alvinlwh 7227]

Most race grade cars have floating servo mounts for a reason. Hack, even my relatively cheap 3R M4 has a floating servo mount. 

[Pylon80 3676]

There is absolutely no "problem" with the servo touching or not touching. You can proceed!

This is not what a "floating mount" means in modern TC by the way. Floating mounts attach to the chassis from one side to avoid the servo and its mount acting together as a chassis brace, that would change the chassis' flex characteristics on the servo side.

Now, since the picture you posted looks like the much loved but long since discontinued RM-01 mounts 😍 by all means share with us your source if you found a set!

[skom25 2179]

5 minutes ago, Pylon80 said:

There is absolutely no "problem" with the servo touching or not touching. You can proceed!

This is not what a "floating mount" means in modern TC by the way. Floating mounts attach to the chassis from one side to avoid the servo and its mount acting together as a chassis brace, that would change the chassis' flex characteristics on the servo side.

Now, since the picture you posted looks like the much loved but long since discontinued RM-01 mounts 😍 by all means share with us your source if you found a set!

As I wrote, I bought part #3454510. TRF 416 servo post.

Thank you!

[Pylon80 3676]

1 hour ago, skom25 said:

As I wrote, I bought part #3454510. TRF 416 servo post.

Thank you!

That mount is the best looker 👌

[skom25 2179]

28 minutes ago, Pylon80 said:

That mount is the best looker 👌

If you are looking for similar mount, you can also try #54090. To be honest, they all look almost the same and I think that differences are minimal.

[Pylon80 3676]

1 hour ago, skom25 said:

If you are looking for similar mount, you can also try #54090. To be honest, they all look almost the same and I think that differences are minimal.

The one you bought as well as 54090 have been discontinued for almost 10 years now, having been depleted by TT-02 users after 2013 😟 so yours must have been a lucky find!

[skom25 2179]

Seriously?

I just check from time to time, what interesting my LHS has in offer. There is a lot of interesting stuff, but I was pretty sure that mentioned parts are from more or less current catalogue.

Such a shame that we do not have international Ebay here. Maybe I am sleeping on money

[Twinfan 2013]

8 minutes ago, Pylon80 said:

The one you bought as well as 54090 have been discontinued for almost 10 years now, having been depleted by TT-02 users after 2013 😟 so yours must have been a lucky find!

https://www.plazajapan.com/4950344540907/

54090 available at PJ...

https://tamico.de/Tamiya-13454510-Servo-Mount-A-for-42106

And the other at Tamico...

[Nicadraus 6482]

13 hours ago, skom25 said:

@Nicadraus what is you experience in this topic with XV-01?

I bought TRF 416 mounts #3454510 which are like that:

As comparison, this is RM-01 mount which is dedicated for XV-01:

They even have the same small "step" at bottom of mount. Only possible difference that can be between them, is that on RM-01 holes are bit lower, so servo can be mounted closer to chassis. However, I am not sure and it is not possible to measure this without parts in hands.

I can also use quite stiff self adhesive foam #54430 to close gap, so servo will not float.

I'm using the RM-01 mounts on my XV-01 (also in my FF-03 cars).

As seen below, I placed a 2mm carbon fiber plate which raised the servo. Works perfectly.

 

Th XV-01 doesn't require a floating servo mount. Servo is mounted sideways so floating the servo is pointless.  It is a race-worthy car.

5 hours ago, Pylon80 said:

This is not what a "floating mount" means in modern TC by the way. Floating mounts attach to the chassis from one side to avoid the servo and its mount acting together as a chassis brace, that would change the chassis' flex characteristics on the servo side.

Agreed.

[skom25 2179]

Thank you!

In that case, I assume it is totally fine that servo will not touch chassis. I was bit worried that it will have negative impact on chassis durability, but probably I am overthinking this.